二进制安装Kubernetes v1.25.0
部署步骤：
- 先部署一个master + 两个node节点集群
- 在加入两个master进来
- 加入负载均衡
1. 部署规划表
|
hostname |
IP |
Software |
Version |
|
k8s-master01 |
192.168.80.61 |
kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 |
20.04.1-Ubuntu |
|
k8s-master02 |
192.168.80.62（最后部署） |
kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 |
20.04.1-Ubuntu |
|
k8s-master03 |
192.168.80.63（最后部署） |
kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 |
20.04.1-Ubuntu |
|
k8s-node01 |
192.168.80.64 |
kubelet、kube-proxy、nfs-client |
20.04.1-Ubuntu |
|
k8s-node02 |
192.168.80.65 |
kubelet、kube-proxy、nfs-client |
20.04.1-Ubuntu |
|
VIP |
192.168.80.66 |
版本表：
|
软件 |
版本 |
|
kernel |
5.4.0-125 |
|
Ubuntu |
20.04.1 |
|
kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy |
v1.25.0 |
|
etcd |
v3.5.4 |
|
containerd |
v1.6.8 |
|
cfssl |
v1.6.1 |
|
cni |
v1.1.1 |
|
crictl |
v1.24.2 |
|
haproxy |
v1.8.27 |
|
keepalived |
v2.1.5 |
网段：
物理主机：192.168.80.0/24
service：10.96.0.0/12
pod：172.16.0.0/12
2. 环境准备
- k8s-master01、k8s-node01、k8s-node02操作
# 1. 修改主机名
hostnamectl set-hostname k8s-master01
hostnamectl set-hostname k8s-node01
hostnamectl set-hostname k8s-node02
# 2. 主机名解析
cat >> /etc/hosts <<EOF
192.168.80.61 k8s-master01
192.168.80.62 k8s-master02
192.168.80.63 k8s-master03
192.168.80.64 k8s-node01
192.168.80.65 k8s-node02
EOF
# 3. 禁用 swap
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
# 4. 将桥接的IPv4流量传递到iptables的链
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system
# 5. 域名解析
echo "nameserver 8.8.8.8" >> /etc/resolv.conf
# 6. 进行时间同步（服务端）
apt install chrony -y
cat > /etc/chrony.conf << EOF
pool ntp.aliyun.com iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
allow 192.168.80.0/24
local stratum 10
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
# 查看系统时间与日期
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
hwclock --systohc
date -R
timedatectl set-local-rtc yes
timedatectl
systemctl restart chronyd.service
# 进行实际同步（客户端）
apt install chrony -y
cat > /etc/chrony.conf << EOF
pool 192.168.80.61 iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
systemctl restart chronyd.service
#使用客户端进行验证
chronyc sources -v
# 7. 日志目录
mkdir -p /var/log/kubernetes
# 8.配置ulimit
ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF
# 9.配置免密登录
apt install -y sshpass
ssh-keygen
export IP="192.168.80.61 192.168.80.64 192.168.80.65 "
export SSHPASS=kerwin
for HOST in $IP;do
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done
# 10.ipvsadm安装（lb除外）
apt-get install ipvsadm
cat >> /etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
systemctl restart systemd-modules-load.service
lsmod | grep -e ip_vs -e nf_conntrack
ip_vs_sh 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs 155648 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 139264 1 ip_vs
nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 2 nf_conntrack,ip_vs
# 11.修改内核参数 (lb除外)
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF
sysctl --system
# 命令补全
apt install bash-completion -y
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc3. k8s基本组件安装
3.1 k8s节点安装Containerd作为Runtime
- k8s-master01、k8s-node01、k8s-node02操作
# wget -P $HOME/k8s-install https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin
#解压cni二进制包
mkdir -p $HOME/k8s-install && cd $HOME/k8s-install
tar xf cni-plugins-linux-amd64-v1.1.1.tgz -C /opt/cni/bin/
# wget -P $HOME/k8s-install https://github.com/containerd/containerd/releases/download/v1.6.8/cri-containerd-cni-1.6.8-linux-amd64.tar.gz
#解压
cd $HOME/k8s-install
tar -xzf cri-containerd-cni-1.6.8-linux-amd64.tar.gz -C /
#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF3.1.1 配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF3.1.2 加载模块
systemctl restart systemd-modules-load.service3.1.3 配置Containerd所需的内核
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 加载内核
sysctl --system3.1.4 创建Containerd的配置文件
# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml
# 修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup
sed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image
sed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
sed -i "s#config_path\ \=\ \"\"#config_path\ \=\ \"/etc/containerd/certs.d\"#g" /etc/containerd/config.toml
mkdir /etc/containerd/certs.d/docker.io -pv
cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://hub-mirror.c.163.com"]
capabilities = ["pull", "resolve"]
EOF3.1.5 启动并设置为开机启动
systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd3.1.6 配置crictl客户端连接的运行时位置
# wget -P $HOME/k8s-install https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz
#解压
cd $HOME/k8s-install
tar xf crictl-v1.24.2-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
#测试
systemctl restart containerd
crictl info3.2 k8s与etcd下载及安装
- k8s-master01节点操作
3.2.1解压k8s安装包
# 下载安装包
# wget -P $HOME/k8s-install https://dl.k8s.io/v1.25.0/kubernetes-server-linux-amd64.tar.gz
# wget -P $HOME/k8s-install https://github.com/etcd-io/etcd/releases/download/v3.5.4/etcd-v3.5.4-linux-amd64.tar.gz
# 解压k8s安装文件
mkdir -p $HOME/k8s-install && cd $HOME/k8s-install
tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
# 解压etcd安装文件
tar -xf etcd*.tar.gz && mv etcd-*/etcd /usr/local/bin/ && mv etcd-*/etcdctl /usr/local/bin/
# 查看/usr/local/bin下内容
ls /usr/local/bin/
containerd containerd-shim-runc-v1 containerd-stress critest ctr etcdctl kube-controller-manager kubelet kube-scheduler containerd-shim containerd-shim-runc-v2 crictl ctd-decoder etcd kube-apiserver kubectl kube-proxy3.2.2 查看版本
[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.25.0
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.5.4
API version: 3.53.2.3 将组件发送至其他k8s节点
Work='k8s-node01 k8s-node02'
for NODE in $Work; do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done
mkdir -p /opt/cni/bin3.3 创建证书相关文件
- k8s-master01上操作
mkdir -p /root/ssl && cd /root/ssl
cat > admin-csr.json << EOF
{
"CN": "admin",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:masters",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
cat > etcd-ca-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > front-proxy-ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"ca": {
"expiry": "876000h"
}
}
EOF
cat > kubelet-csr.json << EOF
{
"CN": "system:node:\$NODE",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "system:nodes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > manager-csr.json << EOF
{
"CN": "system:kube-controller-manager",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-controller-manager",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > apiserver-csr.json << EOF
{
"CN": "kube-apiserver",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > etcd-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF
cat > front-proxy-client-csr.json << EOF
{
"CN": "front-proxy-client",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
cat > kube-proxy-csr.json << EOF
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-proxy",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > scheduler-csr.json << EOF
{
"CN": "system:kube-scheduler",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-scheduler",
"OU": "Kubernetes-manual"
}
]
}
EOF
cd .. && mkdir -p bootstrap && cd bootstrap
cat > bootstrap.secret.yaml << EOF
apiVersion: v1
kind: Secret
metadata:
name: bootstrap-token-c8ad9c
namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
description: "The default bootstrap token generated by 'kubelet '."
token-id: c8ad9c
token-secret: 2e4d610cf3e7426e
usage-bootstrap-authentication: "true"
usage-bootstrap-signing: "true"
auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubelet-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-certificate-rotation
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:kube-apiserver-to-kubelet
rules:
- apiGroups:
- ""
resources:
- nodes/proxy
- nodes/stats
- nodes/log
- nodes/spec
- nodes/metrics
verbs:
- "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: system:kube-apiserver
namespace: ""
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:kube-apiserver-to-kubelet
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: kube-apiserver
EOF
cd .. && mkdir -p coredns && cd coredns
cat > coredns.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
- apiGroups:
- discovery.k8s.io
resources:
- endpointslices
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
log
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/name: "CoreDNS"
spec:
# replicas: not specified here:
# 1. Default is 1.
# 2. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
selector:
matchLabels:
k8s-app: kube-dns
template:
metadata:
labels:
k8s-app: kube-dns
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
tolerations:
- key: "CriticalAddonsOnly"
operator: "Exists"
nodeSelector:
kubernetes.io/os: linux
affinity:
podAntiAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 100
podAffinityTerm:
labelSelector:
matchExpressions:
- key: k8s-app
operator: In
values: ["kube-dns"]
topologyKey: kubernetes.io/hostname
containers:
- name: coredns
image: registry.cn-beijing.aliyuncs.com/dotbalo/coredns:1.8.6
imagePullPolicy: IfNotPresent
resources:
limits:
memory: 170Mi
requests:
cpu: 100m
memory: 70Mi
args: [ "-conf", "/etc/coredns/Corefile" ]
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
readOnly: true
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
securityContext:
allowPrivilegeEscalation: false
capabilities:
add:
- NET_BIND_SERVICE
drop:
- all
readOnlyRootFilesystem: true
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
readinessProbe:
httpGet:
path: /ready
port: 8181
scheme: HTTP
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
---
apiVersion: v1
kind: Service
metadata:
name: kube-dns
namespace: kube-system
annotations:
prometheus.io/port: "9153"
prometheus.io/scrape: "true"
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.96.0.10
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
- name: metrics
port: 9153
protocol: TCP
EOF
cd .. && mkdir -p metrics-server && cd metrics-server
cat > metrics-server.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
rbac.authorization.k8s.io/aggregate-to-admin: "true"
rbac.authorization.k8s.io/aggregate-to-edit: "true"
rbac.authorization.k8s.io/aggregate-to-view: "true"
name: system:aggregated-metrics-reader
rules:
- apiGroups:
- metrics.k8s.io
resources:
- pods
- nodes
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
rules:
- apiGroups:
- ""
resources:
- pods
- nodes
- nodes/stats
- namespaces
- configmaps
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server:system:auth-delegator
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:auth-delegator
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
ports:
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
selector:
matchLabels:
k8s-app: metrics-server
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
k8s-app: metrics-server
spec:
containers:
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem # change to front-proxy-ca.crt for kubeadm
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
image: registry.cn-beijing.aliyuncs.com/dotbalo/metrics-server:0.5.0
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
initialDelaySeconds: 20
periodSeconds: 10
resources:
requests:
cpu: 100m
memory: 200Mi
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
- name: ca-ssl
mountPath: /etc/kubernetes/pki
nodeSelector:
kubernetes.io/os: linux
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir
- name: ca-ssl
hostPath:
path: /etc/kubernetes/pki
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100
EOF4. 相关证书生成
# master01节点下载证书生成工具
# wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64" -O /usr/local/bin/cfssl
# wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljsonhttps://github.com/cloudflare/cfssl/releases
4.1 生成etcd证书
特别说明除外，以下操作在所有master节点操作
mkdir /etc/etcd/ssl -p4.1.1 master01节点生成etcd证书
mkdir -p /root/ssl && cd /root/ssl
# 生成etcd证书和etcd证书的key（如果你觉得以后可能会扩容，可以在ip那多写几个预留出来）
# 若没有IPv6 可删除可保留
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
cfssl gencert \
-ca=/etc/etcd/ssl/etcd-ca.pem \
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
-config=ca-config.json \
-hostname=127.0.0.1,k8s-master01,k8s-node01,k8s-node02,192.168.80.61,192.168.80.64,192.168.80.65 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
# 我们将etcd放在了k8s-master01、k8s-node01、k8s-node02中，上面的地址关联4.1.2 将证书复制到其他节点
Master='k8s-node01 k8s-node02'
for NODE in $Master; do ssh $NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}; done; done4.2 生成k8s相关证书
特别说明除外，以下操作在所有master节点操作
4.2.1 所有k8s节点创建证书存放目录
mkdir -p /etc/kubernetes/pki4.2.2 master01节点生成k8s证书
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
# 生成一个根证书 ，多写了一些IP作为预留IP，为将来添加node做准备
# 10.96.0.1是service网段的第一个地址，需要计算，192.168.80.66为高可用vip地址
# 若没有IPv6 可删除可保留
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-hostname=10.96.0.1,192.168.80.66,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,192.168.80.61,192.168.80.62,192.168.80.63,192.168.80.64,192.168.80.65,192.168.80.66,192.168.80.67,192.168.80.68,192.168.80.69,192.168.80.70,10.0.0.40,10.0.0.41 \
-profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver4.2.3 生成apiserver聚合证书
cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca
# 有一个警告，可以忽略
cfssl gencert \
-ca=/etc/kubernetes/pki/front-proxy-ca.pem \
-ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem \
-config=ca-config.json \
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client4.2.4 生成controller-manage的证书
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
# 设置一个集群项
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.80.61:6443 \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes \
--cluster=kubernetes \
--user=system:kube-controller-manager \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个用户项
kubectl config set-credentials system:kube-controller-manager \
--client-certificate=/etc/kubernetes/pki/controller-manager.pem \
--client-key=/etc/kubernetes/pki/controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置默认环境
kubectl config use-context system:kube-controller-manager@kubernetes \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.80.61:6443 \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler \
--client-certificate=/etc/kubernetes/pki/scheduler.pem \
--client-key=/etc/kubernetes/pki/scheduler-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-context system:kube-scheduler@kubernetes \
--cluster=kubernetes \
--user=system:kube-scheduler \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config use-context system:kube-scheduler@kubernetes \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.80.61:6443 \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-credentials kubernetes-admin \
--client-certificate=/etc/kubernetes/pki/admin.pem \
--client-key=/etc/kubernetes/pki/admin-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-context kubernetes-admin@kubernetes \
--cluster=kubernetes \
--user=kubernetes-admin \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig4.2.5 创建kube-proxy证书
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
kube-proxy-csr.json | cfssljson -bare /etc/kubernetes/pki/kube-proxy
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.80.61:6443 \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=/etc/kubernetes/pki/kube-proxy.pem \
--client-key=/etc/kubernetes/pki/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kube-proxy@kubernetes \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kube-proxy@kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig4.2.6 创建ServiceAccount Key ——secret
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub4.2.7 查看证书
ls /etc/kubernetes/pki/
admin.csr ca.csr front-proxy-ca.csr kube-proxy.csr scheduler-key.pem
admin-key.pem ca-key.pem front-proxy-ca-key.pem kube-proxy-key.pem scheduler.pem
admin.pem ca.pem front-proxy-ca.pem kube-proxy.pem
apiserver.csr controller-manager.csr front-proxy-client.csr sa.key
apiserver-key.pem controller-manager-key.pem front-proxy-client-key.pem sa.pub
apiserver.pem controller-manager.pem front-proxy-client.pem scheduler.csr
# 一共26个就对了
ls /etc/kubernetes/pki/ |wc -l
265. k8s系统组件配置
5.1 etcd配置
5.1.1 master01配置
- k8s-master01操作
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.80.61:2380'
listen-client-urls: 'https://192.168.80.61:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.80.61:2380'
advertise-client-urls: 'https://192.168.80.61:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.80.61:2380,k8s-node01=https://192.168.80.64:2380,k8s-node02=https://192.168.80.65:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF5.1.2 node01配置
- k8s-node01操作
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-node01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.80.64:2380'
listen-client-urls: 'https://192.168.80.64:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.80.64:2380'
advertise-client-urls: 'https://192.168.80.64:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.80.61:2380,k8s-node01=https://192.168.80.64:2380,k8s-node02=https://192.168.80.65:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF5.1.3 node02配置
- k8s-node02操作
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-node02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.80.65:2380'
listen-client-urls: 'https://192.168.80.65:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.80.65:2380'
advertise-client-urls: 'https://192.168.80.65:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.80.61:2380,k8s-node01=https://192.168.80.64:2380,k8s-node02=https://192.168.80.65:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF5.2 创建service
- k8s-master01操作
5.2.1 创建etcd.service并启动
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF5.2.2 其他etcd节点复制二进制文件
ETCD="k8s-node01 k8s-node02"
for NODE in $ETCD;
do
scp /usr/local/bin/etcd root@$NODE:/usr/local/bin/etcd
done5.2.3 创建etcd证书目录
mkdir -p /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd
systemctl restart etcd3.service5.2.4 查看etcd状态
# 如果要用IPv6那么把IPv4地址修改为IPv6即可
export ETCDCTL_API=3
etcdctl --endpoints="192.168.80.61:2379,192.168.80.64:2379,192.168.80.65:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.80.61:2379 | 602a829d2119d074 | 3.5.4 | 20 kB | false | false | 3 | 12 | 12 | |
| 192.168.80.64:2379 | 1de61889ab854b65 | 3.5.4 | 20 kB | true | false | 3 | 12 | 12 | |
| 192.168.80.65:2379 | 3a43ac97176c28c6 | 3.5.4 | 20 kB | false | false | 3 | 12 | 12 | |
+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+6. k8s组件配置
- 所有k8s节点创建以下目录
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes6.1 创建apiserver（所有master节点）
6.1.1 master01节点配置
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--logtostderr=true \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.80.61 \\
--service-cluster-ip-range=10.96.0.0/12 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.80.61:2379,https://192.168.80.64:2379,https://192.168.80.65:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
# --feature-gates=IPv6DualStack=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF6.1.2 启动apiserver（所有master节点）
systemctl daemon-reload && systemctl enable --now kube-apiserver
# 注意查看状态是否启动正常
# systemctl status kube-apiserver6.2.配置kube-controller-manager service
# 所有master节点配置，且配置相同
# 172.16.0.0/12为pod网段，按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \\
--v=2 \\
--logtostderr=true \\
--bind-address=127.0.0.1 \\
--root-ca-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \\
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \\
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \\
--leader-elect=true \\
--use-service-account-credentials=true \\
--node-monitor-grace-period=40s \\
--node-monitor-period=5s \\
--pod-eviction-timeout=2m0s \\
--controllers=*,bootstrapsigner,tokencleaner \\
--allocate-node-cidrs=true \\
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \\
--cluster-cidr=172.16.0.0/12,fc00::/48 \\
--node-cidr-mask-size-ipv4=24 \\
--node-cidr-mask-size-ipv6=64 \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
# --feature-gates=IPv6DualStack=true
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF6.2.1启动kube-controller-manager，并查看状态
systemctl daemon-reload
systemctl enable --now kube-controller-manager
# systemctl status kube-controller-manager6.3.配置kube-scheduler service
6.3.1所有master节点配置，且配置相同
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler \\
--v=2 \\
--logtostderr=true \\
--bind-address=127.0.0.1 \\
--leader-elect=true \\
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF6.3.2启动并查看服务状态
systemctl daemon-reload
systemctl enable --now kube-scheduler
# systemctl status kube-scheduler7.TLS Bootstrapping配置
7.1在master01上配置
cd bootstrap
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true --server=https://192.168.80.61:6443 \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user \
--token=c8ad9c.2e4d610cf3e7426e \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes \
--cluster=kubernetes \
--user=tls-bootstrap-token-user \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
# token的位置在bootstrap.secret.yaml，如果修改的话到这个文件修改 /root/bootstrap/bootstrap.secret.yaml
mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config7.2 查看集群状态，没问题的话继续后续操作
kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-1 Healthy {"health":"true","reason":""}
etcd-2 Healthy {"health":"true","reason":""}
etcd-0 Healthy {"health":"true","reason":""}
kubectl create -f /root/bootstrap/bootstrap.secret.yaml8.node节点配置
8.1 在master01上将证书复制到node节点
- k8s-master01操作
cd /etc/kubernetes/
for NODE in k8s-node01 k8s-node02; do ssh $NODE mkdir -p /etc/kubernetes/pki; for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig kube-proxy.kubeconfig; do scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}; done; done8.2 kubelet配置
8.2.1 当使用Containerd作为Runtime （推荐）
- k8s-master01、k8s-node01、k8s-node02操作
mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/
# 所有k8s节点配置kubelet service
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet \\
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
--config=/etc/kubernetes/kubelet-conf.yml \\
--container-runtime-endpoint=unix:///run/containerd/containerd.sock \\
--node-labels=node.kubernetes.io/node=
# --feature-gates=IPv6DualStack=true
# --container-runtime=remote
# --runtime-request-timeout=15m
# --cgroup-driver=systemd
[Install]
WantedBy=multi-user.target
EOF8.2.2 所有k8s节点创建kubelet的配置文件
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF8.2.3启动kubelet
systemctl daemon-reload
systemctl restart kubelet
systemctl enable --now kubelet
# systemctl status kubelet.service8.2.4查看集群
kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready <none> 6h17m v1.25.0
k8s-master02 Ready <none> 6h16m v1.25.0
k8s-master03 Ready <none> 6h16m v1.25.0
k8s-node01 Ready <none> 6h20m v1.25.0
k8s-node02 Ready <none> 6h18m v1.25.08.3 kube-proxy配置
8.3.1将kubeconfig发送至其他节点
for NODE in k8s-node01 k8s-node02; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done8.3.2所有k8s节点添加kube-proxy的service文件
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-proxy \\
--config=/etc/kubernetes/kube-proxy.yaml \\
--v=2
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF8.3.3所有k8s节点添加kube-proxy的配置
cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
acceptContentTypes: ""
burst: 10
contentType: application/vnd.kubernetes.protobuf
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
qps: 5
clusterCIDR: 172.16.0.0/12,fc00::/48
configSyncPeriod: 15m0s
conntrack:
max: null
maxPerCore: 32768
min: 131072
tcpCloseWaitTimeout: 1h0m0s
tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
masqueradeAll: false
masqueradeBit: 14
minSyncPeriod: 0s
syncPeriod: 30s
ipvs:
masqueradeAll: true
minSyncPeriod: 5s
scheduler: "rr"
syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF8.3.4启动kube-proxy
systemctl daemon-reload
systemctl restart kube-proxy
systemctl enable --now kube-proxy
# systemctl status kube-proxy.service9.安装网络插件
cilium 暂时不支持IPv4 IPv6双栈
9.1安装Calico
https://projectcalico.docs.tigera.io/archive/v3.23/getting-started/kubernetes/
https://github.com/projectcalico/calico
mkdir -p $HOME/k8s-install/network && cd $HOME/k8s-install/network
# 1. 下载插件
wget -P $HOME/k8s-install/network/ https://docs.projectcalico.org/manifests/calico.yaml
# CIDR的值，与 kube-controller-manager中“--cluster-cidr=172.16.0.0/12” 一致
vi calico.yaml
4548 # The default IPv4 pool to create on startup if none exists. Pod IPs will be
4549 # chosen from this range. Changing this value after installation will have
4550 # no effect. This should fall within `--cluster-cidr`.
4551 - name: CALICO_IPV4POOL_CIDR
4552 value: "172.16.0.0/12"
# 2. 安装网络插件
kubectl apply -f calico.yaml
# 3. 查看情况
kubectl get pod -n kube-system -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-kube-controllers-f79f7749d-kkgmw 1/1 Running 0 39m 10.88.0.2 k8s-master01 <none> <none>
calico-node-9tgg6 1/1 Running 0 39m 192.168.80.61 k8s-master01 <none> <none>
calico-node-ppgl6 1/1 Running 0 39m 192.168.80.64 k8s-node01 <none> <none>
calico-node-qb7ns 1/1 Running 0 39m 192.168.80.65 k8s-node02 <none> <none>
# 4. 查看集群
kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready <none> 59m v1.25.0
k8s-node01 Ready <none> 60m v1.25.0
k8s-node02 Ready <none> 60m v1.25.09.2安装cilium
9.2.1 安装helm
https://mirrors.huaweicloud.com/helm/
# 1. 官网下载网络太慢
# [root@k8s-master01 ~]# curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
# [root@k8s-master01 ~]# chmod 700 get_helm.sh
# [root@k8s-master01 ~]# ./get_helm.sh
# 2. 华为云
wget https://mirrors.huaweicloud.com/helm/v3.9.4/helm-v3.9.4-linux-amd64.tar.gz
tar zxvf helm-v3.9.4-linux-amd64.tar.gz
cp linux-amd64/helm /usr/local/bin/
helm version
# version.BuildInfo{Version:"v3.9.4", GitCommit:"dbc6d8e20fe1d58d50e6ed30f09a04a77e4c68db", GitTreeState:"clean", GoVersion:"go1.17.13"}9.2.2 安装cilium
[root@k8s-master01 ~]# helm repo add cilium https://helm.cilium.io
[root@k8s-master01 ~]# helm install cilium cilium/cilium --namespace kube-system --set hubble.relay.enabled=true --set hubble.ui.enabled=true --set prometheus.enabled=true --set operator.prometheus.enabled=true --set hubble.enabled=true --set hubble.metrics.enabled="{dns,drop,tcp,flow,port-distribution,icmp,http}"
NAME: cilium
LAST DEPLOYED: Sun Sep 11 00:04:30 2022
NAMESPACE: kube-system
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
You have successfully installed Cilium with Hubble.
Your release version is 1.12.1.
For any further help, visit https://docs.cilium.io/en/v1.12/gettinghelp
[root@k8s-master01 ~]#9.2.3 查看
[root@k8s-master01 ~]# kubectl get pod -A | grep cil
kube-system cilium-gmr6c 1/1 Running 0 5m3s
kube-system cilium-kzgdj 1/1 Running 0 5m3s
kube-system cilium-operator-69b677f97c-6pw4k 1/1 Running 0 5m3s
kube-system cilium-operator-69b677f97c-xzzdk 1/1 Running 0 5m3s
kube-system cilium-q2rnr 1/1 Running 0 5m3s
kube-system cilium-smx5v 1/1 Running 0 5m3s
kube-system cilium-tdjq4 1/1 Running 0 5m3s
[root@k8s-master01 ~]#9.2.4 下载专属监控面板
[root@k8s-master01 yaml]# wget https://raw.githubusercontent.com/cilium/cilium/1.12.1/examples/kubernetes/addons/prometheus/monitoring-example.yaml
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl apply -f monitoring-example.yaml
namespace/cilium-monitoring created
serviceaccount/prometheus-k8s created
configmap/grafana-config created
configmap/grafana-cilium-dashboard created
configmap/grafana-cilium-operator-dashboard created
configmap/grafana-hubble-dashboard created
configmap/prometheus created
clusterrole.rbac.authorization.k8s.io/prometheus created
clusterrolebinding.rbac.authorization.k8s.io/prometheus created
service/grafana created
service/prometheus created
deployment.apps/grafana created
deployment.apps/prometheus created
[root@k8s-master01 yaml]#9.2.5 下载部署测试用例
[root@k8s-master01 yaml]# wget https://raw.githubusercontent.com/cilium/cilium/master/examples/kubernetes/connectivity-check/connectivity-check.yaml
[root@k8s-master01 yaml]# sed -i "s#google.com#oiox.cn#g" connectivity-check.yaml
[root@k8s-master01 yaml]# kubectl apply -f connectivity-check.yaml
deployment.apps/echo-a created
deployment.apps/echo-b created
deployment.apps/echo-b-host created
deployment.apps/pod-to-a created
deployment.apps/pod-to-external-1111 created
deployment.apps/pod-to-a-denied-cnp created
deployment.apps/pod-to-a-allowed-cnp created
deployment.apps/pod-to-external-fqdn-allow-google-cnp created
deployment.apps/pod-to-b-multi-node-clusterip created
deployment.apps/pod-to-b-multi-node-headless created
deployment.apps/host-to-b-multi-node-clusterip created
deployment.apps/host-to-b-multi-node-headless created
deployment.apps/pod-to-b-multi-node-nodeport created
deployment.apps/pod-to-b-intra-node-nodeport created
service/echo-a created
service/echo-b created
service/echo-b-headless created
service/echo-b-host-headless created
ciliumnetworkpolicy.cilium.io/pod-to-a-denied-cnp created
ciliumnetworkpolicy.cilium.io/pod-to-a-allowed-cnp created
ciliumnetworkpolicy.cilium.io/pod-to-external-fqdn-allow-google-cnp created
[root@k8s-master01 yaml]#9.2.6 查看pod
注：注意机器内存空间需要给大些。
[root@k8s-master01 yaml]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
cilium-monitoring grafana-59957b9549-6zzqh 1/1 Running 0 10m
cilium-monitoring prometheus-7c8c9684bb-4v9cl 1/1 Running 0 10m
default chenby-75b5d7fbfb-7zjsr 1/1 Running 0 27h
default chenby-75b5d7fbfb-hbvr8 1/1 Running 0 27h
default chenby-75b5d7fbfb-ppbzg 1/1 Running 0 27h
default echo-a-6799dff547-pnx6w 1/1 Running 0 10m
default echo-b-fc47b659c-4bdg9 1/1 Running 0 10m
default echo-b-host-67fcfd59b7-28r9s 1/1 Running 0 10m
default host-to-b-multi-node-clusterip-69c57975d6-z4j2z 1/1 Running 0 10m
default host-to-b-multi-node-headless-865899f7bb-frrmc 1/1 Running 0 10m
default pod-to-a-allowed-cnp-5f9d7d4b9d-hcd8x 1/1 Running 0 10m
default pod-to-a-denied-cnp-65cc5ff97b-2rzb8 1/1 Running 0 10m
default pod-to-a-dfc64f564-p7xcn 1/1 Running 0 10m
default pod-to-b-intra-node-nodeport-677868746b-trk2l 1/1 Running 0 10m
default pod-to-b-multi-node-clusterip-76bbbc677b-knfq2 1/1 Running 0 10m
default pod-to-b-multi-node-headless-698c6579fd-mmvd7 1/1 Running 0 10m
default pod-to-b-multi-node-nodeport-5dc4b8cfd6-8dxmz 1/1 Running 0 10m
default pod-to-external-1111-8459965778-pjt9b 1/1 Running 0 10m
default pod-to-external-fqdn-allow-google-cnp-64df9fb89b-l9l4q 1/1 Running 0 10m
kube-system cilium-7rfj6 1/1 Running 0 56s
kube-system cilium-d4cch 1/1 Running 0 56s
kube-system cilium-h5x8r 1/1 Running 0 56s
kube-system cilium-operator-5dbddb6dbf-flpl5 1/1 Running 0 56s
kube-system cilium-operator-5dbddb6dbf-gcznc 1/1 Running 0 56s
kube-system cilium-t2xlz 1/1 Running 0 56s
kube-system cilium-z65z7 1/1 Running 0 56s
kube-system coredns-665475b9f8-jkqn8 1/1 Running 1 (36h ago) 36h
kube-system hubble-relay-59d8575-9pl9z 1/1 Running 0 56s
kube-system hubble-ui-64d4995d57-nsv9j 2/2 Running 0 56s
kube-system metrics-server-776f58c94b-c6zgs 1/1 Running 1 (36h ago) 37h
[root@k8s-master01 yaml]#9.2.7 修改为NodePort
[root@k8s-master01 yaml]# kubectl edit svc -n kube-system hubble-ui
service/hubble-ui edited
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl edit svc -n cilium-monitoring grafana
service/grafana edited
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl edit svc -n cilium-monitoring prometheus
service/prometheus edited
[root@k8s-master01 yaml]#
type: NodePort9.2.8 查看端口
[root@k8s-master01 yaml]# kubectl get svc -A | grep monit
cilium-monitoring grafana NodePort 10.100.250.17 <none> 3000:30707/TCP 15m
cilium-monitoring prometheus NodePort 10.100.131.243 <none> 9090:31155/TCP 15m
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl get svc -A | grep hubble
kube-system hubble-metrics ClusterIP None <none> 9965/TCP 5m12s
kube-system hubble-peer ClusterIP 10.100.150.29 <none> 443/TCP 5m12s
kube-system hubble-relay ClusterIP 10.109.251.34 <none> 80/TCP 5m12s
kube-system hubble-ui NodePort 10.102.253.59 <none> 80:31219/TCP 5m12s
[root@k8s-master01 yaml]#9.2.9 访问
http://192.168.80.61:30707
http://192.168.80.61:31155
http://192.168.80.61:3121910.安装CoreDNS
https://github.com/coredns/deployment/tree/master/kubernetes
10.1以下步骤只在master01操作
10.1.1修改文件
# 下载文件
# wget https://storage.googleapis.com/kubernetes-the-hard-way/coredns.yaml
# 修改文件内容cluster ip
clusterIP: 10.96.0.10
# 启动文件
kubectl apply -f /root/coredns/coredns.yaml
# 查询状态
kubectl get pods -n kube-system | grep coredns
coredns-78cdc77856-9855b 1/1 Running 0 21mDNS问题排查：
# dns service
kubectl get svc -n kube-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 13m
# endpoints 是否正常
kubectl get endpoints kube-dns -n kube-system
NAME ENDPOINTS AGE
kube-dns 172.17.125.2:53,172.25.244.196:53,172.17.125.2:53 + 3 more... 10m
# coredns 增加解析日志
CoreDNS 配置参数说明：
errors: 输出错误信息到控制台。
health：CoreDNS 进行监控检测，检测地址为 http://localhost:8080/health 如果状态为不健康则让 Pod 进行重启。
ready: 全部插件已经加载完成时，将通过 endpoints 在 8081 端口返回 HTTP 状态 200。
kubernetes：CoreDNS 将根据 Kubernetes 服务和 pod 的 IP 回复 DNS 查询。
prometheus：是否开启 CoreDNS Metrics 信息接口，如果配置则开启，接口地址为 http://localhost:9153/metrics
forward：任何不在Kubernetes 集群内的域名查询将被转发到预定义的解析器 (/etc/resolv.conf)。
cache：启用缓存，30 秒 TTL。
loop：检测简单的转发循环，如果找到循环则停止 CoreDNS 进程。
reload：监听 CoreDNS 配置，如果配置发生变化则重新加载配置。
loadbalance：DNS 负载均衡器，默认 round_robin。
# 编辑 coredns 配置
kubectl edit configmap coredns -n kube-system
apiVersion: v1
data:
Corefile: |
.:53 {
log # new add
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
kind: ConfigMap
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","data":{"Corefile":".:53 {\n errors\n health {\n lameduck 5s\n }\n ready\n kubernetes cluster.local in-addr.arpa ip6.arpa {\n fallthrough in-addr.arpa ip6.arpa\n }\n prometheus :9153\n forward . /etc/resolv.conf {\n max_concurrent 1000\n }\n cache 30\n loop\n reload\n loadbalance\n}\n"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"coredns","namespace":"kube-system"}}
creationTimestamp: "2021-05-13T11:57:45Z"
name: coredns
namespace: kube-system
resourceVersion: "38460"
selfLink: /api/v1/namespaces/kube-system/configmaps/coredns
uid: c62a856d-1fc3-4fe9-b5f1-3ca0dbeb39c111.安装Metrics Server
11.1以下步骤只在master01操作
11.1.1安装Metrics-server
在新版的Kubernetes中系统资源的采集均使用Metrics-server，可以通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率
# 安装metrics server
kubectl apply -f /root/metrics-server/metrics-server/metrics-server.yaml
# 查看资源使用
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
k8s-master01 726m 36% 1186Mi 64%
k8s-node01 229m 11% 973Mi 52%
k8s-node02 215m 10% 973Mi 52%12.集群验证
12.1部署pod资源
cat<<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: docker.io/library/busybox:1.28
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
EOF
# 查看
kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 22m12.2用pod解析默认命名空间中的kubernetes
kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 140m
kubectl exec busybox -n default -- nslookup kubernetes
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local12.3测试跨命名空间是否可以解析
kubectl exec busybox -n default -- nslookup kube-dns.kube-system
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kube-dns.kube-system
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local12.4每个节点都必须要能访问Kubernetes的kubernetes svc 443和kube-dns的service 53
telnet 10.96.0.1 443
Trying 10.96.0.1...
Connected to 10.96.0.1.
Escape character is '^]'.
telnet 10.96.0.10 53
Trying 10.96.0.10...
Connected to 10.96.0.10.
Escape character is '^]'.
curl 10.96.0.10:53
curl: (52) Empty reply from server12.5Pod和Pod之前要能通
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
busybox 1/1 Running 0 27m 172.17.125.2 k8s-node01 <none> <none>
kubectl get po -n kube-system -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-kube-controllers-f79f7749d-kkgmw 1/1 Running 0 50m 10.88.0.2 k8s-master01 <none> <none>
calico-node-9tgg6 1/1 Running 0 50m 192.168.80.61 k8s-master01 <none> <none>
calico-node-ppgl6 1/1 Running 0 50m 192.168.80.64 k8s-node01 <none> <none>
calico-node-qb7ns 1/1 Running 0 50m 192.168.80.65 k8s-node02 <none> <none>
coredns-78cdc77856-9855b 1/1 Running 0 30m 172.27.14.193 k8s-node02 <none> <none>
metrics-server-6bbcb9f574-ncj9r 1/1 Running 0 29m 172.17.125.1 k8s-node01 <none> <none>
# 进入busybox ping其他节点上的pod
kubectl exec -ti busybox -- sh
/ # ping 192.168.80.64
PING 192.168.80.64 (192.168.80.64): 56 data bytes
64 bytes from 192.168.80.64: seq=0 ttl=64 time=0.443 ms
64 bytes from 192.168.80.64: seq=1 ttl=64 time=0.126 ms
64 bytes from 192.168.80.64: seq=2 ttl=64 time=0.170 ms12.6创建三个副本，可以看到3个副本分布在不同的节点上
cat > deployments.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: docker.io/library/nginx:1.14.2
ports:
- containerPort: 80
EOF
kubectl apply -f deployments.yaml
deployment.apps/nginx-deployment created
kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 29m
nginx-deployment-6ff84ff895-4ktgm 1/1 Running 0 27s
nginx-deployment-6ff84ff895-g6dms 1/1 Running 0 27s
nginx-deployment-6ff84ff895-v4v8p 1/1 Running 0 27s13. master集群高可用
13.1系统初始化
-
k8s-master02、k8s-master03操作
# 1. 修改主机名
hostnamectl set-hostname k8s-master02
hostnamectl set-hostname k8s-master03
# 2. 主机名解析
cat >> /etc/hosts <<EOF
192.168.80.61 k8s-master01
192.168.80.62 k8s-master02
192.168.80.63 k8s-master03
192.168.80.64 k8s-node01
192.168.80.65 k8s-node02
EOF
# 3. 禁用 swap
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
# 4. 将桥接的IPv4流量传递到iptables的链
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system
# 5. 域名解析
echo "nameserver 8.8.8.8" >> /etc/resolv.conf
# 6.进行实际同步（客户端）
apt install chrony -y
cat > /etc/chrony.conf << EOF
pool 192.168.80.61 iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
hwclock --systohc
date -R
timedatectl set-local-rtc yes
timedatectl
systemctl restart chrony.service
#使用客户端进行验证
chronyc sources -v
# 7. 日志目录
mkdir -p /var/log/kubernetes
# 8.配置ulimit
ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF
# 9.ipvsadm安装（lb除外）
apt-get install ipvsadm
cat >> /etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
systemctl restart systemd-modules-load.service
lsmod | grep -e ip_vs -e nf_conntrack
ip_vs_sh 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs 155648 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 139264 1 ip_vs
nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 2 nf_conntrack,ip_vs
# 10.修改内核参数 (lb除外)
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF
sysctl --system
# 11.命令补全
apt bash-completion -y
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc13.2 安装Containerd作为Runtime
13.2.1 master01操作
export master_other="k8s-master02 k8s-master03"
for HOST in $master_other;
do
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
ssh root@$HOST "mkdir -p /usr/local/bin/ && mkdir -p $HOME/k8s-install"
scp /opt/cni/bin $HOST:/opt/cni/bin
scp /usr/bin/crictl $HOST:/usr/bin/
# kubernetes-server-linux-amd64.tar.gz
scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $HOST:/usr/local/bin/
scp $HOME/k8s-install/cri-containerd-cni-1.6.8-linux-amd64.tar.gz $HOST:$HOME/k8s-install/
scp /usr/local/bin/kube{let,-proxy} $HOST:/usr/local/bin/
done
# etcd密钥
for NODE in $master_other; do ssh $NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}; done; done
# 其他master节点
mkdir /etc/kubernetes/pki/ -p
for NODE in $master_other; do for FILE in $(ls /etc/kubernetes/pki | grep -v etcd); do scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE}; done; for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}; done; done13.2.2 创建配置文件
#创建cni插件所需目录
mkdir -p /etc/cni/net.d
#解压
tar -xzf $HOME/k8s-install/cri-containerd-cni-1.6.8-linux-amd64.tar.gz -C /
#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF13.2.3 配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF13.2.4 加载模块
systemctl restart systemd-modules-load.service13.2.5 配置Containerd所需的内核
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 加载内核
sysctl --system13.2.6 创建Containerd的配置文件
# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml
# 修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup
sed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image
sed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
sed -i "s#config_path\ \=\ \"\"#config_path\ \=\ \"/etc/containerd/certs.d\"#g" /etc/containerd/config.toml
mkdir /etc/containerd/certs.d/docker.io -pv
cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://hub-mirror.c.163.com"]
capabilities = ["pull", "resolve"]
EOF13.2.7 启动并设置为开机启动
systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd13.2.8 配置crictl客户端连接的运行时位置
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
#测试
systemctl restart containerd
crictl info13.3 组件配置
13.3.1 k8s-master02创建apiserver
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--logtostderr=true \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.80.62 \\
--service-cluster-ip-range=10.96.0.0/12 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.80.61:2379,https://192.168.80.64:2379,https://192.168.80.65:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
# --feature-gates=IPv6DualStack=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF13.3.2 k8s-master03创建apiserver
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--logtostderr=true \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.80.63 \\
--service-cluster-ip-range=10.96.0.0/12 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.80.61:2379,https://192.168.80.64:2379,https://192.168.80.65:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
# --feature-gates=IPv6DualStack=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF13.3.3 启动apiserver
systemctl daemon-reload && systemctl enable --now kube-apiserver
# 注意查看状态是否启动正常
# systemctl status kube-apiserver13.3.4 配置kube-controller-manager service
- k8s-master02、k8s-master03操作
# 所有master节点配置，且配置相同
# 172.16.0.0/12为pod网段，按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \\
--v=2 \\
--logtostderr=true \\
--bind-address=127.0.0.1 \\
--root-ca-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \\
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \\
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \\
--leader-elect=true \\
--use-service-account-credentials=true \\
--node-monitor-grace-period=40s \\
--node-monitor-period=5s \\
--pod-eviction-timeout=2m0s \\
--controllers=*,bootstrapsigner,tokencleaner \\
--allocate-node-cidrs=true \\
--service-cluster-ip-range=10.96.0.0/12,fd00::/108 \\
--cluster-cidr=172.16.0.0/12,fc00::/48 \\
--node-cidr-mask-size-ipv4=24 \\
--node-cidr-mask-size-ipv6=64 \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
# --feature-gates=IPv6DualStack=true
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable --now kube-controller-manager
# systemctl status kube-controller-manager13.3.5 配置kube-scheduler service
- k8s-master02、k8s-master03操作
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler \\
--v=2 \\
--logtostderr=true \\
--bind-address=127.0.0.1 \\
--leader-elect=true \\
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF13.3.6 启动并查看服务状态
systemctl daemon-reload
systemctl enable --now kube-scheduler
# systemctl status kube-scheduler复制证书：
cd /etc/kubernetes/
for NODE in k8s-master02 k8s-master03; do ssh $NODE mkdir -p /etc/kubernetes/pki; for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig kube-proxy.kubeconfig; do scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}; done; done13.3.7 kubelet配置，Containerd作为Runtime
mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/
# 所有k8s节点配置kubelet service
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet \\
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
--config=/etc/kubernetes/kubelet-conf.yml \\
--container-runtime-endpoint=unix:///run/containerd/containerd.sock \\
--node-labels=node.kubernetes.io/node=
# --feature-gates=IPv6DualStack=true
# --container-runtime=remote
# --runtime-request-timeout=15m
# --cgroup-driver=systemd
[Install]
WantedBy=multi-user.target
EOF13.3.8 所有k8s节点创建kubelet的配置文件
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF13.3.9 启动kubelet
systemctl daemon-reload
systemctl restart kubelet
systemctl enable --now kubelet
# systemctl status kubelet.service13.3.10 查看集群
kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready <none> 21h v1.25.0
k8s-master02 Ready <none> 113s v1.25.0
k8s-master03 Ready <none> 38s v1.25.0
k8s-node01 Ready <none> 21h v1.25.0
k8s-node02 Ready <none> 21h v1.25.013.3.11 kube-proxy配置
for NODE in k8s-master02 k8s-master03; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done
# 添加kube-proxy的service文件
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-proxy \\
--config=/etc/kubernetes/kube-proxy.yaml \\
--v=2
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
# 添加kube-proxy的配置
cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
acceptContentTypes: ""
burst: 10
contentType: application/vnd.kubernetes.protobuf
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
qps: 5
clusterCIDR: 172.16.0.0/12,fc00::/48
configSyncPeriod: 15m0s
conntrack:
max: null
maxPerCore: 32768
min: 131072
tcpCloseWaitTimeout: 1h0m0s
tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
masqueradeAll: false
masqueradeBit: 14
minSyncPeriod: 0s
syncPeriod: 30s
ipvs:
masqueradeAll: true
minSyncPeriod: 5s
scheduler: "rr"
syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF
# 启动kube-proxy
systemctl daemon-reload
systemctl restart kube-proxy
systemctl enable --now kube-proxy
# systemctl status kube-proxy.service14. 高可用配置
主要规划：master01、master02、master03 安装 keepalived 服务，虚拟vip：192.168.80.66 端口为8443，此前公钥中已经加入了192.168.80.66地址。haproxy 是 k8s-master01和 k8s-master02 安装。
14.1 安装keepalived和haproxy服务
apt install keepalived haproxy -y14.2 修改haproxy配置文件（两台配置文件一样）
- k8s-master01、k8s-master02操作
# cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bak
cat >/etc/haproxy/haproxy.cfg<<"EOF"
global
maxconn 2000
ulimit-n 16384
log 127.0.0.1 local0 err
stats timeout 30s
defaults
log global
mode http
option httplog
timeout connect 5000
timeout client 50000
timeout server 50000
timeout http-request 15s
timeout http-keep-alive 15s
frontend monitor-in
bind *:33305
mode http
option httplog
monitor-uri /monitor
frontend k8s-master
bind 0.0.0.0:8443
bind 127.0.0.1:8443
mode tcp
option tcplog
tcp-request inspect-delay 5s
default_backend k8s-master
backend k8s-master
mode tcp
option tcplog
option tcp-check
balance roundrobin
default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
server k8s-master01 192.168.80.61:6443 check
server k8s-master02 192.168.80.62:6443 check
server k8s-master03 192.168.80.63:6443 check
EOF14.3 Master01配置keepalived master节点
#cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
# 注意网卡名
interface ens33
mcast_src_ip 192.168.80.61
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.80.66
}
track_script {
chk_apiserver
} }
EOF14.4 Master02配置keepalived backup节点
# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
# 注意网卡名
interface ens33
mcast_src_ip 192.168.80.62
virtual_router_id 51
priority 80
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.80.66
}
track_script {
chk_apiserver
} }
EOF14.5 Master03配置keepalived backup节点
# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
# 注意网卡名
interface ens33
mcast_src_ip 192.168.80.63
virtual_router_id 51
priority 50
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.80.66
}
track_script {
chk_apiserver
} }
EOF14.6 健康检查脚本配置（两台lb主机）
cat > /etc/keepalived/check_apiserver.sh << EOF
#!/bin/bash
err=0
for k in \$(seq 1 3)
do
check_code=\$(pgrep haproxy)
if [[ \$check_code == "" ]]; then
err=\$(expr \$err + 1)
sleep 1
continue
else
err=0
break
fi
done
if [[ \$err != "0" ]]; then
echo "systemctl stop keepalived"
/usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
EOF
# 给脚本授权
chmod +x /etc/keepalived/check_apiserver.sh
sudo useradd keepalived_script
sudo passwd keepalived_script
sudo chown -R keepalived_script:keepalived_script /etc/keepalived/check_apiserver.sh14.7 启动服务
systemctl daemon-reload
systemctl enable --now haproxy
systemctl enable --now keepalived
systemctl start haproxy
systemctl start keepalived
# systemctl status haproxy
# systemctl status keepalived14.8 测试高可用
# 能ping同
ping 192.168.80.66
netstat -lntup | grep 8443
# 能telnet访问
telnet 192.168.80.66 8443
# 关闭主节点，看vip是否漂移到备节点14.9 替换所有节点配置文件
# 批量替换
sed -i 's#192.168.80.61:6443#192.168.80.66:8443#' /etc/kubernetes/*
sed -i 's#192.168.80.61:6443#192.168.80.66:8443#' /etc/kubernetes/pki/*
grep -nr '192.168.80.' /etc/kubernetes/*
systemctl restart kubelet kube-proxy
# systemctl status kubelet kube-proxy
kubectl get node15. 打标和污点
# 标签
kubectl label node k8s-master01 k8s-master02 k8s-master03 node-role.kubernetes.io/master=
kubectl label node k8s-node01 k8s-node02 node-role.kubernetes.io/node=
# 污点
kubectl taint nodes k8s-master01 k8s-master02 k8s-master03 node-role.kubernetes.io/master=:NoSchedule16.
# 1. k8s-master02 上，停止kubelet进程
systemctl stop kubelet
# 2. 检查 k8s-master02 是否已下线
kubectl get nodes
# 3. 删除节点
kubectl drain k8s-master02
# 4.强制下线
kubectl drain k8s-master02 --ignore-daemonsets
# 5. 下线状态
kubectl get nodes
# 6. 恢复操作 (如有必要)
kubectl uncordon k8s-master02
# 7. 彻底删除
kubectl delete node k8s-master02
