8 部署kube-proxy

7 部署kube-proxy

部署kube-proxy

集群规划
主机名						角色			ip
rstx-203.rongbiz.cn			kube-proxy		192.168.1.121	
rstx-204.rongbiz.cn			kube-proxy		192.168.1.122

注意：这里部署文档以rstx-203.rongbiz.cn主机为例。另外一台运算节点安装部署方法类似

----------
第一台node节点部署完成后，将生成的配置文件拷贝至各个Node节点
[root@rstx-204 cert]# cd /opt/kubernetes/server/bin/conf

[root@rstx-204 conf]# scp rstx-203:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig .
----------
签发kube-proxy证书
运维主机rstx-53.rongbiz.cn上：

签发生成证书签名请求（CSR）的JSON配置文件
[root@rstx-53 certs]# vi /opt/certs/kube-proxy-csr.json
{
    "CN": "system:kube-proxy",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "od",
            "OU": "ops"
        }
    ]
}

生成证书
[root@rstx-53 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@rstx-53 certs]# ll
-rw-r--r-- 1 root root 1005 12月 12 10:23 kube-proxy-client.csr
-rw------- 1 root root 1679 12月 12 10:23 kube-proxy-client-key.pem
-rw-r--r-- 1 root root 1375 12月 12 10:23 kube-proxy-client.pem
-rw-r--r-- 1 root root  267 12月 12 10:22 kube-proxy-csr.json

----------
分发证书，将证书拷贝到node节点，注意私钥文件属性600
[root@rstx-203 ~]# cd /opt/kubernetes/server/bin/certs/

[root@rstx-203 cert]#scp rstx-53.rongbiz.cn:/opt/certs/kube-proxy-client.pem  .

[root@rstx-203 cert]# scp rstx-53.rongbiz.cn:/opt/certs/kube-proxy-client-key.pem  .
----------
在conf文件夹下创建配置 -- 只做一次，然后将kube-proxy.kubeconfig拷贝至各个node节点
[root@rstx-203 cert]# cd /opt/kubernetes/server/bin/conf

# --server=https://192.168.1.200:7443 此IP地址是keeplive的VIP地址，注意修改
[root@rstx-203 conf]# kubectl config set-cluster myk8s 
  --certificate-authority=/opt/kubernetes/server/bin/certs/ca.pem 
  --embed-certs=true 
  --server=https://192.168.1.200:7443 
  --kubeconfig=kube-proxy.kubeconfig

[root@rstx-203 conf]# ls
audit.yaml  k8s-node.yaml  kubelet.kubeconfig  kube-proxy.kubeconfig

[root@rstx-203 conf]# 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

[root@rstx-203 conf]# kubectl config set-context myk8s-context 
  --cluster=myk8s 
  --user=kube-proxy 
  --kubeconfig=kube-proxy.kubeconfig

[root@rstx-203 conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig

第一台node节点部署完成后，将生成的配置文件拷贝至各个Node节点
[root@rstx-204 cert]# cd /opt/kubernetes/server/bin/conf

[root@rstx-204conf]# scp rstx-203.rongbiz.cn:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig .

----------

* 加载ipvs模块	-- 脚本需要设置成开启自动运行
[root@rstx-203 conf]# vi /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

[root@rstx-203 conf]# chmod +x /root/ipvs.sh 

执行脚本
[root@rstx-203 conf]# /root/ipvs.sh 

查看内核是否加载ipvs模块
[root@rstx-203 conf]# 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 
ip_vs_lblc             12819  0 
ip_vs_ftp              13079  0 
ip_vs_dh               12688  0 
ip_vs                 145497  24 ip_vs_dh,ip_vs_lc,ip_vs_nq,ip_vs_rr,ip_vs_sh,ip_vs_ftp,ip_vs_sed,ip_vs_wlc,ip_vs_wrr,ip_vs_pe_sip,ip_vs_lblcr,ip_vs_lblc
nf_nat                 26787  3 ip_vs_ftp,nf_nat_ipv4,nf_nat_masquerade_ipv4
nf_conntrack          133095  8 ip_vs,nf_nat,nf_nat_ipv4,xt_conntrack,nf_nat_masquerade_ipv4,nf_conntrack_netlink,nf_conntrack_sip,nf_conntrack_ipv4
libcrc32c              12644  4 xfs,ip_vs,nf_nat,nf_conntrack

设置开机自动启动	
[root@rstx-203 ~]# vi /etc/rc.d/rc.local
/root/ipvs.sh


开启开机自启动脚本功能  -- 详见本文件夹内 开启开机自启动脚本文件
[root@rstx-203 ~]# chmod +x /etc/rc.d/rc.local

[root@rstx-203 ~]# mkdir -p /usr/lib/system/system/

[root@rstx-203 ~]# vim /usr/lib/systemd/system/rc-local.service
[Unit]
Description=/etc/rc.d/rc.local Compatibility
ConditionFileIsExecutable=/etc/rc.d/rc.local
After=network.target

[Service]
Type=forking
ExecStart=/etc/rc.d/rc.local start
TimeoutSec=0
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target


[root@rstx-203 ~]# ln -s '/lib/systemd/system/rc-local.service' '/etc/systemd/system/multi-user.target.wants/rc-local.service'

开启 rc-local.service 服务：
[root@rstx-203 ~]# systemctl --system daemon-reload && systemctl start rc-local.service
[root@rstx-203 ~]# systemctl enable rc-local.service

----------
创建kube-proxy启动脚本
rstx-203.rongbiz.cn：
[root@rstx-204 ~]# vi /opt/kubernetes/server/bin/kube-proxy.sh
#!/bin/sh
./kube-proxy 
  --cluster-cidr 172.7.0.0/16 
  --hostname-override rstx-203.rongbiz.cn 
  --proxy-mode=ipvs 
  --ipvs-scheduler=nq 
  --kubeconfig ./conf/kube-proxy.kubeconfig
  

[root@rstx-204 ~]# chmod +x /opt/kubernetes/server/bin/kube-proxy.sh

[root@rstx-204 ~]# mkdir -p /data/logs/kubernetes/kube-proxy

[root@rstx-204 ~]# vi /etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-203]
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)
killasgroup=true
stopasgroup=true

[root@rstx-204 ~]# supervisorctl update

[root@rstx-204 ~]# supervisorctl status
kube-proxy-22                  RUNNING   pid 6873, uptime 0:28:15

[root@rstx-204 ~]# netstat -luntp |grep kube-proxy
tcp        0      0 127.0.0.1:10249         0.0.0.0:*               LISTEN      7310/./kube-proxy   
tcp6       0      0 :::10256                :::*                    LISTEN      7310/./kube-proxy  


----------
查看ipvs是否生效
[root@rstx-203 ~]# yum install -y ipvsadm	# 只安装，不启动
[root@rstx-203 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.254.0.1:443 nq
  -> 192.168.153.21:6443          Masq    1      0          0         
  -> 192.168.153.22:6443          Masq    1      0          0  

# 注意：kube-proxy集群各主机启动脚本略有不同，部署其他节点注意修改

[root@rstx-203 ~]# cat /data/logs/kubernetes/kube-proxy/proxy.stdout.log 

验证kuberneters集群

在任意一个运算节点，创建一个资源配置清单
这里我们选择rstx-203.rongbiz.cn主机
[root@rstx-204 ~]# vi /root/nginx-ds.yaml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: nginx-ds
spec:
  template:
    metadata:
      labels:
        app: nginx-ds
    spec:
      containers:
      - name: my-nginx
        image: harbor.rongbiz.cn/public/nginx:v1.7.9
        ports:
        - containerPort: 80


测试完删除
[root@rstx-204 ~]# kubectl create -f nginx-ds.yaml 
daemonset.extensions/nginx-ds created
[root@rstx-203 ~]# kubectl get cs
NAME                 STATUS    MESSAGE              ERROR
scheduler            Healthy   ok                   
controller-manager   Healthy   ok                   
etcd-2               Healthy   {"health": "true"}   
etcd-0               Healthy   {"health": "true"}   
etcd-1               Healthy   {"health": "true"}   
[root@rstx-203 ~]# kubectl get node
NAME                 STATUS   ROLES         AGE   VERSION
rstx-203.rongbiz.cn   Ready    master,node   94m   v1.15.4
rstx-204.rongbiz.cn   Ready    master,node   86m   v1.15.4
[root@rstx-203 ~]# kubectl get pod
NAME             READY   STATUS    RESTARTS   AGE
nginx-ds-64pxp   1/1     Running   0          4m49s
nginx-ds-q4wd9   1/1     Running   0          4m50s