A troubleshooting guide for Kubernetes, the system that runs containerised applications across a cluster.

Use it to investigate CrashLoopBackOff, Pending pods, broken DNS or networking, stuck rollouts, storage mounting problems, and degraded cluster health.

It helps identify why pods, networking, storage, or application rollouts are failing by examining the cluster with kubectl.

k8s-debug — Skill for Claude Code by akin-ozer/cc-devops-skills

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add akin-ozer/cc-devops-skills --skill k8s-debug

Clone the repo

git clone --depth 1 https://github.com/akin-ozer/cc-devops-skills

Made for: Claude Code.

Or install devops-skills-plugin, the plugin that ships this one along with the rest of its 31 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/akin-ozer/cc-devops-skills/k8s-debug/github.svg)](https://agentmods.dev/skills/akin-ozer/cc-devops-skills/k8s-debug)

Your own site

<a href="https://agentmods.dev/skills/akin-ozer/cc-devops-skills/k8s-debug"><img src="https://agentmods.dev/badge/skills/akin-ozer/cc-devops-skills/k8s-debug/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/akin-ozer/cc-devops-skills/k8s-debug"><img src="https://agentmods.dev/badge/skills/akin-ozer/cc-devops-skills/k8s-debug.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,757 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

Socket pass 15 Sept 2026
Snyk pass 15 Sept 2026
NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00032	$0.02757
Opus 5.5	$0.00013	$0.01103
Sonnet 5.5	$0.00006	$0.00551
Haiku 4.5	$0.00003	$0.00276

Measured 2mo ago against content hash e1d4a3e51615, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

k8s-debug scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

The scan reads SKILL.md. This mod also ships 5 executable files (scripts/cluster_health.sh, scripts/network_debug.sh, scripts/pod_diagnostics.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- In-container debug tools (`nslookup`, `getent`, `curl`, `wget`, `ip`) for deep network tests.

devops-skills-plugin/skills/k8s-debug/SKILL.md · 339 lines

How it starts

The opening of the file, as written. The whole thing — 339 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kubernetes Debugging Skill

Overview

Systematic toolkit for debugging Kubernetes clusters, workloads, networking, and storage with a deterministic, safety-first workflow.

Trigger Phrases

Use this skill when requests resemble:

"My pod is in CrashLoopBackOff; help me find the root cause."
"Service DNS works in one pod but not another."
"Deployment rollout is stuck."
"Pods are Pending and not scheduling."
"Cluster health looks degraded after a change."
"PVC is pending and pods cannot mount storage."

Prerequisites

Run from the skill directory (devops-skills-plugin/skills/k8s-debug) so relative script paths work as written.

Required

kubectl installed and configured.
An active cluster context.
Read access to namespaces, pods, events, services, and nodes.

Quick preflight:

kubectl config current-context
kubectl auth can-i get pods -A
kubectl auth can-i get events -A
kubectl get ns

Optional but Recommended

jq for more precise filtering in ./scripts/cluster_health.sh.
Metrics API (metrics-server) for kubectl top.
In-container debug tools (nslookup, getent, curl, wget, ip) for deep network tests.

Fallback behavior:

If optional tools are missing, scripts continue and print warnings with reduced output.
If kubectl top is unavailable, continue with kubectl describe and events.

When to Use This Skill

Use this skill for:

Pod failures (CrashLoopBackOff, ImagePullBackOff, Pending, OOMKilled)
Service connectivity or DNS resolution issues
Network policy or ingress problems
Volume and storage mount failures
Deployment rollout issues
Cluster health or performance degradation
Resource exhaustion (CPU/memory)
Configuration problems (ConfigMaps, Secrets, RBAC)

Safety Rules for Disruptive Commands

Default mode is read-only diagnosis first. Only execute disruptive commands after confirming blast radius and rollback.

Commands requiring explicit confirmation:

kubectl delete pod ... --force --grace-period=0
kubectl drain ...
kubectl rollout restart ...
kubectl rollout undo ...
kubectl debug ... --copy-to=...

Read the full file on GitHub · 339 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 339 lines · 32 tokens per session scan A e1d4a3e51615

Subscribe to this mod's changes

k8s-debug is a skill published in the GitHub repository akin-ozer/cc-devops-skills (332 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 32 tokens to every session and 2,757 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Containers Debugging DevOps and cloud

k8s-debug next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
k8s-debugakin-ozer/cc-devops-skills	Skill	332	3mo ago	Apache-2.0	A	32	Claude Code
hermes-s6-container-supervisionNousResearch/hermes-agent	Skill	261k	yesterday	MIT	A	20	Claude Code, Codex
smoke-testgarrytan/gbrain	Skill	32k	yesterday	MIT	A	79	Claude Code
competition-container-runtimezhaoxuya520/reverse-skill	Skill	44k	1mo ago	MIT	A	109	Codex
aks-troubleshootingmicrosoft/skills	Skill	3.2k	yesterday	MIT	A	221	Claude Code
aks-gpu-inferencemicrosoft/skills	Skill	3.2k	yesterday	MIT	A	114	Claude Code
aks-network-capturemicrosoft/skills	Skill	3.2k	yesterday	MIT	A	75	Claude Code

k8s-debug