Accessing GCP Redis from a service within Kubernetes (istio)

General Discussions
1

I intend to access a Redis instance running within GCP by a service running on GKE. Having done the following within service’s deployment yaml, wherein REDISHOST is the configmap set within the cluster, I keep receiving the ECONNREFUSED error.
There are no egress firewall settings within istio/kubernetes which might have prevented this connection from GKE to Redis.
I tried creating a VM and use telnet & redis-cli on it, which worked smoothly.

Seeking further help and guidance.

> apiVersion: apps/v1
> kind: Deployment
> metadata:
>   labels:
>     app: sockets
>   name: sockets
> spec:
>   replicas: 2
>   selector:
>     matchLabels:
>       app: sockets
>   template:
>     metadata:
>       labels:
>         app: sockets
>     spec:
>       containers:
>         - image: <sockets>
>           env:
>             - name: REDISHOST
>               valueFrom:
>                 configMapKeyRef:
>                   name: redishost
>                   key: REDISHOST
>           imagePullPolicy: IfNotPresent
>           name: sockets
>           ports:
>             - containerPort: 3000
2

Does the variable get set to what you expect it to? Because it sounds like you’ve done a lot of other troubleshooting already, so maybe something as obvious as that is the cause.