K
Q

How to talk to Kubernetes CRD service within a pod in the same k8s cluster?

2/7/2019

I installed a Spark on K8s operator in my K8s cluster and I have an app running within the k8s cluster. I'd like to enable this app to talk to the sparkapplication CRD service. Can I know what would be the endpoint I should use? (or what's the K8s endpoint within a K8s cluster)

-- injoy
kubernetes
kubernetes-custom-resources

Similar Questions

Nginx routing for kubernetes services
Failing K8s rabbitmq-peer-discovery-k8s clustering
how can I spread surefire junit tests across different compute resources
Can we interact and troubleshoot containers inside kubernetes without command line access?
Prometheus operator "Error opening query log file: permission denied"
Kubernetes: mount certificate to pod
Error: failed to start container " executable file not found in $PATH: unknown"
During the deployment process, how do you get your existing app data into an application created by a public Helm Chart for a LAMP stacks?

1 Answer

2/7/2019

It's clearly documented here. So basically, it creates a NodePort type of service. It also specifies that it could create an Ingress to access the UI. For example:

...
status:
  sparkApplicationId: spark-5f4ba921c85ff3f1cb04bef324f9154c9
  applicationState:
    state: COMPLETED
  completionTime: 2018-02-20T23:33:55Z
  driverInfo:
    podName: spark-pi-83ba921c85ff3f1cb04bef324f9154c9-driver
    webUIAddress: 35.192.234.248:31064
    webUIPort: 31064
    webUIServiceName: spark-pi-2402118027-ui-svc
    webUIIngressName: spark-pi-ui-ingress
    webUIIngressAddress: spark-pi.ingress.cluster.com

In this case, you could use 35.192.234.248:31064 to access your UI. Internally within the K8s cluster, you could use spark-pi-2402118027-ui-svc.<namespace>.svc.cluster.local or simply spark-pi-2402118027-ui-svc if you are within the same namespace.

-- Rico
Source: StackOverflow