k8s源码集群搭建

集群搭建：

image-20200506225106712.png

1、生产环境k8s平台规划

老男孩老师文档： https://www.cnblogs.com/yanyanqaq/p/12607713.html

讲师博客： https://blog.stanley.wang/categories/Kubernetes%E5%AE%B9%E5%99%A8%E4%BA%91%E6%8A%80%E6%9C%AF%E4%B8%93%E9%A2%98/

https://blog.stanley.wang/

https://www.cnblogs.com/yanyanqaq/p/12607713.html#242%E9%85%8D%E7%BD%AE

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image-20200506225615170.png

生产环境规划：

master 建议3台

etcd 最少3台 (3,5,7) 奇数解决 1比1的问题

image-20200506230558525.png

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1、实验环境规划和集群节点初始化

集群规划：

3台：一个master, 2个 node

mster: k8s-master1 192.168.31.63

worker: k8s-node1 192.168.31.65

worker: k8s-node2 192.168.31.66

k8s 版本： 1.16

os 版本： 7.7

安装方式：二进制安装

这里是看老男孩老师讲的课做的规划

主机配置

192.168.208.200 cahost
192.168.208.11 lb1
192.168.208.12 lb2
192.168.208.21 node1
192.168.208.22 node2如下：

所有节点基础配置的初始化：

1、关闭防火墙

systemctl stop firewalld

systemctl enablefirewalld

      2、关闭 selinux

setenforce 0

vim /etc/selinux/config, :SELINUX=disabled

3、配置主机名

4、名称解析

/etc/hosts

5、时间同步

选择一个节点作为服务端，其它的作客户端

master为服务端：端口号(123)

# yum install chrony -y

vim /etc/chrony.config  
 server 127.127.1.0 iburst    #上游服务器

                                    allow   192.168.31.0/24       #访问限制

                                   local stratum 10

                               # systemctl start chronyd

                               # systemctl enable chronyd

node 节点配置

# yum install chrony -y

# vim /etc/chrony.config

server 192.168.31.63 iburst

# systemctl start chronyd

# systemctl enable chronyd

# chrony sources 查看

6、关闭交换分区

(启动交换分区可能会导致服务无法启动)

swapoff -a

vim /etc/fstab, 把最后一行 swap 注释

检查 free -m 查看

这里使用老男孩机构的环境

管理主机：192.168.208.200

LB1: 192.168.208.11

LB1: 192.168.208.12

node1： 192.168.208.21

node2： 192.168.208.22

CA证书机构

CA 证书 (面试)

加密方式：

对称加密：加密和解密用相同的密码

非对称加密：发送时公钥加密，相对应的私钥解密，即使用密钥对加解密

单向加密：只能加密，不能解密, 如 md5

证书：包含以下部分：

端实体

注册机构

签证机构

证书撤销列表

证书存取库

ssl 证书来源

网络第三方机构购买

自签证书 openssl、 cfsll 构建CA来发证书

image-20200507011319529.png

2、准备证书环境

下载： 192.168.208.200 链接https://pkg.cfssl.org/

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/bin/cfssl
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/bin/cfssl-json
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/bin/cfssl-certinfo

chmod a+x /usr/bin/cfssl*
mkdir -p /opt/certs

创建成生CA证书签名请求 csr 的json配置文件

vim /opt/certs/ca-csr.sjon
{
    "CN":"Tjcom", #域名
    "hosts":[
    
    ],
    "key":{
        "algo":"rsa",
        "size":2048
    },
    "names":[
        {
            "C":"CN",    #国家
            "ST": "guangdong", #州 省
            "L": "shengzheng",  # 市
            "O": "tj",            # 组织
            "OU": "ops"             #单位
        }
    ],
    "ca":{
        "expiry": "175200h"
    }
}

生成根证书

[root@CA-Host certs]# pwd
/opt/certs
[root@CA-Host certs]# cfssl gencert -initca ca-csr.sjon  |cfssl-json -bare ca
[root@CA-Host certs]# ll
总用量 16
-rw-r--r--. 1 root root  997 5月   7 14:06 ca.csr
-rw-r--r--. 1 root root  221 5月   7 14:02 ca-csr.sjon
-rw-------. 1 root root 1679 5月   7 14:06 ca-key.pem
-rw-r--r--. 1 root root 1346 5月   7 14:06 ca.pem

3、准备 docker环境：所有服务节点都安装

curl -fsSL https://get.docker.com |bash -s docker --mirror Aliyun
mkdir -p /data/docker  /etc/docker

node01: 192.168.208.21

vim /etc/docker/daemon.sjon
{
  "graph": "/data/docker",
  "storage-driver": "overlay2",
  "insecure-registries": ["registry.access.redhat.com","192.168.208.200"],
  "registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
  "bip": "172.7.21.1/24",
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true
}

node02: 192.168.208.22

vim /etc/docker/daemon.json
{
  "graph": "/data/docker",
  "storage-driver": "overlay2",
  "insecure-registries": ["registry.access.redhat.com","192.168.208.200"],
  "registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
  "bip": "172.7.22.1/24",  #这里地址不一样
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true
}

管理节点 ”192.168.208.200

vim /etc/docker/daemon.json
{
  "graph": "/data/docker",
  "storage-driver": "overlay2",
  "insecure-registries": ["registry.access.redhat.com","192.168.208.200"],
  "registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
  "bip": "172.7.200.1/24",  #这里地址不一样
  "exec-opts": ["vative.cgroupdriver=systemd"],
  "live-restore": true
}

4、在管理主机上准备 harbot私有仓库

建议 1.7.6 以上的版本， https://github.com/goharbor/harbor/releases

https://github.com/goharbor/harbor/releases/download/v1.10.0/harbor-offline-installer-v1.10.0.tgz

[#] yum install docker-compose

解压，修改配置端口：为180，和hostname, 启动密码123456，注释掉 https 443相关的启动

启动后使用 nginx反向代理

/etc/nginx/conf.d/harbor.conf
server {
  listen      80;
  server_name localhost;
  client_max_body_size 1000m,
  location / {
     proxy_pass http://127.0.0.1:180;
  }

}

启动 harbor后创建一个 public 公共库

docker pull nginx:v1.7.9

开始安装k8s

1、部署etcd集群

主机名	角色	ip
LB2	lead	192.168.208.12
node01	follow	192.168.208.21
node02	follow	192.168.208.22

etcd下载：https://github.com/etcd-io/etcd/releases 建议不使用超过 3.3的版本

https://github.com/etcd-io/etcd/releases/download/v3.2.30/etcd-v3.2.30-linux-amd64.tar.gz

步骤1：在 200节点上创建 etcd 证书文件

root@CA-Host certs]# pwd
/opt/certs
[root@CA-Host certs]# vim ca-config.json
{
    "signing": {
        "default": {
            "expiry": "175200h"
        },
        "profiles": {
            "server": {
                "expiry": "175200h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "server auth"
                ]
            },
            "client": {
                "expiry": "175200h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "client auth"
                ]
            },
            "peer":{
                "expiry": "175200h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "server auth",
                    "client auth"
                ]
            }
         }
    }

}
[root@CA-Host certs]# vim etcd-peer-csr.json
{
    "CN":"k8s-etcd",
    "hosts": [
        "192.168.208.11",
        "192.168.208.12",
        "192.168.208.21",
        "192.168.208.22"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "guangdong",
            "L": "shengzheng",
            "O": "tj",
            "OU": "OPS"
        }
    ]
}

执行生成 etcd证书文件

[root@CA-Host certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=peer etcd-peer-csr.json|cfssl-json -bare etcd-peer
[root@CA-Host certs]# ll
总用量 36
-rw-r--r--. 1 root root  654 5月   8 15:24 ca-config.json
-rw-r--r--. 1 root root  997 5月   7 14:06 ca.csr
-rw-r--r--. 1 root root  221 5月   7 14:02 ca-csr.sjon
-rw-------. 1 root root 1679 5月   7 14:06 ca-key.pem
-rw-r--r--. 1 root root 1346 5月   7 14:06 ca.pem
-rw-r--r--. 1 root root 1070 5月   8 15:43 etcd-peer.csr
-rw-r--r--. 1 root root  266 5月   8 15:38 etcd-peer-csr.json
-rw-------. 1 root root 1675 5月   8 15:43 etcd-peer-key.pem
-rw-r--r--. 1 root root 1436 5月   8 15:43 etcd-peer.pem

步骤2：在第一台要安装的机器上安装 etcd ,192.168.208.12

解压至 opt 
[root@k8s-L2 ~]# useradd -s /sbin/nologin -M etcd
[root@k8s-L2 tool]# tar -xzvf etcd-v3.2.30-linux-amd64.tar.gz -C /opt/
[root@k8s-L2 opt]# mv etcd-v3.2.30-linux-amd64 etcd-v3.2.30
[root@k8s-L2 opt]# ln -s /opt/etcd-v3.2.30/ /opt/etcd
[root@k8s-L2 opt]# ll
总用量 0
lrwxrwxrwx. 1 root      root       18 5月   8 16:03 etcd -> /opt/etcd-v3.2.30/
drwxr-xr-x. 3 630384594 600260513 123 4月   2 03:01 etcd-v3.2.30
创建3个目录
[root@k8s-L2 opt]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@k8s-L2 certs]# pwd
/opt/etcd/certs
拷贝证书
[root@k8s-L2 certs]# scp 192.168.208.200:/opt/certs/ca.pem ./
[root@k8s-L2 certs]# scp 192.168.208.200:/opt/certs/etcd-peer.pem ./
[root@k8s-L2 certs]# scp 192.168.208.200:/opt/certs/etcd-peer-key.pem ./
[root@k8s-L2 certs]# ll
总用量 12
-rw-r--r--. 1 root root 1346 5月   8 16:06 ca.pem
-rw-------. 1 root root 1675 5月   8 16:10 etcd-peer-key.pem
-rw-r--r--. 1 root root 1436 5月   8 16:08 etcd-peer.pem

创建启动脚本
vim /opt/etcd/etcd-server-startup.sh
#/bin/sh
./etcd --name etcd-server-208-12 \
       --data-dir /data/etcd/etcd-server \
       --listen-peer-urls https://192.168.208.12:2380 \
       --listen-client-urls https://192.168.208.12:2379,http://127.0.0.1:2379 \
       --quota-backend-bytes 800000000 \
       --initial-advertise-peer-urls https://192.168.208.12:2380 \
       --advertise-client-urls https://192.168.208.12:2379,http://127.0.0.1:2379 \
       --initial-cluster etcd-server-208-12=https://192.168.208.12:2380,etcd-server-208-21=https://192.168.208.21:2380,etcd-server-208-22=https://192.168.208.22:2380 \
       --ca-file ./certs/ca.pem \
       --cert-file ./certs/etcd-peer.pem \
       --key-file ./certs/etcd-peer-key.pem \
       --client-cert-auth \
       --trusted-ca-file ./certs/ca.pem \
       --peer-ca-file ./certs/ca.pem \
       --peer-cert-file ./certs/etcd-peer.pem \
       --peer-key-file ./certs/etcd-peer-key.pem \
       --peer-client-cert-auth \
       --peer-trusted-ca-file ./certs/ca.pem \
       --log-output stdout
 
 更改权限
[root@k8s-L2 etcd]# chown -R etcd.etcd /opt/etcd-v3.2.30
[root@k8s-L2 etcd]# chown -R etcd.etcd /data/etcd/
[root@k8s-L2 etcd]# chown -R etcd.etcd /data/logs/

使用 supervisor来启动文件
[root@k8s-L2 etcd]# yum install supervisor -y
[root@k8s-L2 etcd]# systemctl start supervisord
[root@k8s-L2 etcd]# systemctl enable supervisord
创建 supervisord.ini 的配置文件

[root@k8s-L2 etcd]# vim /etc/supervisord.d/etcd-server.ini
[program:etcd-server-208-12]
command=/opt/etcd/etcd-server-startup.sh
numprocs=1
directory=/opt/etcd
autostart=true
autorestart=true
startsecs=30
startretries=3
exitcodes=0,2
stopsignal=QUIT
stopwaitsecs=10
user=etcd
redirect_stderr=true
stdout_logfile=/data/logs/etcd-server/etcd/stdout.log
stdout_logfile_maxbytes=64MB
stdout_logfile_backups=4
stdout_capture_maxbytes=1MB
stdout_evens_enabled=false

[root@k8s-L2 etcd]#supervisord update

这里可能会失败， 其实也可以直接启动 这个脚本，增加了配置文件 一定要重启 supervsio


启动脚本的另一个处理方法

服务管理脚本路径 
centos7: systemctl
/usr/lib/systemd/system

centos6:
/etc/rd.d/rcN.d

步骤3:将部署好的etcd 拷贝到其它节点

为了不重启操作，在这里将部署在 192.168.208.12 上的 /opt/etcd 复制到 192.168.208.21,192.168.208.22 上

[root@k8s-L2 opt]# scp -r etcd-v3.2.30 192.168.208.21:/opt/
[root@k8s-L2 opt]# scp -r etcd-v3.2.30 192.168.208.22:/opt/

在 192.168.208.21上增加操作如下

[root@node01 ~]# useradd -s /sbin/nologin -M etcd
[root@node01 ~]# cd /opt
[root@node01 opt]# ls
containerd  etcd-v3.2.30  rh
[root@node01 opt]# ln -s /opt/etcd-v3.2.30/ /opt/etcd
[root@node01 opt]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@node01 opt]# chown -R etcd.etcd /opt/etcd-v3.2.30
[root@node01 opt]# chown -R etcd.etcd /data/etcd/
[root@node01 opt]# chown -R etcd.etcd /data/logs/
更改启动配置文件
vim /opt/etcd/etcd-server-startup.sh
#/bin/sh
./etcd --name etcd-server-208-21 \
       --data-dir /data/etcd/etcd-server \
       --listen-peer-urls https://192.168.208.21:2380 \
       --listen-client-urls https://192.168.208.21:2379,http://127.0.0.1:2379 \
       --quota-backend-bytes 800000000 \
       --initial-advertise-peer-urls https://192.168.208.21:2380 \
       --advertise-client-urls https://192.168.208.21:2379,http://127.0.0.1:2379 \
       --initial-cluster etcd-server-208-12=https://192.168.208.12:2380,etcd-server-208-21=https://192.168.208.21:2380,etcd-server-208-22=https://192.168.208.22:2380 \
       --ca-file ./certs/ca.pem \
       --cert-file ./certs/etcd-peer.pem \
       --key-file ./certs/etcd-peer-key.pem \
       --client-cert-auth \
       --trusted-ca-file ./certs/ca.pem \
       --peer-ca-file ./certs/ca.pem \
       --peer-cert-file ./certs/etcd-peer.pem \
       --peer-key-file ./certs/etcd-peer-key.pem \
       --peer-client-cert-auth \
       --peer-trusted-ca-file ./certs/ca.pem \
       --log-output stdout

在第三台 etcd 上操作如下 192.168.208.22

[root@node02 ~]# useradd -s /sbin/nologin -M etcd
[root@node02 ~]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
[root@node02 ~]# 
[root@node02 ~]# cd /opt
[root@node02 opt]# ln -s /opt/etcd-v3.2.30/ /opt/etcd
[root@node02 opt]# chown -R etcd.etcd /opt/etcd-v3.2.30
[root@node02 opt]# chown -R etcd.etcd /data/etcd/
[root@node02 opt]# chown -R etcd.etcd /data/logs/
[root@node02 opt]# 

更改启动配置文件
vim /opt/etcd/etcd-server-startup.sh
#/bin/sh
./etcd --name etcd-server-208-22 \
       --data-dir /data/etcd/etcd-server \
       --listen-peer-urls https://192.168.208.22:2380 \
       --listen-client-urls https://192.168.208.22:2379,http://127.0.0.1:2379 \
       --quota-backend-bytes 800000000 \
       --initial-advertise-peer-urls https://192.168.208.22:2380 \
       --advertise-client-urls https://192.168.208.22:2379,http://127.0.0.1:2379 \
       --initial-cluster etcd-server-208-12=https://192.168.208.12:2380,etcd-server-208-21=https://192.168.208.21:2380,etcd-server-208-22=https://192.168.208.22:2380 \
       --ca-file ./certs/ca.pem \
       --cert-file ./certs/etcd-peer.pem \
       --key-file ./certs/etcd-peer-key.pem \
       --client-cert-auth \
       --trusted-ca-file ./certs/ca.pem \
       --peer-ca-file ./certs/ca.pem \
       --peer-cert-file ./certs/etcd-peer.pem \
       --peer-key-file ./certs/etcd-peer-key.pem \
       --peer-client-cert-auth \
       --peer-trusted-ca-file ./certs/ca.pem \
       --log-output stdout

此时所有节点都执行 sh /opt/etcd/etcd-server-startup.sh

[root@k8s-L2 opt]# netstat -luntp |grep etcd
tcp        0      0 192.168.208.12:2379     0.0.0.0:*               LISTEN      13592/./etcd        
tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      13592/./etcd        
tcp        0      0 192.168.208.12:2380     0.0.0.0:*               LISTEN      13592/./etcd

[root@node01 ~]# netstat -luntp |grep etcd
tcp        0      0 192.168.208.21:2379     0.0.0.0:*               LISTEN      13732/./etcd        
tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      13732/./etcd        
tcp        0      0 192.168.208.21:2380     0.0.0.0:*               LISTEN      13732/./etcd

[root@node02 ~]# netstat -luntp |grep etcd
tcp        0      0 192.168.208.22:2379     0.0.0.0:*               LISTEN      14118/./etcd        
tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      14118/./etcd        
tcp        0      0 192.168.208.22:2380     0.0.0.0:*               LISTEN      14118/./etcd

检查 etcd 集群健康状态：在任意一台节点上操作都可以

[root@k8s-L2 etcd]# pwd
/opt/etcd
[root@k8s-L2 etcd]# ./etcdctl cluster-health
member 27335ed5e116ecf is healthy: got healthy result from http://127.0.0.1:2379
member 9fa9f37eb6f9bb63 is healthy: got healthy result from http://127.0.0.1:2379
member e00eea0c411d3da4 is healthy: got healthy result from http://127.0.0.1:2379
cluster is healthy

这里三台机器都是成功的 true 表示为主节点

[root@k8s-L2 etcd]# ./etcdctl member list
27335ed5e116ecf: name=etcd-server-208-22 peerURLs=https://192.168.208.22:2380 clientURLs=http://127.0.0.1:2379,https://192.168.208.22:2379 isLeader=false
9fa9f37eb6f9bb63: name=etcd-server-208-12 peerURLs=https://192.168.208.12:2380 clientURLs=http://127.0.0.1:2379,https://192.168.208.12:2379 isLeader=true
e00eea0c411d3da4: name=etcd-server-208-21 peerURLs=https://192.168.208.21:2380 clientURLs=http://127.0.0.1:2379,https://192.168.208.21:2379 isLeader=false

ln -s /opt/etcd/etcdctl /usr/sbin/

supervisor报错调式
[root@node001 etcd]# supervisorctl tail -f etcd-server-208-21

2、部署 k8s api-server

下载地址： kubernetes , 很难下载的

https://dl.k8s.io/v1.15.11/kubernetes-server-linux-amd64.tar.gz

步骤1：

签发client证书用于 api-server与 etcd通信使用 etcd集是server端, api-server是客户端

[root@CA-Host certs]# vim client-csr.json
vim /opt/certs/client-csr.sjon
{
        "CN":"k8s-node",
        "hosts":[
        
        ],
        "key":{
                "algo":"rsa",
                "size":2048
        },
        "names":[
                {
                        "C":"CN",
                        "ST": "guangdong",
                        "L": "shengzheng",
                        "O": "tj",
                        "OU": "ops"
                }
        ]
}

生成 client 证书

[root@CA-Host certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client

查看 client 证书此证书是 api-server 与 etcd通信的证书

[root@CA-Host certs]# ll
总用量 52
-rw-r--r--. 1 root root  654 5月   8 15:24 ca-config.json
-rw-r--r--. 1 root root  997 5月   7 14:06 ca.csr
-rw-r--r--. 1 root root  221 5月   7 14:02 ca-csr.json
-rw-------. 1 root root 1679 5月   7 14:06 ca-key.pem
-rw-r--r--. 1 root root 1346 5月   7 14:06 ca.pem
-rw-r--r--. 1 root root 1001 5月   8 20:40 client.csr
-rw-r--r--. 1 root root  190 5月   8 20:37 client-csr.json
-rw-------. 1 root root 1679 5月   8 20:40 client-key.pem
-rw-r--r--. 1 root root 1371 5月   8 20:40 client.pem

步骤2：

生成 api-server 通信的证书

[root@CA-Host certs]# vim apiserver-csr.json
{
    "CN": "k8s-apiserver",
    "hosts": [
        "127.0.0.1",
        "192.168.0.1",
        "kubernetes.default",
        "kubernetes.default.svc",
        "kubernetes.default.svc.cluster",
        "kubernetes.default.svc.cluster.local",
        "192.168.208.10",      #api-server 可能存在的地址， 也可以没有， 可以写上去，有是一定要写的
        "192.168.208.21",
        "192.168.208.22",
        "192.168.208.23"        
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C":"CN",
            "ST": "guangdong",
            "L": "shengzheng",
            "O": "tj",
            "OU": "ops"
        }
    ]

}

生成 api-server 证书，任何节点和server通信都用这一套证书即与 etcd服务通信

[root@CA-Host certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver

[root@CA-Host certs]# ll
总用量 68
-rw-r--r--. 1 root root 1257 5月   8 20:54 apiserver.csr
-rw-r--r--. 1 root root  488 5月   8 20:52 apiserver-csr.json
-rw-------. 1 root root 1679 5月   8 20:54 apiserver-key.pem
-rw-r--r--. 1 root root 1606 5月   8 20:54 apiserver.pem
-rw-r--r--. 1 root root  654 5月   8 15:24 ca-config.json
-rw-r--r--. 1 root root  997 5月   7 14:06 ca.csr
-rw-r--r--. 1 root root  221 5月   7 14:02 ca-csr.json
-rw-------. 1 root root 1679 5月   7 14:06 ca-key.pem
-rw-r--r--. 1 root root 1346 5月   7 14:06 ca.pem

步骤3：

在node01 解压 kubernets

[root@node01 tool]# tar -xzvf kubernetes-server-linux-amd64.tar.gz -C /opt   
[root@node01 tool]# cd /opt/
[root@node01 opt]# ls
containerd  etcd  etcd-v3.2.30  kubernetes  rh
[root@node01 opt]# mv kubernetes kubernetes.v1.15.11
[root@node01 opt]# ln -s /opt/kubernetes.v1.15.11/ /opt/kubernetes
[root@node01 opt]# cd /opt/kubernetes/server/bin
[root@node01 bin]# pwd
/opt/kubernetes/server/bin
[root@node01 bin]# mkdir cert
[root@node01 bin]# cd cert
# 拷贝证书
[root@node01 cert]# scp 192.168.208.200:/opt/certs/ca.pem ./
[root@node01 cert]# scp 192.168.208.200:/opt/certs/ca-key.pem ./
[root@node01 cert]# scp 192.168.208.200:/opt/certs/client.pem ./
[root@node01 cert]# scp 192.168.208.200:/opt/certs/client-key.pem ./
[root@node01 cert]# scp 192.168.208.200:/opt/certs/apiserver.pem ./ 
[root@node01 cert]# scp 192.168.208.200:/opt/certs/apiserver-key.pem ./

#创建 apiserver 配置文件
[root@node01 conf]# pwd
/opt/kubernetes/server/bin/conf
vim audit.yaml
apiVersion: audit.k8s.io/v1beta1 # This is required.
kind: Policy
# Don't generate audit events for all requests in RequestReceived stage.
omitStages:
  - "RequestReceived"
rules:
  # Log pod changes at RequestResponse level
  - level: RequestResponse
    resources:
    - group: ""
      # Resource "pods" doesn't match requests to any subresource of pods,
      # which is consistent with the RBAC policy.
      resources: ["pods"]
  # Log "pods/log", "pods/status" at Metadata level
  - level: Metadata
    resources:
    - group: ""
      resources: ["pods/log", "pods/status"]

  # Don't log requests to a configmap called "controller-leader"
  - level: None
    resources:
    - group: ""
      resources: ["configmaps"]
      resourceNames: ["controller-leader"]

  # Don't log watch requests by the "system:kube-proxy" on endpoints or services
  - level: None
    users: ["system:kube-proxy"]
    verbs: ["watch"]
    resources:
    - group: "" # core API group
      resources: ["endpoints", "services"]

  # Don't log authenticated requests to certain non-resource URL paths.
  - level: None
    userGroups: ["system:authenticated"]
    nonResourceURLs:
    - "/api*" # Wildcard matching.
    - "/version"

  # Log the request body of configmap changes in kube-system.
  - level: Request
    resources:
    - group: "" # core API group
      resources: ["configmaps"]
    # This rule only applies to resources in the "kube-system" namespace.
    # The empty string "" can be used to select non-namespaced resources.
    namespaces: ["kube-system"]

  # Log configmap and secret changes in all other namespaces at the Metadata level.
  - level: Metadata
    resources:
    - group: "" # core API group
      resources: ["secrets", "configmaps"]

  # Log all other resources in core and extensions at the Request level.
  - level: Request
    resources:
    - group: "" # core API group
    - group: "extensions" # Version of group should NOT be included.

  # A catch-all rule to log all other requests at the Metadata level.
  - level: Metadata
    # Long-running requests like watches that fall under this rule will not
    # generate an audit event in RequestReceived.
    omitStages:
      - "RequestReceived"
------------------------------------------------
创建 api-server 启动脚本 
vim /opt/kubenetes/server/bin/kube-apiserver.sh
#!/bin/bash
./kube-apiserver \
  --apiserver-count 2 \
  --audit-log-path /data/logs/kubernetes/kube-apiserver/audit-log \
  --audit-policy-file ./conf/audit.yaml \
  --authorization-mode RBAC \
  --client-ca-file ./cert/ca.pem \
  --requestheader-client-ca-file ./cert/ca.pem \
  --enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota \
  --etcd-cafile ./cert/ca.pem \
  --etcd-certfile ./cert/client.pem \
  --etcd-keyfile ./cert/client-key.pem \
  --etcd-servers https://192.168.208.12:2379,https://192.168.208.21:2379,https://192.168.208.22:2379 \
  --service-account-key-file ./cert/ca-key.pem \
  --service-cluster-ip-range 192.168.0.0/16 \
  --service-node-port-range 3000-29999 \
  --target-ram-mb=1024 \
  --kubelet-client-certificate ./cert/client.pem \
  --kubelet-client-key ./cert/client-key.pem \
  --log-dir  /data/logs/kubernetes/kube-apiserver \
  --tls-cert-file ./cert/apiserver.pem \
  --tls-private-key-file ./cert/apiserver-key.pem \
  --v 2

步骤4：

将 node01 上配置好的kubernetes 拷贝到 node02中

[root@node01 opt]# scp -r kubernetes.v1.15.11 192.168.208.22:/opt

在 node02上的配置

[root@node02 opt]# ln -s /opt/kubernetes.v1.15.11/ /opt/kubernetes
[root@node02 opt]# cd /opt/kubernetes/server/bin

# 启动 apiserver
[root@node02 bin]# sh kube-apiserver.sh

检查启动服务

node01

[root@node01 cfg]# netstat -luntp |grep kube-apiser
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      18688/./kube-apiser 
tcp6       0      0 :::6443                 :::*                    LISTEN      18688/./kube-apiser
[root@node02 bin]# netstat -luntp |grep kube-apiser
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      18688/./kube-apiser 
tcp6       0      0 :::6443                 :::*                    LISTEN      18688/./kube-apiser

3、搭建反向代理 4层和 7层

image-20200509013712744.png

etcd: 2379 2380 配置节点IP： 192.168.208.11， 192.168.208.12

VIP ：192.168.208.10 来访问 apiserver 的 6443 端口 , 6443 为 kube-aprse 端口

[root@k8s_lb1]# netstat -luntp |grep 6443
tcp6       0      0 :::6443                 :::*                    LISTEN      18688/./kube-apiser

步骤1:

[root@k8s_lb1]# yum install nginx
[root@k8s_lb1]# yum install nginx

配置反向代理
[root@k8s_lb1]# vim /etc/nginx/nginx.conf
# 放在nginx.conf 末尾
stream {
    upstream kube-apiserver {
        server 192.168.208.21:6443     max_fails=3 fail_timeout=30s;
        server 192.168.208.22:6443     max_fails=3 fail_timeout=30s;
    }
    server {
        listen 7443;
        proxy_connect_timeout 2s;
        proxy_timeout 900s;
        proxy_pass kube-apiserver;
    }
}
[root@k8s_lb2]# vim /etc/nginx/nginx.conf
# 放在nginx.conf 末尾
stream {
    upstream kube-apiserver {
        server 192.168.208.21:6443     max_fails=3 fail_timeout=30s;
        server 192.168.208.22:6443     max_fails=3 fail_timeout=30s;
    }
    server {
        listen 7443;
        proxy_connect_timeout 2s;
        proxy_timeout 900s;
        proxy_pass kube-apiserver;
    }
}

[root@k8s_lb1]# systemctl restart nginx
[root@k8s_lb2]# systemctl restart nginx
[root@k8s_lb1]# netstat -luntp |grep nginx
tcp        0      0 0.0.0.0:7443            0.0.0.0:*               LISTEN      19031/nginx: master
[root@k8s_lb2]# netstat -luntp |grep nginx
tcp        0      0 0.0.0.0:7443            0.0.0.0:*               LISTEN      19031/nginx: master

步骤2：

安装 keepalived

[root@k8s_lb1]#  yum install keepalived
[root@k8s_lb2]# yum install keepalived

新建检查端口的脚本

[root@k8s_lb1]# [root@node01 /]# vi /etc/keepalived/check_port.sh
#!/bin/bash
#keepalived 监控端口脚本
#使用方法：
#在keepalived的配置文件中
#vrrp_script check_port {#创建一个vrrp_script脚本,检查配置
#    script "/etc/keepalived/check_port.sh 6379" #配置监听的端口
#    interval 2 #检查脚本的频率,单位（秒）
#}
CHK_PORT=$1
if [ -n "$CHK_PORT" ];then
        PORT_PROCESS=`ss -lnt|grep $CHK_PORT|wc -l`
        if [ $PORT_PROCESS -eq 0 ];then
                echo "Port $CHK_PORT Is Not Used,End."
                exit 1
        fi
else
        echo "Check Port Cant Be Empty!"
fi

[root@node01 /]# chmod a+x /etc/keepalived/check_port.sh
-------------------------------------------------------------------
[root@k8s_lb2]# vi /etc/keepalived/check_port.sh
#!/bin/bash
#keepalived 监控端口脚本
#使用方法：
#在keepalived的配置文件中
#vrrp_script check_port {#创建一个vrrp_script脚本,检查配置
#    script "/etc/keepalived/check_port.sh 6379" #配置监听的端口
#    interval 2 #检查脚本的频率,单位（秒）
#}
CHK_PORT=$1
if [ -n "$CHK_PORT" ];then
        PORT_PROCESS=`ss -lnt|grep $CHK_PORT|wc -l`
        if [ $PORT_PROCESS -eq 0 ];then
                echo "Port $CHK_PORT Is Not Used,End."
                exit 1
        fi
else
        echo "Check Port Cant Be Empty!"
fi
[root@k8s_lb2]# chmod a+x /etc/keepalived/check_port.sh

步骤3：

配置 keepalived 高可用实例

[root@k8s_lb1]#  vi /etc/keepalived/keepalived.conf 
! Configuration File for keepalived
global_defs {
   router_id k8s
}
vrrp_script chk_nginx {
    script "/etc/keepalived/check_port.sh 7443"
    interval 2
    weight -20
}
vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    mcast_src_ip 192.168.208.21
    nopreempt   # 非抢占机制
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        chk_nginx
    }
    virtual_ipaddress {
        192.168.208.10

    }
}

-------------------------------------------------
[root@k8s_lb2]# vi /etc/keepalived/keepalived.conf 
! Configuration File for keepalived
global_defs {
   router_id k8s
}
vrrp_script chk_nginx {
    script "/etc/keepalived/check_port.sh 7443"
    interval 2
    weight -20
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 51
    priority 50
    advert_int 1
    mcast_src_ip 192.168.208.22
    nopreempt  # 非抢占机制
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        chk_nginx
    }
    virtual_ipaddress {
        192.168.208.10

    }
}

[root@k8s_lb1]#  systemctl restart keepalived
[root@k8s_lb2]# systemctl restart keepalived

检查 虚拟IP 是否启动
[root@k8s_lb1]# ip addr
2: ens33:  mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    inet 192.168.208.21/24 brd 192.168.208.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.208.10/32 scope global ens33
       valid_lft forever preferred_lft forever

发现 192.168.208.10 已经启动  高可用实现

要关闭 selinux

4、部署kube-controller-manager

集群规划，，注意这两不用签证书

主机名	角色	ip
node01	controller-manager	192.168.208.21
node02	controller-manager	192.168.208.22

这里部署以 node01 为例， node02 安装部署方法类似

在 node01 上创建启动脚本

[root@node01 bin]# pwd
/opt/kubernetes/server/bin
[root@node01 bin]# ll
总用量 885348
-rwxr-xr-x. 1 root root  43551200 3月  13 05:49 apiextensions-apiserver
drwxr-xr-x. 2 root root       124 5月   8 21:11 cert
-rwxr-xr-x. 1 root root 100655136 3月  13 05:49 cloud-controller-manager
drwxr-xr-x. 2 root root        24 5月   9 01:12 conf
-rwxr-xr-x. 1 root root 200816272 3月  13 05:49 hyperkube
-rwxr-xr-x. 1 root root  40198592 3月  13 05:49 kubeadm
-rwxr-xr-x. 1 root root 164616608 3月  13 05:49 kube-apiserver
-rw-r--r--. 1 root root      1093 5月   9 01:14 kube-apiserver.sh
-rwxr-xr-x. 1 root root 116532256 3月  13 05:49 kube-controller-manager
-rwxr-xr-x. 1 root root  42997792 3月  13 05:49 kubectl
-rwxr-xr-x. 1 root root 119755824 3月  13 05:49 kubelet
-rwxr-xr-x. 1 root root  36995680 3月  13 05:49 kube-proxy
-rwxr-xr-x. 1 root root  38794336 3月  13 05:49 kube-scheduler
-rwxr-xr-x. 1 root root   1648224 3月  13 05:49 mounter


[root@node01 bin]# mkdir -p /data/logs/kubernetes/
[root@node01 bin]# vim kube-controller-manager.sh
#!/bin/sh
./kube-controller-manager \
  --cluster-cidr 172.7.0.0/16 \
  --leader-elect true \
  --log-dir /data/logs/kubernetes/kube-controller-manager \
  --master http://127.0.0.1:8080 \
  --service-account-private-key-file ./cert/ca-key.pem \
  --service-cluster-ip-range 192.168.0.0/16 \
  --root-ca-file ./cert/ca.pem \
  --v 2
  
  [root@node01 bin]#chmod a+x kube-controller-manager.sh
  [root@node02 bin]# mkdir -p /data/logs/kubernetes/kube-controller-manager
#将相同的脚本拷贝给 node02
[root@node01 bin]# scp kube-controller-manager.sh 192.168.208.22:/opt/kubernetes/server/bin

在node02上操作

[root@node02 /]# cd /opt/kubernetes/server/bin/
[root@node02 bin]# pwd
/opt/kubernetes/server/bin
[root@node02 bin]# ll
总用量 885352
-rwxr-xr-x. 1 root root  43551200 5月   9 01:16 apiextensions-apiserver
drwxr-xr-x. 2 root root       124 5月   9 01:17 cert
-rwxr-xr-x. 1 root root 100655136 5月   9 01:17 cloud-controller-manager
drwxr-xr-x. 2 root root        24 5月   9 01:21 conf
-rwxr-xr-x. 1 root root 200816272 5月   9 01:17 hyperkube
-rwxr-xr-x. 1 root root  40198592 5月   9 01:17 kubeadm
-rwxr-xr-x. 1 root root 164616608 5月   9 01:17 kube-apiserver
-rwxr-xr-x. 1 root root      1093 5月   9 01:17 kube-apiserver.sh
-rwxr-xr-x. 1 root root 116532256 5月   9 01:17 kube-controller-manager
-rwxr-xr-x. 1 root root       334 5月   9 12:14 kube-controller-manager.sh
-rwxr-xr-x. 1 root root  42997792 5月   9 01:17 kubectl
-rwxr-xr-x. 1 root root 119755824 5月   9 01:17 kubelet
-rwxr-xr-x. 1 root root  36995680 5月   9 01:17 kube-proxy
-rwxr-xr-x. 1 root root  38794336 5月   9 01:17 kube-scheduler
-rwxr-xr-x. 1 root root   1648224 5月   9 01:17 mounter
[root@node02 bin]# mkdir -p /data/logs/kubernetes/
[root@node02 bin]# mkdir -p /data/logs/kubernetes/kube-controller-manager

然后启动这两脚本就可以了

supervsorctl 启动

[program:kube-controller-manager-208-22]
command=/usr/bin/sh /opt/kubernetes/server/bin/kube-controller-manager.sh                     ; the program (relative uses PATH, can take args)
numprocs=1                                                                        ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin                                              ; directory to cwd to before exec (def no cwd)
autostart=true                                                                    ; start at supervisord start (default: true)
autorestart=true                                                                  ; retstart at unexpected quit (default: true)
startsecs=30                                                                      ; number of secs prog must stay running (def. 1)
startretries=3                                                                    ; max # of serial start failures (default 3)
exitcodes=0,2                                                                     ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT                                                                   ; signal used to kill process (default TERM)
stopwaitsecs=10                                                                   ; max num secs to wait b4 SIGKILL (default 10)
user=root                                                                         ; setuid to this UNIX account to run the program
redirect_stderr=true                                                              ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-controller-manager/controller.stdout.log  ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB                                                      ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4                                                          ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB                                                       ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false                                                       ; emit events on stdout writes (default false)

[root@lb002 bin]# supervisorctl update
kube-controller-manager-208-22: added process group
[root@lb002 bin]# 
[root@lb002 bin]# supervisorctl status
etcd-server-208-22               RUNNING   pid 13331, uptime 3:23:13
kube-apiserver-7-21              RUNNING   pid 13998, uptime 2:44:22
kube-controller-manager-208-22   STARTING

5、部署 kube-scheduler

和 controller-manager 一样不需要签证书因为是找本机的 api-server

主机名	角色	ip
node01	controller-scheduler	192.168.208.21
node02	controller-scheduler	192.168.208.22

这里部署以 node01 为例， node02 安装部署方法类似

root@node01 ~]# cd /opt/kubernetes/server/bin/
[root@node01 bin]# ll
总用量 885352
-rwxr-xr-x. 1 root root  43551200 3月  13 05:49 apiextensions-apiserver
drwxr-xr-x. 2 root root       124 5月   8 21:11 cert
-rwxr-xr-x. 1 root root 100655136 3月  13 05:49 cloud-controller-manager
drwxr-xr-x. 2 root root        24 5月   9 01:12 conf
-rwxr-xr-x. 1 root root 200816272 3月  13 05:49 hyperkube
-rwxr-xr-x. 1 root root  40198592 3月  13 05:49 kubeadm
-rwxr-xr-x. 1 root root 164616608 3月  13 05:49 kube-apiserver
-rw-r--r--. 1 root root      1093 5月   9 01:14 kube-apiserver.sh
-rwxr-xr-x. 1 root root 116532256 3月  13 05:49 kube-controller-manager
-rwxr-xr-x. 1 root root       334 5月   9 12:11 kube-controller-manager.sh
-rwxr-xr-x. 1 root root  42997792 3月  13 05:49 kubectl
-rwxr-xr-x. 1 root root 119755824 3月  13 05:49 kubelet
-rwxr-xr-x. 1 root root  36995680 3月  13 05:49 kube-proxy
-rwxr-xr-x. 1 root root  38794336 3月  13 05:49 kube-scheduler
-rwxr-xr-x. 1 root root   1648224 3月  13 05:49 mounter

# 创建启动脚本
[root@node01 bin]# vim kube-scheduler.sh
#!/bin/sh
./kube-scheduler \
  --leader-elect  \
  --log-dir /data/logs/kubernetes/kube-scheduler \
  --master http://127.0.0.1:8080 \   
  --v 2
  
[root@node01 bin]#mkdir -p  /data/logs/kubernetes/kube-scheduler
[root@node01 bin]# 
[root@node01 bin]# chmod a+x kube-scheduler.sh 

#拷贝到 node02节点
[root@node01 bin]# scp kube-scheduler.sh 192.168.208.22:/opt/kubernetes/server/bin/

在 node02 上的操作

root@node02 ~]# cd /opt/kubernetes/server/bin/
[root@node02 bin]# ll
总用量 885352
-rwxr-xr-x. 1 root root  43551200 3月  13 05:49 apiextensions-apiserver
drwxr-xr-x. 2 root root       124 5月   8 21:11 cert
-rwxr-xr-x. 1 root root 100655136 3月  13 05:49 cloud-controller-manager
drwxr-xr-x. 2 root root        24 5月   9 01:12 conf
-rwxr-xr-x. 1 root root 200816272 3月  13 05:49 hyperkube
-rwxr-xr-x. 1 root root  40198592 3月  13 05:49 kubeadm
-rwxr-xr-x. 1 root root 164616608 3月  13 05:49 kube-apiserver
-rw-r--r--. 1 root root      1093 5月   9 01:14 kube-apiserver.sh
-rwxr-xr-x. 1 root root 116532256 3月  13 05:49 kube-controller-manager
-rwxr-xr-x. 1 root root       334 5月   9 12:11 kube-controller-manager.sh
-rwxr-xr-x. 1 root root  42997792 3月  13 05:49 kubectl
-rwxr-xr-x. 1 root root 119755824 3月  13 05:49 kubelet
-rwxr-xr-x. 1 root root  36995680 3月  13 05:49 kube-proxy
-rwxr-xr-x. 1 root root  38794336 3月  13 05:49 kube-scheduler
-rwxr-xr-x. 1 root root       143 5月   9 12:30 kube-scheduler.sh
-rwxr-xr-x. 1 root root   1648224 3月  13 05:49 mounter

[root@node02 bin]#mkdir -p  /data/logs/kubernetes/kube-scheduler

启动脚本 sh kube-scheduler.sh

这里使用 supervsiorctl

启动

[root@lb002 bin]# vi /etc/supervisord.d/kube-scheduler.ini      

[program:scheduler-208-22]
command=/usr/bin/sh /opt/kubernetes/server/bin/kube-scheduler.sh                     ; the program (relative uses PATH, can take args)
numprocs=1                                                               ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin                                     ; directory to cwd to before exec (def no cwd)
autostart=true                                                           ; start at supervisord start (default: true)
autorestart=true                                                         ; retstart at unexpected quit (default: true)
startsecs=30                                                             ; number of secs prog must stay running (def. 1)
startretries=3                                                           ; max # of serial start failures (default 3)
exitcodes=0,2                                                            ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT                                                          ; signal used to kill process (default TERM)
stopwaitsecs=10                                                          ; max num secs to wait b4 SIGKILL (default 10)
user=root                                                                ; setuid to this UNIX account to run the program
redirect_stderr=true                                                     ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-scheduler/scheduler.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB                                             ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4                                                 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB                                              ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false                                              ; emit events on stdout writes (default false)

[root@node001 bin]# supervisorctl status
etcd-server-208-21               RUNNING   pid 15493, uptime 3:37:12
kube-apiserver-208-21            RUNNING   pid 16089, uptime 2:52:09
kube-controller-manager-208-22   RUNNING   pid 17631, uptime 0:07:01
scheduler-208-21                 STARTING

此时可以检查集群状态了

创建命令软链接

[root@node01 ~]# ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl
[root@node02 ~]# ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl

检查集群健康状态

[root@node01 ~]# kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
etcd-2               Healthy   {"health": "true"}   
scheduler            Healthy   ok                   
etcd-0               Healthy   {"health": "true"}   
controller-manager   Healthy   ok                   
etcd-1               Healthy   {"health": "true"}

[root@node02 ~]# kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
etcd-2               Healthy   {"health": "true"}   
etcd-1               Healthy   {"health": "true"}   
etcd-0               Healthy   {"health": "true"}   
scheduler            Healthy   ok                   
controller-manager   Healthy   ok

到这里集群的就部署完成了

计算节点服务搭建

1、部署 node节点kubelet

集群规则

主机名	角色	ip
node01	kubelet	192.168.208.21
node02	kubelet	192.168.208.22

先在 node01上部署 kubelet服务要求有 ca.pem server.pem kubelte.pem

步骤1：在CA服务器上签发证书

生成证书：

vi kubelet-csr.json
{
    "CN": "k8s-kubelet",
    "hosts": [
    "127.0.0.1",
    "192.168.208.21",
    "192.168.208.22",
    "192.168.208.23",
    "192.168.208.24"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "od",
            "OU": "ops"
        }
    ]
}

[ certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server kubelet-csr.json | cfssl-json -bare kubelet

1、生成kubectl.kubeconfig 配置文件

先拷贝证书

[root@CA-Host certs]# scp kubelet.pem kubelet-key.pem node001:/opt/kubernetes/server/bin/cert
root@node001's password: 
kubelet.pem                                                                                                                 100% 1476    68.0KB/s   00:00    
kubelet-key.pem                                                                                                             100% 1679   211.0KB/s   00:00    
[root@CA-Host certs]# scp kubelet.pem kubelet-key.pem node002:/opt/kubernetes/server/bin/cert
root@node002's password: 
kubelet.pem                                                                                                                 100% 1476     1.6MB/s   00:00    
kubelet-key.pem                                                                                                             100% 1679     1.4MB/s   00:00

进入到 conf 目录生成配置文件 4步骤

#1、set-cluster
[root@lb002 conf]# pwd
/opt/kubernetes/server/bin/conf
[root@lb002 conf]# kubectl config set-cluster myk8s \
   --certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem \
   --embed-certs=true \
   --server=https://192.168.208.10:7443 \
   --kubeconfig=kubelet.kubeconfig
Cluster "myk8s" set.
[root@lb002 conf]# ls
audit.yaml  kubelet.kubeconfig

#2 、set-credentials

[root@lb002 conf]# kubectl config set-credentials k8s-node --client-certificate=/opt/kubernetes/server/bin/cert/client.pem --client-key=/opt/kubernetes/server/bin/cert/client-key.pem --embed-certs=true --kubeconfig=kubelet.kubeconfig 

User "k8s-node" set.

#3、set-context
 
[root@lb002 conf]# kubectl config set-context myk8s-context \
  --cluster=myk8s \
  --user=k8s-node \
  --kubeconfig=kubelet.kubeconfig

#4、use-context

[root@lb002 conf]#kubectl config use-context myk8s-context --kubeconfig=kubelet.kubeconfig

2、创建 k8s-node.yaml 资源配置文件

[root@lb002 conf]# vi k8s-node.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: k8s-node
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:node
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: User
  name: k8s-node

生成 k8s-node 的用户  让他拥有集群计算权限(clusterrolebinding)
[root@lb002 conf]# kubectl create -f k8s-node.yaml
clusterrolebinding.rbac.authorization.k8s.io/k8s-node created

查询用户
[root@lb002 conf]# kubectl get clusterrolebinding k8s-node
NAME       AGE
k8s-node   93s

......

6、将上面生成的 kubelet.kubeconfig 拷贝到 node02节点目录下

[root@node01 conf]# scp kubelet.kubeconfig 192.168.208.22://opt/kubernetes/server/bin/conf

7、在 node02上查看

[root@node02 conf]# ll
总用量 12
-rw-r--r--. 1 root root 2289 5月   9 01:17 audit.yaml
-rw-------. 1 root root 6212 5月   9 13:38 kubelet.kubeconfig

这里不需要再创建 k8s-node 资源了， 已经存在了

8、创建 kubelet启动脚本

1.1：准备 pause基础镜像

主运维主机上 CA-Host 192.168.208.200 主机上操作

下载pause基础镜像重新打标签上传到 harbor

[root@CA-Host certs]# docker pull kubernetes/pause
[root@CA-Host certs]# docker images |grep kubernetes/pause
[root@CA-Host certs]# docker tag kubernetes/pause:latest 192.168.208.200/public/pause:latest
[root@CA-Host certs]# docker login http://192.168.208.200/public  #admin/123456
[root@CA-Host certs]# docker push 192.168.208.200/public/pause:latest

image-20200509135618865.png

用于业务容器初始化网络空间 ipc空间 utf 空间

1.2、node01创建 kubelte 启动脚本

[root@node01 bin]# pwd
/opt/kubernetes/server/bin
[root@node01 bin]# vim kubelet.sh
#!/bin/sh
./kubelet \
  --anonymous-auth=false \
  --cgroup-driver systemd \
  --cluster-dns 192.168.0.2 \
  --cluster-domain cluster.local \
  --runtime-cgroups=/systemd/system.slice \
  --kubelet-cgroups=/systemd/system.slice \
  --fail-swap-on="false" \
  --client-ca-file ./cert/ca.pem \
  --tls-cert-file ./cert/kubelet.pem \
  --tls-private-key-file ./cert/kubelet-key.pem \
  --hostname-override node01 \    #指定本机主机名
  --image-gc-high-threshold 20 \
  --image-gc-low-threshold 10 \
  --kubeconfig ./conf/kubelet.kubeconfig \
  --log-dir /data/logs/kubernetes/kube-kubelet \
  --pod-infra-container-image 192.168.208.200/public/pause:latest \  #指定启动基础镜像
  --root-dir /data/kubelet

改权限创建配置文件启动需要的目录

[root@node01 bin]# chmod +x /opt/kubernetes/server/bin/kubelet.sh 
[root@node01 bin]# mkdir -p /data/logs/kubernetes/kube-kubelet   /data/kubelet

1.3 创建 node02的 kubelet 启动脚本

[root@node02 bin]# pwd
/opt/kubernetes/server/bin
[root@node02 bin]# vim kubelet.sh
#!/bin/sh
./kubelet \
  --anonymous-auth=false \
  --cgroup-driver systemd \
  --cluster-dns 192.168.0.2 \
  --cluster-domain cluster.local \
  --runtime-cgroups=/systemd/system.slice --kubelet-cgroups=/systemd/system.slice \
  --fail-swap-on="false" \
  --client-ca-file ./cert/ca.pem \
  --tls-cert-file ./cert/kubelet.pem \
  --tls-private-key-file ./cert/kubelet-key.pem \
  --hostname-override 192.168.208.22 \
  --image-gc-high-threshold 20 \
  --image-gc-low-threshold 10 \
  --kubeconfig ./conf/kubelet.kubeconfig \
  --log-dir /data/logs/kubernetes/kube-kubelet \
  --pod-infra-container-image harbor.od.com/public/pause:latest \
  --root-dir /data/kubelet

改权限创建配置文件启动需要的目录

[root@node02 bin]# chmod +x /opt/kubernetes/server/bin/kubelet.sh 
[root@node02 bin]# mkdir -p /data/logs/kubernetes/kube-kubelet   /data/kubelet

1.4 启动 kubelet.sh

这里使用 supervsiorctl 启动

[root@node002 bin]# cat /etc/supervisord.d/kube-kubelet.ini 
[program:kube-kubelet-208-22]
command=/usr/bin/sh /opt/kubernetes/server/bin/kubelet.sh     ; the program (relative uses PATH, can take args)
numprocs=1                                        ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin              ; directory to cwd to before exec (def no cwd)
autostart=true                                    ; start at supervisord start (default: true)
autorestart=true                                  ; retstart at unexpected quit (default: true)
startsecs=30                                      ; number of secs prog must stay running (def. 1)
startretries=3                                    ; max # of serial start failures (default 3)
exitcodes=0,2                                     ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT                                   ; signal used to kill process (default TERM)
stopwaitsecs=10                                   ; max num secs to wait b4 SIGKILL (default 10)
user=root                                         ; setuid to this UNIX account to run the program
redirect_stderr=true                              ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-kubelet/kubelet.stdout.log   ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB                      ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4                          ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB                       ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false                       ; emit events on stdout writes (default false)

启动

[root@node002 bin]# supervisorctl update
[root@node002 bin]# supervisorctl status
etcd-server-208-22               RUNNING   pid 13331, uptime 4:20:24
kube-apiserver-7-21              RUNNING   pid 13998, uptime 3:41:33
kube-controller-manager-208-22   RUNNING   pid 15506, uptime 0:57:15
kube-kubelet-208-22              STARTING  
scheduler-208-22                 RUNNING   pid 15626, uptime 0:49:14

另一个节点一样，将启动配置文件拷过去，执行启动

-rwxr-xr-x. 1 root root   1648224 3月  13 05:49 mounter
[root@node002 bin]# scp kubelet.sh node001:/opt/kubernetes/server/bin/
root@node001's password: 
kubelet.sh         

修改 kubelet.sh 的主机IP地址

[root@node002 bin]# scp -r /etc/supervisord.d/kube-kubelet.ini node001:/etc/supervisord.d/ 
root@node001's password: 
kube-kubelet.ini    

修改名 ini 的名称信息
[root@node001 bin]# vim /etc/supervisord.d/kube-kubelet.ini
[program:kube-kubelet-208-21]

启动
[root@node001 bin]# supervisorctl update
kube-kubelet-208-21: added process group
[root@node001 bin]#
[root@node001 bin]# supervisorctl status
etcd-server-208-21               RUNNING   pid 15493, uptime 4:30:39
kube-apiserver-208-21            RUNNING   pid 16089, uptime 3:45:36
kube-controller-manager-208-22   RUNNING   pid 17631, uptime 1:00:28
kube-kubelet-208-21              STARTING
scheduler-208-21                 RUNNING   pid 17743, uptime 0:53:34

验证集群节点：

[root@node01 ~]# kubectl get nodes
NAME     STATUS   ROLES    AGE     VERSION
node01   Ready       10m     v1.15.11
node02   Ready       9m22s   v1.15.11
[root@node02 ~]# kubectl get nodes
NAME     STATUS   ROLES    AGE     VERSION
node01   Ready       10m     v1.15.11
node02   Ready       9m22s   v1.15.11

更改 ROLES 信息这里是个 labe 随便改的

[root@node01 ~]# kubectl label node node01 node-role.kubernetes.io/master=
node/node01 labeled
[root@node01 ~]# kubectl get nodes
NAME     STATUS   ROLES    AGE   VERSION
node01   Ready    master   15m   v1.15.11
node02   Ready       15m   v1.15.11

[root@node01 ~]# kubectl label node node01 node-role.kubernetes.io/node=  
node/node01 labeled
[root@node01 ~]# kubectl get nodes
NAME     STATUS   ROLES         AGE   VERSION
node01   Ready    master,node   16m   v1.15.11
node02   Ready            15m   v1.15.11

启动报错如下：

failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs"

解决方法：
检查 /etc/docker/daemon.json
native.cgroupdriver=systemd  配置  报错原因是 native 写成了 vative
{
  "graph": "/data/docker",
  "storage-driver": "overlay2",
  "insecure-registries": ["registry.access.redhat.com","192.168.208.200"],
  "registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
  "bip": "172.7.21.1/24",
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true
}

2、部署node节点的kube-proxy

proxy 用于连接 pod 和集群网络

主机名	角色	IP地址
node01	kube-proxy	192.168.208.21
node02	kube-proxy	192.168.208..22

通信需要使用证书

在 ca-host 上操作 192.168.208.200

1、创建证书文件

[root@CA-Host certs]# pwd
/opt/certs
[root@CA-Host certs]# vi kube-proxy-csr.json
{
    "CN": "system:kube-proxy",    #  这里就是这样写的， 不能改
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "guangdong",
            "L": "shengzheng",
            "O": "tj",
            "OU": "ops"
        }
    ]
}

2、执行创建证书

[root@CA-Host certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client kube-proxy-csr.json |cfssl-json -bare kube-proxy-client
[root@CA-Host certs]# ll
总用量 100
-rw-r--r--. 1 root root 1257 5月   8 20:54 apiserver.csr
-rw-r--r--. 1 root root  488 5月   8 20:52 apiserver-csr.json
-rw-------. 1 root root 1679 5月   8 20:54 apiserver-key.pem
-rw-r--r--. 1 root root 1606 5月   8 20:54 apiserver.pem
-rw-r--r--. 1 root root  654 5月   8 15:24 ca-config.json
-rw-r--r--. 1 root root  997 5月   7 14:06 ca.csr
-rw-r--r--. 1 root root  221 5月   7 14:02 ca-csr.json
-rw-------. 1 root root 1679 5月   7 14:06 ca-key.pem
-rw-r--r--. 1 root root 1346 5月   7 14:06 ca.pem
-rw-r--r--. 1 root root 1001 5月   8 20:40 client.csr
-rw-r--r--. 1 root root  190 5月   8 20:37 client-csr.json
-rw-------. 1 root root 1679 5月   8 20:40 client-key.pem
-rw-r--r--. 1 root root 1371 5月   8 20:40 client.pem
-rw-r--r--. 1 root root 1070 5月   8 15:43 etcd-peer.csr
-rw-r--r--. 1 root root  266 5月   8 15:38 etcd-peer-csr.json
-rw-------. 1 root root 1675 5月   8 15:43 etcd-peer-key.pem
-rw-r--r--. 1 root root 1436 5月   8 15:43 etcd-peer.pem
-rw-r--r--. 1 root root 1123 5月   9 12:59 kubelet.csr
-rw-r--r--. 1 root root  502 5月   9 12:57 kubelet-csr.json
-rw-------. 1 root root 1679 5月   9 12:59 kubelet-key.pem
-rw-r--r--. 1 root root 1476 5月   9 12:59 kubelet.pem
-rw-r--r--. 1 root root 1013 5月   9 15:28 kube-proxy-client.csr
-rw-------. 1 root root 1675 5月   9 15:28 kube-proxy-client-key.pem
-rw-r--r--. 1 root root 1383 5月   9 15:28 kube-proxy-client.pem
-rw-r--r--. 1 root root  272 5月   9 15:26 kube-proxy-csr.json

3、分发证书

将 kube-proxy-client.pem kube-proxy-client-key.pem 分发到节点中 /opt/kubernetes/server/bin/cert

[root@CA-Host#]scp kube-proxy-client.pem 192.168.208.21:/opt/kubernetes/server/bin/cert   
[root@CA ] scp kube-proxy-client-key.pem 192.168.208.21:/opt/kubernetes/server/bin/cert
[root@CA ] scp kube-proxy-client.pem 192.168.208.22:/opt/kubernetes/server/bin/cert
[root@CA ] scp kube-proxy-client-key.pem 192.168.208.22:/opt/kubernetes/server/bin/cert

4、在 node01 node02 节点上创建配置文件

node01

[root@node01 conf]# pwd
/opt/kubernetes/server/bin/conf

#set-cluster
[root@node01 conf]# kubectl config set-cluster myk8s \
--certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem \
--embed-certs=true \
--server=https://192.168.208.10:7443 \
--kubeconfig=kube-proxy.kubeconfig

#set-credentials
[root@node01 conf]# kubectl config set-credentials kube-proxy \
  --client-certificate=/opt/kubernetes/server/bin/cert/kube-proxy-client.pem \
  --client-key=/opt/kubernetes/server/bin/cert/kube-proxy-client-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig

#set-context
[root@node01 conf]# kubectl config set-context myk8s-context \
--cluster=myk8s \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig

#use-context
[root@node01 conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig

查看生成的 kube-proxy.kubeconfig 配置文件
[root@node01 conf]# ll
总用量 24
-rw-r--r--. 1 root root 2289 5月   9 01:11 audit.yaml
-rw-r--r--. 1 root root  258 5月   9 13:31 k8s-node.yaml
-rw-------. 1 root root 6212 5月   9 13:28 kubelet.kubeconfig
-rw-------. 1 root root 6228 5月   9 15:45 kube-proxy.kubeconfig

5、将生成的 kube-proxy.kubeconfig 配置文件拷贝到 node02

[root@node01 conf]# pwd
/opt/kubernetes/server/bin/conf
[root@node01 conf]# 
scp kube-proxy.kubeconfig 192.168.208.22:/opt/kubernetes/server/bin/conf

6、使用 ipvs 调度流量

[root@node01 ~]# vim ipvs.sh

#!/bin/bash
ipvs_mods_dir="/usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs"
for i in $(ls $ipvs_mods_dir|grep -o "^[^.]*")
do
  /sbin/modinfo -F filename $i &>/dev/null
  if [ $? -eq 0 ];then
    /sbin/modprobe $i
  fi
done
[root@node01 ~]# chmod a+x ipvs.sh 
[root@node01 ~]# sh ipvs.sh 
[root@node01 ~]# lsmod |grep ip_vs
ip_vs_wrr              12697  0 
ip_vs_wlc              12519  0 
ip_vs_sh               12688  0 
ip_vs_sed              12519  0 
ip_vs_rr               12600  0 
ip_vs_pe_sip           12740  0 
nf_conntrack_sip       33860  1 ip_vs_pe_sip
ip_vs_nq               12516  0 
ip_vs_lc               12516  0 
ip_vs_lblcr            12922  0

7、将脚本拷到 192.168.208.22 node02

[root@node01 ~]# scp ipvs.sh 192.168.208.22:/root/

node02
[root@node02 ~]# sh ipvs.sh 
[root@node02 ~]# lsmod |grep ip_vs
ip_vs_wrr              12697  0     #加权轮询
ip_vs_wlc              12519  0     #最短连接
ip_vs_sh               12688  0 
ip_vs_sed              12519  0 
ip_vs_rr               12600  0 
ip_vs_pe_sip           12740  0 
nf_conntrack_sip       33860  1 ip_vs_pe_sip
ip_vs_nq               12516  0 
ip_vs_lc               12516  0

8、最后创建启动脚本文件

node01:
[root@node01 bin]# pwd
/opt/kubernetes/server/bin
[root@node01 bin]# vim kube-proxy.sh

#!/bin/sh
./kube-proxy \
  --cluster-cidr 172.7.0.0/16 \
  --hostname-override node01 \
  --proxy-mode=ipvs \
  --ipvs-scheduler=nq \
  --kubeconfig ./conf/kube-proxy.kubeconfig
[root@node01 bin]#chmod a+x kube-proxy.sh
[root@node01 bin]#mkdir -p /data/logs/kubernetes/kube-proxy

node02:
[root@node02 bin]# pwd
/opt/kubernetes/server/bin
[root@node02 bin]# vim kube-proxy.sh
#!/bin/sh
./kube-proxy \
  --cluster-cidr 172.7.0.0/16 \
  --hostname-override node02 \
  --proxy-mode=ipvs \
  --ipvs-scheduler=nq \
  --kubeconfig ./conf/kube-proxy.kubeconfig
[root@node02 bin]#chmod a+x kube-proxy.sh
[root@node02 bin]#mkdir -p /data/logs/kubernetes/kube-proxy

启动执行脚本

sh kube-proxy.sh

使用 supervsorctl启动

[root@node002 bin]# cat /etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-208-22]
command=/usr/bin/sh /opt/kubernetes/server/bin/kube-proxy.sh                     ; the program (relative uses PATH, can take args)
numprocs=1                                                           ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin                                 ; directory to cwd to before exec (def no cwd)
autostart=true                                                       ; start at supervisord start (default: true)
autorestart=true                                                     ; retstart at unexpected quit (default: true)
startsecs=30                                                         ; number of secs prog must stay running (def. 1)
startretries=3                                                       ; max # of serial start failures (default 3)
exitcodes=0,2                                                        ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT                                                      ; signal used to kill process (default TERM)
stopwaitsecs=10                                                      ; max num secs to wait b4 SIGKILL (default 10)
user=root                                                            ; setuid to this UNIX account to run the program
redirect_stderr=true                                                 ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-proxy/proxy.stdout.log     ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB                                         ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4                                             ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB                                          ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false                                          ; emit events on stdout writes (default false)

启动

[root@node002 bin]# supervisorctl update
kube-proxy-208-22: added process group
[root@node002 bin]# supervisorctl status
etcd-server-208-22               RUNNING   pid 13331, uptime 4:41:52
kube-apiserver-7-21              RUNNING   pid 13998, uptime 4:03:01
kube-controller-manager-208-22   RUNNING   pid 15506, uptime 1:18:43
kube-kubelet-208-22              RUNNING   pid 16520, uptime 0:21:31
kube-proxy-208-22                STARTING  
scheduler-208-22                 RUNNING   pid 15626, uptime 1:10:42

将启动配置文件拷到另一个节点

更改配置文件名称

[root@node001 bin]# vim /etc/supervisord.d/kube-proxy.ini
[root@node001 bin]# cat /etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-208-21]

执行第二个节点的启动

[root@node001 bin]# supervisorctl update
kube-proxy-208-21: added process group
[root@node001 bin]# supervisorctl status
etcd-server-208-21               RUNNING   pid 15493, uptime 4:48:58
kube-apiserver-208-21            RUNNING   pid 16089, uptime 4:03:55
kube-controller-manager-208-22   RUNNING   pid 17631, uptime 1:18:47
kube-kubelet-208-21              RUNNING   pid 20696, uptime 0:08:32
kube-proxy-208-21                RUNNING   pid 22309, uptime 0:01:29
scheduler-208-21                 RUNNING   pid 17743, uptime 1:11:53

9、安装 ipvsadm 使用 ipvs 调度流量

[root@node02 ~]# yum install ipvsadm
[root@node02 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.0.1:443 nq
  -> 192.168.208.21:6443          Masq    1      0          0         
  -> 192.168.208.22:6443          Masq    1      0          0

[root@node01 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.0.1:443 nq
  -> 192.168.208.21:6443          Masq    1      0          0         
  -> 192.168.208.22:6443          Masq    1      0          0         
[root@node01 ~]

已经对 21,22 节点上的 6443 进行调度

10、验证集群运行状态

[root@node002 bin]# kubectl get nodes
NAME             STATUS   ROLES    AGE   VERSION
192.168.208.21   Ready       10m   v1.15.11
192.168.208.22   Ready       25m   v1.15.11

集群节点需要登陆下 harbor ，docker login 192.168.208.200/public # admin/123456

1、下载nginx镜像  上传到 harbor
[root@CA-Host certs]# docker pull nginx
[root@CA-Host certs]# docker tag 602e111c06b6 192.168.208.200/public/nginx:latest
[root@CA-Host certs]# docker push 192.168.208.200/public/nginx:latest

2、编写资源配置清单
[root@node01 ~]# vim nginx-ds.yml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: nginx-ds
spec:
  template:
    metadata:
      labels:
        app: nginx-ds
    spec:
      containers:
      - name: my-nginx
        image: 192.168.208.200/public/nginx:latest
        ports:
        - containerPort: 80
        
[root@node01 ~]# kubectl create -f nginx-ds.yml 
daemonset.extensions/nginx-ds created        
[root@node01 ~]# kubectl get pods
NAME             READY   STATUS    RESTARTS   AGE
nginx-ds-zf7hv   1/1     Running   0          11m
nginx-ds-ztcgn   1/1     Running   0          11m  
[root@node01 ~]# kubectl get pods -o wide
NAME             READY   STATUS    RESTARTS   AGE   IP           NODE     NOMINATED NODE   READINESS GATES
nginx-ds-zf7hv   1/1     Running   0          12m   172.7.21.2   node01              
nginx-ds-ztcgn   1/1     Running   0          12m   172.7.22.2   node02

集群验证成功了 nginx 跑起来了

总结：

基础环境： centos 7.6 内核 3.8以上

关闭selinux

时间同步

调整epeo源

内核优化 (文件描述符大小内核转发)

安装 bind dns

安装 docker 和 harbor

k8s:

etcd集群

apisever

contorller-manager

scheduler

kubelet

kube-proxy

证书相关，查看证书过期时间

[root@CA-Host certs]# cfssl-certinfo -cert apiserver.pem
{
  "subject": {
    "common_name": "k8s-apiserver",
    "country": "CN",
    "organization": "tj",
    "organizational_unit": "ops",
    "locality": "shengzheng",
    "province": "guangdong",
    "names": [
      "CN",
      "guangdong",
      "shengzheng",
      "tj",
      "ops",
      "k8s-apiserver"
    ]
  },
  "issuer": {
    "common_name": "Tjcom",
    "country": "CN",
    "organization": "tj",
    "organizational_unit": "ops",
    "locality": "shengzheng",
    "province": "guangdong",
    "names": [
      "CN",
      "guangdong",
      "shengzheng",
      "tj",
      "ops",
      "Tjcom"
    ]
  },
  "serial_number": "406292899824335029439592092319769160797618648263",
  "sans": [
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local",
    "127.0.0.1",
    "192.168.0.1",
    "192.168.208.10",
    "192.168.208.21",
    "192.168.208.22",
    "192.168.208.23"
  ],
  "not_before": "2020-05-08T12:50:00Z",      #签发时间   
  "not_after": "2040-05-03T12:50:00Z",       #证书过期时间
  "sigalg": "SHA256WithRSA",
  "authority_key_id": "FC:F5:C0:6E:ED:50:8F:51:FF:93:FB:8D:29:C2:AD:D7:8E:78:1B:43",
  "subject_key_id": "D4:8E:CA:0:58:1E:5D:F5:D4:6D:1B:68:C9:2F:A4:31:B2:75:7E:F6",

}

查看其它的域名证书
[root@CA-Host certs]# cfssl-certinfo -domain www.baidu.com

从配置文件中反解证书

/opt/kubernetes/server/bin/conf
[root@node01 conf]# ll
总用量 24
-rw-r--r--. 1 root root 2289 5月   9 01:11 audit.yaml
-rw-r--r--. 1 root root  258 5月   9 13:31 k8s-node.yaml
-rw-------. 1 root root 6212 5月   9 13:28 kubelet.kubeconfig
-rw-------. 1 root root 6228 5月   9 15:45 kube-proxy.kubeconfig
cat kubelet.kubeconfig
把证书单独拿出来 client-certificate-data
echo client-certificate-data 的证书 |base64 -d  >123.pem
拷到 200的机器上可以查看
[root@CA-Host tool]# cfssl-certinfo -cert 123.pem

证书过期， kubeconfig kube-proxy 配置文件要重新生成证书也要替换

k8s源码部署01

集群搭建：

1、实验环境规划和集群节点初始化

CA证书机构

2、准备证书环境

3、准备 docker环境：所有服务节点都安装

4、在管理主机上准备 harbot私有仓库

开始安装k8s

1、部署etcd集群

步骤1：在 200节点上创建 etcd 证书文件

步骤2：在第一台要安装的机器上安装 etcd ,192.168.208.12

步骤3:将部署好的etcd 拷贝到其它节点

2、部署 k8s api-server

步骤1：

步骤2：

步骤3：

步骤4：

3、搭建反向代理 4层和 7层

步骤1:

步骤2：

步骤3：

4、部署kube-controller-manager

5、部署 kube-scheduler

计算节点服务搭建

1、部署 node节点kubelet

步骤1：在CA服务器上签发证书

2、部署node节点的kube-proxy

你可能感兴趣的:(k8s源码部署01)

k8s源码部署01

集群搭建：

1、 实验环境规划和集群节点初始化

CA证书机构

2、准备证书环境

3、准备 docker环境： 所有服务节点都安装

4、在 管理主机上准备 harbot私有仓库

开始安装k8s

1、部署etcd集群

步骤1：在 200节点上创建 etcd 证书文件

步骤2：在第一台要安装的机器上安装 etcd ,192.168.208.12

步骤3:将部署好的etcd 拷贝到其它节点

2、部署 k8s api-server

步骤1：

步骤2：

步骤3：

步骤4：

3、搭建反向代理 4层和 7层

步骤1:

步骤2：

步骤3：

4、部署kube-controller-manager

5、部署 kube-scheduler

计算节点服务搭建

1、部署 node节点kubelet

步骤1：在CA服务器上签发证书

2、部署node节点的kube-proxy

你可能感兴趣的:(k8s源码部署01)

1、实验环境规划和集群节点初始化

3、准备 docker环境：所有服务节点都安装

4、在管理主机上准备 harbot私有仓库