Kubernetes(二)-- 搭建(未完待续)

一、部署前规划

1. 操作系统初始化设置 :需要设置好集群机器,关闭防火墙和selinux

2. 创建ca证书和私钥 :集群间通信要加密,那么肯定要有ca的创建,以后就用这一步创建的ca当作证书颁发机构给自己发证书,也可通过配置文件省略

3. docker安装与卸载 :k8s基于docker,要先安装docker

4. harbor安装 :有了docker之后,需要用到docker仓库,这里搭建一个镜像仓库平台,便于管理

5. harbor使用 :上传和下载镜像,设置共有和私有

6. 部署etcd集群 :k8s用etcd进行服务发现。比如集群节点间报告自己的状态及可以提供的服务,就用etcd实现。所以要先安装etcd

7. 部署flannel网络 :集群间有自己的集群间网络,这个靠flannel来实现,所以要安装flannel

8. 部署master节点 :主集群节点,管理节点

9. 部署node节点 :服务端阶段

10. 部署dns插件 :Kubenetes以插件的形式提供DNS服务,一般是运行在kube-system名称空间下的service,拥有固定IP地址。

          插件运行起来后,配置各个节点上的kubelet,告诉它集群中DNS服务的IP地址,kebelet在                               

           启动容器时再将DNS服务器的地址告诉容器,容器再使用此DNS服务器进行域名解析。

11. 部署dashboard插件 :k8s的图形化界面

12. 部署heapster插件:更好支持原生的k8s

 

二、centos 7环境部署

 1.基础环境

  1).机器情况

    master:192.168.11.199
    node:192.168.11.196

  

  2).关闭防火墙和selinux

1     # systemctl stop firewalld
2 
3     # systemctl disable firewalld
4 
5     # setenforce 0

 

三、创建ca证书和私钥

  1.生成CA私钥(.key):

1 # openssl genrsa -out ca.key 2048             //2048,安全性更高

 

  

 

  2.生成CA证书请求(.csr):

1 # openssl req -new -key ca.key -out ca.csr

 

  

  

  3.自签名得到根证书(.crt):

1 # openssl x509 -req -days 365 -in ca.csr -signkey ca.key -out ca.crt

 

  

  

  4.生成三个文件

  

 

四、安装docker-ce + docker-compose (脚本安装)

 1 # vim docker.sh
 2 #!/bin/bash
 3 # coding: utf-8
 4 # Copyright (c) 2018
 5 set -e   #返回值为0时,退出脚本
 6 echo "1. 备份yum"
 7 {
 8 for i in /etc/yum.repos.d/*.repo;do cp $i ${i%.repo}.bak;done
 9 rm -rf /etc/yum.repos.d/*.repo
10 } || {
11 echo "备份出错,请手动执行"
12 exit 1
13 }
14 
15 echo "2. 获取网络yum"
16 {
17 wget -P  /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/Centos-7.repo >/dev/null 2>&1
18 wget -P  /etc/yum.repos.d/ http://mirrors.163.com/.help/CentOS7-Base-163.repo >/dev/null 2>&1
19 yum clean >/dev/null 2>&1
20 yum repolist >/dev/null 2>&1
21 } || {
22 echo "获取出错,请手动执行"
23 exit 1
24 }
25 
26 echo "3. 安装docker-ce......" 
27 {
28 yum -y install  yum-utils >/dev/null 2>&1
29 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo >/dev/null 2>&1
30 yum clean >/dev/null 2>&1
31 yum repolist >/dev/null 2>&1
32 yum -y install epel-release docker-ce >/dev/null 2>&1
33 } || {
34 echo "安装出错,请手动安装"
35 exit 1
36 }
37 
38 systemctl start docker >/dev/null 2>&1
39 systemctl enable docker >/dev/null 2>&1
40 
41 echo "4. 添加内和参数"
42 {
43 cat <<EOF>> /etc/sysctl.conf 
44 net.bridge.bridge-nf-call-ip6tables = 1
45 net.bridge.bridge-nf-call-iptables = 1
46 EOF
47 sysctl -p >/dev/null 2>&1
48 }
49 
50 echo "5. 添加镜像加速"
51 {
52 cat <<EOF>> /etc/docker/daemon.json 
53 {
54 "registry-mirrors": [
55 "https://registry.docker-cn.com"
56     ]
57 }
58 EOF
59 }
60 
61 echo "6.安装docker-compose"
62 {
63 curl -L https://github.com/docker/compose/releases/download/1.23.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
64 chmod +x /usr/local/bin/docker-compose
65 } || {
66 echo "安装出错,请手动安装"
67 exit 1
68 }
69 
70 systemctl daemon-reload >/dev/null 2>&1
71 systemctl restart docker >/dev/null 2>&1
72 
73 rm -rf ./*.sh

 

五、harbor安装

  1.下载harbor包

     在线安装:# wget -P /usr/local/src/     https://github.com/vmware/harbor/releases/download/v1.2.0/harbor-online-installer-v1.2.0.tgz

     离线安装:# wget https://github.com/vmware/harbor/releases/download/v1.2.0/harbor-offline-installer-v1.2.0.tgz

  2.解压到/usr/local:# tar xvf harbor-online-installer-v1.2.0.tgz -C /usr/local

     

   3.查看解压目录

     

 

  4.修改hostname:# vim harbor.cfg

          hostname  manager

  5.执行安装脚本:./install.sh

     

  

  6..查看进程:# docker  ps 或者 docker-compose  ps

     

 

  7.登录:http://192.168.11.199,用户名:admin ,密码:Harbor12345 

      

 

 

    

 

 

  8.修改镜像加速地址为harbor仓库的地址

      # rm -rf /etc/docker/daemon.json 

      # vim /usr/lib/systemd/system/docker.service

        --insecure-registry 192.168.11.199

       

  9.重新加载daemon和docker

      # systemctl daemon-reload

      # systemctl restart docker

  10.定制镜像,用于上传和下载

      # vim  Dockerfile    

        FROM centos:centos7.1.1503    //基础镜像是centos,版本为7.1

        ENV TZ "Asia/Shanghai"      //设置系统的时区为上海

      # docker build -t 192.168.11.199/library/centos7.1:0.1 .

     

  

   11.测试上传与下载

    1).登录仓库:  # docker login 192.168.11.199 

     

     2).上传镜像

      # docker image ls -a

      # docker push 192.168.11.199/library/centos7.1    

     

    

 

      3).下载任意镜像:  # docker pull nginx     

    

    4).打标签: # docker tag nginx:latest 192.168.11.199/library/nginx.v1      

    5).上传:  # docker push 192.168.11.199/library/nginx.v1  

    

  

    6).删除镜像:  #docker image rm 192.168.11.199/library/nginx.v1:latest        

    7).重新从私有仓库拉取:  # docker pull 192.168.11.199/library/nginx.v1       

    

 

  12.harbor配置TLS证书

     1).修改harbor配置文件:  # vim /usr/local/harbor/harbor.cfg 

                    ui_url_protocol = https     

                    ssl_cert = /home/ssl/ca.crt

                    ssl_cert_key = /home/ssl/ca.key

    

 

     2).重启harbor:# ./install.sh

    

    

 

  

    因为证书是自签的,所以谷歌会拦截警告

        

 

六、部署etcd集群

  1.master节点安装etcd和kubernetes-master:     # yum -y install etcd kubernetes-master

  2.修改etcd配置文件,设置监听地址:  # vim /etc/etcd/etcd.conf

                      ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"

                     

  3.修改k8s api配置:# vim /etc/kubernetes/apiserver 

            KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"

 

  4.配置kubernetes使用token请求

    不配置的话,直接删除ServiceAccount:

        KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"

    配置: # vim /etc/kubernetes/apiserver             

        KUBE_API_ARGS="--service_account_key_file=/home/ssl/ca.key"

        

        # vim /etc/kubernetes/controller-manager

        KUBE_CONTROLLER_MANAGER_ARGS="--service_account_private_key_file=/home/ssl/ca.key"

        

   5.启动etcd、kube-apiserver、kube-controller-manager、kube-scheduler服务:

        # for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do systemctl restart $SERVICES;systemctl enable $SERVICES;systemctl status $SERVICES ; done

 

七、部署flannel网络

  1.在etcd中定义flannel网络:# etcdctl mk /atomic.io/network/config '{"Network":"172.17.0.0/16"}'

  2.在node节点上安装flannel和kubernetes-node:

      # yum -y install epel-release
      # yum -y install flannel kubernetes-node

  3.为flannel网络指定etcd服务,修改/etc/sysconfig/flanneld文件     

      # vim /etc/sysconfig/flanneld
        FLANNEL_ETCD_ENDPOINTS="http://192.168.11.199:2379"       //客户端IP

  4.修改/etc/kubernetes/config文件

    # vim /etc/kubernetes/config
      KUBE_MASTER="--master=http://192.168.11.199:8080"

  5. 修改对应minion机器上的配置文件/etc/kubernetes/kubelet

    # vim /etc/kubernetes/kubelet
      KUBELET_ADDRESS="--address=0.0.0.0"
      KUBELET_HOSTNAME="--hostname-override=192.168.11.196"
      KUBELET_API_SERVER="--api-servers=http://192.168.11.199:8080"

    

  6.在所有minion节点上启动kube-proxy,kubelet,docker,flanneld等服务,并设置开机启动。

    # for SERVICES in kube-proxy kubelet docker flanneld;do systemctl restart $SERVICES;systemctl enable $SERVICES;systemctl status $SERVICES; done

  7.验证集群

    # kubectl get node
    # kubectl -s http://192.168.11.199:8080 get node

八、部署服务

  1.

    

 

 

    

 

 

 

 

    

 

      

       

 

    

  

posted @ 2018-11-16 16:59  依然-Fanstic  阅读(326)  评论(0编辑  收藏  举报