關於您Dockerfile
做這樣的事情是什麼?
ARG DB_NAME
ENV DB_NAME=${DB_NAME} PGDATABASE=${DB_NAME} ...
測試
$ cat Dockerfile
FROM alpine:3.4
ARG DB_NAME
ENV DB_NAME=${DB_NAME} PGDATABASE=${DB_NAME}
RUN env
撰寫文件版本2或更高!
$ cat docker-compose.yml
version: '3' #'2' should work as well
services:
docker-arg-env:
build:
context: .
args:
- DB_NAME
command: env
$ cat .env
DB_NAME=world
$ docker-compose build
Building docker-arg-env
Step 1/4 : FROM alpine:3.4
---> 0766572b4bac
Step 2/4 : ARG DB_NAME
---> Running in a56be8426dd5
---> 4b1009ba9fad
Removing intermediate container a56be8426dd5
Step 3/4 : ENV DB_NAME ${DB_NAME} PGDATABASE ${DB_NAME}
---> Running in 5bbdd40e640e
---> 593105981a2a
Removing intermediate container 5bbdd40e640e
Step 4/4 : RUN env
---> Running in dadf204c7497
HOSTNAME=26ba10d264c2
SHLVL=1
HOME=/root
PGDATABASE=world
DB_NAME=world
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PWD=/
---> 9632ee1e0e37
Removing intermediate container dadf204c7497
Successfully built 9632ee1e0e37
$ docker-compose up
Creating network "dockerargenv_default" with the default driver
Creating dockerargenv_docker-arg-env_1
Attaching to dockerargenv_docker-arg-env_1
docker-arg-env_1 | PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
docker-arg-env_1 | HOSTNAME=5a6b51f4ecc7
docker-arg-env_1 | DB_NAME=world
docker-arg-env_1 | PGDATABASE=world
docker-arg-env_1 | HOME=/root
正如你所看到的,PG_NAME和PGDATABASE期間構建時設置和運行時間。
沒有撰寫:
docker build --build-arg DB_NAME=world .
和docker run docker-arg-env:latest env
產生相同的結果。
更新
如果你不能(或不願)修改Dockerfile嘗試是這樣的:
$ cat .env
hello=world
$ cat docker-compose.yml
version: '2'
services:
app:
environment:
- bar=${hello}
- foo=${hello}
image: someimage
$ docker-compose config
version: '2'
services:
app:
environment:
- bar=world
- foo=world
image: someimage
見:https://docs.docker.com/compose/environment-variables/#the-env-file
你試過了嗎?不幸的是,它不適用於我 –
我現在;-)答案中包含示例。 – Martin
噢,我完全忘了你正在使用'docker-compose build'。應該再讀一遍問題。 – Martin