diag-k8s-pod-crashloop

diag-k8s-pod-crashloop is a skill for Claude Code, Codex from seed-forge/harness-ai-kit. It costs 63 tokens per session (1,199 once invoked), scanned A, original, Apache-2.0.

A diagnostic runbook for Kubernetes Pods stuck in CrashLoopBackOff. A Pod is a Kubernetes unit that runs one or more containers; CrashLoopBackOff means a container keeps failing and Kubernetes waits longer between restart attempts.

In plain words
What is it for?
Use it to investigate repeatedly restarting Pods, inspect resource limits and restart behavior, check liveness and readiness probes, and verify images, ConfigMaps, Secrets, and persistent-volume mounts.
Why use it?
It helps identify whether repeated failures come from application errors, memory limits, image downloads, missing configuration, failed mounts, or health checks. It combines status, events, current and previous logs, and runtime settings.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to investigate repeatedly restarting Pods, inspect resource limits and restart behavior, check liveness and readiness probes, and verify images, ConfigMaps, Secrets, and persistent-volume mounts.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/seed-forge/harness-ai-kit/diag-k8s-pod-crashloop
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 seed-forge/harness-ai-kit --skill diag-k8s-pod-crashloop
Clone the repo
git clone --depth 1 https://github.com/seed-forge/harness-ai-kit

Made for: Claude Code, Codex.

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.

agentmods badge for diag-k8s-pod-crashloop

README.md
[![agentmods](https://agentmods.dev/badge/skills/seed-forge/harness-ai-kit/diag-k8s-pod-crashloop/github.svg)](https://agentmods.dev/skills/seed-forge/harness-ai-kit/diag-k8s-pod-crashloop)
Your own site
<a href="https://agentmods.dev/skills/seed-forge/harness-ai-kit/diag-k8s-pod-crashloop"><img src="https://agentmods.dev/badge/skills/seed-forge/harness-ai-kit/diag-k8s-pod-crashloop/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.

agentmods 80×15 button for diag-k8s-pod-crashloop

Your own site · 80×15
<a href="https://agentmods.dev/skills/seed-forge/harness-ai-kit/diag-k8s-pod-crashloop"><img src="https://agentmods.dev/badge/skills/seed-forge/harness-ai-kit/diag-k8s-pod-crashloop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,199 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Privilege Escalation · line 17
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 132
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00063 $0.01199
Opus 5 $0.00032 $0.00600
Sonnet 5 $0.00013 $0.00240
Haiku 4.5 $0.00006 $0.00120

Measured 11d ago against content hash 7abf3e165fe2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

diag-k8s-pod-crashloop scanned grade A with 0 findings 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 11d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/diag-k8s-pod-crashloop/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

K8s Pod CrashLoopBackOff Full-Chain Diagnostics

用途

当 Pod 反复重启、状态显示 CrashLoopBackOffError 时触发。本技能是自包含诊断 Runbook

输入

  • kubectl 上下文(kubeconfig)
  • 目标 Pod 名称 + Namespace

输出

  • CrashLoop 根因分析报告 + 修复建议

诊断步骤

Step 1: Pod 状态与事件

kubectl get pod {pod_name} -n {namespace} -o wide
kubectl describe pod {pod_name} -n {namespace}
# 关注 Events 区块:OOMKilled / Error / ImagePullBackOff / FailedMount

Step 2: 容器日志

# 当前容器日志(可能在 crash 后已清空)
kubectl logs {pod_name} -n {namespace} --all-containers=true --tail=100

# 上一次崩溃的日志
kubectl logs {pod_name} -n {namespace} --all-containers=true --previous --tail=200

Step 3: 重启原因分类

事件关键词 根因 典型修复
OOMKilled 内存超限 增大 resources.limits.memory 或修复内存泄漏
Error (exit code 1) 应用启动失败 检查日志、配置、依赖服务连通性
ImagePullBackOff 镜像拉取失败 检查 image tag、imagePullSecrets、registry 可达
FailedMount ConfigMap/Secret/PVC 挂载失败 检查引用是否存在
Liveness probe failed 健康检查超时 调整 initialDelaySeconds / timeoutSeconds
CreateContainerConfigError env/configMapKeyRef 缺失 检查引用的 ConfigMap/Secret key
BackOff restarting 重启间隔递增 以上任一原因的持续重试

Step 4: 资源限制与请求

kubectl get pod {pod_name} -n {namespace} -o jsonpath='{range .spec.containers[*]}{.name}: requests={.resources.requests} limits={.resources.limits}{"\n"}{end}'

Step 5: 依赖检查

# ConfigMap/Secret 是否存在
kubectl get configmap -n {namespace} | grep {configmap_name}
kubectl get secret -n {namespace} | grep {secret_name}

# PVC 状态
kubectl get pvc -n {namespace} | grep {pvc_name}

# Service 端点
kubectl get endpoints {service_name} -n {namespace}

输出模板

K8s Pod CrashLoop Analysis Report
════════════════════════════════════════
Cluster:   {context}
Namespace: {namespace}
Pod:       {pod_name}
Node:      {node_name}
Time:      {timestamp}

Pod Status
  Phase:         {phase}
  Restart Count: {restart_count}
  Last State:    {last_state} (exit code: {exit_code})
  Reason:        {reason}

Events (last 10)
  {event_1}
  {event_2}
  ...

Container Logs (previous crash, last 20 lines)
  {log_lines}

Root Cause: {root_cause}

Recommendations
  1. {fix_1}
  2. {fix_2}

Read the full file on GitHub · 147 lines

Files

What ships with it

3 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.

  1. 11d ago First seen · 147 lines · 63 tokens per session scan A 7abf3e165fe2

Subscribe to this mod's changes

diag-k8s-pod-crashloop is a skill published in the GitHub repository seed-forge/harness-ai-kit (22 stars, last pushed 11d ago), licensed Apache-2.0. It adds 63 tokens to every session and 1,199 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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