Run supervisord with pid 1

[ryoluo]

Problem

When we stop the containers, laravel.test is exited with code 137 (SIGKILL).
This is because supervisord is not running with pid 1.

$ docker-compose up
laravel.test_1  | 2022-05-28 19:13:18,824 INFO supervisord started with pid 9
$ docker-compose stop
$ docker-compose ps
        Name                   Command           State     Ports
----------------------------------------------------------------
sample_laravel.test_1   start-container         Exit 137        
sample_mysql_1          /entrypoint.sh mysqld   Exit 0    

Solution

At start-container script, use exec command to run supervisord. It makes it possible to replace the current process (pid 1).
Now, supervisord is started with pid 1 and we can stop the container with exit code 0.

$ docker-compose up
laravel.test_1  | 2022-05-28 19:33:08,619 INFO supervisord started with pid 1
$ docker-compose stop
$ docker-compose ps
        Name                   Command           State     Ports
----------------------------------------------------------------
sample_laravel.test_1   start-container         Exit 0        
sample_mysql_1          /entrypoint.sh mysqld   Exit 0