Kubernetes V1.10 二进制部署集群

南楼画角 提交于 2020-05-02 14:29:54

1. 架构篇

1.1 kubernetes 架构说明

             

1.2 Flannel网络架构图

1.3 Kubernetes工作流程               

           

2. 组件介绍

2.1 Master节点

2.1.1 、网关服务 API Server:提供Kubernetes API接口,主要处理REST操作以及更新ETCD中的对象。所有资源增删改查的唯一入口
  只有API Server才直接操作etcd
  其他模块通过API Server查询活修改数据
  提供其他模块之间的数据交互和通信的枢纽
2.1.2、 调度器 Scheduler:资源调度,负责分配调度Pod到集群内的Node节点   监听kube-apiserver,查询还未分配Node的Pod   根据调度策略为这些Pod分配节点
2.1.3、 控制器 Controller Manager:所有其他群集级别的功能。目前由控制器Manager执行。资源对象的自动化控制中心。它通过apiserver监控整个集群的状态,并确保集群处于预期的工作状态。
2.1.4、 存储 ETCD:所有持久化的状态信息存储在ETCD中

2.2 Node节点

2.2.1、Kubelet:管理Pods以及容器、镜像、Volume等,实现对集群对节点的管理。
2.2.2、Kube-proxy:提供网络代理以及负载均衡,实现与Service通信。
2.2.3、Docker:负责节点的容器管理工作

3.环境说明

3.1 部署节点说明

主机名 IP 用途 部署软件
linux-node1 172.16.1.31 master apiserver,scheduler,controller-manager
etcd,flanneld
linux-node2 172.16.1.32 node kubelet,kube-proxy
etcd,flanneld
linux-node3 172.16.1.33 node kubelet,kube-proxy
etcd,flanneld

3.2 软件包版本

软件包 下载地址
kubernetes-node-linux-amd64.tar.gz https://dl.k8s.io/v1.10.1/kubernetes-node-linux-amd64.tar.gz
kubernetes-server-linux-amd64.tar.gz https://dl.k8s.io/v1.10.1/kubernetes-server-linux-amd64.tar.gz
kubernetes-client-linux-amd64.tar.gz https://dl.k8s.io/v1.10.1/kubernetes-client-linux-amd64.tar.gz
kubernetes.tar.gz https://dl.k8s.io/v1.10.1/kubernetes.tar.gz
flannel-v0.11.0-linux-amd64.tar.gz https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz
cni-plugins-amd64-v0.7.1.tgz https://github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz
etcd-v3.2.18-linux-amd64.tar.gz https://github.com/coreos/etcd/releases/download/v3.2.18/etcd-v3.2.18-linux-amd64.tar.gz

4.Kubernetes 安装

4.1 初始化环境

4.1.1、设置关闭防火墙及SELINUX,关闭swap
  systemctl stop firewalld && systemctl disable firewalld
  setenforce 0
  vi /etc/selinux/config
  SELINUX=disabled
  swapoff
-a && sysctl -w vm.swappiness=0   sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab 4.1.2、下载国内docker源,部署docker   cd /etc/yum.repos.d/   wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo   yum clean all && yum repolist -y   yum install -y docker-ce   systemctl start docker 4.1.3. 准备部署目录   mkdir -p /opt/kubernetes/{cfg,bin,ssl,log}   # scp -r /opt/kubernetes 172.16.1.32:/opt/   # scp -r /opt/kubernetes 172.16.1.33:/opt/ 4.1.4、添加启动命令所在目录环境变量   vim ~/.bash_profile   # .bash_profile   # Get the aliases and functions   if [ -f ~/.bashrc ]; then . ~/.bashrc   fi   # User specific environment and startup programs   PATH=$PATH:$HOME/bin:/opt/kubernetes/bin/   export PATH   source ~/.bash_profile   # scp ~/.bash_profile 172.16.1.32:~/   # scp ~/.bash_profile 172.16.1.33:~/ 4.1.5、配置内核参数【需重启服务器】   cat /etc/sysctl.conf   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   net.bridge.bridge-nf-call-ip6tables = 1   net.bridge.bridge-nf-call-iptables = 1   net.bridge.bridge-nf-call-arptables = 1

4.2 安装制作CA证书工具【kubernetes 系统的各组件需要使用 TLS 证书对通信进行加密】

4.2.1. 安装CFSSL
  [root@linux-node1 ~]# cd /usr/local/src
  [root@linux-node1 src]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
  [root@linux-node1 src]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
  [root@linux-node1 src]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
  [root@linux-node1 src]# chmod +x cfssl*
  [root@linux-node1 src]# mv cfssl-certinfo_linux-amd64 /opt/kubernetes/bin/cfssl-certinfo
  [root@linux-node1 src]# mv cfssljson_linux-amd64  /opt/kubernetes/bin/cfssljson
  [root@linux-node1 src]# mv cfssl_linux-amd64  /opt/kubernetes/bin/cfssl
  #复制cfssl命令文件到k8s-node1和k8s-node2节点。如果实际中多个节点,就都需要同步复制。
  # scp /opt/kubernetes/bin/cfssl* 172.16.1.32:/opt/kubernetes/bin/
  # scp /opt/kubernetes/bin/cfssl* 172.16.1.33:/opt/kubernetes/bin/
4.2.2. 生成模板文件   [root@linux-node1 ~]# cd /usr/local/src   [root@linux-node1 src]# mkdir ssl && cd ssl   [root@linux-node1 ssl]# cfssl print-defaults config > config.json #默认证书生产策略配置模板   [root@linux-node1 ssl]# cfssl print-defaults csr > csr.json #默认csr请求模板 4.2.3. 创建用来生成CA文件的JSON配置文件   [root@linux-node1 ~]# vim /usr/local/src/ssl/ca-config.json   {    "signing": {    "default": {    "expiry": "8760h"    },    "profiles": {    "kubernetes": {    "usages": [    "signing",    "key encipherment",    "server auth",    "client auth"    ],    "expiry": "8760h"    }    }    }   } 4.2.4.创建用来生成 CA 证书签名请求(CSR)的 JSON 配置文件   [root@linux-node1 ~]# vim /usr/local/src/ssl/ca-csr.json   {    "CN": "kubernetes",    "key": {    "algo": "rsa",    "size": 2048    },    "names": [    {    "C": "CN",    "ST": "BeiJing",    "L": "BeiJing",    "O": "k8s",    "OU": "System"    }    ]   } 4.2.5. 生成CA证书(ca.pem)和秘钥(ca-key.pem)   [root@linux-node1 ~]# cd /usr/local/src/ssl   [root@ linux-node1 ssl]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca #初始化创建CA认证中心,生成 ca-key.pem(私钥) ca.pem(公钥)   [root@ linux-node1 ssl]# ls -l ca*   -rw-r--r-- 1 root root 290 Mar 4 13:45 ca-config.json   -rw-r--r-- 1 root root 1001 Mar 4 14:09 ca.csr   -rw-r--r-- 1 root root 208 Mar 4 13:51 ca-csr.json   -rw------- 1 root root 1679 Mar 4 14:09 ca-key.pem   -rw-r--r-- 1 root root 1359 Mar 4 14:09 ca.pem 4.2.6.分发证书   [root@ linux-node1 ssl]# cp ca.csr ca.pem ca-key.pem ca-config.json /opt/kubernetes/ssl   SCP证书到k8s-node1和k8s-node2节点   # scp ca.csr ca.pem ca-key.pem ca-config.json 172.16.1.32:/opt/kubernetes/ssl   # scp ca.csr ca.pem ca-key.pem ca-config.json 172.16.1.33:/opt/kubernetes/ssl

4.3 部署ETCD集群

4.3.1. 准备etcd软件包
  [root@linux-node1 ~]# cd /usr/local/src && wget https://github.com/coreos/etcd/releases/download/v3.2.18/etcd-v3.2.18-linux-amd64.tar.gz
  [root@linux-node1 src]# tar zxf etcd-v3.2.18-linux-amd64.tar.gz
  [root@linux-node1 src]# cd etcd-v3.2.18-linux-amd64
  [root@linux-node1 etcd-v3.2.18-linux-amd64]# cp etcd etcdctl /opt/kubernetes/bin/
  # scp etcd etcdctl 172.16.1.32:/opt/kubernetes/bin/
  # scp etcd etcdctl 172.16.1.33:/opt/kubernetes/bin/

4.3.2. 创建etcd证书签名请求
  [root@linux-node1 src]# cd /usr/local/src
  [root@linux-node1 src]# vim /usr/local/src/etcd-csr.json
  {
    "CN": "etcd",
    "hosts": [
    "127.0.0.1",
    "172.16.1.31",
    "172.16.1.32",
    "172.16.1.33"
    ],
    "key": {
    "algo": "rsa",
    "size": 2048
    },
    "names": [
      {
        "C": "CN",
        "ST": "BeiJing",
        "L": "BeiJing",
        "O": "k8s",
        "OU": "System"
      }
    ]
  }

4.3.3. 生成etcd证书和私钥
  [root@linux-node1 ~]# cd /usr/local/src
  [root@linux-node1 src]# 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
  # 会生成以下证书文件
  [root@k8s-master src]# ls -l etcd*
  -rw-r--r-- 1 root root 1045 Mar 5 11:27 etcd.csr
  -rw-r--r-- 1 root root 257 Mar 5 11:25 etcd-csr.json
  -rw------- 1 root root 1679 Mar 5 11:27 etcd-key.pem
  -rw-r--r-- 1 root root 1419 Mar 5 11:27 etcd.pem

4.3.4. 将证书移动到/opt/kubernetes/ssl目录下
  [root@k8s-master src]# cp etcd*.pem /opt/kubernetes/ssl
  # scp etcd*.pem 172.16.1.32:/opt/kubernetes/ssl
  # scp etcd*.pem 172.16.1.33:/opt/kubernetes/ssl
  [root@linux-node1 src]# rm -f etcd.csr etcd-csr.json

4.3.5. 设置etcd配置文件【etcd配置文件需手动创建生成】
  #其他节点 灰色背景标注 需要修改
  [root@linux-node1 ~]# vim /opt/kubernetes/cfg/etcd.conf
  #[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://172.16.1.31:2380"
  ETCD_LISTEN_CLIENT_URLS="https://172.16.1.31:2379,https://127.0.0.1:2379"
  #ETCD_MAX_SNAPSHOTS="5"
  #ETCD_MAX_WALS="5"
  #ETCD_CORS=""
  #[cluster]
  ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.1.31:2380"
  # 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://172.16.1.31:2380,etcd-node2=https://172.16.1.32:2380,etcd-node3=https://172.16.1.33:2380"
  ETCD_INITIAL_CLUSTER_STATE="new"
  ETCD_INITIAL_CLUSTER_TOKEN="k8s-etcd-cluster"
  ETCD_ADVERTISE_CLIENT_URLS="https://172.16.1.31:2379"
  #[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"

4.3.6. 创建etcd系统服务
  [root@linux-node1 ~]# vim /etc/systemd/system/etcd.service
  [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

4.3.7. 重新加载系统服务
  [root@linux-node1 ~]# systemctl daemon-reload
  [root@linux-node1 ~]# systemctl enable etcd
  # scp /opt/kubernetes/cfg/etcd.conf 172.16.1.32:/opt/kubernetes/cfg/
  # scp /opt/kubernetes/cfg/etcd.conf 172.16.1.33:/opt/kubernetes/cfg/
  # scp /etc/systemd/system/etcd.service 172.16.1.32:/etc/systemd/system/
  # scp /etc/systemd/system/etcd.service 172.16.1.33:/etc/systemd/system/
  #在所有节点上创建etcd存储目录并启动etcd
  [root@linux-node1 ~]# mkdir /var/lib/etcd
  [root@linux-node1 ~]# systemctl start etcd
  [root@linux-node1 ~]# systemctl status etcd

4.3.8. 验证集群
  [root@linux-node1 ~]# etcdctl --endpoints=https://172.16.1.31:2379 --ca-file=/opt/kubernetes/ssl/ca.pem --cert-file=/opt/kubernetes/ssl/etcd.pem --key-file=/opt/kubernetes/ssl/etcd-key.pem cluster-health
  member 435fb0a8da627a4c is healthy: got healthy result from https://172.16.1.32:2379
  member 6566e06d7343e1bb is healthy: got healthy result from https://172.16.1.31:2379
  member ce7b884e428b6c8c is healthy: got healthy result from https://172.16.1.33:2379
  cluster is healthy

4.4 Master节点部署 【Kubernetes API服务】

4.4.1.1 【部署Kubernetes API服务部署】准备软件包
   [root@linux-node1 ~]# #cd /usr/local/src && wget https://dl.k8s.io/v1.10.1/kubernetes-server-linux-amd64.tar.gz #需要代理上网下载
   [root@linux-node1 ~]# #cd /usr/local/src && tar xf kubernetes-server-linux-amd64.tar.gz
   [root@linux-node1 ~]# cd /usr/local/src/kubernetes
  [root@linux-node1 kubernetes]# cp server/bin/kube-apiserver /opt/kubernetes/bin/
  [root@linux-node1 kubernetes]# cp server/bin/kube-controller-manager /opt/kubernetes/bin/
  [root@linux-node1 kubernetes]# cp server/bin/kube-scheduler /opt/kubernetes/bin/
4.4.1.2【部署Kubernetes API服务部署】创建生成CSR的 JSON 配置文件   [root@linux-node1 src]# vim /usr/local/src/ssl/kubernetes-csr.json   {    "CN": "kubernetes",    "hosts": [    "127.0.0.1",    "172.16.1.31",    "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"    }    ]   } 4.4.1.3【部署Kubernetes API服务部署】生成 kubernetes 证书和私钥   [root@linux-node1 ssl]# cd /usr/local/src/ssl/   [root@linux-node1 ssl]# 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   [root@linux-node1 src]# cp kubernetes*.pem /opt/kubernetes/ssl/   # scp kubernetes*.pem 172.16.1.32:/opt/kubernetes/ssl/   # scp kubernetes*.pem 172.16.1.33:/opt/kubernetes/ssl/ 4.4.1.4【部署Kubernetes API服务部署】创建 kube-apiserver 使用的客户端 token 文件   [root@linux-node1 ~]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '   cebfb6641d0845bd61808e2337955ea0   [root@linux-node1 ~]# vim /opt/kubernetes/ssl/bootstrap-token.csv   cebfb6641d0845bd61808e2337955ea0,kubelet-bootstrap,10001,"system:kubelet-bootstrap" 4.4.1.5【部署Kubernetes API服务部署】创建基础用户名/密码认证配置   [root@linux-node1 ~]# vim /opt/kubernetes/ssl/basic-auth.csv   admin,admin,1   readonly,readonly,2 4.4.1.6【部署Kubernetes API服务部署】部署Kubernetes API Server (配置文件中指定service对外访问生成的随机端口范围)   [root@linux-node1 ~]# vim /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=172.16.1.31 \    --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://172.16.1.31:2379,https://172.16.1.32:2379,https://172.16.1.33:2379 \    --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 4.4.1.7【部署Kubernetes API服务部署】启动API Server服务   [root@linux-node1 ~]# systemctl daemon-reload   [root@linux-node1 ~]# systemctl enable kube-apiserver   [root@linux-node1 ~]# systemctl start kube-apiserver 4.4.1.8【部署Kubernetes API服务部署】查看API Server服务状态   [root@linux-node1 ~]# systemctl status kube-apiserver 4.4.2.1【部署Controller Manager(控制服务)】配置Controller Manager   [root@linux-node1 ~]# vim /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 4.4.2.2【部署Controller Manager(控制服务)】启动Controller Manager   [root@linux-node1 ~]# systemctl daemon-reload   [root@linux-node1 scripts]# systemctl enable kube-controller-manager   [root@linux-node1 scripts]# systemctl start kube-controller-manager 4.4.2.3【部署Controller Manager(控制服务)】查看服务状态   [root@linux-node1 scripts]# systemctl status kube-controller-manager 4.4.3.1【部署Kubernetes Scheduler(调度服务)】配置Kubernetes Scheduler   [root@linux-node1 ~]# vim /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 4.4.3.2【部署Kubernetes Scheduler(调度服务)】部署服务   [root@linux-node1 ~]# systemctl daemon-reload   [root@linux-node1 scripts]# systemctl enable kube-scheduler   [root@linux-node1 scripts]# systemctl start kube-scheduler   [root@linux-node1 scripts]# systemctl status kube-scheduler    4.4.3.3【部署kubectl 命令行工具】准备二进制命令包   [root@linux-node1 ~]# #cd /usr/local/src && wget https://dl.k8s.io/v1.10.1/kubernetes-client-linux-amd64.tar.gz #需要代理上网下载   [root@linux-node1 ~]# #cd /usr/local/src && tar xf kubernetes-client-linux-amd64.tar.gz   [root@linux-node1 ~]# cd /usr/local/src/kubernetes/client/bin   [root@linux-node1 bin]# cp kubectl /opt/kubernetes/bin/ 4.4.3.4【部署kubectl 命令行工具】创建 admin 证书签名请求   [root@linux-node1 ~]# cd /usr/local/src/ssl/   [root@linux-node1 ssl]# vim admin-csr.json   {    "CN": "admin",    "hosts": [],    "key": {    "algo": "rsa",    "size": 2048    },    "names": [    {    "C": "CN",    "ST": "BeiJing",    "L": "BeiJing",    "O": "system:masters",    "OU": "System"    }    ]   } 4.4.3.5【部署kubectl 命令行工具】生成 admin 证书和私钥   [root@linux-node1 ssl]# 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   [root@linux-node1 ssl]# ls -l admin*   -rw-r--r-- 1 root root 1009 Mar 5 12:29 admin.csr   -rw-r--r-- 1 root root 229 Mar 5 12:28 admin-csr.json   -rw------- 1 root root 1675 Mar 5 12:29 admin-key.pem   -rw-r--r-- 1 root root 1399 Mar 5 12:29 admin.pem   [root@linux-node1 ssl]# mv admin*.pem /opt/kubernetes/ssl/ 4.4.3.6【部署kubectl 命令行工具】设置集群参数   [root@linux-node1 src]# kubectl config set-cluster kubernetes --certificate-authority=/opt/kubernetes/ssl/ca.pem --embed-certs=true --server=https://172.16.1.31:6443   Cluster "kubernetes" set. 4.4.3.7【部署kubectl 命令行工具】设置客户端认证参数   [root@linux-node1 src]# kubectl config set-credentials admin --client-certificate=/opt/kubernetes/ssl/admin.pem --embed-certs=true --client-key=/opt/kubernetes/ssl/admin-key.pem   User "admin" set. 4.4.3.8【部署kubectl 命令行工具】设置上下文参数   [root@linux-node1 src]# kubectl config set-context kubernetes --cluster=kubernetes --user=admin   Context "kubernetes" created. 4.4.3.9【部署kubectl 命令行工具】设置默认上下文   [root@linux-node1 src]# kubectl config use-context kubernetes   Switched to context "kubernetes". 4.4.3.10【部署kubectl 命令行工具】使用kubectl工具(获取节点状态)   [root@linux-node1 ~]# kubectl get cs   NAME STATUS MESSAGE ERROR   controller-manager Healthy ok   scheduler Healthy ok   etcd-1 Healthy {"health":"true"}   etcd-2 Healthy {"health":"true"}   etcd-0 Healthy {"health":"true"}

4.5 Node节点部署

 

4.5.1.1【部署kubelet】二进制包准备 将软件包从linux-node1复制到linux-node2中去。
  [root@linux-node1 bin]# cd /usr/local/src/kubernetes/server/bin/ && cp kubelet kube-proxy /opt/kubernetes/bin/
  # scp kubelet kube-proxy 172.16.1.32:/opt/kubernetes/bin/
  # scp kubelet kube-proxy 172.16.1.33:/opt/kubernetes/bin/

4.5.1.2【部署kubelet】创建角色绑定
  [root@linux-node1 ~]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
  clusterrolebinding "kubelet-bootstrap" created

4.5.1.3【部署kubelet】创建 kubelet bootstrapping kubeconfig 文件 设置集群参数
  [root@linux-node1 ~]# kubectl config set-cluster kubernetes  --certificate-authority=/opt/kubernetes/ssl/ca.pem  --embed-certs=true  --server=https://172.16.1.31:6443  --kubeconfig=bootstrap.kubeconfig
  Cluster "kubernetes" set.

4.5.1.4【部署kubelet】设置客户端认证参数
  [root@linux-node1 ~]# kubectl config set-credentials kubelet-bootstrap  --token=cebfb6641d0845bd61808e2337955ea0   --kubeconfig=bootstrap.kubeconfig
  User "kubelet-bootstrap" set.

4.5.1.5【部署kubelet】设置上下文参数
  [root@linux-node1 ~]# kubectl config set-context default  --cluster=kubernetes  --user=kubelet-bootstrap  --kubeconfig=bootstrap.kubeconfig
  Context "default" created.

4.5.1.6【部署kubelet】选择默认上下文
  [root@linux-node1 ~]# kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
  Switched to context "default".
  [root@linux-node1 kubernetes]# cp /usr/local/src/kubernetes/server/bin/bootstrap.kubeconfig /opt/kubernetes/cfg
  # scp /usr/local/src/kubernetes/server/bin/bootstrap.kubeconfig 172.16.1.32:/opt/kubernetes/cfg
  # scp /usr/local/src/kubernetes/server/bin/bootstrap.kubeconfig 172.16.1.33:/opt/kubernetes/cfg

4.5.1.7【部署kubelet】部署kubelet 1.设置CNI支持
  [root@linux-node1 ~]# mkdir -p /etc/cni/net.d
  [root@linux-node1 ~]# vim /etc/cni/net.d/10-default.conf
  {
    "name": "flannel",
    "type": "flannel",
    "delegate": {
      "bridge": "docker0",
      "isDefaultGateway": true,
      "mtu": 1400
    }
  }
  # scp -r /etc/cni/net.d 172.16.1.32:/etc/cni/
  # scp -r /etc/cni/net.d 172.16.1.33:/etc/cni/

4.5.1.8【部署kubelet】创建kubelet目录
  [root@linux-node1 ~]# mkdir /var/lib/kubelet
  # scp -r /var/lib/kubelet 172.16.1.32:/var/lib/
  # scp -r /var/lib/kubelet 172.16.1.33:/var/lib/

4.5.1.9【部署kubelet】创建kubelet服务配置
  # 灰色部分需要修改
  [root@k8s-node1 ~]# vim /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=172.16.1.31 \
    --hostname-override=172.16.1.31 \
    --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
  # scp /usr/lib/systemd/system/kubelet.service 172.16.1.32:/usr/lib/systemd/system/
  # scp /usr/lib/systemd/system/kubelet.service 172.16.1.33:/usr/lib/systemd/system/

4.5.1.10【部署kubelet】启动Kubelet
  [root@linux-node2 ~]# systemctl daemon-reload
  [root@linux-node2 ~]# systemctl enable kubelet
  [root@linux-node2 ~]# systemctl start kubelet
  [root@linux-node3 ~]# systemctl daemon-reload
  [root@linux-node3 ~]# systemctl enable kubelet
  [root@linux-node3 ~]# systemctl start kubelet

4.5.1.11【部署kubelet】查看服务状态
  [root@linux-node2 kubernetes]# systemctl status kubelet

4.5.1.12 查看csr请求 注意是在linux-node1上执行。
  [root@linux-node1 ~]# kubectl get csr
  NAME AGE REQUESTOR CONDITION
  node-csr-0_w5F1FM_la_SeGiu3Y5xELRpYUjjT2icIFk9gO9KOU 1m kubelet-bootstrap Pending

4.5.1.13【部署kubelet】批准kubelet 的 TLS 证书请求
  [root@linux-node1 ~]# kubectl get csr|grep 'Pending' | awk 'NR>0{print $1}'| xargs kubectl certificate approve
    certificatesigningrequest.certificates.k8s.io "node-csr-QCgiejwSx_bPgcBLNxHkMHs-lzNAY-bJNgm4skUMqII" approved
  执行完毕后,查看节点状态已经是Ready的状态了
  [root@linux-node1 ssl]# kubectl get node 
    NAME          STATUS   ROLES   AGE   VERSION   EXTERNAL-IP   OS-IMAGE KERNEL-VERSION                       CONTAINER-RUNTIME
    172.16.1.32 Ready   <none>   10m   v1.10.1    <none>       CentOS Linux 7 (Core) 3.10.0-693.el7.x86_64     docker://19.3.5
    172.16.1.33 Ready   <none>   10m   v1.10.1    <none>       CentOS Linux 7 (Core) 3.10.0-693.el7.x86_64   docker://19.3.5

4.5.2.1【部署Kubernetes Proxy】配置kube-proxy使用LVS
  [root@linux-node2 ~]# yum install -y ipvsadm ipset conntrack

4.5.2.2【部署Kubernetes Proxy】创建 kube-proxy 证书请求
  [root@linux-node1 ~]# cd /usr/local/src/ssl/
  [root@linux-node1 ssl]# vim kube-proxy-csr.json
  {
    "CN": "system:kube-proxy",
    "hosts": [],
    "key": {
    "algo": "rsa",
    "size": 2048
    },
    "names": [
      {
        "C": "CN",
        "ST": "BeiJing",
        "L": "BeiJing",
        "O": "k8s",
        "OU": "System"
      }
    ]
  }

4.5.2.3【部署Kubernetes Proxy】生成证书
  [root@linux-node1ssl]# 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

4.5.2.4【部署Kubernetes Proxy】分发证书到所有Node节点
  [root@linux-node1 ssl]# cp kube-proxy*.pem /opt/kubernetes/ssl/
  # scp kube-proxy*.pem 172.16.1.32:/opt/kubernetes/ssl/
  # scp kube-proxy*.pem 172.16.1.33:/opt/kubernetes/ssl/

4.5.2.5【部署Kubernetes Proxy】创建kube-proxy配置文件
  [root@linux-node1 ssl]# kubectl config set-cluster kubernetes --certificate-authority=/opt/kubernetes/ssl/ca.pem --embed-certs=true --server=https://172.16.1.31:6443 --kubeconfig=kube-proxy.kubeconfig
  Cluster "kubernetes" set.
  [root@linux-node1 ssl]# 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
  User "kube-proxy" set.
  [root@linux-node1 ssl]# kubectl config set-context default --cluster=kubernetes --user=kube-proxy --kubeconfig=kube-proxy.kubeconfig
  Context "default" created.
  [root@linux-node1 ssl]# kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
  Switched to context "default".

4.5.2.6【部署Kubernetes Proxy】分发kubeconfig配置文件
  [root@linux-node1 ssl]# cp kube-proxy.kubeconfig /opt/kubernetes/cfg/
  # scp kube-proxy.kubeconfig 172.16.1.32:/opt/kubernetes/cfg/
  # scp kube-proxy.kubeconfig 172.16.1.33:/opt/kubernetes/cfg/

4.5.2.7【部署Kubernetes Proxy】创建kube-proxy服务配置
  [root@linux-node1 ~]# mkdir /var/lib/kube-proxy
  # scp -r /var/lib/kube-proxy 172.16.1.32:/var/lib/
  # scp -r /var/lib/kube-proxy 172.16.1.33:/var/lib/
  #各节点灰色部分 需要修改
  [root@k8s-node1 ~]# vim /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=172.16.1.31 \
    --hostname-override=172.16.1.31 \
    --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
  # scp /usr/lib/systemd/system/kube-proxy.service 172.16.1.32:/usr/lib/systemd/system/
  # scp /usr/lib/systemd/system/kube-proxy.service 172.16.1.33:/usr/lib/systemd/system/

4.5.2.8【部署Kubernetes Proxy】启动Kubernetes Proxy(**Node节点启动)
  [root@linux-node2 ~]# systemctl daemon-reload
  [root@linux-node2 ~]# systemctl enable kube-proxy
  [root@linux-node2 ~]# systemctl start kube-proxy
  [root@linux-node3 ~]# systemctl daemon-reload
  [root@linux-node3 ~]# systemctl enable kube-proxy
  [root@linux-node3 ~]# systemctl start kube-proxy

4.5.2.9【部署Kubernetes Proxy】查看服务状态 查看kube-proxy服务状态
  [root@linux-node2 scripts]# systemctl status kube-proxy
  检查LVS状态
  [root@linux-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
  -> 172.16.1.31:6443 Masq 1 0 0 
  如果你在两台实验机器都安装了kubelet和proxy服务,使用下面的命令可以检查状态:
  [root@linux-node1 ssl]# kubectl get node
  NAME          STATUS   ROLES    AGE   VERSION
  172.16.1.32   Ready    <none>   22m   v1.10.1
  172.16.1.33   Ready    <none>   3m    v1.10.1

4.6 flanal网络部署

4.6.1 为Flannel创建证书
  [root@linux-node1 ~]#cd /usr/local/src/ssl
  [root@linux-node1 ssl]# vim flanneld-csr.json
  {
    "CN": "flanneld",
    "hosts": [],
    "key": {
      "algo": "rsa",
      "size": 2048
    },
    "names": [
      {
        "C": "CN",
        "ST": "BeiJing",
        "L": "BeiJing",
        "O": "k8s",
        "OU": "System"
      }
    ]
  }

4.6.2 生成证书
  [root@linux-node1 ssl]# 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
  [root@linux-node1 ssl]# ls flanneld*.pem
    flanneld-key.pem flanneld.pem
  [root@linux-node1 ssl]# ls -l flanneld*.pem
    -rw------- 1 root root 1675 Dec 27 18:55 flanneld-key.pem
    -rw-r--r-- 1 root root 1391 Dec 27 18:55 flanneld.pem

4.6.3 分发证书
  [root@linux-node1 ssl]# cp flanneld*.pem /opt/kubernetes/ssl/
  # scp flanneld*.pem 172.16.1.32:/opt/kubernetes/ssl/
  # scp flanneld*.pem 172.16.1.33:/opt/kubernetes/ssl/

4.6.4 下载Flannel软件包
  [root@linux-node1 ~]# cd /usr/local/src &&  wget  https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz
  [root@linux-node1 src]# tar zxf flannel-v0.10.0-linux-amd64.tar.gz
  [root@linux-node1 src]# cp flanneld mk-docker-opts.sh /opt/kubernetes/bin/
  #复制到linux-node2节点
  # scp flanneld mk-docker-opts.sh 172.16.1.32:/opt/kubernetes/bin/
  # scp flanneld mk-docker-opts.sh 172.16.1.33:/opt/kubernetes/bin/
  #复制对应脚本到/opt/kubernetes/bin目录下。
  [root@linux-node1 ~]# wget https://dl.k8s.io/v1.10.1/kubernetes.tar.gz #需要代理上网下载此包   [root@linux-node1 ~]# tar xf kubernetes.tar.gz -C /usr/local/src/ && cd /usr/local/src/kubernetes/cluster/centos/node/bin/   [root@linux-node1 bin]# cp remove-docker0.sh /opt/kubernetes/bin/   # scp remove-docker0.sh 172.16.1.32:/opt/kubernetes/bin/   # scp remove-docker0.sh 172.16.1.33:/opt/kubernetes/bin/ 4.6.5 配置Flannel   [root@linux-node1 ~]# vim /opt/kubernetes/cfg/flannel   FLANNEL_ETCD="-etcd-endpoints=https://172.16.1.31:2379,https://172.16.1.32:2379,https://172.16.1.33:2379"   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"   #复制配置到其它节点上   # scp /opt/kubernetes/cfg/flannel 172.16.1.32:/opt/kubernetes/cfg/   # scp /opt/kubernetes/cfg/flannel 172.16.1.33:/opt/kubernetes/cfg/ 4.6.6 设置Flannel系统服务   [root@linux-node1 ~]# vim /usr/lib/systemd/system/flannel.service   [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   复制系统服务脚本到其它节点上   # scp /usr/lib/systemd/system/flannel.service 172.16.1.32:/usr/lib/systemd/system/   # scp /usr/lib/systemd/system/flannel.service 172.16.1.33:/usr/lib/systemd/system/ 4.6.7【Flannel CNI集成】下载CNI插件   [root@linux-node1 ~]# wget https://github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz   [root@linux-node1 ~]# mkdir /opt/kubernetes/bin/cni   [root@linux-node1 ~]# tar zxf cni-plugins-amd64-v0.7.1.tgz -C /opt/kubernetes/bin/cni   # scp -r /opt/kubernetes/bin/cni 172.16.1.32:/opt/kubernetes/bin/   # scp -r /opt/kubernetes/bin/cni 172.16.1.33:/opt/kubernetes/bin/ 4.6.8【Flannel CNI集成】创建Etcd的key   [root@linux-node1 ~]# /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://172.16.1.31:2379,https://172.16.1.32:2379,https://172.16.1.33:2379 mk /kubernetes/network/config '{ "Network": "10.2.0.0/16", "Backend": { "Type": "vxlan", "VNI": 1 }}' >/dev/null 2>&1 4.6.9【Flannel CNI集成】启动flannel (所有节点都启动)   [root@linux-node1 ~]# systemctl daemon-reload   [root@linux-node1 ~]# systemctl enable flannel   [root@linux-node1 ~]# chmod +x /opt/kubernetes/bin/*   [root@linux-node1 ~]# systemctl start flannel 4.6.10【Flannel CNI集成】查看服务状态   [root@linux-node1 ~]# systemctl status flannel 4.6.11【Flannel CNI集成】配置Docker使用Flannel   [root@linux-node1 ~]# vim /usr/lib/systemd/system/docker.service   [Unit] #在Unit下面修改After和增加Requires   After=network-online.target firewalld.service flannel.service   Wants=network-online.target   Requires=flannel.service #docker启动 依赖flannel网络   [Service] #增加EnvironmentFile=-/run/flannel/docker   Type=notify   EnvironmentFile=-/run/flannel/docker   ExecStart=/usr/bin/dockerd $DOCKER_OPTS   #将配置复制到另外两个节点   # scp /usr/lib/systemd/system/docker.service 172.16.1.32:/usr/lib/systemd/system/   # scp /usr/lib/systemd/system/docker.service 172.16.1.33:/usr/lib/systemd/system/ 4.6.12【Flannel CNI集成】重启Docker (所有节点重启)   [root@linux-node1 ~]# systemctl daemon-reload   [root@linux-node1 ~]# systemctl restart docker

4.7 CoreDNS部署

4.7.1 编写corDNS yaml文件
    [root@linux-node1 ~]# vim 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

4.7.2 部署coredns
    [root@linux-node1 ~]# kubectl create -f coredns.yaml

4.7.3 测试DNS是否配置成功
    [root@linux-node1 ~]# kubectl run dns-test --rm -it --image=alpine /bin/sh
    If you don't see a command prompt, try pressing enter.
    / # ping www.baidu.com -c 2
    PING www.baidu.com (61.135.169.125): 56 data bytes
    64 bytes from 61.135.169.125: seq=0 ttl=127 time=5.718 ms
    64 bytes from 61.135.169.125: seq=1 ttl=127 time=5.695 ms
    --- www.baidu.com ping statistics ---
    2 packets transmitted, 2 packets received, 0% packet loss
    round-trip min/avg/max = 5.695/5.706/5.718 ms
    / #

4.8 dashboard部署

4.8.1 创建dashboard yaml存放目录【自定义创建】
  [root@linux-node1 ~]# mkdir -p /root/dashboard_yaml_dir
4.8.2 编写admin-user-sa-rbac.yaml文件
  [root@linux-node1 ~]# vim /root/dashboard_yaml_dir/admin-user-sa-rbac.yaml
  apiVersion: v1
  kind: ServiceAccount
  metadata:
    name: admin-user
    namespace: kube-system
  ---
  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: kube-system
4.8.3 编写kubernetes-dashboard.yaml文件
  [root@linux-node1 ~]# vim /root/dashboard_yaml_dir/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
4.8.4 编写ui-admin-rbac.yaml文件
  [root@linux-node1 ~]# vim /root/dashboard_yaml_dir/ui-admin-rbac.yaml
  kind: ClusterRole
  apiVersion: rbac.authorization.k8s.io/v1
  metadata:
    name: ui-admin
  rules:
  - apiGroups:
    - ""
    resources:
    - services
    - services/proxy
    verbs:
    - '*'
  ---
  apiVersion: rbac.authorization.k8s.io/v1
  kind: RoleBinding
  metadata:
    name: ui-admin-binding
    namespace: kube-system
  roleRef:
    apiGroup: rbac.authorization.k8s.io
    kind: ClusterRole
    name: ui-admin
  subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: admin
4.8.5 编写ui-read-rbac.yaml文件
  [root@linux-node1 ~]# vim /root/dashboard_yaml_dir/ui-read-rbac.yaml
  kind: ClusterRole
  apiVersion: rbac.authorization.k8s.io/v1
  metadata:
    name: ui-read
  rules:
  - apiGroups:
    - ""
    resources:
    - services
    - services/proxy
    verbs:
    - get
    - list
    - watch
  
  ---
  apiVersion: rbac.authorization.k8s.io/v1
  kind: RoleBinding
  metadata:
    name: ui-read-binding
    namespace: kube-system
  roleRef:
    apiGroup: rbac.authorization.k8s.io
    kind: ClusterRole
    name: ui-read
  subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: readonly
4.8.6 创建Dashboard
  [root@linux-node1 ~]# kubectl create -f /root/dashboard_yaml_dir/
  [root@linux-node1 ~]# kubectl cluster-info
  Kubernetes master is running at https://172.16.1.31:6443
  kubernetes-dashboard is running at 
  https://172.16.1.31:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy
  To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
4.8.7 访问Dashboard
  https://172.16.1.31:6443/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。
4.8.8 获取Token
kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')

 

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