Real life scenario: In my automation script, there is a cli to run barman recover on a barman container. However it's possible to pass the "ssh xxx" as a whole string arg to the --remote-ssh-command, and barman reports "barman: error: unrecognized arguments: postgres@IP -p 60022"
docker-compose exec -T barman barman recover SRV1 last /var/lib/postgresql/data/pgdata/recovered.streaming --remote-ssh-command "ssh postgres@IP -p 60022"
# I tried with bach -c trick, still no luck.
docker-compose exec -T barman bash -c "barman recover SRV1 last /var/lib/postgresql/data/pgdata/recovered.streaming --remote-ssh-command 'ssh postgres@IP -p 60022'"
To simplify, imagine a minimal reproducing case:
docker-compose exec -T barman bash -c "echo hello"
# (It echos nothing. But I want it to behave like the following.)
docker-compose exec -T barman echo hello
# hello
The question is, how to pass a quoted string arg through docker-compose exec?
My solution: use docker compose instead of docker-compose.
docker compose exec -T barman bash -c "echo hello"
# hello
docker-compose exec -T barman echo hello
# hello
I believe the Python version (docker-compose) doesn't process the arguments with space well. Fortunately the Go version (docker compose) doesn't have such a problem.
I tried @Fravadona 's answer, but unluckily in Alpine Linux the printf does not have %q.