Having trouble getting my Redis sentinel systemd services to start.
I can run sentinels manually with success -- e.g.:
root@poolwc:/etc/redis# redis-sentinel ./sentinel.conf --sentinel
Three redis servers at 10.9.8.1, .2, .3
.2 and .3 are slaves to .1 and replication is working
redis
service user has 0600
r/w access to both redis.conf
and sentinel.conf
for all three hosts
For Slave1 and Slave2 (10.9.8.2 and 10.9.8.3) I have the following added to redis.conf
:
+ slaveof 127.0.0.1 6380
For Master, Slave1, and Slave2:
sentinel.conf
:
sentinel monitor mymaster 10.9.8.1 6379 2
sentinel down-after-milliseconds mymaster 60000
sentinel failover-timeout mymaster 180000
sentinel parallel-syncs mymaster 1
Output from master on service start:
root@poolwc:/etc/redis# systemctl start redis-sentinel
Job for redis-sentinel.service failed because the control process exited with error code. See "systemctl status redis-sentinel.service" and "journalctl -xe" for details.
root@poolwc:/etc/redis# systemctl status redis-sentinel.service
● redis-sentinel.service - Advanced key-value store
Loaded: loaded (/lib/systemd/system/redis-sentinel.service; enabled; vendor preset: enabled)
Active: inactive (dead) (Result: exit-code) since Mon 2018-02-26 21:54:12
PST; 6s ago Docs: http://redis.io/documentation, man:redis-sentinel(1) Process: 5376 ExecStopPost=/bin/run-parts --verbose /etc/redis/redis-sentinel.post-down.d (code=exited, status=0/SUCCESS) Process: 7893 ExecStart=/usr/bin/redis-sentinel /etc/redis/sentinel.conf (code=exited, status=1/FAILURE) Process: 7890 ExecStartPre=/bin/run-parts --verbose /etc/redis/redis-sentinel.pre-up.d (code=exited, status=0/SUCCESS)
Feb 26 21:54:12 poolwc systemd[1]: redis-sentinel.service: Control process exited, code=exited status=1
Feb 26 21:54:12 poolwc systemd[1]: Failed to start Advanced key-value store.
Feb 26 21:54:12 poolwc systemd[1]: redis-sentinel.service: Unit entered failed state.
Feb 26 21:54:12 poolwc systemd[1]: redis-sentinel.service: Failed with result 'exit-code'.
Feb 26 21:54:12 poolwc systemd[1]: redis-sentinel.service: Service hold-off time over, scheduling restart.
Feb 26 21:54:12 poolwc systemd[1]: Stopped Advanced key-value store.
Feb 26 21:54:12 poolwc systemd[1]: redis-sentinel.service: Start request repeated too quickly.
Feb 26 21:54:12 poolwc systemd[1]: Failed to start Advanced key-value store.
Output from Slave2 on service start -- running, but why the exit on failure?:
[root@ns1 etc]# systemctl start redis-sentinel
[root@ns1 etc]# systemctl status redis-sentinel
● redis-sentinel.service - Redis Sentinel
Loaded: loaded (/usr/lib/systemd/system/redis-sentinel.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/redis-sentinel.service.d
└─limit.conf
Active: active (running) since Mon 2018-02-26 21:55:58 PST; 5s ago
Process: 12876 ExecStop=/usr/libexec/redis-shutdown redis-sentinel (code=exited, status=1/FAILURE)
Main PID: 12944 (redis-sentinel)
CGroup: /system.slice/redis-sentinel.service
└─12944 /usr/bin/redis-sentinel *:26379 [sentinel]
Feb 26 21:55:58 ns1 redis-sentinel[12944]: | `-._`-._ _.-'_.-' | http://redis.io
Feb 26 21:55:58 ns1 redis-sentinel[12944]: `-._ `-._`-.__.-'_.-' _.-'
Feb 26 21:55:58 ns1 redis-sentinel[12944]: |`-._`-._ `-.__.-' _.-'_.-'|
Feb 26 21:55:58 ns1 redis-sentinel[12944]: | `-._`-._ _.-'_.-' |
Feb 26 21:55:58 ns1 redis-sentinel[12944]: `-._ `-._`-.__.-'_.-' _.-'
Feb 26 21:55:58 ns1 redis-sentinel[12944]: `-._ `-.__.-' _.-'
Feb 26 21:55:58 ns1 redis-sentinel[12944]: `-._ _.-'
Feb 26 21:55:58 ns1 redis-sentinel[12944]: `-.__.-'
Feb 26 21:55:58 ns1 redis-sentinel[12944]: 12944:X 26 Feb 21:55:58.490 # Sentinel ID is 659761a6f8328e59d43086ef3265450fcec5d2f5
Feb 26 21:55:58 ns1 redis-sentinel[12944]: 12944:X 26 Feb 21:55:58.490 # +monitor master mymaster 10.9.8.1 6379 quorum 2
Output from Slave2 on service start:
root@poolec:/etc/redis# systemctl start redis-sentinel
Job for redis-sentinel.service failed because the control process exited with error code. See "systemctl status redis-sentinel.service" and "journalctl -xe" for details.
root@poolec:/etc/redis# systemctl status redis-sentinel
● redis-sentinel.service - Advanced key-value store
Loaded: loaded (/lib/systemd/system/redis-sentinel.service; enabled; vendor preset: enabled)
Active: inactive (dead) (Result: exit-code) since Tue 2018-02-27 05:57:09 UTC; 5s ago
Docs: http://redis.io/documentation,
man:redis-sentinel(1)
Process: 4130 ExecStart=/usr/bin/redis-sentinel /etc/redis/sentinel.conf (code=exited, status=1/FAILURE)
Process: 4127 ExecStartPre=/bin/run-parts --verbose /etc/redis/redis-sentinel.pre-up.d (code=exited, status=0/SUCCESS)
Feb 27 05:57:09 poolec systemd[1]: redis-sentinel.service: Unit entered failed state.
Feb 27 05:57:09 poolec systemd[1]: redis-sentinel.service: Failed with result 'exit-code'.
Feb 27 05:57:09 poolec systemd[1]: redis-sentinel.service: Service hold-off time over, scheduling restart.
Feb 27 05:57:09 poolec systemd[1]: Stopped Advanced key-value store.
Feb 27 05:57:09 poolec systemd[1]: redis-sentinel.service: Start request repeated too quickly.
Feb 27 05:57:09 poolec systemd[1]: Failed to start Advanced key-value store.
None of them leave any output in /var/log/redis/
Any ideas?
Thanks very much!