二進制部署K8s集羣第12節Node節點之kube-proxy部署

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架構：

一、本機架構
二、建立生成證書csr的json配置文件
三、生成Kube-proxy的client證書
四、拷貝證書
五、建立配置
六、拷貝配置
七、加載ipvs模塊
八、建立啓動腳本
九、建立supervisor配置
十、啓動服務並檢查

一、本機架構

二、建立生成證書csr的json配置文件
在hdss7-200的主機上操做

cd /opt/certs
cat > kube-proxy-csr.json <<eof
{
    "CN": "system:kube-proxy",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "GuangZhou",
            "L": "GuangZhou",
            "O": "k8s",
            "OU": "yw"
        }
    ]
}
eof

三、生成Kube-proxy的client證書

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@hdss7-200 certs]# ll kube-proxy-c*
-rw-r--r--. 1 root root 1009 9月  20 22:37 kube-proxy-client.csr
-rw-------. 1 root root 1675 9月  20 22:37 kube-proxy-client-key.pem
-rw-r--r--. 1 root root 1387 9月  20 22:37 kube-proxy-client.pem
-rw-r--r--. 1 root root  271 9月  20 22:37 kube-proxy-csr.json

四、拷貝證書

scp /opt/certs/kube-proxy-client.pem hdss7-21:/opt/kubernetes/server/bin/certs
scp /opt/certs/kube-proxy-client-key.pem hdss7-21:/opt/kubernetes/server/bin/certs
scp /opt/certs/kube-proxy-client.pem hdss7-22:/opt/kubernetes/server/bin/certs
scp /opt/certs/kube-proxy-client-key.pem hdss7-22:/opt/kubernetes/server/bin/certs

五、建立配置
在hdss7-21.host.com上操做
5.1 set-cluster

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

5.2 set-credentials

kubectl config set-credentials kube-proxy \
  --client-certificate=/opt/kubernetes/server/bin/certs/kube-proxy-client.pem \
  --client-key=/opt/kubernetes/server/bin/certs/kube-proxy-client-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig

5.3 set-context

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

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

六、拷貝配置
scp kube-proxy.kubeconfig hdss7-22:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig

七、加載ipvs模塊

在hdss7-21.host.com，hdss7-22.host.com上操做，以hdss7-21操做爲例
lsmod |grep ip_vs
cat > /root/ipvs.sh <<'eof'
#!/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
eof
chmod +x /root/ipvs.sh 
sh /root/ipvs.sh 
lsmod |grep ip_vs

八、建立啓動腳本
不一樣地方：--hostname-override hdss7-21.host.com

cat > /opt/kubernetes/server/bin/kube-proxy.sh <<eof
#!/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
eof
chmod +x /opt/kubernetes/server/bin/kube-proxy.sh
mkdir -p /data/logs/kubernetes/kube-proxy

九、建立supervisor配置
不一樣地方：[program:kube-proxy-7-21]

cat > /etc/supervisord.d/kube-proxy.ini <<eof
[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)
eof

十、啓動服務並檢查
controller-manager配置service集羣IP192.168.0.0網段
kube-proxy.kubeconfig配置訪問10.4.7.10VIP，再負載均衡到10.4.7.21,
10.4.7.22，把數據上傳到apiserver，接着再保存到etcd

supervisorctl update
supervisorctl status
yum install ipvsadm -y
[root@hdss7-21 ~]# ipvsadm -Ln
kubectl get svcIP 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
  -> 10.4.7.21:6443               Masq    1      0          0         
  -> 10.4.7.22:6443               Masq    1      0          0         
[root@hdss7-21 ~]# kubectl get svc
NAME         TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   192.168.0.1   <none>        443/TCP   24h

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