docker 传递容器的环境变量

本案例以springboot为例

第一种

application.properties

spring.datasource.url=jdbc:mysql://${DB_IP}:${DB_PORT}/${DB_NAME}?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&serverTimezone=${tz:GMT-6}
spring.datasource.username=${DB_USER}
spring.datasource.password=${DB_PWD}
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

Dockerfile:

FROM openjdk:8-jre-slim
MAINTAINER cdn

PARAMS=""
ENV TZ=GMT-6
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

ADD target/*.jar /app.jar

ENTRYPOINT ["sh","-c","java -jar $JAVA_OPTS /app.jar $PARAMS"]

对应的docker 启动脚本：

docker run  -e DB_IP=192.168.1.3 -e DB_PORT=2306 -e DB_NAME=aa -e DB_USER=root -e DB_PWD=123456 -p 900:4444 demo:1

第二种

Dockerfile:

FROM openjdk:8-jre-slim
MAINTAINER cdn

PARAMS=""
ENV TZ=GMT-6
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

ADD target/*.jar /app.jar

ENTRYPOINT ["sh","-c","java -jar $JAVA_OPTS /app.jar $PARAMS"]

docker run -e PARAMS="--spring.datasource.url=jdbc:mysql://127.0.0.1:2306/aa?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&serverTimezone=GMT-6 --spring.datasource.username=root --spring.datasource.password=123456" -p 9999:20600 -v /Users/caidingnu/logs/xxl_job:/data/xxl-job --name xxl-job-admin  -d xxl:33