TODO - clustering won't work currently as I can't figure out how to force Redis to use a specific cluster port
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.
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
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