What is the method for dynamically injecting configuration in springboot and setting environment variables with docker?

1. Springboot dynamically injects configuration information.

This is a very simple question, but I am not good at remembering commands. I just know that the practical jar -jar is used to add a few parameters when starting the springboot project. I can't remember the specific parameters. I don’t know how these commands are configured, so I’ll briefly summarize them here.

Springboot configuration priority Default configuration 9834878a8a367468a35e9e34ba06f652 log.txt 2>&1 & #Background startup And enter the startup log into the log.txt file and print the process id
java -Xms256m -Xmx512m brief-plus_oa.jar #Set the virtual machine memory address

Note that the parameter name after -D is not Case sensitive

2. Docker dynamically injects env environment variables

1. Dockerfile configuration.

FROM openjdk:17
# 镜像是从 openjdk:11-jdk-alpin 继承而来的
VOLUME /root/tmp
# 表示挂载了 /root/tmp 目录到容器中
ADD build/libs/brief-plus_oa-0.0.1-SNAPSHOT.jar apprun.jar
# 将bootJar 添加到镜像中根目录下 命令为 apprun.jar
ENTRYPOINT ["java","-jar","/apprun.jar"]
# ENTRYPOINT 在容器启动后执行 java 命令来运行程序
# 设置容器时间
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
EXPOSE 8099

2. Build docker image.

sudo docker build -t brief_plus_ao:v1.0.0.1 -f ./Dockerfile .

3. Run the image and inject the env environment variable. -e

sudo docker run  -p 8090:8090 -e BRIEF.MYSQL.HOST=192.168.31.113  -e SPRING.REDIS.HOST=192.168.31.113 brief_plus_ao:v1.0.0.1

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