K8S(九)——部署运算节点服务-kube-proxy

一、签发kube-proxy证书(在10.4.7.200主机）

1.创建证书请求json文件

cd /opt/certs/
vim kube-proxy-csr.json
{
    "CN": "system:kube-proxy",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "ShangHai",
            "L": "ShangHai",
            "O": "xy",
            "OU": "ops"
        }
    ]
}

2.生成证书文件

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

二、拷贝证书到各个节点（10.4.7.21和10.4.7.22）

scp sx7-200:/opt/certs/kube-proxy-client.pem /opt/kubernetes/server/bin/cert
scp sx7-200:/opt/certs/kube-proxy-client-key.pem /opt/kubernetes/server/bin/cert

创建配置文件（只在一台创建完成后拷贝至另一台）

[root@sx7-21 cert]# cd ../conf/

<1>set-cluster

[root@sx7-21 conf]# 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

<2>set-credentials

[root@sx7-21 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

<3>set-context

[root@sx7-21 conf]# kubectl config set-context myk8s-context \
 --cluster=myk8s \
 --user=kube-proxy \
 --kubeconfig=kube-proxy.kubeconfig

<4>use-context

[root@sx7-21 conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig

<5>拷贝至10.4.7.22主机的/opt/kubernetes/server/bin/conf目录下

[root@sx7-22 conf]# scp sx7-21:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig .

三、创建启动脚本（10.4.7.21和10.4.7.22），以7.21为例

1.加载ipvs模块

[root@sx7-21 ~]# 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@sx7-21 ~]# chmod +x ipvs.sh 
[root@sx7-21 ~]# ./ipvs.sh 
[root@sx7-21 ~]# lsmod | grep ip_vs

2.创建启动脚本

[root@sx7-21 ~]# vi /opt/kubernetes/server/bin/kube-proxy.sh
#!/bin/sh
./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

修改权限，创建目录
[root@sx7-21 ~]# chmod +x /opt/kubernetes/server/bin/kube-proxy.sh 
[root@sx7-21 ~]# mkdir -p /data/logs/kubernetes/kube-proxy

3.创建supervisor配置

[root@sx7-21 ~]# vi /etc/supervisord.d/kube-proxy.ini      // 另一台修改红色的字体

[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                                                     ; 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

supervisorctl update

 

 

四、安装LVS(10.4.7.21和10.4.7.22)

yum install -y ipvsadm