[RCA] crashloop-test/instavote: The `crashloop-test` deployment is failing because the pod's...

[initcron]

Root Cause Analysis Report

Resource: crashloop-test
Kind: deployments
Namespace: instavote

RCA Report

Resource: deployments/crashloop-test
Namespace: instavote
Generated: 31/12/2025, 11:01:55 AM

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Symptoms / Initial Diagnosis

The following symptoms triggered this RCA:

• The deployment 'crashloop-test' in namespace 'instavote' is unavailable because the pod is continuously crashing. The 'Available' condition is 'False' with the reason 'MinimumReplicasUnavailable'.

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Root Cause

The crashloop-test deployment is failing because the pod's container exits with code 1 after a short sleep, as configured in its command.

Confidence: 85%

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Evidence

• The pod's logs show that the container starts, sleeps for 5 seconds, and then exits with code 1, causing the pod to restart repeatedly.

• The deployment is marked as unavailable because the pod is never in a ready state.

• While the events show other issues (failed image pulls, missing secrets, unhealthy probes), these are not related to the crashloop-test deployment, which is the focus of this analysis.

• step-1: The describe pod output shows the container's command explicitly exits with code 1 after a short sleep. The deployment's Available condition is False due to MinimumReplicasUnavailable.

• step-2: The pod's logs confirm that the application starts, sleeps for 5 seconds, and then exits.

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Remediation Options

Option A

Modify the container command to prevent the immediate exit

Low Risk | Quick

Change the command in the deployment's pod template to keep the container running. For example, replace the 'exit 1' with a command that runs indefinitely, like 'sleep 3600'.

Command:

kubectl edit deployment crashloop-test -n instavote

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Analysis Steps

Click to expand step-by-step analysis

[OK] Planning

Plan generated: The deployment 'crashloop-test' is unavailable due to a pod crashing repeatedly, likely caused by configuration issues or resource constraints.

[OK] Describe the pod to identify the cause of the crash

Name:                   crashloop-test
Namespace:              instavote
CreationTimestamp:      Sun, 07 Dec 2025 15:25:25 +0530
Labels:                 app=crashloop-test
Annotations:            deployment.kubernetes.io/revision: 1
Selector:               app=crashloop-test
Replicas:               1 desired | 1 updated | 1 total | 0 available | 1 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  25% max unavailable, 25% max surge
Pod Template:
  Labels:  app=crashloop-test
  Containers:
   crash-app:
    Image:      busybox:latest
    Port:       <none>
    Host Port:  <none>
    Command:
      sh
      -c
      echo 'Starting app...'; sleep 5; exit 1
    Limits:
      cpu:     200m
      memory:  64Mi
    Requests:
      cpu:     100m
      memory:  32Mi
    Environment:
      DATABASE_URL:  postgresql://missing-host:5432/db
    Mounts:          <none>
  Volumes:           <none>
  Node-Selectors:    <none>
  Tolerations:       <none>

[OK] Examine the pod's logs for error messages

Starting app...

[OK] Check recent events in the namespace for related errors or warnings

[Warning] FailedMount: MountVolume.SetUp failed for volume "missing-secret-volume" : secret "missing-secret-does-not-exist" not found
[Normal] Pulling: Pulling image "busybox:latest"
[Warning] BackOff: Back-off restarting failed container crash-app in pod crashloop-test-6968688c54-t2dsz_instavote(8030d689-513d-462c-8e57-fb71316f1a21)
[Normal] Pulled: (combined from similar events): Successfully pulled image "busybox:latest" in 2.281s (2.281s including waiting). Image size: 1913613 bytes.
[Normal] BackOff: Back-off pulling image "nonexistent-registry.io/fake-app:v1.0.0"
[Warning] Failed: Error: ImagePullBackOff
[Warning] Failed: Failed to pull image "nonexistent-registry.io/fake-app:v1.0.0": failed to pull and unpack image "nonexistent-registry.io/fake-app:v1.0.0": failed to resolve reference "nonexistent-registry.io/fake-app:v1.0.0": failed to do request: Head "https://nonexistent-registry.io/v2/fake-app/manifests/v1.0.0": dial tcp: lookup nonexistent-registry.io on 192.168.65.254:53: 

[...] Generating Conclusion

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Generated by KubeAgentics RCA