How to exit a postgres docker container from a bash script

Question

I have a docker-compose.yml configured to create and add data to a database. My compose file then loads in a bash script which will run a few short tests on the data and exit 1 upon a test failing. This is working as intended, however when I want my container to exit upon all tests passing but the docker-entrypoint.sh script seems to ignore my exit 0 command. I've attempted to write a different entrypoint script which will call on the docker-entrypoint.sh in hopes that I can then exit the container, but I'm not having any luck. Is there any easy way to implement this?

Output example:

postgres_1  | PostgreSQL init process complete; ready for start up.
postgres_1  |
postgres_1  | 2020-04-06 19:29:58.511 UTC [1] LOG:  starting PostgreSQL 12.2 (Debian 12.2-2.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
postgres_1  | 2020-04-06 19:29:58.511 UTC [1] LOG:  listening on IPv4 address "0.0.0.0", port 5432
postgres_1  | 2020-04-06 19:29:58.511 UTC [1] LOG:  listening on IPv6 address "::", port 5432
postgres_1  | 2020-04-06 19:29:58.517 UTC [1] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
postgres_1  | 2020-04-06 19:29:58.534 UTC [102] LOG:  database system was shut down at 2020-04-06 19:29:58 UTC
postgres_1  | 2020-04-06 19:29:58.540 UTC [1] LOG:  database system is ready to accept connections

Are there other things running in the container? The container won't exit until all the processes in it have died. — jordanm
– jordanm, Commented Apr 6, 2020 at 19:24
see my edit - it just says the database system is ready to accept connections. I want it to just close out upon all my tests passing. — Polyphase29
– Polyphase29, Commented Apr 6, 2020 at 19:31

Hamed Rostami · Accepted Answer · 2020-04-07 16:36:32Z

1

it's normal; entrypoint will ignore any command , to solve this you can use CDM parameter after entrypoint declaration in Dockerfile. For example, the following snippet in Dockerfile

ENTRYPOINT ["/bin/echo", "Hello"]
CMD ["world"]

when container runs as

docker run -it <image>

will produce output:

Hello world

but when container runs as

docker run -it <image> John

will result in:

Hello John

answered Apr 7, 2020 at 16:36

Hamed Rostami

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2 Comments

Polyphase29 Over a year ago

Thanks for the response. So in my instance, when would I want to exit to make sure the docker-entrypoint.sh script can exit at the right time?

Hamed Rostami Over a year ago

for manual exit can use this method , if you want to do something after somethings should write bash script for that in entrypoint. @Polyphase29

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