Clustered Redis Dockerfile for Mesos/Marathon
TODO - clustering won't work currently as I can't figure out how to force Redis to use a specific cluster port
Launching Redis
Redis in clustered mode expects two ports to be open, the main port and that port + 10000. This JSON will have Marathon create a container:
{
"container": {
"type": "DOCKER",
"docker": {
"image": "aphexddb/redis:latest"
}
},
"id": "redis",
"instances": "1",
"cpus": "0.5",
"mem": "512",
"ports": [6379,16379]
}
curl -X POST -H "Content-Type: application/json" http://marathon-master:8080/v2/apps -d@redis.json
When launching the container Marathon will apply $PORT0 and $PORT1 environment variables to your the container with the random ports it chose. The startup script uses those values to launch Redis.
Use with haproxy
If you use the super cool haproxy-marathon-bridge haproxy will automagically know about all the Redis nodes. Ex:
listen redis
bind 0.0.0.0:6379
mode tcp
option tcplog
balance leastconn
server redis-1 server.host.com:31864 check
listen redis
bind 0.0.0.0:16379
mode tcp
option tcplog
balance leastconn
server redis-1 server.host.com:31865 check
Redis config
The following are the config changes made from the default:
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes
dir /data