部署kube-proxy

集群规划

主机名						角色			ip
HDSS7-21.host.com			kube-proxy		192.168.153.21	
HDSS7-22.host.com			kube-proxy		192.168.153.22

注意：这里部署文档以HDSS7-21.host.com主机为例，另外一台运算节点安装部署方法类似

---

签发kube-proxy证书

运维主机HDSS7-200.host.com上：

# 签发生成证书签名请求（CSR）的JSON配置文件
[root@localhost harbor]# cd /opt/certs/
[root@hdss7-200 certs]# vi /opt/certs/kube-proxy-csr.json
{
    "CN": "system:kube-proxy",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "shengzheng",
            "L": "shengzheng",
            "O": "od",
            "OU": "ops"
        }
    ]
}

生成证书

[root@hdss7-200 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
[root@hdss7-200 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@hdss7-21 ~]# cd /opt/kubernetes/server/bin/cert/

[root@hdss7-21 cert]# scp 10.4.7.200:/opt/certs/kube-proxy-client-key.pem .

[root@hdss7-21 cert]# scp 10.4.7.200:/opt/certs/kube-proxy-client.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@hdss7-21 cert]# cd /opt/kubernetes/server/bin/conf

# --server=https://10.4.7.10:7443 此IP地址是keeplive的VIP地址，注意修改
[root@hdss7-21 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

[root@hdss7-21 conf]# ls
audit.yaml  k8s-node.yaml  kubelet.kubeconfig  kube-proxy.kubeconfig

[root@hdss7-21 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

[root@hdss7-21 conf]# kubectl config set-context myk8s-context \
  --cluster=myk8s \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig

[root@hdss7-21 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@hdss7-22 cert]# cd /opt/kubernetes/server/bin/conf

[root@hdss7-22 conf]# scp 10.4.7.21:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig .

---

分别在2台主机执行

加载linux内核中的ipvs模块

– 脚本需要设置成开启自动运行

[root@hdss7-21 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@hdss7-21 conf]# chmod +x /root/ipvs.sh 

执行脚本

[root@hdss7-21 conf]# /root/ipvs.sh 

查看内核是否加载ipvs模块

[root@hdss7-21 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@hdss7-21 ~]# vi /etc/rc.d/rc.local
/root/ipvs.sh

开启开机自启动脚本功能

[root@hdss7-21 ~]# chmod +x /etc/rc.d/rc.local

[root@hdss7-21 ~]# mkdir -p /usr/lib/system/system/

[root@hdss7-21 ~]# vi /usr/lib/system/system/rc-local.service
[Install]
WantedBy=multi-user.target

[root@hdss7-21 ~]# 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@hdss7-21 ~]# systemctl start rc-local.service
[root@hdss7-21 ~]# systemctl enable rc-local.service
[root@localhost conf]# systemctl status rc-local.service
● rc-local.service - /etc/rc.d/rc.local Compatibility
   Loaded: loaded (/usr/lib/systemd/system/rc-local.service; enabled; vendor preset: disabled)
   Active: active (exited) since 日 2020-06-28 21:42:04 CST; 10s ago

6月 28 21:42:04 hdss7-22.com systemd[1]: Starting /etc/rc.d/rc.local Compatibility...
6月 28 21:42:04 hdss7-22.com systemd[1]: Started /etc/rc.d/rc.local Compatibility.

创建kube-proxy启动脚本

HDSS-7-21.host.com：
[root@hdss7-22 ~]# 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
  

# 备注： --hostname-override hdss7-21.host.com  根据实际情况修改主机名
[root@hdss7-22 ~]# chmod +x /opt/kubernetes/server/bin/kube-proxy.sh
[root@hdss7-22 ~]# mkdir -p /data/logs/kubernetes/kube-proxy

创建supervisord启动脚本

# [program:kube-proxy-7-21]  根据情况修改主机名
[root@hdss7-22 ~]# 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)


[root@hdss7-22 ~]# supervisorctl update

[root@hdss7-22 ~]# supervisorctl status
kube-proxy-7-22                  RUNNING   pid 6873, uptime 0:28:15

[root@hdss7-22 ~]# 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@hdss7-21 ~]# yum install -y ipvsadm	# 只安装，不启动
[root@hdss7-21 ~]# 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 
  -> 10.4.7.21:6443               Masq    1      0          0         
  -> 10.4.7.22:6443               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@hdss7-21 ~]# cat /data/logs/kubernetes/kube-proxy/proxy.stdout.log