Am 24.08.2011 19:36, schrieb Lennart Poettering: > On Wed, 24.08.11 10:45, Tom Lane (tgl@xxxxxxxxxx) wrote: > >> >> Reindl Harald <h.reindl@xxxxxxxxxxxxx> writes: >>> Am 23.08.2011 23:28, schrieb Tom Lane: >>>> there's no other way for "mysqladmin ping" to work, for example >> >>> and where is the problem? >> >> I'm not planning on repeating myself either, but: a database >> *monitoring* tool, as opposed to a vanilla client, needs to know whether >> the database is in fact up. Autostarting the DB in response to a >> monitoring probe is the wrong behavior for that. > > Are you sure it is? The thing is that when using socket activation it is > merely an implementation detail when a service is actually really > started. If you get a response you get a response and that's what you > probably want to monitor. and what he does not understand is that the socket is only needed LOCAL nagios as brought example normally runs on a monitoring host and checks the TCP port, sad enough that we have to explain this the mysql-maintainer where will a monitoring over the network trigger the socket below? TCP port is directly mysqld in this case [root@srv-rhsoft:~]$ cat /lib/systemd/system/mysqld.socket [Unit] Description=MySQL Database activation socket [Socket] ListenStream=/var/lib/mysql/mysql.sock [Install] WantedBy=sockets.target
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