K8S集羣安裝 之 安裝部署運算節點服務--kube-proxy

一、在證書服務器上籤發kube-proxy的證書

200 certs]# vi kube-proxy-csr.json
{
    "CN": "system:kube-proxy",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "od",
            "OU": "ops"
        }
    ]
}

200 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

二、分別在兩臺NODES服務器上安裝kube-proxy服務

# 分發證書，221/222機器：
cert]# scp 10.3.153.200:/opt/certs/kube-proxy-client.pem .
cert]# scp 10.3.153.200:/opt/certs/kube-proxy-client-key.pem .
# 221機器：
cd ../conf/
conf]# kubectl config set-cluster myk8s \
  --certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem \
  --embed-certs=true \
  --server=https://10.3.153.240:7443 \
  --kubeconfig=kube-proxy.kubeconfig

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

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

conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig .

# 222機器
conf]# scp hdss7-21:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig .

# 221/222機器
cd 
~]# lsmod |grep ip_vs
~]# vi 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 ipvs.sh
~]# ./ipvs.sh 
~]# lsmod |grep ip_vs
~~~

~~~
# 221/222機器，
~]#cd /opt/kubernetes/server/bin/
# 注意修改對應的機器ip，有一處修改
bin]# 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

bin]# chmod +x kube-proxy.sh
bin]# mkdir -p /data/logs/kubernetes/kube-proxy
# 注意機器IP，有一處修改
bin]# vi /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                                                     ; 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)

bin]# supervisorctl update
[root@test-nodes1 etcd]# supervisorctl status | grep kube-proxy
kube-proxy-7-21                  RUNNING   pid 22013, uptime 1 day, 0:32:58

bin]# yum install ipvsadm -y
[root@test-nodes1 etcd]# 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
  -> 10.3.153.221:6443            Masq    1      0          0         
  -> 10.3.153.222:6443            Masq    1      0          0      

[root@test-nodes1 etcd]# kubectl get svc
NAME         TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   192.168.0.1   <none>        443/TCP   26h