Trouble with environment vars

[koichirose]

I'm having a weird issue, I set this in my docker-compose.yml:

...
environment:
      - TZ=${TZ}
      - BORG_PASSPHRASE=${BORG_PASSPHRASE}
      - BACKUP_CRON=${BACKUP_CRON}

and I have a .env file:

TZ=Europe/Berlin
BORG_PASSPHRASE="mypass"
VOLUME_SOURCE=/home/
BACKUP_CRON="20 */4 * * *"
...

If I run:

docker compose up -d
docker exec -it borgmatic bash

and then run env inside the container, I can see all my env vars just fine.

If I shut down the container and run:
docker compose run --rm borgmatic env
I can only see the following vars:

SHLVL=1
OLDPWD=/
PATH=/command:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PWD=/

But, if I run docker compose run --rm borgmatic borgmatic list
I can see this output:

...
Time Zone: Europe/Berlin
-----------------------------------
Applying custom cron
Cron job set as:
20 */4 * * * /usr/local/bin/borgmatic --stats -v 0 2>&1

crond: crond (busybox 1.37.0) started, log level 8
Enter passphrase for key ssh://myuser@myhost/./myrepo: 

So it's correctly getting the TZ and BACKUP_CRON vars, but not BORG_PASSPHRASE.

My end goal is to setup cron on the host and run backups with docker compose run instead of having the container always running with its own cron.

What's wrong with my setup?

[koichirose]

Nevermind, just found this and fixed with S6_KEEP_ENV=1