Resource configuration for single node bare metal K8 setup

K8ssandra help
1

I am trying to setup K8ssandra using the default .yaml file (Single-cluster install with helm | K8ssandra, Apache Cassandra on Kubernetes) on a single EC2 based K8 cluster. EC2 has 2vCPU and 8GB RAM. I have used the softPodAntiAffinity : true but still get insufficient CPU errors occasionally and also see one of the replicas not getting ready and stays at 0/2 (it doesn’t simply restart or CrashLoop but rather vanishes and gets regenerated).

Hence how can one setup the default 3 Cassandra instance setup on a limited hardware EC2. I don’t want to add an extra layer by installing inside Docker (minikube/kind) since I want the setup to utilize complete EC2 hardware without any hops.

.yaml that I have tried:

apiVersion: k8ssandra.io/v1alpha1
kind: K8ssandraCluster
metadata:
  name: demo
spec:
  cassandra:
    serverVersion: "4.0.1"
    datacenters:
      - metadata:
          name: dc1
        size: 3
        storageConfig:
          cassandraDataVolumeClaimSpec:
            storageClassName: standard
            accessModes:
              - ReadWriteOnce
            resources:
              requests:
                storage: 5Gi
        config:
          jvmOptions:
            heapSize: 512M
    softPodAntiAffinity : true
    resources:
      limits:
        cpu: "150m"
        memory: "1G"
      requests:
        cpu: "150m"
        memory: "1G"

and

apiVersion: k8ssandra.io/v1alpha1
kind: K8ssandraCluster
metadata:
  name: demo
spec:
  cassandra:
    serverVersion: "4.0.1"
    datacenters:
      - metadata:
          name: dc1
        size: 3
        storageConfig:
          cassandraDataVolumeClaimSpec:
            storageClassName: standard
            accessModes:
              - ReadWriteOnce
            resources:
              requests:
                storage: 5Gi
        config:
          jvmOptions:
            heapSize: 512M
        stargate:
          size: 1
          heapSize: 256M
        softPodAntiAffinity: true