Add environment variable as regex in docker-compose file

Question

I try to add environment variable that has regex value

version: "2.3"
services:
    ...
  php:
    ...
    environment:
      - "CORS_ALLOW_ORIGIN=^https?://localhost(:[0-9]+)?$"

when run docker-compose up

it gives me that error: ERROR: Invalid interpolation format for "environment" option in service "php": "CORS_ALLOW_ORIGIN=^https?://localhost(:[0-9]+)?$"

I have played around and removed $, it works fine but want to keep it.

Any idea?

Possible duplicate of [How can I escape a $ dollar sign in a docker compose file?](https://stackoverflow.com/questions/40619582/how-can-i-escape-a-dollar-sign-in-a-docker-compose-file) — kenorb, Feb 16 '19 at 13:47

score 0 · Answer 1 · answered Jan 15 '19 at 10:57

0

It tries to expand your dollar sign. Try using \$ instead of $ or take value in single quotes which prevent macro expansion.

answered Jan 15 '19 at 10:57

grapes

8,185
1
19
31

It gives me another error `ERROR: yaml.scanner.ScannerError: while scanning a double-quoted scalar in "/path/docker-compose.development.yml", line 55, column 9` – yakob abada Jan 15 '19 at 11:08
Tried put this value into `.env` file? – grapes Jan 15 '19 at 11:16
I gonna use this solution for now however it's not the best solution :( – yakob abada Jan 16 '19 at 08:19

score 0 · Answer 2 · answered Jul 29 '21 at 20:20

0

Use $$ to escape the dollar ($) symbols.

version: "2.3"
services:
    ...
  php:
    ...
    environment:
      - "CORS_ALLOW_ORIGIN='^https?://localhost(:[0-9]+)?$$'

See variable substitution in the docker-compose doc (v2)

answered Jul 29 '21 at 20:20

GiDo

1,280
12
23

Add environment variable as regex in docker-compose file

2 Answers2