wait for mysql.service

[kovacs-andras]

Wait for mysql.service on Ubuntu.

Dear Team,

On Ubuntu there is no mysqld.service. Only mysql.service exists.
With a mysql backend in use but without waiting for mysql.service to start, the pdns service can fail+restart a couple of times on boot with an error like:
systemd[1]: Failed to start PowerDNS Authoritative Server. -> until mysql will start and accept the connections of pdns.
It's not a big deal, pdns.service will start anyways.
I'm getting the error twice in a Ubuntu 20.04 VM when booting up.
I also checked 16.04, 18.04, 22.04 and none of them has mysqld.service when I install mysql from repo.

Personally I also prefer the *d.service names and other services like OpenSSH can handle both on Ubuntu with a regular service unit file here: /lib/systemd/system/ssh.service
plus with a symlink which points to the same service unit file:
/etc/systemd/system/sshd.service -> /lib/systemd/system/ssh.service
But unfortunately this is not the case for mysql.

What do you think? Does it worth to extend the pdns.service unit file and wait for the mysql.service?

Regards,

[Habbie]

thanks!