K8S--安装Nginx

野性酷女 2024-02-05 18:58 38阅读 0赞

原文网址：[K8S--安装Nginx-CSDN博客][K8S--_Nginx-CSDN]

## 简介 ##

本文介绍K8S安装Nginx的方法。

## 1.创建Nginx目录及配置文件 ##

mkdir -p /work/devops/k8s/app/nginx/{config,html}

在config目录下创建nginx.conf配置文件，内容如下：

# events必须要有
    events {
        worker_connections  1024;
    }
    
    http {
        include       /etc/nginx/mime.types;
        default_type  application/octet-stream;
    
        #日志格式
        log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" $http_x_forwarded_for';
        #日志的路径
        access_log  /var/log/nginx/access.log  main;
    
        sendfile  on;
    
        keepalive_timeout  65;
    
        include /etc/nginx/conf.d/*.conf;
    
        server{
            # 监听的端口
            listen 80;
            server_name _;
            root /usr/share/nginx/html/;
            index index.html;
        }
    }

在html目录下创建index.html，内容如下：

<!DOCTYPE html>
    <html>
    <head>
      <meta charset="utf-8">
      <title>K8S搭建nginx</title>
    </head>
    <body>
      <h1>Hello World！</h1>
    </body>
    </html>

## 2.编写K8S配置文件 ##

此配置文件用于创建Namespace、Deployment、Service。

*  Namespace：命名空间，用于区分应用。
 *  Deployment：用于生成pod。
 *  Service：用于将pod暴露到集群中，供其他pod或者外部访问。

到/work/devops/k8s/app/nginx/路径下，创建名为k8s.yaml的配置文件

# 创建命名空间，Deployment和Service中要引用。
    apiVersion: v1
    kind: Namespace
    metadata:
      name: middle
      labels:
        name: middle
    ---
    # 创建Deployment
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: nginx-deployment
      namespace: middle
      labels:
        app: nginx #与Deployment.spec.template.metadata的labels对应
    spec:
      # 副本的数量
      replicas: 1
      selector:
        # 选择app=nginx的Pod
        matchLabels:
          app: nginx #与Deployment.spec.template.metadata的labels对应
      # 选择或创建的Pod的模板
      template:
        metadata:
          # Pod的标签元数据。与上边Deployment.spec.selector.matchLabels对应
          labels:
            app: nginx
        spec:
          # 容器的路径
          containers:
            - image: nginx:latest
              name: nginx-latest
              ports:
                - containerPort: 80
                  name: nginx-80
              # 容器内的路径
              volumeMounts:
                - name: config
                  mountPath: /etc/nginx/nginx.conf
                - name: config-include
                  mountPath: /etc/nginx/conf.d/
                - name: log
                  mountPath: /var/log/nginx/
                - name: html
                  mountPath: /usr/share/nginx/html/
                - name: cert
                  mountPath: /etc/nginx/cert/
          # 主机的路径
          volumes:
            - name: config #和volumeMounts中的内容要对应
              hostPath:
                path: /work/devops/k8s/app/nginx/config/nginx.conf
                type: File
            - name: config-include #和volumeMounts中的内容要对应
              hostPath:
                path: /work/devops/k8s/app/nginx/config/conf.d/
                type: DirectoryOrCreate
            - name: log #和volumeMounts中的内容要对应
              hostPath:
                path: /work/devops/k8s/app/nginx/logs/
                type: DirectoryOrCreate
            - name: html #和volumeMounts中的内容要对应
              hostPath:
                path: /work/devops/k8s/app/nginx/html/
                type: DirectoryOrCreate
            - name: cert #和volumeMounts中的内容要对应
              hostPath:
                path: /work/devops/k8s/app/nginx/cert/
                type: DirectoryOrCreate
    ---
    # 创建Service
    apiVersion: v1
    kind: Service
    metadata:
      name: nginx-service
      namespace: middle
      labels:
        app: nginx
    spec:
      ports:
        - name: nginx-port
          port: 8000   # Service监听的端口
          targetPort: 80  # nginx自身暴露的端口。对应Deployment的containerPort
          # 对外的端口号
          nodePort: 30003
      # 与Deployment.spec.template.metadata.labels对应
      selector:
        app: nginx
      # NodePort类型可以对外暴露端口
      type: NodePort

## 3.启动Nginx ##

到/work/devops/k8s/app/nginx/路径下，执行此命令：

kubectl apply -f k8s.yaml

结果：

![a27ac6e07c4a44d4b4d1b0f0c250ab91.png][]

## 4.查看启动结果 ##

### **法1：通过dashboard查看** ###

![74d01546ae6d4fe78a44ef772b597186.png][]

![c4eb2d90a7114a15bbeec1572cccd69c.png][]

### **法2：通过命令查看** ###

kubectl get pods -A

结果：

![822fbfa5a6274ebca3554678a3e3f0f6.png][]

kubectl get services -A

结果

![2f4a6f62139b45c6b6c127e726aa3c53.png][]

## 4.访问Nginx ##

### **测试1：外部访问NodePort** ###

访问：ip:nodePort端口号

![e936f837463a4f678d21ac122dad7d4f.png][]

### **测试2：访问集群** ###

curl 10.100.95.158:8000

结果：

![05abd265ba0a43e8af6cb06bbac751d7.png][]

### 测试3：访问容器内部 ###

先进入容器内部，再访问容器端口。

**1.找到pod的名字**

kubectl get pods -A

结果：

![dbccffee96d346658ce24eff5da5f1d5.png][]

**2.进入容器内部**

kubectl exec nginx-deployment-557c7b98b6-8l5r5 -n middle -it -- bash

结果：

![1a3537fbc0224d81a1421823ad4152cc.png][]

**3.访问Nginx**

curl localhost:80

结果

![d116bb1e6f8c4c829321fe53061ae8f4.png][]

备注：可以通过Ctrl+D退出。

## 5.删除Nginx ##

到/work/devops/k8s/app/nginx/路径下，执行此命令：

kubectl delete -f k8s.yaml

结果：

![4b36763d88a64864af1f4c1dcad436dc.png][]

[K8S--_Nginx-CSDN]: https://knife.blog.csdn.net/article/details/135197838
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