Finalmente, conserte-o. O Systemd requer redis para rodar não-daemonised, então a configuração precisa mudar:
# /etc/redis.conf
daemonize yes # << comment this out
Eu instalei o redis em uma nova caixa do CentOS 7, mas não consigo iniciá-lo usando systemctl.
Foi instalado assim:
rpm -i http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-0.2.noarch.rpm
yum install redis
A tentativa de iniciá-lo assim pareceu falhar silenciosamente (não houve saída):
systemctl start redis-server # also tried redis-server.service
Veja o que acontece ao tentar se conectar:
redis-cli
Could not connect to Redis at 127.0.0.1:6379: Connection refused
not connected>
Mas começar manualmente funciona:
[root@redis ~]# redis-server /etc/redis.conf
[root@redis ~]# redis-cli
127.0.0.1:6379>
Alguém sabe o que está errado ou como depurar isso?
UPDATE: a saída de /var/log/redis/redis.log está abaixo. Btw é um 512mb RAM VPS.
[1972] 29 Jul 18:52:16.258 # You requested maxclients of 10000 requiring at least 10032 max file descriptors.
[1972] 29 Jul 18:52:16.258 # Redis can't set maximum open files to 10032 because of OS error: Operation not permitted.
[1972] 29 Jul 18:52:16.258 # Current maximum open files is 1024. maxclients has been reduced to 4064 to compensate for low ulimit. If you need higher maxclients increase 'ulimit -n'.
_._
_.-''__ ''-._
_.-'' '. '_. ''-._ Redis 2.8.13 (00000000/0) 64 bit
.-'' .-'''. '''\/ _.,_ ''-._
( ' , .-' | ', ) Running in stand alone mode
|'-._'-...-' __...-.''-._|'' _.-'| Port: 6379
| '-._ '._ / _.-' | PID: 1972
'-._ '-._ '-./ _.-' _.-'
|'-._'-._ '-.__.-' _.-'_.-'|
| '-._'-._ _.-'_.-' | http://redis.io
'-._ '-._'-.__.-'_.-' _.-'
|'-._'-._ '-.__.-' _.-'_.-'|
| '-._'-._ _.-'_.-' |
'-._ '-._'-.__.-'_.-' _.-'
'-._ '-.__.-' _.-'
'-._ _.-'
'-.__.-'
[1972] 29 Jul 18:52:16.259 # Server started, Redis version 2.8.13
[1972] 29 Jul 18:52:16.259 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
[1972] 29 Jul 18:52:16.260 * DB loaded from disk: 0.001 seconds
[1972] 29 Jul 18:52:16.260 * The server is now ready to accept connections on port 6379
[1972] 29 Jul 18:52:16.265 # User requested shutdown...
[1972] 29 Jul 18:52:16.265 * Saving the final RDB snapshot before exiting.
[1972] 29 Jul 18:52:16.267 * DB saved on disk
[1972] 29 Jul 18:52:16.267 * Removing the pid file.
[1972] 29 Jul 18:52:16.267 # Redis is now ready to exit, bye bye...
e status:
[root@redis ~]# systemctl status redis-server
redis-server.service - Redis persistent key-value database
Loaded: loaded (/usr/lib/systemd/system/redis-server.service; disabled)
Active: inactive (dead)
Jul 29 18:52:16 redis systemd[1]: Starting Redis persistent key-value database...
Jul 29 18:52:16 redis systemd[1]: Started Redis persistent key-value database.