Centos7 k8s v1.5.2二进制部署安装-kube-proxy
一、安装kube-proxy 1、概述 运行在每个节点上,监听 API Server 中服务对象的变化,再通过管理 IPtables 来实现网络的转发 Kube-Proxy 目前支持三种模式: UserSpace:k8s v1.2 后就已经淘汰 IPtables:目前默认方式 IPVS--推荐,支持7层:需要安装ipvsadm、ipset 工具包和加载 ip_vs 内核模块
一、安装kube-proxy
1、概述
运行在每个节点上,监听 API Server 中服务对象的变化,再通过管理 IPtables 来实现网络的转发
Kube-Proxy 目前支持三种模式:
UserSpace:k8s v1.2 后就已经淘汰
IPtables:目前默认方式
IPVS--推荐,支持7层:需要安装ipvsadm、ipset 工具包和加载 ip_vs 内核模块
2、首先安装ipset,ipvsadm
yum install ipset -y
yum -y install ipvsadm
3、签发证书
vim /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"
}
]
}
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
cd /opt/kubernetes/server/bin/cert/
scp operations:/opt/certs/kube-proxy-client.pem ./
scp operations:/opt/certs/kube-proxy-client-key.pem ./
4、分发证书
cd /opt/kubernetes/server/bin/conf
# 设置集群参数
kubectl config set-cluster myk8s \
--certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem \
--embed-certs=true \
--server=https://192.168.112.10:7443 \
--kubeconfig=kube-proxy.kubeconfig
# 设置客户端认证参数
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
# 设置上下文参数
kubectl config set-context myk8s-context \
--cluster=myk8s \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig
# 设置当前使用的上下文
kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig
5、加载ipvs
vim /root/ipvs.sh 编辑开启ipvs内核的脚本:
#!/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 /root/ipvs.sh
sh /root/ipvs.sh
6、编辑kube-proxy启动脚本
vi /opt/kubernetes/server/bin/kube-proxy.sh
#!/bin/sh
./kube-proxy \
--cluster-cidr 172.7.0.0/16 \
--hostname-override kubectl1.host.com \
--proxy-mode=ipvs \
--ipvs-scheduler=nq \
--kubeconfig ./conf/kube-proxy.kubeconfig
chmod +x /opt/kubernetes/server/bin/kube-proxy.sh
mkdir -p /data/logs/kubernetes/kube-proxy
7、编辑supervisord启动文件
vi /etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-112-22]
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)
更新supervisord:
supervisorctl update
supervisorctl status
二、创建pod
1、创建nginx-ds pod
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.od.com/public/nginx:v1.7.9
ports:
- containerPort: 80
kubectl create -f nginx-ds.yaml
查看:
kubectl get pods
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