Have gotten 2 Redis instances installed, with one being a master. That is working remarkably well and with no headaches.
I'm now trying to get my HAProxy/keepalived nodes to handle some sort of failover.
1) Is that even possible - setting up a node as the master and the other as backup? This is what I am doing with my MySQL nodes:
server 192.168.32.33 192.168.32.33:3306 check backup server 192.168.32.34 192.168.32.34:3306 check
2) If so, is there updated documentation on this? I've followed the documentation on the HAProxy's blog, as referenced below:
ServerFault article: Redis sentinel + HAProxy failover
But the nodes are showing up as down, even though I can use them via the CLI and other clients:
Using the CLI, if I issue the commands in the tcp-checks, the responses match the expected returns in the conf. (note: we don't have authentication turned on yet on the Redis nodes).
Here's my haproxy.cfg - starting with last line of my MySQL section
server 192.168.32.34 192.168.32.34:3306 check defaults REDIS mode tcp timeout connect 4s timeout server 30s timeout client 30s frontend ft_redis bind *:6379 name redis default_backend bk_redis backend bk_redis option tcp-check tcp-check send PINGrn tcp-check expect string +PONG tcp-check send info replicationrn tcp-check expect string role:master tcp-check send QUITrn tcp-check expect string +OK server Site2DB3 192.168.32.36:6379 check inter 1s server Site1DB3 192.168.22.36:6379 check inter 1s