Check_MK Werk 4901: Reworked Livestatus Proxy to be more scalable

ID: 4901 Title: Reworked Livestatus Proxy to be more scalable Component: Livestatus Proxy Level: 2 Class: New feature Version: 1.5.0i1 The livestatus proxy daemon has been reworked to use a multi process architecture. It now has a master process that mainly cares about monitoring the site processes. Each connected site has an own subprocess that manages all channels to this site and the clients that use these channels to communicate with the sites. When you have a look at ps/top you should see something like this: C+: OMD[heute]:~$ ps -ef | grep liveproxyd UID PID PPID C STIME TTY TIME CMD heute 9261 1 0 11:40 ? 00:00:00 liveproxyd[master] heute 9262 9261 0 11:40 ? 00:00:00 liveproxyd[heute_slave_1] heute 9263 9261 0 11:40 ? 00:00:00 liveproxyd[heute_slave_2] C-: As you can may see there is the master process that has the process <tt>1</tt> as parent process. The site processes have the master as parent. When one site process terminates for some reason the master will restart it. When the master is terminated all site processes will terminate too. In case of a restart or config reload the master will restart itself and stop all site processes and restart them again. With this change the load of the livestatus proxy will now spread over multiple CPUs. Side note: There is a new global setting <i>Logging of the Livestatus Proxy</i> that can be used to control the detail level of the log entries written to the <tt>var/log/liveproxyd.log</tt> log file. In case you experience any issues with the livestatus proxy daemon take a look at this log file and maybe increase the log level to get more details.