二进制安装kubernetes1.16.10
服务器规划
| 主机名 |
IP |
组件名 |
| k8s01 |
192.168.10.91 |
kube-apiserver、kube-controller-manager、kube-scheduler、etcd |
| k8s02 |
192.168.10.92 |
kubelet、kube-proxy、docker、etcd |
| k8s03 |
192.168.10.93 |
kubelet、kube-proxy、docker、etcd |
部署etcd
生成etcd证书
#安装及插件CFSSL
curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl*
创建etcd相关证书
#创建目录
mkdir /opt/ssl_config/etcd -p
cd /opt/ssl_config/etcd/
etcd证书ca配置
cat <<EOF|tee ca-config.json
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
创建ca-csr配置
cat <<EOF|tee ca-csr.json
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
创建 etcd Server 证书
cat <<EOF|tee server-csr.json
{
"CN": "etcd",
"hosts": [
"192.168.10.91",
"192.168.10.92",
"192.168.10.93"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing"
}
]
}
EOF
生成 ETCD CA 证书和私钥
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
部署etcd
下载软件
#软件下载
wget https://github.com/etcd-io/etcd/releases/download/v3.3.22/etcd-v3.3.22-linux-amd64.tar.gz
tar xf etcd-v3.3.22-linux-amd64.tar.gz
编辑etcd配置文件
mkdir -p /opt/etcd/{bin,cfg,ssl}
cp etcd-v3.3.22-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
cat <<EOF |tee /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.10.91:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.10.91:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.10.91:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.10.91:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.10.91:2380,etcd-2=https://192.168.10.92:2380,etcd-3=https://192.168.10.93:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
配置证书文件
cd /opt/ssl_config/etcd/
cp *.pem /opt/etcd/ssl/
创建 etcd的 启动 文件
vim /etc/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--name=${ETCD_NAME} \
--data-dir=${ETCD_DATA_DIR} \
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--initial-cluster=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} \
--initial-cluster-state=new \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
配置文件拷贝到 节点1、节点2
rsync -azv etcd root@192.168.10.92:/opt/
rsync -azv /etc/systemd/system/etcd.service root@192.168.10.92:/etc/systemd/system/etcd.service
sed -i 's#ETCD_NAME=\"etcd-1#ETCD_NAME=\"etcd-2#g' /opt/etcd/cfg/etcd.conf
sed -i 's#URLS=\"https://192.168.10.91#URLS=\"https://192.168.10.92#g' /opt/etcd/cfg/etcd.conf
rsync -azv etcd root@192.168.10.93:/opt/
rsync -azv /etc/systemd/system/etcd.service root@192.168.10.93:/etc/systemd/system/etcd.service
sed -i 's#ETCD_NAME=\"etcd-1#ETCD_NAME=\"etcd-3#g' /opt/etcd/cfg/etcd.conf
sed -i 's#URLS=\"https://192.168.10.91#URLS=\"https://192.168.10.93#g' /opt/etcd/cfg/etcd.conf
启动ETCD服务
systemctl daemon-reload
systemctl start etcd
systemctl enable etcd
检查服务是否正常
etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.10.91:2379,https://192.168.10.92:2379,https://192.168.10.93:2379" cluster-health
member 675d9d912b71a976 is healthy: got healthy result from https://192.168.10.93:2379
member 8031e45f5ff71d02 is healthy: got healthy result from https://192.168.10.92:2379
member 9e07fded8a2b9058 is healthy: got healthy result from https://192.168.10.91:2379
cluster is healthy
部署Master Node
创建 Kubernetes 相关证书
mkdir -p /opt/ssl_config/kubernetes
cd /opt/ssl_config/kubernetes
kubernetes 证书ca配置
cat << EOF | tee ca-config.json
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"kubernetes": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
创建ca-csr证书配置
cat << EOF | tee ca-csr.json
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
生成api-server证书
cat << EOF | tee server-csr.json
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local",
"192.168.10.91",
"192.168.10.92",
"192.168.10.93"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
创建kube-proxy-csr证书
cat << EOF | tee kube-proxy-csr.json
{
"CN": "system:kube-proxy",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
生成 K8S CA证书和私钥
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
配置master节点配置文件
wget https://dl.k8s.io/v1.16.10/kubernetes-server-linux-amd64.tar.gz
tar xf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin/
mkdir /opt/kubernetes/{bin,cfg,ssl,logs} -p
cp kube-apiserver kube-controller-manager kube-proxy kubectl /opt/kubernetes/bin/
cp /opt/ssl_config/kubernetes/*.pem /opt/kubernetes/ssl/
创建 TLS Bootstrapping Token
head -c 16 /dev/urandom | od -An -t x | tr -d ' '
658bca9454213b67c0ee76c3c9023ab5
vim /opt/kubernetes/cfg/token.csv
658bca9454213b67c0ee76c3c9023ab5,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
部署 kube-apiserver 组件
创建apiserver配置文件
cat /opt/kubernetes/cfg/kube-apiserver.conf
KUBE_APISERVER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--etcd-servers=https://192.168.10.91:2379,https://192.168.10.92:2379,https://192.168.10.93:2379 \
--bind-address=192.168.10.91 \
--secure-port=6443 \
--advertise-address=192.168.10.91 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth=true \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-32767 \
--kubelet-client-certificate=/opt/kubernetes/ssl/server.pem \
--kubelet-client-key=/opt/kubernetes/ssl/server-key.pem \
--tls-cert-file=/opt/kubernetes/ssl/server.pem \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem \
--audit-log-maxage=30 \
--audit-log-maxbackup=3 \
--audit-log-maxsize=100 \
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
创建 kube-apiserver 启动文件
cat /etc/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-apiserver.conf
ExecStart=/opt/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
部署kube-scheduler
创建kube-scheduler配置文件
cat /opt/kubernetes/cfg/kube-scheduler.conf
KUBE_SCHEDULER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect \
--master=127.0.0.1:8080 \
--address=127.0.0.1"
创建kube-scheduler启动文件
cat /etc/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-scheduler.conf
ExecStart=/opt/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
部署kube-controller-manager
创建kube-controller-manager配置文件
cat /opt/kubernetes/cfg/kube-controller-manager.conf
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect=true \
--master=127.0.0.1:8080 \
--address=127.0.0.1 \
--allocate-node-cidrs=true \
--cluster-cidr=10.244.0.0/16 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \
--root-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
--experimental-cluster-signing-duration=87600h0m0s"
创建kube-controller-manager启动文件
cat /etc/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/opt/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
启动服务
systemctl daemon-reload
systemctl start kube-apiserver.service
systemctl start kube-scheduler.service
systemctl start kube-controller-manager.service
kubelet-bootstrap授权
kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
部署node节点
mkdir -p /opt/kubernetes/{bin,cfg,logs,ssl}
#master节点
rsync -azv kubelet kube-proxy root@k8s02:/opt/kubernetes/bin/
创建 kubelet bootstrap.kubeconfig 文件
cat environment.sh
# 创建kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=658bca9454213b67c0ee76c3c9023ab5
KUBE_APISERVER="https://192.168.10.91:6443"
# 设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=./ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=bootstrap.kubeconfig
# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
--token=${BOOTSTRAP_TOKEN} \
--kubeconfig=bootstrap.kubeconfig
# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet-bootstrap \
--kubeconfig=bootstrap.kubeconfig
# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
#通过 bash environment.sh获取 bootstrap.kubeconfig 配置文件。
创建 kubelet.kubeconfig 文件
cat envkubelet.kubeconfig.sh
# 创建kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=658bca9454213b67c0ee76c3c9023ab5
KUBE_APISERVER="https://192.168.10.91:6443"
# 设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=./ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kubelet.kubeconfig
# 设置客户端认证参数
kubectl config set-credentials kubelet \
--token=${BOOTSTRAP_TOKEN} \
--kubeconfig=kubelet.kubeconfig
# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet \
--kubeconfig=kubelet.kubeconfig
# 设置默认上下文
kubectl config use-context default --kubeconfig=kubelet.kubeconfig
#通过 bash envkubelet.kubeconfig.sh获取 kubelet.kubeconfig 配置文件。
创建kube-proxy kubeconfig文件
cat env_proxy.sh
# 创建kube-proxy kubeconfig文件
BOOTSTRAP_TOKEN=658bca9454213b67c0ee76c3c9023ab5
KUBE_APISERVER="https://192.168.10.91:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=./ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=./kube-proxy.pem \
--client-key=./kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
#通过 bash env_proxy.sh获取 kube-proxy.kubeconfig 配置文件。
拷贝到node节点
rsync -azv bootstrap.kubeconfig kube-proxy.kubeconfig kubelet.kubeconfig root@k8s02:/opt/kubernetes/cfg/
rsync -azv ca.pem kube-proxy*.pem root@k8s02:/opt/kubernetes/ssl/
部署docker
wget https://download.docker.com/linux/static/stable/x86_64/docker-18.09.6.tgz
tar xf docker-18.09.6.tgz
cp docker/* /usr/bin/
配置镜像加速
mkdir -p /etc/docker/
cat /etc/docker/daemon.json
{
"registry-mirrors": ["http://bc437cce.m.daocloud.io"]
}
配置docker启动文件
cat /etc/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
[Service]
Type=notify
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
启动docker
systemctl daemon-reload
systemctl start docker
systemctl enable docker
部署kubelet组件
创建 kubelet 参数配置文件
cat /opt/kubernetes/cfg/kubelet-config.yml
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local
failSwapOn: false
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /opt/kubernetes/ssl/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110
创建kubelet配置文件
cat kubelet.conf
KUBELET_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--hostname-override=k8s02 \
--network-plugin=cni \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet-config.yml \
--cert-dir=/opt/kubernetes/ssl \
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
创建kubelet 启动文件
cat /etc/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Before=docker.service
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet.conf
ExecStart=/opt/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
部署kube-proxy 组件
创建kube-proxy 参数配置文件
cat kube-proxy-config.yml
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
address: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: k8s02
clusterCIDR: 10.0.0.0/24
mode: ipvs
ipvs:
scheduler: "rr"
iptables:
masqueradeAll: true
创建kube-proxy配置文件
cat kube-proxy.conf
KUBE_PROXY_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--config=/opt/kubernetes/cfg/kube-proxy-config.yml"
创建kube-proxy 启动文件
cat /etc/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-proxy.conf
ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
启动服务
systemctl daemon-reload
systemctl start kubelet
systemctl start kube-proxy
systemctl enable kubelet
systemctl enable kube-proxy
允许给Node颁发证书(masterj节点)
kubectl certificate approve node-csr-6LffhreJ_LWi5txpoiyU9nRhC-0XFi3yUkIt-UxZ-u4
kubectl certificate approve node-csr-rsgn02q-gZmhv4NHHRCwMrk0Sxj1wS0YFX0iW5Vn69c
[root@k8s01 kubernetes]# kubectl get csr
NAME AGE REQUESTOR CONDITION
node-csr-6LffhreJ_LWi5txpoiyU9nRhC-0XFi3yUkIt-UxZ-u4 74m kubelet-bootstrap Approved,Issued
node-csr-rsgn02q-gZmhv4NHHRCwMrk0Sxj1wS0YFX0iW5Vn69c 2m26s kubelet-bootstrap Approved,Issued
[root@k8s01 kubernetes]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s02 NotReady <none> 64m v1.16.10
k8s03 NotReady <none> 97s v1.16.10
[root@k8s01 kubernetes]#
部署CNI网络
wget https://github.com/containernetworking/plugins/releases/download/v0.8.6/cni-plugins-linux-amd64-v0.8.6.tgz
mkdir /opt/cni/bin /etc/cni/net.d -p
tar xf cni-plugins-linux-amd64-v0.8.6.tgz -C /opt/cni/bin/
kubelet启用CNI：
cat /opt/kubernetes/cfg/kubelet.conf
--network-plugin=cni
master执行
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml
kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-amd64-jtwwr 1/1 Running 0 7m13s
kube-flannel-ds-amd64-t7xsj 1/1 Running 0 10s
kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s02 Ready <none> 11h v1.16.10
k8s03 Ready <none> 10h v1.16.10
[root@k8s01 cfg]#
部署web UI
wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml
vi recommended.yaml
…
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
type: NodePort
ports:
- port: 443
targetPort: 8443
nodePort: 30001
selector:
k8s-app: kubernetes-dashboard
…
# kubectl apply -f recommended.yaml
#创建service account并绑定默认cluster-admin管理员集群角色：
cat dashboard-adminuser.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kubernetes-dashboard
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kubernetes-dashboard
#启动
apply -f dashboard-adminuser.yaml
#获取token
kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')
访问地址：http://NodeIP:30001
使用输出的token登录Dashboard。
部署DNS
集群内部是通过ClusterIP进行通讯，但是这个地址也不是固定的，在我们这里项目连接基础服务都是通过DNS名称去连接的，之前swarm的时候就说过，Swarm是自带DNS模块的，在早期的版本用的是kube-dns，但是设计的很复杂，不容器维护，现在默认DNS是coredns
cat coredns.yaml
# Warning: This is a file generated from the base underscore template file: coredns.yaml.base
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
labels:
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: Reconcile
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
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
addonmanager.kubernetes.io/mode: EnsureExists
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
labels:
addonmanager.kubernetes.io/mode: EnsureExists
data:
Corefile: |
.:53 {
errors
health
kubernetes cluster.local in-addr.arpa ip6.arpa {
pods insecure
upstream
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
proxy . /etc/resolv.conf
cache 30
loop
reload
loadbalance
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
kubernetes.io/name: "CoreDNS"
spec:
# replicas: not specified here:
# 1. In order to make Addon Manager do not reconcile this replicas parameter.
# 2. Default is 1.
# 3. 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
annotations:
seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
spec:
serviceAccountName: coredns
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
- key: "CriticalAddonsOnly"
operator: "Exists"
containers:
- name: coredns
image: lizhenliang/coredns:1.2.2
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
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
securityContext:
allowPrivilegeEscalation: false
capabilities:
add:
- NET_BIND_SERVICE
drop:
- all
readOnlyRootFilesystem: true
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"
addonmanager.kubernetes.io/mode: Reconcile
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.0.0.2
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
kubectl apply –f coredns.yaml
kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-6d8cfdd59d-rk664 1/1 Running 0 31s
kube-flannel-ds-amd64-jtwwr 1/1 Running 0 63m
kube-flannel-ds-amd64-t7xsj 1/1 Running 0 56m
Master高可用
| 主机名 |
IP |
组件名 |
| k8s01 |
192.168.10.91 |
kube-apiserver、kube-controller-manager、kube-scheduler、etcd |
| k8s02 |
192.168.10.92 |
kubelet、kube-proxy、docker、etcd |
| k8s03 |
192.168.10.93 |
kubelet、kube-proxy、docker、etcd |
| k8s04 |
192.168.10.94 |
kube-apiserver、kube-controller-manager、kube-scheduler |
| lb01 |
192.168.10.5 |
nginx(四层负载)、keepalived |
| lb02 |
192.168.10.6 |
nginx(四层负载)、keepalived |
| vip |
192.168.10.4 |
|
#修改server-csr.json 证书
cat server-csr.json
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local",
"192.168.10.91",
"192.168.10.92",
"192.168.10.93",
"192.168.10.94",
"192.168.10.5",
"192.168.10.6",
"192.168.10.4"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
#生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
cp server*.pem /opt/kubernetes/ssl/
部署Master组件（k8s01一致）
rsync -azv kubernetes root@192.168.10.94:/opt/
rsync -azv /etc/systemd/system/kube-* root@192.168.10.94:/etc/systemd/system/
rsync -azv /opt/etcd/ssl/* root@192.168.10.94:/opt/etcd/ssl/
[root@k8s04 cfg]# vim kube-apiserver.conf
--bind-address=192.168.10.94 \
--secure-port=6443 \
--advertise-address=192.168.10.94 \
systemctl start kube-apiserver
systemctl start kube-controller-manager
systemctl start kube-scheduler
systemctl enable kube-apiserver
systemctl enable kube-controller-manager
systemctl enable kube-scheduler
kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s02 Ready <none> 14h v1.16.10
k8s03 Ready <none> 13h v1.16.10
查看master集群状态
kubectl get cs -o=go-template='{{printf "|NAME|STATUS|MESSAGE|\n"}}{{range .items}}{{$name := .metadata.name}}{{range .conditions}}{{printf "|%s|%s|%s|\n" $name .status .message}}{{end}}{{end}}'
|NAME|STATUS|MESSAGE|
|scheduler|True|ok|
|controller-manager|True|ok|
|etcd-0|True|{"health":"true"}|
|etcd-1|True|{"health":"true"}|
|etcd-2|True|{"health":"true"}|
部署Nginx+Keepalived高可用
cat >/etc/yum.repos.d/nginx.repo <<EOF
[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true
EOF
yum -y install nginx
cat > /etc/nginx/nginx.conf <<EOF
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
}
stream {
log_format main '$remote_addr - [$time_local] ' '$status ' '$upstream_addr';
upstream k8s-apiserver {
server 192.168.10.91:6443;
server 192.168.10.94:6443;
}
server {
listen 6443;
proxy_pass k8s-apiserver;
}
access_log /var/log/nginx/api-server.log main ;
}
EOF
yum -y install keepalived
mkdir /server/scripts -p
cat > /server/scripts/check_web.sh <<EOF
#!/bin/bash
num=`ps -ef | grep -c nginx`
if [ $num -lt 2 ];then
systemctl stop keepalived
fi
EOF
chmod +x /server/scripts/check_web.sh
#主
cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id lb01
}
vrrp_script check_web {
script "/server/scripts/check_web.sh"
interval 2
weight 2
}
vrrp_instance lb {
state MASTER
interface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.10.4/24
}
track_script {
check_web
}
}
#备
cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id lb02
}
vrrp_script check_web {
script "/server/scripts/check_web.sh"
interval 2
weight 2
}
vrrp_instance lb {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.10.4/24
}
track_script {
check_web
}
}
启动服务
systemctl start nginx
systemctl enable nginx
systemctl start keepalived.service
systemctl enable keepalived.service
测试vip是否正常
curl -k --header "Authorization: Bearer 658bca9454213b67c0ee76c3c9023ab5" https://192.168.10.4:6443/version
{
"major": "1",
"minor": "16",
"gitVersion": "v1.16.10",
"gitCommit": "f3add640dbcd4f3c33a7749f38baaac0b3fe810d",
"gitTreeState": "clean",
"buildDate": "2020-05-20T13:51:56Z",
"goVersion": "go1.13.9",
"compiler": "gc",
"platform": "linux/amd64"
}
将Node节点连接VIP
cd /opt/kubernetes/cfg/
sed -i 's#192.168.10.91#192.168.10.4#g' *
systemctl restart kubelet.service
systemctl restart kube-proxy.service
