Enable Core Dump systemd
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Introduction
This is a HowToDO to enable Core Dump with systemd on PVE 4.0 (Debian Jessie).
Requirements
To activate you have to create
/etc/security/limits.d/core.conf /etc/sysctl.d/core.conf /var/lib/coredumps
Allow Dump from CLI
To allow root to core dump from cli.
Edit: /etc/security/limits.d/core.conf
root hard core unlimited root soft core unlimited
Allow Dump from Daemons
To allow all daemons witch are started by systemd to core dump.
Edit: /etc/systemd/system.conf add following
DefaultLimitCORE=infinity
Edit: /etc/sysctl.d/core.conf add following
kernel.core_pattern = /var/lib/coredumps/core-%e-sig%s-user%u-group%g-pid%p-time%t kernel.core_uses_pid = 1 fs.suid_dumpable = 2
Reboot Server
To activate this settings reboot the server.
Note: normally it should be enough to call
systemctl daemon-reexec
but it didn't work for me
Test it
To test if everything is working fine do this few steps to verify.
root@pve:~# systemctl status pveproxy.service ● pveproxy.service - PVE API Proxy Server Loaded: loaded (/lib/systemd/system/pveproxy.service; enabled) Active: active (running) since Mon 2015-05-11 08:54:50 CEST; 6h ago Process: 1280 ExecStart=/usr/bin/pveproxy start (code=exited, status=0/SUCCESS) Main PID: 1281 (pveproxy) CGroup: /system.slice/pveproxy.service ├─1281 pveproxy ├─1282 pveproxy worker ├─1283 pveproxy worker └─1284 pveproxy worker May 11 08:54:50 sasha pveproxy[1280]: Can't stat /usr/share/pve-manager/man...ry May 11 08:54:50 sasha pveproxy[1280]: at /usr/bin/pveproxy line 74. May 11 08:54:50 sasha pveproxy[1280]: Can't stat /usr/share/pve-manager/man...ry at /usr/bin/pveproxy line 74. May 11 08:54:50 sasha pveproxy[1281]: starting server May 11 08:54:50 sasha pveproxy[1281]: starting 3 worker(s) May 11 08:54:50 sasha pveproxy[1281]: worker 1282 started May 11 08:54:50 sasha pveproxy[1281]: worker 1283 started May 11 08:54:50 sasha pveproxy[1281]: worker 1284 started Hint: Some lines were ellipsized, use -l to show in full.
root@pve:kill -11 1281 root@pve:~# ls -hal /var/lib/coredumps/ total 3.1M drwxrwx-wx 2 root root 4.0K May 11 08:55 . drwxr-xr-x 50 root root 4.0K May 11 08:16 .. -rw------- 1 root www-data 88M May 11 15:43 core-pveproxy-sig11-user33-group33-pid13696-time1431351789
root@pve:~# systemctl start pveproxy.service