【云原生 · Kubernetes】apiserver高可用

个人名片：
因为云计算成为了监控工程师‍
个人博客：念舒_C.ying
CSDN主页️：念舒_C.ying

7.1 高可用选型

ipvs+keepalived
nginx+keepalived
haprxoy+keepalived
每个节点kubelet 启动静态pod nginx haprxoy

7.2 构建nginx或者haproxy镜像

#构建

docker build -t imagename .

7.3 生成kubelet 静态启动pod yaml

mkdir -p /opt/k8s/work/yaml

cd /opt//k8s/work/yaml

cat >/opt/k8s/work/yaml/kube-ha-proxy.yaml <<EOF

apiVersion: v1

kind: Pod

metadata:

creationTimestamp: null

labels:

component: kube-apiserver-ha-proxy

tier: control-plane

annotations:

prometheus.io/port: "8404"

prometheus.io/scrape: "true"

name: kube-apiserver-ha-proxy

namespace: kube-system

spec:

containers:

 - args:

 - "CP_HOSTS=192.168.2.175,192.168.2.176,192.168.2.177"

image: docker.io/juestnow/nginx-proxy:1.21.0

imagePullPolicy: IfNotPresent

name: kube-apiserver-ha-proxy

env:

 - name: CPU_NUM

value: "4"

 - name: BACKEND_PORT

value: "5443"

 - name: HOST_PORT

value: "6443"

 - name: CP_HOSTS

value: "192.168.2.175,192.168.2.176,192.168.2.177"

hostNetwork: true

priorityClassName: system-cluster-critical

status: {}

EOF

参数说明：

CPU_NUM：nginx 使用cpu 核数
BACKEND_PORT：后端kube-apiserver监听端口
HOST_PORT：负载均衡器监听端口
CP_HOSTS：kube-apiserver服务IP地址列表
metrics端口：8404 prometheus 拉取数据使用

已有镜像：

nginx 镜像：docker.io/juestnow/nginx-proxy:1.21.0
haproxy镜像：docker.io/juestnow/haproxy-proxy:2.4.0

分发kube-ha-proxy.yaml 到所有节点

cd /opt/k8s/work/yaml/

# server 节点

scp kube-ha-proxy.yaml root@192.168.2.175:/apps/work/kubernetes/manifests/

scp kube-ha-proxy.yaml root@192.168.2.176:/apps/work/kubernetes/manifests/

scp kube-ha-proxy.yaml root@192.168.2.177:/apps/work/kubernetes/manifests/

# node 节点

scp kube-ha-proxy.yaml root@192.168.2.187:/apps/work/kubernetes/manifests/

scp kube-ha-proxy.yaml root@192.168.2.185:/apps/work/kubernetes/manifests/

scp kube-ha-proxy.yaml root@192.168.3.62:/apps/work/kubernetes/manifests/

scp kube-ha-proxy.yaml root@192.168.3.70:/apps/work/kubernetes/manifests/

期待下次的分享，别忘了三连支持博主呀~
我是 念舒_C.ying ，期待你的关注~

巴特西

【云原生 · Kubernetes】apiserver高可用

7.1 高可用选型

7.2 构建nginx或者haproxy镜像

7.3 生成kubelet 静态启动pod yaml

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