In this paper, the target

Docker-compose, spring Boot application for a cluster (2 dockers, multiple similar, as long as the docker-compose. Yml plus boot application service can be published process)Copy the code

architecture

Spring Boot uses Nginx as the reverse proxy, Redis as the cache, mysql as the database, all docker-basedCopy the code

Main configuration file description

application-compose.yml


docker-compose.yml


Start the SpringBoot project to see what the interface looks like



Generate jar package


Copy the jar package


Generate a Docker image


or



1 discount ️ Enter the project directory


2 ⃣ ️ CD/Users/mengfanxiao/Documents/project/person/springboot/docker - compose/compose - demo


3 docker build. -t comement-Demo :1.0

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Start the docker compose

docker-compose up -d

D indicates that log output at runtime is not displayed


Use docker-compose logs to view

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As you can see, redis, mysql, Spring Boot, nginx containers are all startedCopy the code

Initialize the mysql database

  • Check the mysql docker ID
docker ps
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  • Copy the compose. SQL file to the docker /opt directory
docker cp compose.sql 01bd894f9ebd:/opt        
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  • Enter the mysql docker container
docker exec -it 01bd894f9ebd /bin/bash
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  • Docker /opt/compose. SQL to initialize the database

    1 ️ mysql -u root -P

    Enter the password of user root as set in docker-comemage. ymlCopy the code

    2 ⃣ ️ source/opt/compose. The SQL


Exception handling

  • Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: NOAUTH Authentication required.
Visit curl 127.0.0.1/redis for the exception reported
Solution The redis access password is not configured

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  • Failed to obtain JDBC Connection
Visit http://127.0.0.1/commands on the surface of the paper
Solution mysql Docker port mapping

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The process to comb

1. Open the JAR package
2. Generate dokcer image from jar package


Docker compose: mysql, Redis, 2 Springboot, nginx, etc


4, Access nginx interface route forward to Springboot and then access Redis and mysql

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The interface test



Analysis of test results

  • Since the nginx port is 80, no port number is used to access it
  • The IP address returned by /redis is 172.18.0.4 and 172.18.0.5, respectively.

extension

  • Restart docker-compose Down

  • Where does db_data map to in docker-comemage. yml

docker volume ls
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1 One ️ The red box in the figure is the location of actual DB_data.
2 discount ️ Here actually stores mysql data, even if the mysql container (docker-compose Down, or Docker RM XXX) is deleted,


3 discount ️ When the next container is established, the data is still in and the root password will not change.


4 discount if the password in Docker-compose changes, the volume db_data should be deleted, and docker-compose should rebuild the volume and re-initialize the database.


Docker volume rm comement-demo_db_data docker volume rm comement-demo_db_dataCopy the code


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Code resources


https://gitee.com/pingfanrenbiji/compose-demo.git
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reference


https://www.cnblogs.com/bear129/p/12523573.html
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