docker-library / docker-library/cassandra
"OOMKilled" and "CrashLoopBackOff" errors deploying Cassandra on Minikube
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Description
Previously I had 32GB RAM on my laptop and could deploy Cassandra with the following .yaml file and no issues on a 3-nodes Minikube cluster, each node had an 8GB RAM:
apiVersion: v1
kind: Service
metadata:
name: cassandra-srv
spec:
type: NodePort
ports:
- port: 9042
targetPort: 9042
nodePort: 30042
selector:
app: cassandra
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: cassandra
spec:
serviceName: cassandra-srv
replicas: 2
selector:
matchLabels:
app: cassandra
template:
metadata:
labels:
app: cassandra
spec:
containers:
- name: cassandra
image: cassandra:latest
ports:
- containerPort: 9042
env:
- name: CASSANDRA_AUTHENTICATOR
value: PasswordAuthenticator
- name: CASSANDRA_AUTHORIZATION
value: CassandraAuthorizer
- name: CASSANDRA_PASSWORD_SEEDER
value: "true"
- name: CASSANDRA_SUPERUSER_PASSWORD
value: "11111"
- name: CASSANDRA_SEEDS
value: cassandra-0.cassandra-srv.default.svc.cluster.local
volumeMounts:
- name: cassandra-data
mountPath: /var/lib/cassandra
volumeClaimTemplates:
- metadata:
name: cassandra-data
spec:
accessModes: ["ReadWriteOnce"]
resources:
requests:
storage: 1Gi
Then I decided to improve my laptop and replaced the RAM kit with a new 64GB RAM kit. After I did minikube delete and created a new cluster, this time with RAM capacity doubled using the following command (in fact I just replaced -memory=8192 with -memory=16384 ) :
minikube start --driver=docker \
--cpus=2 --memory=16384 --disk-size=16g \
--nodes=3 --addons=registry \
--insecure-registry="10.0.0.0/24" \
--insecure-registry="192.168.49.0/24"
When I execute skaffold run with all the previous manifest files and nothing changed at all, I do see "OOMKilled" and "CrashLoopBackOff" errors.
I did also tried to add resources as follows but wasn't helpful:
resources:
requests:
memory: "4Gi"
cpu: "1"
limits:
memory: "8Gi"
cpu: "2"
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the Kubernetes Service and StatefulSet manifest shown in the issue, then reproduce the deployment with the listed minikube start and skaffold run commands. Inspect the Cassandra pod status, events, and logs to determine why the containers are OOMKilled and entering CrashLoopBackOff. Done means the existing deployment runs successfully without those errors.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cassandra, docker, kubernetes
- Domain
- databases, devops, infrastructure
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100