manual:appendix:other_issues
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manual:appendix:other_issues [2018/07/05 06:07] martins-v fixing page number |
manual:appendix:other_issues [2018/07/11 05:35] (current) martins-v updated version of recommendations |
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| === Login and systemd === | === Login and systemd === | ||
| - | Sometimes you use a //zabbix// user not only to run Zabbix, but also to log in to a host using SSH. If that host is running Zabbix you might crash it on logging out. In this case you will get something like the following in the Zabbix server log: | + | We recommend creating a //zabbix// user as system user, that is, without ability to log in. Some users ignore this recommendation and use the same account to log in (e. g. using SSH) to host running Zabbix. This might crash Zabbix daemon on log out. In this case you will get something like the following in Zabbix server log: |
| zabbix_server [27730]: [file:'selfmon.c',line:375] lock failed: [22] Invalid argument | zabbix_server [27730]: [file:'selfmon.c',line:375] lock failed: [22] Invalid argument | ||
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| zabbix_server [27706]: [file:'log.c',line:238] lock failed: [22] Invalid argument | zabbix_server [27706]: [file:'log.c',line:238] lock failed: [22] Invalid argument | ||
| - | and in the Zabbix agent log: | + | and in Zabbix agent log: |
| zabbix_agentd [27796]: [file:'log.c',line:238] lock failed: [22] Invalid argument | zabbix_agentd [27796]: [file:'log.c',line:238] lock failed: [22] Invalid argument | ||
| - | This happens because of the default systemd setting ''RemoveIPC=yes'' configured in ''/etc/systemd/logind.conf''. When you log out of the system the semaphores created by zabbix previously are removed which causes the crash. | + | This happens because of default systemd setting ''RemoveIPC=yes'' configured in ''/etc/systemd/logind.conf''. When you log out of the system the semaphores created by Zabbix previously are removed which causes the crash. |
| A quote from systemd documentation: | A quote from systemd documentation: | ||
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| root user and other system users are excluded from the effect of this setting. Defaults to "yes". | root user and other system users are excluded from the effect of this setting. Defaults to "yes". | ||
| - | To fix this issue and continue using a //zabbix// user to log in/out of the system, set ''RemoveIPC=no'' in ''/etc/systemd/logind.conf'' and run ''systemctl reboot'' to reboot the system. | + | There are 2 solutions to this problem: |
| + | - (recommended) Stop using //zabbix// account for anything else than Zabbix processes, create a dedicated account for other things. | ||
| + | - (not recommended) Set ''RemoveIPC=no'' in ''/etc/systemd/logind.conf'' and reboot the system. | ||