How to achieve hazelcast syncing in kubernetes with different pod (App and Hazel insatnce)?
Please check the followings:
1. Discovery Strategy
For Kubernetes you need to use the HazelcastKubernetesDiscoveryStrategy class. It can be defined in the XML configuration or in the code (as in your case).
2. Labels
Check that the service for your Hazelcast cluster has the labels you specified. The same when it comes to the service name and namespace.
3. Configuration
There are two ways to configure the discovery: DNS Lookup and REST API. Each has special requirements. You mentioned DNS Lookup, but the configuration you've sent actually uses REST API.
DNS Lookup
Your Hazelcast cluster service must be headless ClusterIP.
spec: type: ClusterIP clusterIP: NoneREST API
You need to grant access for you app to access Kubernetes API. Please check: https://github.com/hazelcast/hazelcast-code-samples/blob/master/hazelcast-integration/kubernetes/rbac.yaml
Other helpful resources
- Hazelcast Kubernetes Code Sample
- Hazelcast OpenShift Client app (should also work in Kubernetes)