如何在docker compose中使用环境变量 [英] How to use environment variables in docker compose

问题描述

我希望能够在 docker-compose.yml 中使用 env 变量，并在 docker-compose up 时传入值.这是例子.

我今天使用基本的 docker run 命令执行此操作，该命令包含在我自己的脚本中.有没有办法通过 compose 实现它，而无需任何此类 bash 包装器?

代理:主机名:$ 主机名卷:-/mnt/data/logs/$hostname:/logs-/mnt/data/$hostname:/data

解决方案

1. 创建一个template.yml，这是你的docker-compose.yml 和环境变量.
2. 假设您的环境变量位于文件env.sh"中
3. 将以下代码放入 sh 文件中并运行它.

<块引用>

源 env.sh;rm -rf docker-compose.yml;环境子<"template.yml" > "docker-compose.yml";

一个新文件 docker-compose.yml 将使用正确的环境变量值生成.

示例 template.yml 文件:

oracledb:图像:${ORACLE_DB_IMAGE}特权:真实cpuset:0"端口:- "${ORACLE_DB_PORT}:${ORACLE_DB_PORT}"命令:/bin/sh -c "chmod 777/tmp/start;/tmp/start"容器名称:${ORACLE_DB_CONTAINER_NAME}

示例 env.sh 文件:

#!/bin/bashexport ORACLE_DB_IMAGE=<图像名称>export ORACLE_DB_PORT=<要暴露的端口>导出 ORACLE_DB_CONTAINER_NAME=ORACLE_DB_SERVER

I would like to be able to use env variables inside docker-compose.yml, with values passed in at the time of docker-compose up. This is the example.

I am doing this today with basic docker run command, which is wrapped around my own script. Is there a way to achieve it with compose, without any such bash wrappers?

proxy:
  hostname: $hostname
  volumes:
    - /mnt/data/logs/$hostname:/logs
    - /mnt/data/$hostname:/data

解决方案

1. Create a template.yml, which is your docker-compose.yml with environment variable.
2. Suppose your environment variables are in a file 'env.sh'
3. Put the below piece of code in a sh file and run it.

source env.sh; rm -rf docker-compose.yml; envsubst < "template.yml" > "docker-compose.yml";

A new file docker-compose.yml will be generated with the correct values of environment variables.

Sample template.yml file:

oracledb:
        image: ${ORACLE_DB_IMAGE}
        privileged: true
        cpuset: "0"
        ports:
                - "${ORACLE_DB_PORT}:${ORACLE_DB_PORT}"
        command: /bin/sh -c "chmod 777 /tmp/start; /tmp/start"
        container_name: ${ORACLE_DB_CONTAINER_NAME}

Sample env.sh file:

#!/bin/bash 
export ORACLE_DB_IMAGE=<image-name> 
export ORACLE_DB_PORT=<port to be exposed> 
export ORACLE_DB_CONTAINER_NAME=ORACLE_DB_SERVER

这篇关于如何在docker compose中使用环境变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！