Galera bootstrap (/etc/init.d/mysql bootstrap) returns code 0 on failure

The /etc/init.d/mysql init script returns a 0 (indicating no error) code on failure when using the bootstrap argument, used for bootstrapping a Galera cluster.

I observed this when I was running

/etc/init.d/mysql bootstrap

and

/usr/bin/mysqld_safe --wsrep-recover

at the same time

To be clear, the bug here is not that it failed in my example, but that it failed and returned 0.

[root@db01 ~]# /etc/init.d/mysql bootstrap

Bootstrapping the clusterStarting MySQL...                 [FAILED]

[root@db01 ~]# echo $?

0

This signals to other tools such as Puppet, Pacemaker or systemd that the MariaDB daemon is running ok while it isn't.