[RCA] loki-chunks-cache-0/monitoring: The pod `loki-chunks-cache-0` is in a `Pending` state becaus...

[initcron]

Root Cause Analysis Report

Resource: loki-chunks-cache-0
Namespace: monitoring
Confidence: 85%

Root Cause

The pod loki-chunks-cache-0 is in a Pending state because there are insufficient memory resources available on the nodes to satisfy the pod's request of 9830Mi and the pod does not tolerate the node-role.kubernetes.io/control-plane taint on the control plane node.

Reasoning

The pod description confirms that the pod requests 9830Mi of memory (Step 1). The node description shows that the available memory on the node is approximately 10Gi (Step 2). The Prometheus query for memory usage across nodes indicates that available memory is around 3.7Gi, which is less than the requested 9830Mi. The node also has a taint node-role.kubernetes.io/control-plane which the pod does not tolerate, preventing it from being scheduled on the control plane node.

Evidence

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Recommended Remediations

1. Add a toleration to the pod specification (medium risk, quick effort)
   Add a toleration to the pod spec to allow the pod to be scheduled on nodes with the node-role.kubernetes.io/control-plane taint. This is a risky solution if the pod is not designed to run on control plane nodes.

2. Increase available memory in the cluster (low risk, complex effort)
   Increase the memory available in the cluster by adding more nodes or increasing the memory of the existing nodes. This might involve resizing the underlying VMs or adding new VMs to the cluster.

3. Reduce the memory request of the pod (medium risk, moderate effort)
   Reduce the memory request of the loki-chunks-cache-0 pod to a value that is within the available memory capacity of the nodes. This might impact the performance of the Loki chunks cache.

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Generated by KubeAgentics RCA