我想要在docker-compose
个配置和Dockerfile
中使用一些环境变量。我有一个名为.env
的环境文件,以便在docker-compose
文件中使用它们(我用于this issue的解决方案);但是节点的Dockerfile
中无法访问这些环境变量。将JMX_PORT
,WS_PORT
和IP
视为我.env
文件中定义的变量;我在echo
中为每个Dockerfile
添加了.env
,以检查它们是否传递给它。
我尝试将env_file
放入节点的version: "2"
services:
mynode:
build:
context: .
dockerfile: Dockerfile-mynode
env_file:
- .env
ports:
- "${JMX_PORT}:${JMX_PORT}"
- "${WS_PORT}:${WS_PORT}"
部分:
version: "2"
services:
mynode:
build:
context: .
dockerfile: Dockerfile-mynode
environment:
- IP=${IP}
- JMX_PORT=${JMX_PORT}
- WS_PORT=${WS_PORT}
ports:
- "${JMX_PORT}:${JMX_PORT}"
- "${WS_PORT}:${WS_PORT}"
我也尝试过:
version: "2"
services:
mynode:
build:
context: .
dockerfile: Dockerfile-mynode
environment:
- IP
- JMX_PORT
- WS_PORT
ports:
- "${JMX_PORT}:${JMX_PORT}"
- "${WS_PORT}:${WS_PORT}"
稍作修改:
Dockerfile
上述方法均无效。
我不想在另一个文件中重新定义它们。对此有什么解决方案吗?
编辑1:
这是我的FROM mybaseimage
MAINTAINER Zeinab Abbasimazar
RUN echo ${IP}
RUN echo ${JMX_PORT}
RUN echo ${WS_PORT}
:
docker-compose config
编辑2:
这是docker-compose
命令的输出,暗示services:
mynode:
build:
context: /home/zeinab/Workspace/ZiZi-Docker/Test/test-1
dockerfile: Dockerfile-WRCore
environment:
IP: 171.80.80.80
JMX_PORT: '1998'
WS_PORT: '9000'
ports:
- 1998:1998
- 9000:9000
version: '2.0'
volumes: {}
可以按预期访问环境变量:
docker-compose build --no-cache
这是Dockerfile
命令的输出,暗示docker-compose build --no-cache
Building mynode
Step 1 : FROM mybaseimage
---> 875978d91e2e
Step 2 : MAINTAINER Zeinab Abbasimazar
---> Running in 250eac87d078
---> 0e7bd6a18c80
Removing intermediate container 250eac87d078
Step 3 : RUN echo ${IP}
---> Running in 4ee6dbf74b2a
---> fd2bff1de6b6
Removing intermediate container 4ee6dbf74b2a
Step 4 : RUN echo ${JMX_PORT}
---> Running in 01245df43926
---> 68b7e90b1c01
Removing intermediate container 01245df43926
Step 5 : RUN echo ${WS_PORT}
---> Running in d27db926ecac
---> a8c3d0cbade8
Removing intermediate container d27db926ecac
Successfully built a8c3d0cbade8
无法按预期访问环境变量:
{
"name": "Reviews Hotel",
"version": "1.0.0",
"description": "This repo contains the Reviews Hotel application that is built through Full Stack Web Developer course.",
"main": "app.js",
"scripts": {
"start": "node app.js"
},
"engines": {
"node": "8.2.1",
"npm": "5.3.0"
},
"dependencies": {
"angular": "^1.5.6",
"angular-route": "^1.5.6",
"angular-jwt": "^0.0.9",
"bcrypt-nodejs": "^0.0.3",
"jsonwebtoken": "^7.1.3",
"body-parser": "^1.14.2",
"express": "^4.13.3",
"mongodb": "^2.1.7",
"mongoose": "^4.4.8"
},
"devDependencies": {
"mocha": "^2.3.3"
},
"scripts": {
"test": "mocha"
},
"author": "Aurora Ruggieri",
"keywords": [
"FullStack"
],
"license": "ISC"
}
答案 0 :(得分:1)
所以你所做的是错的。原因在于构建时要将环境变量传递给Dockerfile。所以有两种可能的解决方案
使用构建器参数
FROM mybaseimage
MAINTAINER Zeinab Abbasimazar
ARG IP
ARG JMX_PORT
ARG WS_PORT
RUN echo ${IP}
RUN echo ${JMX_PORT}
RUN echo ${WS_PORT}
然后使用compose
传递这些构建参数version: "2"
services:
mynode:
build:
context: .
dockerfile: Dockerfile-mynode
args:
- IP=${IP}
- JMX_PORT=${JMX_PORT}
- WS_PORT=${WS_PORT}
environment_file:
- .env
ports:
- "${JMX_PORT}:${JMX_PORT}"
- "${WS_PORT}:${WS_PORT}"
您也可以使用environment_file
加载环境变量。现在,这仅在容器启动时可用,并且它们不适用于您的撰写文件或构建文件。
另外,添加构建参数只会使它们在构建期间可用,而不是在容器启动期间。如果您需要这样做,您需要定义变量两次
FROM mybaseimage
MAINTAINER Zeinab Abbasimazar
ARG IP
ARG JMX_PORT
ARG WS_PORT
ENV IP=${IP} JMX_PORT=${JMX_PORT} WS_PORT=${WS_PORT}
RUN env
复制环境文件
<强> .ENV 强>
export NAME=TARUN
<强> Dockerfile 强>
FROM alpine
COPY .env /tmp/.env
RUN cat /tmp/.env > /etc/profile.d/tarun.sh && chmod +x /etc/profile.d/tarun.sh
SHELL ["sh","-lc"]
RUN env
在RUN cat /tmp/.env > /etc/profile.d/tarun.sh && chmod +x /etc/profile.d/tarun.sh
我们创建配置文件时,应该在使用配置文件执行shell时加载该文件。
在SHELL ["sh","-lc"]
我们将默认shell从sh -c
更改为sh -l
,以便它也可以加载我们的个人资料。
最后一步的输出是
Step 5/5 : RUN env
---> Running in 329ec287a5a6
HOSTNAME=e1ede117fb1e
SHLVL=1
HOME=/root
PAGER=less
PS1=\h:\w\$
NAME=TARUN
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PWD=/
CHARSET=UTF-8
---> 6ab95f46e940
正如您所见,环境变量就在那里。
注意:由于我们有一个bash命令的导出语句,因此无法在
.env
中加载此docker-compose
格式