使用docker-compose
v2环境变量可以简单地设置:
enviroment:
- MONGO_PATH=mongodb://db-mongo:27017
完整的docker-compose.yml
文件:
version: '2'
services:
web:
build: .
environment:
- MONGO_PATH=mongodb://db-mongo:27017
ports:
- "3000:3000"
volumes:
- .:/app
- /app/node_modules
depends_on:
- db-mongo
- db-redis
db-mongo:
image: mongo
restart: unless-stopped
command: --smallfiles
ports:
- "27017:27017"
volumes:
- ./data:/data/db
[...]
但是,如何转义不是普通字符串的环境变量?
{"database": {"data": {"host": "mongo"}}}
我试过了:
NODE_CONFIG=\{"database": \{"data"\: \{"host": "mongo"\}, "session": \{"host": "redis" \}\}\}
NODE_CONFIG="\{"database": \{"data"\: \{"host": "mongo"\}, "session": \{"host": "redis" \}\}\}"
NODE_CONFIG='{"database": {"data": {"host": "mongo"}, "session": {"host": "redis" }}}'
错误:yaml.parser.ParserError:在解析块映射时 " ./ docker-compose.yml",第6行,第9列预期,但是 发现'}' in" ./ docker-compose.yml",第6行,第92栏
答案 0 :(得分:38)
环境变量(包括其名称),必须完全包含在单引号或双引号内:""
或''
environment:
- 'NODE_CONFIG={"database": {"data": {"host": "mongo"}, "session": {"host": "redis" }}}'
使用双引号:
environment:
- 'PORT=3000'
- "NODE_CONFIG={\"database\": {\"data\": {\"host\": \"mongo\"}, \"session\": {\"host\": \"redis\" }}}"
值得注意的是,使用双引号""
(如bash)将允许将变量放在环境变量中。
"MY_HOME_ENV_VARIABLE=${HOME}"