CentOS輕鬆上手，Kubernetes容器編排實戰指南，開啟雲原生時代高效運維之旅

引言

跟著雲打算跟容器技巧的疾速開展，Kubernetes（K8s）已成為雲原生時代的核心引擎。本文將為妳具體介紹如何在CentOS上輕鬆上手Kubernetes，並實戰容器編排，開啟高效運維之旅。

情況籌備

1. 體系請求

• 操縱體系：CentOS 7
• 硬體請求：2核CPU，4GB內存
• 網路請求：公網IP或許內網拜訪

2. 體系設置

• 更新體系：sudo yum update -y
• 安裝Docker：sudo yum install -y docker
• 啟動Docker效勞：sudo systemctl start docker
• 設置Docker開機自啟：sudo systemctl enable docker

Kubernetes集群搭建

1. 安裝kubeadm、kubelet跟kubectl

• 安裝kubeadm：sudo yum install -y kubeadm
• 安裝kubelet：sudo yum install -y kubelet
• 安裝kubectl：sudo yum install -y kubectl

2. 初始化集群

• 設置集群稱號：export CLUSTER_NAME=myk8s
• 初始化集群：sudo kubeadm init --pod-network-cidr=10.244.0.0/16
• 將kubeconfig文件增加到以後用戶：sudo cp /etc/kubernetes/admin.conf ~/$USER/.kube/config

3. 安裝網路插件

• 安裝Flannel網路插件：kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

容器編排實戰

1. 安排Nginx效勞

• 創建Nginx安排文件：`cat < nginx-deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: nginx-deployment spec: replicas: 2 selector: matchLabels: app: nginx template: metadata: labels:

  app: nginx
  

  spec: containers:

   - name: nginx
  image: nginx:1.17.1
  ports:
  - containerPort: 80
  

  EOF`

• 安排Nginx效勞：kubectl apply -f nginx-deployment.yaml

2. 安排MySQL效勞

• 創建MySQL安排文件：`cat < mysql-deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: mysql-deployment spec: replicas: 1 selector: matchLabels: app: mysql template: metadata: labels:

  app: mysql
  

  spec: containers:

   - name: mysql
  image: mysql:5.7
  ports:
  - containerPort: 3306
  

  EOF`

• 安排MySQL效勞：kubectl apply -f mysql-deployment.yaml

3. 安排Ingress把持器

• 創建Ingress把持器安排文件：`cat < ingress-nginx-deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: ingress-nginx spec: replicas: 2 selector: matchLabels: app: ingress-nginx template: metadata: labels:

  app: ingress-nginx
  

  spec: containers:

   - name: nginx
  image: nginx-ingress-controller:0.27.0
  ports:
  - containerPort: 80
  

  EOF`

• 安排Ingress把持器：kubectl apply -f ingress-nginx-deployment.yaml

4. 設置Ingress規矩

• 創建Ingress規矩文件：`cat < ingress.yaml apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: nginx-ingress spec: rules:

  • host: nginx.example.com http: paths:
    • path: / pathType: Prefix backend: service: name: nginx-deployment port: number: 80 EOF`

• 利用Ingress規矩：kubectl apply -f ingress.yaml

總結

本文具體介紹了在CentOS上輕鬆上手Kubernetes，並實戰容器編排的過程。經由過程本文的進修，妳可能開啟雲原生時代高效運維之旅，為妳的企業構建牢固、堅固的容器化利用。