Detailed explanation of the latest IDEA process of quickly deploying and running Docker images

background

Use idea with docker to realize the whole process from javaweb development, deployment, and operation.
Environment: configured docker, installed mysql8 container, a springBoot framework web project (with swagger for easy testing)

Open Docker remote connection

The online method cannot find the corresponding docker.service file, maybe the version or installation method is different.
Find the location of the docker.service file through systemctl status docker:

Modify the /etc/systemd/system/docker.service file:

#ExecStart=/usr/bin/dockerd
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock

Restart the Docker service:

systemctl daemon-reload 
systemctl restart docker.service

Port 2375 is open:

firewall-cmd --zone=public --add-port=2375/tcp --permanent
firewall-cmd --reload

After restarting, verify whether port 2375 is accessible:
http://192.168.137.188:2375/info

Note: This indicates success.

idea docker plugin configuration

idea 2019 version 3 has integrated docker. If it is not integrated, please install it yourself.

Note: docker - After clicking "+", fill in the connection name and Linux host IP: docker external port

Connect idea to docker and familiarize yourself with the available operations on the relevant interface:

Note: It integrates common commands including containers and basic images. You can study their specific usage by yourself, which is not difficult.

Add Dockerfile to SpringBoot Application

Note: The same directory as the pom file, the file contents are as follows:

FROM openjdk:8u212-jre
MAINTAINER aliyu<[email protected]>

COPY target/myframe-0.0.1-SNAPSHOT.jar /myframe-0.0.1-SNAPSHOT.jar
ENTRYPOINT ["java", "-jar", "/myframe-0.0.1-SNAPSHOT.jar"]

Add docker run configuration

Note: 1. Right click "edit configuration"
2. Click "+" and select docker
3. Select the docker connection defined earlier
4. Name of Dockerfile
5. Directory location of dockerfile
6. Project image and version definition
7. Check run build image and name the container so that you can create and run the container after creating the image.
8. Configure port mapping between host and container
9. Configure a fixed IP for the container to avoid the problem of similar projects not being able to find services due to random IP. For fixed IP configuration, please refer to: http://blog.java1234.com/blog/articles/628.html
ps: The default IP address of the mysql8 container has been configured to be in the same network segment as the IP address here.
10. You can preview the command here to check for errors.
11. Before configuring and running docker run, you need to recompile the packaged project:

clean package -U -DskipTest -P test

Note: During development, the host accesses the MySQL container in Linux, and when the application is generated as a container runtime, the application container accesses the MySQL container. The mysql configuration in yml is inconsistent, so the test yml configuration file is used specifically for docker deployment. ps: For containers to access each other, please check the "Others - Communication between containers" title. After it is created, you can see:

Note: There is one more dockerFile to start

Run docker startup configuration

Click:

Note: You can see the complete process of Maven clean packaging, as well as the process of Docker building images, creating and starting containers. You can even see the logs of the container startup project

Test access to the swagger homepage:

other

Communication between containers

Background: Because I don’t understand how containers communicate with each other, when configuring MySQL connection, the URL is always wrong and database connection problems are always reported.

The host IP plus the mapped port can access the mysql8 container:
url: jdbc:mysql://192.168.137.188:3307/db_myframe?serverTimezone=GMT

However, accessing the myframe container through the host IP plus the mapped port fails because the communication between containers is different

It cannot be accessed through localhost:3306. The localhost in the docker container does not refer to the localhost of the host machine.

Docker creates a virtual network card at runtime and names it docker0
Use docker inspect mysql8 to find the IP address 172.17.0.2. However, note that when accessing containers, the port must be the port in the container, not the port mapped to 3307 on the host.

This is the end of this article about the latest IDEA to quickly implement Docker image deployment and operation. For more related IDEA Docker image deployment and operation content, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope everyone will support 123WORDPRESS.COM in the future!