I have created with systemd a structure with multiple instances to run the same program several times with different parameters. My intention is that each instance is independent from the others, and in case one fails, it will be restarted, leaving the others unchanged.
This is my target unit:
[Unit]
Description=Cutter
After=FD-go-00_tree.service
After=FD-go-01_pre.service
[email protected] [email protected] [email protected] [email protected]
[Install]
WantedBy=FD-go-00_tree.service
This is my service unit:
[Unit]
Description="FD-cutter # %i - instance"
After=FD-go-00_tree.service
After=FD-go-01_pre.service
PartOf=FD-go-05_cutter.target
ConditionPathExists=/home/himarc/projects/multi-service/EnvironmentFile/FD-go-05_cutter_%i
# StartLimitIntervalSec in recent systemd versions
StartLimitInterval=0
[Service]
Type=simple
EnvironmentFile=/home/himarc/projects/multi-service/EnvironmentFile/FD-go-05_cutter_%i
ExecStart=/usr/bin/nice -n -1 /home/himarc/projects/bin/FD-cutter ${MyInput_1} ${MyInput_2} ${MyPath} %i
StandardOutput=file:/srv/FD/%i/trace/FD-log-cutter.log
StandardError=file:/srv/FD/%i/trace/FD-log-cutter.log
Restart=always
# time to sleep before restarting a service
RestartSec=1
[Install]
WantedBy=FD-go-00_tree.service
In case of an instance failure, not the single service is restarted but the entire target unit.
Aug 25 11:15:06 localhost kernel: [2493693.364584] FD-cutter[21251]: segfault at 4c8 ip 000055d7ee0d9e28 sp 00007f312186caf0 error 6 in FD-cutter[55d7ee0d2000+1a000]
Aug 25 11:15:06 localhost kernel: [2493693.364591] Code: f8 ff ff 48 8d 15 08 22 21 00 48 8d 35 d1 26 21 00 48 8b 05 32 25 21 00 48 8d 3d 2b 25 21 00 48 c7 05 e8 21 21 00 00 00 00 00 <48> 89 88 c8 04 00 00 48 89 90 d0 04 00 00 48 89 e9 31 d2 e8 e0 dd
Aug 25 11:15:06 localhost systemd[1]: [email protected]: Main process exited, code=killed, status=11/SEGV
Aug 25 11:15:06 localhost systemd[1]: [email protected]: Failed with result 'signal'.
Aug 25 11:15:08 localhost systemd[1]: [email protected]: Service hold-off time over, scheduling restart.
Aug 25 11:15:08 localhost systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1.
Aug 25 11:15:08 localhost systemd[1]: Stopped target Cutter.
Aug 25 11:15:08 localhost systemd[1]: Stopping Cutter.
Aug 25 11:15:08 localhost systemd[1]: Stopping "FD-cutter # RC1P112 - instance"...
Aug 25 11:15:08 localhost systemd[1]: Stopping "FD-cutter # RC1P111 - instance"...
Aug 25 11:15:08 localhost systemd[1]: Stopping "FD-cutter # RC1P212 - instance"...
Aug 25 11:15:08 localhost systemd[1]: Stopped "FD-cutter # RC1P211 - instance".
Aug 25 11:15:08 localhost systemd[1]: Started "FD-cutter # RC1P211 - instance".
Aug 25 11:15:08 localhost systemd[1]: Stopped "FD-cutter # RC1P112 - instance".
Aug 25 11:15:08 localhost systemd[1]: Stopped "FD-cutter # RC1P111 - instance".
Aug 25 11:15:08 localhost systemd[1]: Stopped "FD-cutter # RC1P212 - instance".
Aug 25 11:15:08 localhost systemd[1]: Started "FD-cutter # RC1P212 - instance".
Aug 25 11:15:08 localhost systemd[1]: Started "FD-cutter # RC1P111 - instance".
Is there a way to restart only the failed service unit, without restart the others?
