在Centos7下源码搭建k8s集群

一、环境

1. 总体架构
2. 虚机环境
3. 网络配置之前已有教程https://editor.csdn.net/md/?articleId=105495302
4. 关闭防火墙和selinux
5. 各虚拟机下载工具

yum groupinstall -y Development\ Tools
yum install wget net-tools telnet tree nmap sysstat lrzsz dos2unix bind-utils -y

二、在hdss7-11搭建DNS域名解析

1. 之前先修改各主机的主机名hostnamectl set-hostname 主机名
2. yum install bind
3. 修改配置文件/etc/named.conf,如下修改
   检查配置是否合格named-checkconf
4. 编辑vim /etc/named.rfc1912.zones在文件最后添加

zone "host.com" IN {
        type master;
        file "host.com.zone";
        allow-update { 10.4.7.11; };
};

zone "od.com" IN {
         type master;
         file "od.com.zone";
         allow-update { 10.4.7.11; };
};

5. 创建两个域名文件
   主域名文件：vim /etc/named/

$ORIGIN host.com.
$TTL 600       ; 10 minutes
@       IN SOA  dns.host.com. dnsadmin.host.com. (
                                   0        ; serial
                                   1D       ; refresh
                                   1H       ; retry
                                   1W       ; expire
                                   3H )     ; minimum
             NS     dns.host.com.
dns          A      10.4.7.11
HDSS7-11     A      10.4.7.11
HDSS7-12     A      10.4.7.12
HDSS7-21     A      10.4.7.21
HDSS7-22     A      10.4.7.22
HDSS7-200    A      10.4.7.200

从域名解析：

$ORIGIN od.com.
$TTL 600       ; 10 minutes
@              IN SOA  dns.od.com. dnsadmin.od.com. (
                                   0        ; serial
                                   1D       ; refresh
                                   1H       ; retry
                                   1W       ; expire
                                   3H )     ; minimum
             NS     dns.od.com.
dns          A      10.4.7.11
harbor       A      10.4.7.200

启动named发现ping不通。。。
修改网卡配置文件，因为以10.4.7.11主机去解析域名的所以，DNS要换成该IP

systemctl restart network

Ping通其他主机即可

三、在hdss7-200上签发证书

1. 创建目录，解压cfssl压缩包
   在src目录下载并关联目录

wget http://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/bin/cfssl
wget http://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/bin/cfssl-json
wget http://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/bin/cfssl-certinfo
chmod +x /usr/bin/cfssl*

2. 创建目录并进入目录mkdir -p /opt/cert
   创建根证书文件vim ca-csr.json

{
    "CN": "OldboyEdu",
    "hosts": [
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
       {
         "C": "CN",
         "ST": "beijing",
         "L": "beijing",
         "O": "od",
         "OU": "ops"
       }
    ],
    "ca": {
       "expiry": "175200h"
    }
}

建立证书cfssl gencert -initca ca-csr.json | cfssl-json -bare ca

表示成功！

四、部署Docker环境

1. 在hdss7-21、hdss7-22、hdss7-200上
2. 用到的是阿里云镜像https://developer.aliyun.com/mirror/docker-ce
3. 
4. 各主机执行以下操作

mkdir -p /etc/docker /data/docker
vim /etc/docker/daemon.json

{
  "graph": "data/docker",
  "storage-driver": "overlay2",
  "insecure-registries": ["registry.access.redhat.com","quay.io","harbor.od.com"],
  "registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com"],
  "bip": "172.7.22.1/24",
  "exec-opts": ["native.cgroupdriver=systemd"],
  "live-restore": true
}

注：bip是不同的

五、部署Docker镜像私有仓库harbor

1. 下载harbor的官方地址https://github.com/goharbor/harbor下载的1.8.5版本到hdss7-200主机的src目录下
2. 解压并建立软连接
3. cd /opt/harbor 进入到harbor目录
   编辑harbor.yml
   修改四处：

mkdir -p /data/harbor/logs

4. 下载harbor依赖docker-compose

 yum install -y docker-compose

5. 执行
   
   结束之后会看到后台会启动很多容器
6. 下载nginx去反代之前harbor的端口180

yum install -y nginx

7. 编辑文件vim /etc/nginx/conf.d/harbor.od.com.conf

server {
    listen   80;
    server_name   harbor.od.com;

    client_max_body_size  1000m;

    location / {
         proxy_pass  http://127.0.0.1:180;
    }
}

保存退出；检查语法成功
启动并设置开机自启

8. 能curl通是因为之前DNS的服务域有添加

9. 在浏览器登录harbor.od.com新建项目

10. 测试docker pull nginx:1.7.9
    docker images 查看下载的镜像

11. 打标签docker tag nginx:1.7.9 harbor.od.com/public/nginx:v1.7.9
    然后登录harbor网站：
    

12. 上传并检查docker push harbor.od.com/public/nginx:v1.7.9 表示成功！

六、安装主控节点服务-etcd

1. 集群规划
2. 在hdss7-200签发证书
   创建基于根证书的config文件,vim /opt/cert/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"
                ]
            }
         }
      }
}

3. 创建etcd证书请求文件
   vim /opt/cert/etcd-peer-csr.json

{
     "CN": "k8s-etcd",
     "hosts": [
          "10.4.7.11",
          "10.4.7.12",
          "10.4.7.21",
          "10.4.7.22"
      ],
      "key": {
         "algo": "rsa",
         "size": 2048
      },
      "names": [
           {
               "C": "CN",
               "ST": "beijing",
               "L": "beijing",
               "O": "od",
               "OU": "ops"
           }
      ]
}

然后创建etcd-peer请求文件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

4. 分别在hdss7-12、hdss7-21、hdss7-22主机上操作
   1️⃣添加etcd用户useradd -s /sbin/nologin -M etcd
   2️⃣下载地址https://github.com/etcd-io/etcd
   3️⃣将二进制包下载到/opt/src下
   4️⃣cd /opt/etcd

mkdir -p /opt/etcd/cert /data/etcd /data/logs/etcd-server

5️⃣进入/opt/etcd/cert 将hdss7-200的证书拷贝过来
6️⃣创建etcd启动证书
cd /opt/etcd
vim etcd-server-startup.sh

#!/bin/bash
./etcd --name etcd-server-7-21 \
       --data-dir /data/etcd/etcd-server \
       --listen-peer-urls http://10.4.7.21:2380 \
       --listen-client-urls https://10.4.7.21:2379,http://127.0.0.1:2379 \
       --quota-backend-bytes 8000000000 \
       --initial-advertise-peer-urls http://10.4.7.21:2380 \
       --advertise-client-urls https://10.4.7.21:2379,http://127.0.0.1:2379 \
       --initial-cluster etcd-server-7-12=http://10.4.7.12:2380,etcd-server-7-21=http://10.4.7.21:2380,etcd-server-7-22=http://10.4.7.22:2380 \
       --ca-file ./cert/ca.pem \
       --cert-file ./cert/etcd-peer.pem \
       --key-file ./cert/etcd-peer-key.pem \
       --client-cert-auth \
       --trusted-ca-file ./cert/ca.pem \
       --peer-ca-file ./cert/ca.pem \
       --peer-cert-file ./cert/etcd-peer.pem \
       --peer-key-file ./cert/etcd-peer-key.pem \
       --peer-client-cert-auth \
       --peer-trusted-ca-file ./cert/ca.pem \
       --log-output stdout

注意红框内的内容略有不同
加权chmod +x etcd-server-startup.sh
7️⃣修改etcd相关文件的属主，属组

chown -R etcd.etcd /opt/etcd-v3.1.20/ /data/etcd/ /data/logs/etcd-server/

8️⃣下载supervisor用来管理后台进程的
systemctl start supervisord.service
systemctl enable supervisord.service
vim /etc/supervisord.d/etcd-server.ini

[program:etcd-server-7-12]
command=/opt/etcd/etcd-server-startup.sh       ; the program (relative uses PATH, can take args)
numprocs=1                                     ; number of processes copies to start (def 1)
directory=/opt/etcd                            ; directory to cwd to before exec (def no cwd)
autostart=true                                 ; start at supervisord start (default: true)
autorestart=true                               ; restart 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=etcd                                      ; setuid to this UNIX account to run the program
redirect_stderr=true                           ; redirect proc stderr to stdout     (default false)
stdout_logfile=/data/logs/etcd-server/etcd.stdout.log    ; stdout 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)

注意：

9️⃣supervisorctl update
如下图表示成功

5. 如果报错可查看日志

tail -fn 200 /data/logs/etcd-server/etcd.stdout.log

查看整个集群健康状态可以操作

七、部署kube-apiserver集群

1. 集群规划
2. 下载地址https://github.com/kubernetes/kubernetes/tags
   下载的版本是1.15.6
   下载的是不用go语言编译的二进制包到hdss7-21、hdss7-22的/opt/src目录下
   两个主机操作如下

tar xf kubernetes-server-linux-amd64-2.tar -C /opt
cd /opt
mv kubernetes/ kubernetes-v1.15.6
ln -s kubernetes-v1.15.6/ kubernetes

接下来删除没用的包

3. 在hdss7-200签发证书
   1️⃣在/opt/cert下编辑服务端连接etcd的证书
   vim client-csr.json

{
    "CN": "k8s-node",
    "hosts": [
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
       {
         "C": "CN",
         "ST": "beijing",
         "L": "beijing",
         "O": "od",
         "OU": "ops"
       }
    ]
}

保存退出！

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json | cfssl-json -bare client

2️⃣再创建apiserver对外提供服务证书
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",
        "10.4.7.10",
        "10.4.7.21",
        "10.4.7.22",
        "10.4.7.23"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
       {
         "C": "CN",
         "ST": "beijing",
         "L": "beijing",
         "O": "od",
         "OU": "ops"
       }
    ]
}

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json | cfssl-json -bare apiserver

4. 进入hdss7-21、hdss7-22主机进行操作
   1️⃣

cd /opt/kubernetes/server/bin
mkdir cert
mkdir conf
cd cert 

将hdss7-200的三套证书拷贝过来

2️⃣cd /opt/kubernetes/server/bin/conf
编辑apiserver日志审计规则文件
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"

3️⃣cd /opt/kubernetes/server/bin
编辑启动文件vim 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://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379 \
  --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

4️⃣
chmod +x kube-apiserver.sh
mkdir -p /data/logs/kubernetes/kube-apiserver
5️⃣创建supervisor的后台启动文件
vim /etc/supervisord.d/kube-apiserver.ini

[program:kube-apiserver-7-21]
command=/opt/kubernetes/server/bin/kube-apiserver.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                               ; restart 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-apiserver/apiserver.stdout.log    ; stdout 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)

注：

保存并退出！
6️⃣supervisorctl update
《《《等待》》》

完美

八、在hdss7-11、hdss7-12上做负载均衡反代hdss7-21、hdss7-22

1. 在主机hdss7-11、hdss7-12上分别操作
   1️⃣yum install -y nginx
   2️⃣vim /etc/nginx/nginx.conf在最后添加

stream {
   upstream kube-apiserver {
        server 10.4.7.21:6443    max_fails=3 fail_timeout=30s;
        server 10.4.7.22:6443    max_fails=3 fail_timeout=30s;
   }
   server {
        listen 7443;   
        proxy_connect_timeout 2s;
        proxy_timeout  900s;
        proxy_pass  kube-apiserver;
   }
}

nginx -t 测试语法
3️⃣

yum -y install keepalived

vim /etc/keepalived/check_port.sh

#!/bin/bash
CHK_PORT=$1
if [ -n "$CHK_PORT" ];then
          PORT_PROCESS=`ss -lt|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

chmod +x /etc/keepalived/check_port.sh
4️⃣vim /etc/keepalived/keepalived.conf
hdss7-11主：

! Configuration File for keepalived

global_defs {
      router_id 10.4.7.11
}

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 251
    mcast_src_ip 10.4.7.11
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 11111111
    }
    track_script {
        chk_nginx
    }
    virtual_ipaddress {
        10.4.7.10
    }
}

hdss7-12从：

! Configuration File for keepalived

global_defs {
      router_id 10.4.7.12
}

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 251
    mcast_src_ip 10.4.7.12
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 11111111
    }
    track_script {
        chk_nginx
    }
    virtual_ipaddress {
        10.4.7.10
    }
}

5️⃣

systemctl start keepalived.service
systemctl enable keepalived.service

IP地址已有 证明已成功！

九、在hdss7-21、7-22上部署cotroller-manager

1. 创建启动文件
   cd /opt/kubernetes/server/bin/
   vim /opt/kubernetes/server/bin/kube-controller-manager.sh

  #!/bin/bash
./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

chmod +x kube-controller-manager.sh
mkdir -p /data/logs/kubernetes/kube-controller-manager

2. 编辑supervisor关于controller-manager的进程文件
   vim /etc/supervisord.d/kube-controller-manager.ini

[program:kube-controller-manager-7-21]
command=/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                               ; restart 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    ; stdout 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)

注意：

3. 
   

十、在hdss7-21、7-22上部署scheduler

1. 创建启动文件
   vim kube-scheduler.sh

#!/bin/bash
./kube-scheduler \
  --leader-elect \
  --log-dir /data/logs/kubernetes/kube-scheduler \
  --master http://127.0.0.1:8080 \
  --v 2

chmod +x kube-scheduler.sh
mkdir -p /data/logs/kubernetes/kube-scheduler

2. 编辑关于supervisor的scheduler进程文件
   vim /etc/supervisord.d/kube-scheduler.ini

[program:kube-scheduler-7-21]
command=/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                               ; restart 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    ; stdout 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)

注意:

3. 
4. ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl检查集群状态：kubectl get cs
   

十一、在hdss7-21、hdss7-22上部署kubelet

1. 在hdss7-200上创建kubelet请求证书
   cd /opt/cert
   vim kubelet-csr.json

{
    "CN": "k8s-kubelet",
    "hosts": [
       "127.0.0.1",
       "10.4.7.10",
       "10.4.7.21",
       "10.4.7.22",
       "10.4.7.23"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
       {
         "C": "CN",
         "ST": "beijing",
         "L": "beijing",
         "O": "od",
         "OU": "ops"
       }
    ]
}

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

2. 拷贝证书
   

3. 在/opt/kubernetes/server/bin/conf下创建配置

kubectl config set-cluster myk8s --certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem --embed-certs=true --server=https://10.4.7.10:7443 --kubeconfig=kubelet.kubeconfig

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

kubectl config set-context myk8s-context --cluster=myk8s --user=k8s-node --kubeconfig=kubelet.kubeconfig

kubectl config use-context myk8s-context --kubeconfig=kubelet.kubeconfig

将kubelet.kubeconfig 拷贝到hdss7-22的
/opt/kubernetes/server/bin/conf下

4. vim 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

5. 在hdss7-200准备pause基础镜像去支撑pod节点

docker pull kubernetes/pause
docker tag f9d5de079539 harbor.od.com/public/pause:latest

docker push harbor.od.com/public/pause:latest

6. 创建kubelet启动脚本
   vim kubelet.sh

#!/bin/bash
./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 hdss7-21.host.com \
  --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

chmod +x kubelet.sh
mkdir -p /data/logs/kubernetes/kube-kubelet /data/kubelet

7. 创建supervisor配置文件

vim /etc/supervisord.d/kube-kubelet.ini

[program:kube-kubelet-7-21]
command=/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                               ; restart 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    ; stdout 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)

8. supervisorctl update
9. 查看node集群是否真的存在
   
10. 修改集群角色

kubectl label node hdss7-21.host.com node-role.kubernetes.io/master=

kubectl label node hdss7-21.host.com node-role.kubernetes.io/node=

十二、运算节点安装kube-proxy

1. 签发证书vim /opt/cert/kube-proxy-csr.json

{
    "CN": "system:kube-proxy",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
          "C": "CN",
          "ST": "beijing",
          "L": "beijing",
          "O": "od",
          "OU": "ops"
         }
     ]
}

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

2. 分发证书到hdss7-21、hdss7-22

3. set-cluster在conf目录下

kubectl config set-cluster myk8s --certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem --embed-certs=true --server=https://10.4.7.10:7443 --kubeconfig=kube-proxy.kubeconfig

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

kubectl config set-context myk8s-context --cluster=myk8s --user=kube-proxy --kubeconfig=kube-proxy.kubeconfig

kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig

将kube-proxy.kubeconfig拷贝到hdss7-22上

4. 启动内核ipvs
   vim /root/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

chmod +x /root/ipvs.sh
sh /root/ipvs.sh

5. 创建启动脚本
   vim kube-proxy.sh

#!/bin/bash
./kube-proxy \
  --cluster-cidr 172.7.0.0/16 \
  --hostname-override hdss7-21.host.com \
  --proxy-mode=ipvs \
  --ipvs-scheduler=nq \
  --kubeconfig ./conf/kube-proxy.kubeconfig

chmod +x kube-proxy.sh
mkdir -p /data/logs/kubernetes/kube-proxy

6. vim /etc/supervisord.d/kube-proxy.ini

[program:kube-proxy-7-21]
command=/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                               ; restart 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    ; stdout 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)

supervisorctl update
supervisorctl status

7. yum install -y ipvsadm
   

至此大功告成！！！！！！