Tyk gateway connecting to redis cluster

Support Installation and Deployment
1

I’m trying to connect tyk-gateway or tyk-hybrid v2.3.8 (tried both) to a redis cluster 4.0.1. The cluster consists of 3 master and 6 slave nodes.
The config:

"storage": {
    "type": "redis",
    "enable_cluster": true,
    "hosts" : {
        "10.10.10.59": "7001",
        "10.10.10.61": "7002",
        "10.10.10.58": "7003",
        "10.10.10.60": "7004",
        "10.10.10.59": "7005",
        "10.10.10.61": "7006",
        "10.10.10.58": "7007",
        "10.10.10.60": "7008",
        "10.10.10.59": "7009"
    },
    "username": "",
    "password": "test123",
    "database": 0,
    "optimisation_max_idle": 500

If I specify 3 to 9 of the cluster nodes I get the following message:

time=“Sep 7 13:33:49” level=info msg=“–> Using clustered mode”
time=“Sep 7 13:33:49” level=info msg=“Connection dropped, connecting…”
time=“Sep 7 13:33:49” level=info msg=“–> Using clustered mode”

tyk doesn’t continue at this point.

If I specify only 1 or 2 redis nodes then tyk does continue and listens to incoming requests. However the error message I get is:

time=“2017-09-07T13:40:14Z” level=error msg=“Transacton failed: dial tcp: address tcp/7001@17001: unknown port”

7001 is the port of one redis node and 17001 is the internal redis-bus-port that tyk should not worry about.

Normally a redis client with cluster support only needs one node to get the info of the whole cluster. What do I have to specify for tyk?

2

Are you running in docker?

Tyk needs all redis nodes. The client doesn’t work that way.

If running in docker you might need to set the environment variable:

REDIGOCLUSTER_SHARDCOUNT=128

(Or a higher value).

This can prevent the lock.

3

Yes, I use docker. 128 didn’t work for me but 256 works!
There’s still one “Transacton failed: dial tcp: address tcp/7001@17001: unknown port” on startup but doesn’t show up again. I haven’t done any redis failover/failure tests yet though.