Hi

I want to run Cassandra container in GCP and want to orchestrate the containers 
using Kubernetes.

I have a Cassandra image in my Docker Registry. Following the steps from the 
following tutorial, I have created a cluster and have Cassandra running on it. 
https://cloud.google.com/kubernetes-engine/docs/tutorials/hello-app#step_4_create_a_cluster

These are the steps I executed

  *   get cassandra image - docker pull manuchadha25/codingjedi:3.11.4
  *   check that the images exists locally- docker images. Also check that the 
image runs - docker run manuchadha25/cassandra:3.11.4
  *   run on GCP console - export PROJECT_ID=project-id of google project
  *   run on GCP console - gcloud auth configure-docker - maybe not required as 
I want to skip putting the image in container registry.
  *   gcloud config set project $PROJECT_ID
  *   gcloud config set compute/zone compute-zone --num-nodes 2
  *   gcloud container clusters create codingjedi-cassandra-cluster 
--num-nodes=2
  *   check cluster is up - gcloud compute instances list
  *   kubectl create deployment codingjedi-cassandra-app 
--image=docker.io/manuchadha25/cassandra:3.11.4
  *   kubectl scale deployment codingjedi-cassandra-app --replicas=3
  *   kubectl autoscale deployment codingjedi-cassandra-app --cpu-percent=80 
--min=3 --max=5
  *   check all is fine- kubectl get pods
  *   kubectl expose deployment codingjedi-cassandra-app 
--name=codingjedi-cassandra-app-service --type=LoadBalancer --port 9042 
--target-port 9042
  *   check service is running - kubectl get service
  *   copy external ip address and from laptop run cqlsh external-ip 9042. This 
should start cqlsh. I am able to connect with the cluster from my laptop using 
the external IP. – cqlsh external-ip 9042

My concern is that I have not provided any configuration anywhere which would 
make the different Cassandra nodes work together. So while I have created a 
Kubernetes cluster, I have not created a Cassandra cluster. Am I correct? I 
suppose I need to do more to make the nodes work as Cassandra cluster. How do I 
do that? I mean specify SEED_ADDRESS, LISTENING address, set an external data 
volume so that the data persists etc.?

Regards
Manu


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