Docker configure Nginx reverse proxy

Article directory

  • 1. Deploy the microprogram into docker
    • 1.1 dockerfile
    • 1.2 Create docker image based on customized dockerfile
    • 1.3 Create container
    • 1.4 Testing
  • 2. Install Nginx in docker
    • 2.1 Install Nginx image
    • 2.2 Obtain the Nginx configuration file and synchronize it to the specified location on the host computer
      • Install nginx container
      • Delete nginx container
    • 2.3 Install Nginx container and mount data
    • 2.4 Testing
  • 3. Reverse proxy
      • 3.1 Configuration
      • 3.2 Testing
  • refer to:

1. Deploy micro-programs into docker

1.1 dockerfile

Start building from the basic image openjdk, where the openjdk image includes The most basic environment for running Java and tomcat, debian system

# Base image
FROM openjdk:11.0-jre-buster
# Set time zone to prevent time confusion when viewing database logs
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime & amp; & amp; echo $TZ > /etc/timezone
#Copy jar package
COPY helloworld-0.0.1-SNAPSHOT.war /app.jar
# Entrance When starting the container, the java -jar /app.jar command will be executed.
ENTRYPOINT ["java", "-jar", "/app.jar"]

  • helloworld-0.0.1-SNAPSHOT.war is my springboot simple microprogram package. The main functions are:

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1.2 Create a docker image based on a custom dockerfile

Enter the directory:

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Execute the instruction. . here refers to the directory where the Dockerfile file is located.

docker build -t docker-demo .

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1.3 Create container

docker run -d --name dd -p 8088:8080 docker-demo

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1.4 Test

Enter in the host browser: http://localhost:8008/hello

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2. Install Nginx in docker

2.1 Install Nginx image

docker pull nginx

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2.2 Obtain the Nginx configuration file and synchronize it to the specified location on the host computer

Install nginx container

docker run --name nginxdemo -p 8880:80 -d nginx

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Copy the container nginx configuration file to the host computer (the storage directory here is: E:\DockerContainersTest\\
ginx)

docker cp nginx:/etc/nginx/nginx.conf E:\DockerContainersTest\\
ginx #nginx default configuration folder
docker cp nginx:/etc/nginx/conf.d E:\DockerContainersTest\\
ginx #nginx configuration folder
docker cp nginx:/usr/share/nginx/html E:\DockerContainersTest\\
ginx\html #nginx’s html folder

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It is best to create the directory in advance here: E:\DockerContainersTest\\
ginx

Delete nginx container

docker stop nginxdemo
docker rm nginxdemo

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At this point, you have obtained the nginx configuration file in the container and saved it to the designated location on the host computer. The main purpose of this step is to facilitate the mounting of the data volume. Later modifications to the configuration can be done directly on the host computer without having to on the container.

2.3 Install Nginx container and mount data

docker run --name nginxproxy -d -p 8880:80 -v E:\DockerContainersTest\\
ginx\\
ginx.conf:/etc/nginx/nginx.conf -v E:\DockerContainersTest\\
ginx \conf.d:/etc/nginx/conf.d -v E:\DockerContainersTest\\
ginx\html:/usr/share/nginx/html -v E:\DockerContainersTest\\
ginx\cert: /etc/nginx/cert -v E:\DockerContainersTest\\
ginx\logs:/var/log/nginx -e LANG=C.UTF-8 -e LC_ALL=C.UTF-8 --privileged=true - -restart=always nginx

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2.4 Test

Directly modify the nginx default welcome page Nginx\html\index.html on the host machine

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After restarting the container, access it on the host machine

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3. Reverse proxy

Specific idea: Access the Nginx port through the browser on the host, and Nginx sends the request to the container equipped with the microprogram. The container then returns the return data to Nginx, and Nginx returns the data to the host.

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The routing address of the container with the microprogram is: 172.17.0.1, and the direct IP address is: 172.17.0.3

I have run into a trap here. When setting the address to a direct IP address, a 502 routing error occurs

3.1 Configuration

Modify Nginx proxy configuration: Nginx\conf.d\default.conf

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New configuration:

 location /hello {
        proxy_pass http://172.17.0.1:8008;#Reverse proxy configuration, forward the request to the specified service
    }

Here 172.17.0.1 and 8008 are the routing address and externally exposed port number of the dd container respectively.

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Restart the Nginx container to make the configuration take effect

3.2 Test

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Reference:

https://blog.csdn.net/lly576403061/article/details/129452986

https://www.bilibili.com/video/BV13a411q753/?p=182

https://www.bilibili.com/video/BV1HP4118797/?p=12