fix: self-healing patch for CrashLoopBackOff in crash-test-55b8b665f4-hjqjs

[aftabkh4n]

Self-Healing Patch

This PR was opened automatically by the self-healing-k8s system.

Failure detected

• Pod: crash-test-55b8b665f4-hjqjs
• Namespace: default
• Type: CrashLoopBackOff
• Detected at: 2026-04-20 06:19:52 UTC

Root cause

The application cannot establish a connection to the PostgreSQL database at postgres://db:5432. The pod is attempting to start but fails immediately when trying to connect to the database service, causing a CrashLoopBackOff. This indicates either: (1) the database service is not running or not accessible, (2) DNS resolution for 'db' hostname is failing, (3) the database service is not listening on port 5432, or (4) network connectivity between the pod and database is blocked.

Severity

Critical

Suggested fix

1. Verify the PostgreSQL database pod/service is running in the cluster by checking 'kubectl get pods' and 'kubectl get svc' for the database. 2. Confirm the service name is 'db' and it's in the same namespace (default) or adjust the connection string. 3. Test DNS resolution inside the pod: 'kubectl exec crash-test-55b8b665f4-hjqjs -- nslookup db'. 4. Verify the database is listening on port 5432: 'kubectl exec crash-test-55b8b665f4-hjqjs -- nc -zv db 5432'. 5. Check network policies aren't blocking traffic between the pods. 6. Verify database credentials in secrets/environment variables match the application's connection attempt. 7. Add readinessProbe and livenessProbe with appropriate initialDelaySeconds to allow database startup time before the app connects.

Proposed code change

apiVersion: apps/v1
kind: Deployment
metadata:
name: crash-test
spec:
template:
spec:
containers:
- name: crash-test
image: crash-test:latest
env:
- name: DATABASE_HOST
value: "db"
- name: DATABASE_PORT
value: "5432"
readinessProbe:
exec:
command:
- /bin/sh
- -c
- nc -zv db 5432
initialDelaySeconds: 30
periodSeconds: 10
livenessProbe:
exec:
command:
- /bin/sh
- -c
- nc -zv db 5432
initialDelaySeconds: 60
periodSeconds: 15

---

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