linux运维、架构之路-Kubernetes离线集群部署-无坑

一、部署环境介绍

1、服务器规划

系统	IP地址	主机名	CPU	内存
CentOS 7.5	192.168.56.11	k8s-node1	2C	2G
CentOS 7.5	192.168.56.12	k8s-node2	2C	2G
CentOS 7.5	192.168.56.13	k8s-node3	2C	2G

2、Kubernetes 1.10.1包下载

官方地址：https://github.com/kubernetes/kubernetes/releases
网盘地址：https://pan.baidu.com/s/1sJgRhGWhvBDqFVVJbNvk-g 
提取码：nirh

所用到包的版本：

创建软件包存放目录

mkdir -p /opt/kubernetes/tools

解压下载好软件包

cd /opt/kubernetes/tools   #软件包上传放在此目录
tar zxf kubernetes.tar.gz 
tar zxf kubernetes-server-linux-amd64.tar.gz 
tar zxf kubernetes-client-linux-amd64.tar.gz
tar zxf kubernetes-node-linux-amd64.tar.gz

3、Kubernetes工作流程

4、Kubernetes环境初始化

①设置主机名

hostnamectl set-hostname k8s-node1
hostnamectl set-hostname k8s-node2
hostnamectl set-hostname k8s-node3

②设置/etc/hosts保证主机名能够解析

cat > /etc/hosts <<EOF
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.56.11 k8s-node1 k8s-node1
192.168.56.12 k8s-node2 k8s-node2
192.168.56.13 k8s-node3 k8s-node3
EOF

③关闭SELinux和防火墙

systemctl disable firewalld.service
systemctl stop firewalld.service
systemctl disable NetworkManager
#关闭selinux
sed -i 's#SELINUX=enforcing#SELINUX=disabled#' /etc/selinux/config
setenforce 0

④优化内核参数

cat > /etc/sysctl.conf <<EOF
# For more information, see sysctl.conf(5) and sysctl.d(5).
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

vm.swappiness = 0
net.ipv4.neigh.default.gc_stale_time=120
net.ipv4.ip_forward = 1

# see details in https://help.aliyun.com/knowledge_detail/39428.html
net.ipv4.conf.all.rp_filter=0
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.lo.arp_announce=2
net.ipv4.conf.all.arp_announce=2


# see details in https://help.aliyun.com/knowledge_detail/41334.html
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_synack_retries = 2
kernel.sysrq = 1

#iptables透明网桥的实现
# NOTE: kube-proxy 要求 NODE 节点操作系统中要具备 /sys/module/br_netfilter 文件，而且还要设置 bridge-nf-call-iptables=1，如果不满足要求，那么 kube-proxy 只是将检查信息记录到日志中，kube-proxy 仍然会正常运行，但是这样通过 Kube-proxy 设置的某些 iptables 规则就不会工作。

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-arptables = 1
EOF

sysctl -p  #内核参数生效

⑤设置部署节点到其它所有节点的SSH免密码登录

ssh-keygen -t rsa
ssh-copy-id k8s-node1
ssh-copy-id k8s-node2
ssh-copy-id k8s-node3

5、部署 Docker(所有节点)

①添加yum源安装Docker

cd /etc/yum.repos.d/ && wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce
systemctl start docker
systemctl enable docker

②统一创建安装所需目录(所有节点)

mkdir -p /opt/kubernetes/{cfg,bin,ssl,log}

二、安装证书工具CFSSL制作CA证书

如无特别说明，所有操作都在节点k8s-node1执行

1、下载CFSSL工具

cd /opt/kubernetes/tools/
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

2、初始化cfssl

cd /opt/kubernetes/ssl
cfssl print-defaults config > config.json
cfssl print-defaults csr > csr.json

3、生成CA文件的JSON配置文件

cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "8760h"
    },
    "profiles": {
      "kubernetes": {
        "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ],
        "expiry": "8760h"
      }
    }
  }
}
EOF

4、创建用来生成CA证书签名请求CSR的JSON配置文件

cat > ca-csr.json <<EOF
{
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

5、生成CA证书ca.pem和密钥ca-key.pem

cfssl gencert -initca ca-csr.json | cfssljson -bare ca

[root@k8s-node1 ssl]# ll
总用量 28
-rw-r--r-- 1 root root  291 10月 25 11:38 ca-config.json
-rw-r--r-- 1 root root 1001 10月 25 11:41 ca.csr
-rw-r--r-- 1 root root  208 10月 25 11:40 ca-csr.json
-rw------- 1 root root 1679 10月 25 11:41 ca-key.pem
-rw-r--r-- 1 root root 1359 10月 25 11:41 ca.pem
-rw-r--r-- 1 root root  567 10月 25 11:35 config.json
-rw-r--r-- 1 root root  287 10月 25 11:35 csr.json

6、分发CA证书到k8s-node1和k8s-node2节点

scp -rp /opt/kubernetes/ssl/ca.csr ca.pem ca-key.pem ca-config.json 192.168.56.12:/opt/kubernetes/ssl/
scp -rp /opt/kubernetes/ssl/ca.csr ca.pem ca-key.pem ca-config.json 192.168.56.13:/opt/kubernetes/ssl/

三、ETCD集群部署

1、下载分发ETCD软件包

cd /opt/kubernetes/tools
wget https://github.com/coreos/etcd/releases/download/v3.2.18/etcd-v3.2.18-linux-amd64.tar.gz
tar xf etcd-v3.2.18-linux-amd64.tar.gz
cd etcd-v3.2.18-linux-amd64/ && cp etcd etcdctl /opt/kubernetes/bin/ 
scp etcd etcdctl 192.168.56.12:/opt/kubernetes/bin/
scp etcd etcdctl 192.168.56.13:/opt/kubernetes/bin/

配置环境变量

vim ~/.bash_profile

PATH=$PATH:$HOME/bin:/opt/kubernetes/bin

source ~/.bash_profile  #环境变量生效

2、创建 etcd 证书签名请求

红色部分改为自己集群的IP地址

cd /opt/kubernetes/ssl
cat > etcd-csr.json <<EOF
{
  "CN": "etcd",
  "hosts": [
    "127.0.0.1",
    "192.168.56.11",
    "192.168.56.12",
    "192.168.56.13"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

3、生成 etcd 证书和私钥

cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
  -ca-key=/opt/kubernetes/ssl/ca-key.pem \
  -config=/opt/kubernetes/ssl/ca-config.json \
  -profile=kubernetes etcd-csr.json | cfssljson -bare etcd

生成下面证书文件

[root@k8s-node1 ssl]# ls -l etcd*
-rw-r--r-- 1 root root 1062 10月 25 14:06 etcd.csr
-rw-r--r-- 1 root root  299 10月 25 14:00 etcd-csr.json
-rw------- 1 root root 1679 10月 25 14:06 etcd-key.pem
-rw-r--r-- 1 root root 1436 10月 25 14:06 etcd.pem

4、分发ETCD证书文件

scp /opt/kubernetes/ssl/etcd*.pem 192.168.56.12:/opt/kubernetes/ssl/
scp /opt/kubernetes/ssl/etcd*.pem 192.168.56.13:/opt/kubernetes/ssl/

5、设置ETCD配置文件

红色部分为分发配置文件到节点后需要修改的

cat > /opt/kubernetes/cfg/etcd.conf <<EOF
#[member]
ETCD_NAME="etcd-node1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_SNAPSHOT_COUNTER="10000"
#ETCD_HEARTBEAT_INTERVAL="100"
#ETCD_ELECTION_TIMEOUT="1000"
ETCD_LISTEN_PEER_URLS="https://192.168.56.11:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.56.11:2379,https://127.0.0.1:2379"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#[cluster]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.56.11:2380"
# if you use different ETCD_NAME (e.g. test),
# set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
ETCD_INITIAL_CLUSTER="etcd-node1=https://192.168.56.11:2380,etcd-node2=https://192.168.56.12:2380,etcd-node3=https://192.168.56.13:2380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="k8s-etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.56.11:2379"
#[security]
CLIENT_CERT_AUTH="true"
ETCD_CA_FILE="/opt/kubernetes/ssl/ca.pem"
ETCD_CERT_FILE="/opt/kubernetes/ssl/etcd.pem"
ETCD_KEY_FILE="/opt/kubernetes/ssl/etcd-key.pem"
PEER_CLIENT_CERT_AUTH="true"
ETCD_PEER_CA_FILE="/opt/kubernetes/ssl/ca.pem"
ETCD_PEER_CERT_FILE="/opt/kubernetes/ssl/etcd.pem"
ETCD_PEER_KEY_FILE="/opt/kubernetes/ssl/etcd-key.pem"
EOF

6、创建ETCD系统启动服务

mkdir /var/lib/etcd -p  #所有节点上创建etcd存储目录

cat > /etc/systemd/system/etcd.service <<EOF
[Unit]
Description=Etcd Server
After=network.target

[Service]
Type=simple
WorkingDirectory=/var/lib/etcd
EnvironmentFile=-/opt/kubernetes/cfg/etcd.conf
# set GOMAXPROCS to number of processors
ExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /opt/kubernetes/bin/etcd"
Type=notify

[Install]
WantedBy=multi-user.target
EOF

7、分发ETCD配置文件及系统服务文件

scp /opt/kubernetes/cfg/etcd.conf 192.168.56.12:/opt/kubernetes/cfg/      #etcd配置文件分发
scp /opt/kubernetes/cfg/etcd.conf 192.168.56.13:/opt/kubernetes/cfg/

scp /etc/systemd/system/etcd.service 192.168.56.12:/etc/systemd/system/   #etcd系统服务分发
scp /etc/systemd/system/etcd.service 192.168.56.13:/etc/systemd/system/

8、启动集群ETCD服务

systemctl daemon-reload
systemctl enable etcd
systemctl start etcd
systemctl status etcd

9、验证ETCD集群状态

etcdctl --endpoints=https://192.168.56.11:2379 \
  --ca-file=/opt/kubernetes/ssl/ca.pem \
  --cert-file=/opt/kubernetes/ssl/etcd.pem \
  --key-file=/opt/kubernetes/ssl/etcd-key.pem cluster-health

集群状态输出结果：

member 435fb0a8da627a4c is healthy: got healthy result from https://192.168.56.11:2379
member 6566e06d7343e1bb is healthy: got healthy result from https://192.168.56.11:2379
member ce7b884e428b6c8c is healthy: got healthy result from https://192.168.56.11:2379
cluster is healthy

四、Master节点服务部署

拷贝kube-apiserver、kube-controller-manager、kube-scheduler三个服务的命令到/opt/kubernetes/bin/

cd /opt/kubernetes/tools/kubernetes
cp server/bin/kube-apiserver /opt/kubernetes/bin/
cp server/bin/kube-controller-manager /opt/kubernetes/bin/
cp server/bin/kube-scheduler /opt/kubernetes/bin/

1、Kubernetes API服务部署

①创建生成CSR的JSON配置文件

cd /opt/kubernetes/ssl
cat > kubernetes-csr.json <<EOF
{
  "CN": "kubernetes",
  "hosts": [
    "127.0.0.1",
    "192.168.56.11",
    "10.1.0.1",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

②生成 kubernetes 证书和私钥

cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
   -ca-key=/opt/kubernetes/ssl/ca-key.pem \
   -config=/opt/kubernetes/ssl/ca-config.json \
   -profile=kubernetes kubernetes-csr.json | cfssljson -bare kubernetes

③证书分发

cp kubernetes*.pem /opt/kubernetes/ssl/
scp kubernetes*.pem 192.168.56.12:/opt/kubernetes/ssl/
scp kubernetes*.pem 192.168.56.13:/opt/kubernetes/ssl/

④创建 kube-apiserver使用的客户端token文件

head -c 16 /dev/urandom | od -An -t x | tr -d ' '
ad6d5bb607a186796d8861557df0d17f
cat > /opt/kubernetes/ssl/bootstrap-token.csv <<EOF
ad6d5bb607a186796d8861557df0d17f,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF

⑤创建基础用户名/密码认证配置

cat > /opt/kubernetes/ssl/basic-auth.csv <<EOF
admin,admin,1
readonly,readonly,2
EOF

⑥创建Kubernetes API Server系统服务文件

cat /usr/lib/systemd/system/kube-apiserver.service

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target

[Service]
ExecStart=/opt/kubernetes/bin/kube-apiserver \
  --admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota,NodeRestriction \
  --bind-address=192.168.56.11 \
  --insecure-bind-address=127.0.0.1 \
  --authorization-mode=Node,RBAC \
  --runtime-config=rbac.authorization.k8s.io/v1 \
  --kubelet-https=true \
  --anonymous-auth=false \
  --basic-auth-file=/opt/kubernetes/ssl/basic-auth.csv \
  --enable-bootstrap-token-auth \
  --token-auth-file=/opt/kubernetes/ssl/bootstrap-token.csv \
  --service-cluster-ip-range=10.1.0.0/16 \
  --service-node-port-range=20000-40000 \
  --tls-cert-file=/opt/kubernetes/ssl/kubernetes.pem \
  --tls-private-key-file=/opt/kubernetes/ssl/kubernetes-key.pem \
  --client-ca-file=/opt/kubernetes/ssl/ca.pem \
  --service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
  --etcd-cafile=/opt/kubernetes/ssl/ca.pem \
  --etcd-certfile=/opt/kubernetes/ssl/kubernetes.pem \
  --etcd-keyfile=/opt/kubernetes/ssl/kubernetes-key.pem \
  --etcd-servers=https://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379 \
  --enable-swagger-ui=true \
  --allow-privileged=true \
  --audit-log-maxage=30 \
  --audit-log-maxbackup=3 \
  --audit-log-maxsize=100 \
  --audit-log-path=/opt/kubernetes/log/api-audit.log \
  --event-ttl=1h \
  --v=2 \
  --logtostderr=false \
  --log-dir=/opt/kubernetes/log
Restart=on-failure
RestartSec=5
Type=notify
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

⑦启动API Server服务

systemctl daemon-reload
systemctl enable kube-apiserver
systemctl start kube-apiserver

2、部署Controller Manager服务

①创建Controller Manager系统服务文件

cat  /usr/lib/systemd/system/kube-controller-manager.service

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/GoogleCloudPlatform/kubernetes

[Service]
ExecStart=/opt/kubernetes/bin/kube-controller-manager \
  --address=127.0.0.1 \
  --master=http://127.0.0.1:8080 \
  --allocate-node-cidrs=true \
  --service-cluster-ip-range=10.1.0.0/16 \
  --cluster-cidr=10.2.0.0/16 \
  --cluster-name=kubernetes \
  --cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
  --cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \
  --service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
  --root-ca-file=/opt/kubernetes/ssl/ca.pem \
  --leader-elect=true \
  --v=2 \
  --logtostderr=false \
  --log-dir=/opt/kubernetes/log

Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

②启动Controller Manager

systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl start kube-controller-manager

3、部署Kubernetes Scheduler

①创建Kubernetes Scheduler系统服务文件

cat /usr/lib/systemd/system/kube-scheduler.service

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/GoogleCloudPlatform/kubernetes

[Service]
ExecStart=/opt/kubernetes/bin/kube-scheduler \
  --address=127.0.0.1 \
  --master=http://127.0.0.1:8080 \
  --leader-elect=true \
  --v=2 \
  --logtostderr=false \
  --log-dir=/opt/kubernetes/log

Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target

②启动Kubernetes Scheduler服务

systemctl daemon-reload
systemctl enable kube-scheduler
systemctl start kube-scheduler
systemctl status kube-scheduler

4、部署kubectl 命令行工具

①拷贝二进制命令

cp /opt/kubernetes/tools/kubernetes/client/bin/kubectl /opt/kubernetes/bin/

②创建 admin 证书签名请求

cd /opt/kubernetes/ssl

cat > admin-csr.json << EOF
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

③生成 admin 证书和私钥

cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
   -ca-key=/opt/kubernetes/ssl/ca-key.pem \
   -config=/opt/kubernetes/ssl/ca-config.json \
   -profile=kubernetes admin-csr.json | cfssljson -bare admin

生成如下文件：

[root@k8s-node1 ssl]# ls -l admin*
-rw-r--r-- 1 root root 1009 10月 25 15:42 admin.csr
-rw-r--r-- 1 root root  229 10月 25 15:41 admin-csr.json
-rw------- 1 root root 1675 10月 25 15:42 admin-key.pem
-rw-r--r-- 1 root root 1399 10月 25 15:42 admin.pem

④设置集群参数

kubectl config set-cluster kubernetes \
   --certificate-authority=/opt/kubernetes/ssl/ca.pem \
   --embed-certs=true \
   --server=https://192.168.56.11:6443

⑤设置客户端认证参数

kubectl config set-credentials admin \
   --client-certificate=/opt/kubernetes/ssl/admin.pem \
   --embed-certs=true \
   --client-key=/opt/kubernetes/ssl/admin-key.pem

⑥设置上下文参数

kubectl config set-context kubernetes \
   --cluster=kubernetes \
   --user=admin

⑦设置默认上下文参数

kubectl config use-context kubernetes

⑧使用kubectl工具查看集群节点

[root@k8s-node1 ssl]# kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
scheduler            Healthy   ok                   
controller-manager   Healthy   ok                   
etcd-0               Healthy   {"health": "true"}   
etcd-1               Healthy   {"health": "true"}   
etcd-2               Healthy   {"health": "true"}

五、Node节点部署

拷贝Node节点所用到的二进制包到集群节点

cd /opt/kubernetes/tools/kubernetes/server/bin
cp kubelet kube-proxy /opt/kubernetes/bin/
scp kubelet kube-proxy 192.168.56.12:/opt/kubernetes/bin/
scp kubelet kube-proxy 192.168.56.13:/opt/kubernetes/bin/

1、部署kubelet

①创建角色绑定

kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap

②创建kubelet bootstrapping kubeconfig文件，设置集群参数

kubectl config set-cluster kubernetes \
   --certificate-authority=/opt/kubernetes/ssl/ca.pem \
   --embed-certs=true \
   --server=https://192.168.56.11:6443 \
   --kubeconfig=bootstrap.kubeconfig

③设置客户端认证参数

kubectl config set-credentials kubelet-bootstrap \
   --token=ad6d5bb607a186796d8861557df0d17f \
   --kubeconfig=bootstrap.kubeconfig

④设置上下文参数

kubectl config set-context default \
   --cluster=kubernetes \
   --user=kubelet-bootstrap \
   --kubeconfig=bootstrap.kubeconfig

⑤选择默认上下文参数

kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

⑥分发生成的bootstrap.kubeconfig文件

cp bootstrap.kubeconfig /opt/kubernetes/cfg
scp bootstrap.kubeconfig 192.168.56.12:/opt/kubernetes/cfg
scp bootstrap.kubeconfig 192.168.56.13:/opt/kubernetes/cfg

⑦设置CNI支持kubelet-Node节点执行

mkdir -p /etc/cni/net.d

cat > /etc/cni/net.d/10-default.conf << EOF
{
        "name": "flannel",
        "type": "flannel",
        "delegate": {
            "bridge": "docker0",
            "isDefaultGateway": true,
            "mtu": 1400
        }
}
EOF

⑧创建kubelet系统服务文件

mkdir /var/lib/kubelet   #创建kubelet服务目录


cat /usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=docker.service
Requires=docker.service

[Service]
WorkingDirectory=/var/lib/kubelet
ExecStart=/opt/kubernetes/bin/kubelet \
  --address=192.168.56.11 \
  --hostname-override=192.168.56.11 \
  --pod-infra-container-image=mirrorgooglecontainers/pause-amd64:3.0 \
  --experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
  --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
  --cert-dir=/opt/kubernetes/ssl \
  --network-plugin=cni \
  --cni-conf-dir=/etc/cni/net.d \
  --cni-bin-dir=/opt/kubernetes/bin/cni \
  --cluster-dns=10.1.0.2 \
  --cluster-domain=cluster.local. \
  --hairpin-mode hairpin-veth \
  --allow-privileged=true \
  --fail-swap-on=false \
  --logtostderr=true \
  --v=2 \
  --logtostderr=false \
  --log-dir=/opt/kubernetes/log
Restart=on-failure
RestartSec=5

分发kubelet.service到Node节点，注意修改上图红色部分IP地址

scp /usr/lib/systemd/system/kubelet.service 192.168.56.12:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/kubelet.service 192.168.56.13:/usr/lib/systemd/system/

⑨启动kubelet服务

systemctl daemon-reload
systemctl enable kubelet
systemctl start kubelet

Master上面查看csr请求

[root@k8s-node1 ~]# kubectl get csr
NAME                                                   AGE       REQUESTOR           CONDITION
node-csr-JYT2V-hWMlex2hsYj913TgiXxBfKFKhoFX85VBwGOCQ   1m        kubelet-bootstrap   Pending
node-csr-VhlW-dP_O44Avewgz2A1zvV8vp3KSpIRMGFdjpE2RQk   1m        kubelet-bootstrap   Pending

允许kubelet 的TLS证书请求

kubectl get csr|grep 'Pending' | awk 'NR>0{print $1}'| xargs kubectl certificate approve

查看节点状态

[root@k8s-node1 ~]# kubectl get nodes
NAME            STATUS    ROLES     AGE       VERSION
192.168.56.12   Ready     <none>    37m       v1.10.1
192.168.56.13   Ready     <none>    37m       v1.10.1

2、部署Kubernetes Proxy服务

①配置kube-proxy使用LVS

yum install -y ipvsadm ipset conntrack

②创建 kube-proxy 证书请求

cd /opt/kubernetes/ssl/

cat > kube-proxy-csr.json <<EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

③生成证书

cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
   -ca-key=/opt/kubernetes/ssl/ca-key.pem \
   -config=/opt/kubernetes/ssl/ca-config.json \
   -profile=kubernetes  kube-proxy-csr.json | cfssljson -bare kube-proxy

④分发证书到Node节点

scp kube-proxy*.pem 192.168.56.12:/opt/kubernetes/ssl/
scp kube-proxy*.pem 192.168.56.13:/opt/kubernetes/ssl/

⑤创建kube-proxy配置文件

kubectl config set-cluster kubernetes \
   --certificate-authority=/opt/kubernetes/ssl/ca.pem \
   --embed-certs=true \
   --server=https://192.168.56.11:6443 \
   --kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \
   --client-certificate=/opt/kubernetes/ssl/kube-proxy.pem \
   --client-key=/opt/kubernetes/ssl/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

⑥分发kubeconfig配置文件

cp kube-proxy.kubeconfig /opt/kubernetes/cfg/
scp kube-proxy.kubeconfig 192.168.56.12:/opt/kubernetes/cfg/
scp kube-proxy.kubeconfig 192.168.56.13:/opt/kubernetes/cfg/

⑦创建kube-proxy系统服务文件

mkdir /var/lib/kube-proxy #创建kube-proxy服务目录

cat /usr/lib/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Kube-Proxy Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target

[Service]
WorkingDirectory=/var/lib/kube-proxy
ExecStart=/opt/kubernetes/bin/kube-proxy \
  --bind-address=192.168.56.11 \
  --hostname-override=192.168.56.11 \
  --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig \
--masquerade-all \
  --feature-gates=SupportIPVSProxyMode=true \
  --proxy-mode=ipvs \
  --ipvs-min-sync-period=5s \
  --ipvs-sync-period=5s \
  --ipvs-scheduler=rr \
  --logtostderr=true \
  --v=2 \
  --logtostderr=false \
  --log-dir=/opt/kubernetes/log

Restart=on-failure
RestartSec=5
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

⑧分发kube-proxy系统服务文件到Node节点

scp /usr/lib/systemd/system/kube-proxy.service 192.168.56.12:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/kube-proxy.service 192.168.56.13:/usr/lib/systemd/system/

⑨启动kube-proxy服务

systemctl daemon-reload
systemctl enable kube-proxy
systemctl start kube-proxy

Node节点查看LVS状态

[root@k8s-node2 ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.1.0.1:443 rr persistent 10800
  -> 192.168.56.11:6443           Masq    1      0          0

[root@k8s-node3 ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.1.0.1:443 rr persistent 10800
  -> 192.168.56.11:6443           Masq    1      0          0

六、Flannel网络服务部署

1、生成Flannel证书

cd /opt/kubernetes/ssl/

cat > flanneld-csr.json <<EOF
{
  "CN": "flanneld",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
   -ca-key=/opt/kubernetes/ssl/ca-key.pem \
   -config=/opt/kubernetes/ssl/ca-config.json \
   -profile=kubernetes flanneld-csr.json | cfssljson -bare flanneld

2、分发证书到Node节点

scp flanneld*.pem 192.168.56.12:/opt/kubernetes/ssl/
scp flanneld*.pem 192.168.56.13:/opt/kubernetes/ssl/

3、分发Flannel软件包到Node节点

①下载解压Flannel

cd /opt/kubernetes/tools
wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz
tar xf flannel-v0.10.0-linux-amd64.tar.gz
cp flanneld mk-docker-opts.sh /opt/kubernetes/bin/

②分发到节点

scp flanneld mk-docker-opts.sh 192.168.56.12:/opt/kubernetes/bin/
scp flanneld mk-docker-opts.sh 192.168.56.13:/opt/kubernetes/bin/

③分发`对应脚本到/opt/kubernetes/bin目录下`

cd /opt/kubernetes/tools/kubernetes/cluster/centos/node/bin
cp remove-docker0.sh /opt/kubernetes/bin/
scp remove-docker0.sh 192.168.56.12:/opt/kubernetes/bin/
scp remove-docker0.sh 192.168.56.13:/opt/kubernetes/bin/

4、创建Flannel配置文件

cat > /opt/kubernetes/cfg/flannel <<EOF
FLANNEL_ETCD="-etcd-endpoints=https://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379"
FLANNEL_ETCD_KEY="-etcd-prefix=/kubernetes/network"
FLANNEL_ETCD_CAFILE="--etcd-cafile=/opt/kubernetes/ssl/ca.pem"
FLANNEL_ETCD_CERTFILE="--etcd-certfile=/opt/kubernetes/ssl/flanneld.pem"
FLANNEL_ETCD_KEYFILE="--etcd-keyfile=/opt/kubernetes/ssl/flanneld-key.pem"
EOF

分发到Node节点

scp /opt/kubernetes/cfg/flannel 192.168.56.12:/opt/kubernetes/cfg/
scp /opt/kubernetes/cfg/flannel 192.168.56.13:/opt/kubernetes/cfg/

5、设置Flannel系统服务文件

cat > /usr/lib/systemd/system/flannel.service <<EOF
[Unit]
Description=Flanneld overlay address etcd agent
After=network.target
Before=docker.service

[Service]
EnvironmentFile=-/opt/kubernetes/cfg/flannel
ExecStartPre=/opt/kubernetes/bin/remove-docker0.sh
ExecStart=/opt/kubernetes/bin/flanneld ${FLANNEL_ETCD} ${FLANNEL_ETCD_KEY} ${FLANNEL_ETCD_CAFILE} ${FLANNEL_ETCD_CERTFILE} ${FLANNEL_ETCD_KEYFILE}
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -d /run/flannel/docker

Type=notify

[Install]
WantedBy=multi-user.target
RequiredBy=docker.service
EOF

分发到Node节点

scp /usr/lib/systemd/system/flannel.service 192.168.56.12:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/flannel.service 192.168.56.13:/usr/lib/systemd/system/

6、Flannel集成CNI

①下载CNI软件包

###官方下载地址：
###https://github.com/containernetworking/plugins/releases###
cd /opt/kubernetes/tools/
wget https://github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz

mkdir /opt/kubernetes/bin/cni
tar xf cni-plugins-amd64-v0.7.1.tgz -C /opt/kubernetes/bin/cni
scp -r /opt/kubernetes/bin/cni/*

②分发到Node节点

scp -r /opt/kubernetes/bin/cni/* 192.168.56.12:/opt/kubernetes/bin/cni/
scp -r /opt/kubernetes/bin/cni/* 192.168.56.13:/opt/kubernetes/bin/cni/

③创建Etcd的key-Master上面执行一次即可

/opt/kubernetes/bin/etcdctl --ca-file /opt/kubernetes/ssl/ca.pem --cert-file /opt/kubernetes/ssl/flanneld.pem --key-file /opt/kubernetes/ssl/flanneld-key.pem \
      --no-sync -C https://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379 \
mk /kubernetes/network/config '{ "Network": "10.2.0.0/16", "Backend": { "Type": "vxlan", "VNI": 1 }}' >/dev/null 2>&1

④启动flannel服务

systemctl daemon-reload
systemctl enable flannel
chmod +x /opt/kubernetes/bin/*
systemctl start flannel

7、配置Docker使用Flannel

①修改`/usr/lib/systemd/system/docker.service`

[Unit]
After=network-online.target firewalld.service flannel.service
Wants=network-online.target
Requires=flannel.service

Description=Docker Application Container Engine
Documentation=https://docs.docker.com
BindsTo=containerd.service
#After=network-online.target firewalld.service containerd.service
#Wants=network-online.target
#Requires=docker.socket

[Service]
EnvironmentFile=-/run/flannel/docker

ExecStart=/usr/bin/dockerd $DOCKER_OPTS

②分发到Node节点

scp /usr/lib/systemd/system/docker.service 192.168.56.12:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/docker.service 192.168.56.13:/usr/lib/systemd/system

③重启Docker

systemctl daemon-reload
systemctl restart docker

七、创建服务测试集群

1、创建一个测试用的deployment

kubectl run net-test --image=alpine --replicas=2 sleep 360000

2、查看Pod获取IP情况

[root@k8s-node1 ~]# kubectl get pod -o wide
NAME                        READY     STATUS    RESTARTS   AGE       IP            NODE
net-test-5767cb94df-qhznf   1/1       Running   0          3m        10.2.64.252   192.168.56.13
net-test-5767cb94df-rlq2c   1/1       Running   0          3m        10.2.26.249   192.168.56.12

3、测试连通性

ping 10.2.64.252

八、Kubernetes必备插件安装

1、CoreDNS

①YAML文件

cat /srv/addons/coredns/coredns.yaml

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
    }
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: coredns
  namespace: kube-system
  labels:
    k8s-app: coredns
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/name: "CoreDNS"
spec:
  replicas: 2
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  selector:
    matchLabels:
      k8s-app: coredns
  template:
    metadata:
      labels:
        k8s-app: coredns
    spec:
      serviceAccountName: coredns
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
        - key: "CriticalAddonsOnly"
          operator: "Exists"
      containers:
      - name: coredns
        image: coredns/coredns:1.0.6
        imagePullPolicy: IfNotPresent
        resources:
          limits:
            memory: 170Mi
          requests:
            cpu: 100m
            memory: 70Mi
        args: [ "-conf", "/etc/coredns/Corefile" ]
        volumeMounts:
        - name: config-volume
          mountPath: /etc/coredns
        ports:
        - containerPort: 53
          name: dns
          protocol: UDP
        - containerPort: 53
          name: dns-tcp
          protocol: TCP
        livenessProbe:
          httpGet:
            path: /health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 60
          timeoutSeconds: 5
          successThreshold: 1
          failureThreshold: 5
      dnsPolicy: Default
      volumes:
        - name: config-volume
          configMap:
            name: coredns
            items:
            - key: Corefile
              path: Corefile
---
apiVersion: v1
kind: Service
metadata:
  name: coredns
  namespace: kube-system
  labels:
    k8s-app: coredns
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/name: "CoreDNS"
spec:
  selector:
    k8s-app: coredns
  clusterIP: 10.1.0.2
  ports:
  - name: dns
    port: 53
    protocol: UDP
  - name: dns-tcp
    port: 53
    protocol: TCP

View Code

②创建CoreDNS

kubectl create -f /srv/addons/coredns/coredns.yaml

③查看

[root@k8s-node1 ~]# kubectl get pod -n kube-system
NAME                             READY     STATUS    RESTARTS   AGE
coredns-77c989547b-h8x7n         1/1       Running   0          7m
coredns-77c989547b-xvkhz         1/1       Running   0          7m

2、Dashboard

①YAML文件

cat /srv/addons/dashboard/kubernetes-dashboard.yaml 
# Copyright 2017 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Configuration to deploy release version of the Dashboard UI compatible with
# Kubernetes 1.8.
#
# Example usage: kubectl create -f <this_file>

# ------------------- Dashboard Secret ------------------- #

apiVersion: v1
kind: Secret
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard-certs
  namespace: kube-system
type: Opaque

---
# ------------------- Dashboard Service Account ------------------- #

apiVersion: v1
kind: ServiceAccount
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kube-system

---
# ------------------- Dashboard Role & Role Binding ------------------- #

kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: kubernetes-dashboard-minimal
  namespace: kube-system
rules:
  # Allow Dashboard to create 'kubernetes-dashboard-key-holder' secret.
- apiGroups: [""]
  resources: ["secrets"]
  verbs: ["create"]
  # Allow Dashboard to create 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]
  resources: ["configmaps"]
  verbs: ["create"]
  # Allow Dashboard to get, update and delete Dashboard exclusive secrets.
- apiGroups: [""]
  resources: ["secrets"]
  resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs"]
  verbs: ["get", "update", "delete"]
  # Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
- apiGroups: [""]
  resources: ["configmaps"]
  resourceNames: ["kubernetes-dashboard-settings"]
  verbs: ["get", "update"]
  # Allow Dashboard to get metrics from heapster.
- apiGroups: [""]
  resources: ["services"]
  resourceNames: ["heapster"]
  verbs: ["proxy"]
- apiGroups: [""]
  resources: ["services/proxy"]
  resourceNames: ["heapster", "http:heapster:", "https:heapster:"]
  verbs: ["get"]

---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: kubernetes-dashboard-minimal
  namespace: kube-system
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: kubernetes-dashboard-minimal
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard
  namespace: kube-system

---
# ------------------- Dashboard Deployment ------------------- #

kind: Deployment
apiVersion: apps/v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kube-system
spec:
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
    spec:
      containers:
      - name: kubernetes-dashboard
        #image: k8s.gcr.io/kubernetes-dashboard-amd64:v1.8.3
        image: mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.8.3
        ports:
        - containerPort: 8443
          protocol: TCP
        args:
          - --auto-generate-certificates
          # Uncomment the following line to manually specify Kubernetes API server Host
          # If not specified, Dashboard will attempt to auto discover the API server and connect
          # to it. Uncomment only if the default does not work.
          # - --apiserver-host=http://my-address:port
        volumeMounts:
        - name: kubernetes-dashboard-certs
          mountPath: /certs
          # Create on-disk volume to store exec logs
        - mountPath: /tmp
          name: tmp-volume
        livenessProbe:
          httpGet:
            scheme: HTTPS
            path: /
            port: 8443
          initialDelaySeconds: 30
          timeoutSeconds: 30
      volumes:
      - name: kubernetes-dashboard-certs
        secret:
          secretName: kubernetes-dashboard-certs
      - name: tmp-volume
        emptyDir: {}
      serviceAccountName: kubernetes-dashboard
      # Comment the following tolerations if Dashboard must not be deployed on master
      tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule

---
# ------------------- Dashboard Service ------------------- #

kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
  name: kubernetes-dashboard
  namespace: kube-system
spec:
  type: NodePort
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 30001
  selector:
    k8s-app: kubernetes-dashboard
  type: NodePort

View Code

②创建Dashboard

kubectl create -f /srv/addons/dashboard/

③查看

kubectl cluster-info
Kubernetes master is running at https://192.168.56.11:6443
CoreDNS is running at https://192.168.56.11:6443/api/v1/namespaces/kube-system/services/coredns:dns/proxy
kubernetes-dashboard is running at https://192.168.56.11:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

④访问Dashboard

https://192.168.56.11:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy

用户名:admin 密码：admin 选择Token令牌模式登录

⑤获取Token

kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')

3、heapster

①YAML文件

cat /srv/addons/heapster/heapster.yaml 
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: heapster
  namespace: kube-system
---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: heapster
subjects:
  - kind: ServiceAccount
    name: heapster
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: system:heapster
  apiGroup: rbac.authorization.k8s.io
---

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: heapster
  namespace: kube-system
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: heapster
  template:
    metadata:
      labels:
        task: monitoring
        k8s-app: heapster
    spec:
      serviceAccountName: heapster
      containers:
      - name: heapster
        #image: gcr.io/google_containers/heapster-amd64:v1.5.1
        image: mirrorgooglecontainers/heapster-amd64:v1.5.1
        imagePullPolicy: IfNotPresent
        command:
        - /heapster
        - --source=kubernetes:https://kubernetes.default
        - --sink=influxdb:http://monitoring-influxdb.kube-system.svc:8086
---
apiVersion: v1
kind: Service
metadata:
  labels:
    task: monitoring
    # For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)
    # If you are NOT using this as an addon, you should comment out this line.
    #kubernetes.io/cluster-service: 'true'
    kubernetes.io/name: Heapster
  name: heapster
  namespace: kube-system
spec:
  ports:
  - port: 80
    targetPort: 8082
  selector:
    k8s-app: heapster

View Code

②创建heapster

kubectl create -f /srv/addons/heapster/

③登录Dashboard查看

4、`ingress`

①YAML文件

cat /srv/addons/ingress/ingress-rbac.yml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: ingress
  namespace: kube-system

---

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: ingress
subjects:
  - kind: ServiceAccount
    name: ingress
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io
[root@k8s-node1 ~]# cat /srv/addons/ingress/ingress-rbac.yml 
apiVersion: v1
kind: ServiceAccount
metadata:
  name: ingress
  namespace: kube-system

---

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: ingress
subjects:
  - kind: ServiceAccount
    name: ingress
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io

View Code

②部署Traefik

kubectl create -f /srv/addons/ingress/

5、Helm

①部署Helm客户端

cd /opt/kubernetes/tools
wget https://storage.googleapis.com/kubernetes-helm/helm-v2.9.1-linux-amd64.tar.gz
tar xf helm-v2.9.1-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/

②初始化Helm并部署Tiller服务端

helm init --upgrade –i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.9.1 --stable-repo-url https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts

③所有节点安装socat命令

yum install -y socat

④验证安装是否成功

[root@k8s-node1 ~]# helm version
Client: &version.Version{SemVer:"v2.9.1", GitCommit:"20adb27c7c5868466912eebdf6664e7390ebe710", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.9.1", GitCommit:"20adb27c7c5868466912eebdf6664e7390ebe710", GitTreeState:"clean"}

⑤使用Helm部署第一个应用

创建服务账号

kubectl create serviceaccount --namespace kube-system tiller

创建集群的角色绑定

kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller

为应用程序设置serviceAccount

kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'

搜索Helm应用

[root@k8s-node1 ~]# helm search jenkins
NAME              CHART VERSION    APP VERSION    DESCRIPTION                                       
stable/jenkins    0.13.5           2.73           Open source continuous integration server. It s..

查看repo helm repo list

[root@k8s-node1 ~]# helm repo list
NAME      URL                                                   
stable    https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts
local     http://127.0.0.1:8879/charts

安装

helm install stable/jenkins

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posted @ 2019-07-26 00:30 闫新江阅读(1070) 评论(0) 编辑收藏举报

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Demon

linux运维、架构之路-Kubernetes离线集群部署-无坑

一、部署环境介绍

1、服务器规划

2、Kubernetes 1.10.1包下载

3、Kubernetes工作流程

4、Kubernetes环境初始化

①设置主机名

②设置/etc/hosts保证主机名能够解析

③关闭SELinux和防火墙

④优化内核参数

⑤设置部署节点到其它所有节点的SSH免密码登录

5、部署 Docker(所有节点)

①添加yum源安装Docker

②统一创建安装所需目录(所有节点)

二、安装证书工具CFSSL制作CA证书

1、下载CFSSL工具

2、初始化cfssl

3、生成CA文件的JSON配置文件

4、创建用来生成CA证书签名请求CSR的JSON配置文件

5、生成CA证书ca.pem和密钥ca-key.pem

6、分发CA证书到k8s-node1和k8s-node2节点

三、ETCD集群部署

1、下载分发ETCD软件包

2、创建 etcd 证书签名请求

3、生成 etcd 证书和私钥

4、分发ETCD证书文件

5、设置ETCD配置文件

6、创建ETCD系统启动服务

7、分发ETCD配置文件及系统服务文件

8、启动集群ETCD服务

9、验证ETCD集群状态

四、Master节点服务部署

1、Kubernetes API服务部署

①创建生成CSR的JSON配置文件

②生成 kubernetes 证书和私钥

③证书分发

④创建 kube-apiserver使用的客户端token文件

⑤创建基础用户名/密码认证配置

⑥创建Kubernetes API Server系统服务文件

⑦启动API Server服务

2、部署Controller Manager服务

①创建Controller Manager系统服务文件

②启动Controller Manager

3、部署Kubernetes Scheduler

①创建Kubernetes Scheduler系统服务文件

②启动Kubernetes Scheduler服务

4、部署kubectl 命令行工具

①拷贝二进制命令

②创建 admin 证书签名请求

③生成 admin 证书和私钥

④设置集群参数

⑤设置客户端认证参数

⑥设置上下文参数

⑦设置默认上下文参数

⑧使用kubectl工具查看集群节点

五、Node节点部署

1、部署kubelet

①创建角色绑定

②创建kubelet bootstrapping kubeconfig文件，设置集群参数

③设置客户端认证参数

④设置上下文参数

⑤选择默认上下文参数

⑥分发生成的bootstrap.kubeconfig文件

⑦设置CNI支持kubelet-Node节点执行

⑧创建kubelet系统服务文件

⑨启动kubelet服务

2、部署Kubernetes Proxy服务

①配置kube-proxy使用LVS

②创建 kube-proxy 证书请求

③生成证书

④分发证书到Node节点

⑤创建kube-proxy配置文件

⑥分发kubeconfig配置文件

⑦创建kube-proxy系统服务文件

⑧分发kube-proxy系统服务文件到Node节点

⑨启动kube-proxy服务

六、Flannel网络服务部署

1、生成Flannel证书

2、分发证书到Node节点

③分发`对应脚本到/opt/kubernetes/bin目录下`

①修改`/usr/lib/systemd/system/docker.service`

4、`ingress`