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.
npx skills add kudig-io/kudig-database --skill k8s-certificate-expirygit clone --depth 1 https://github.com/kudig-io/kudig-databaseWrote 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.
[](https://agentmods.dev/skills/kudig-io/kudig-database/k8s-certificate-expiry)<a href="https://agentmods.dev/skills/kudig-io/kudig-database/k8s-certificate-expiry"><img src="https://agentmods.dev/badge/skills/kudig-io/kudig-database/k8s-certificate-expiry/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.
<a href="https://agentmods.dev/skills/kudig-io/kudig-database/k8s-certificate-expiry"><img src="https://agentmods.dev/badge/skills/kudig-io/kudig-database/k8s-certificate-expiry.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.03907 |
| Opus 5.5 | $0.00000 | $0.01563 |
| Sonnet 5.5 | $0.00000 | $0.00781 |
| Haiku 4.5 | $0.00000 | $0.00391 |
Grade C, and why
k8s-certificate-expiry scanned grade C 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 1mo 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.
Reaches for credential fileshighPrivilege escalation
SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.
- **手动renew后kubeconfig失效** → 更新~/.kube/config中的证书数据 How it starts
The opening of the file, as written. The whole thing — 318 lines — stays where its author put it; the contents beside it link to each section on GitHub.
生产环境安全提示
本文档包含可直接执行的运维命令。执行前请确认：当前目标集群与 Namespace 是否正确；是否具备足够的 RBAC 权限；是否已在非生产环境验证。命令风险等级标注：🔴 高风险（可能造成数据丢失或服务中断）、🟡 中风险（会修改集群状态，但通常可回滚）、🟢 低风险/只读（信息收集，无副作用）。
证书过期问题诊断与修复
概述
[[kubernetes|Kubernetes]] 证书体系包含 API Server、[[etcd|etcd]]、[[kubelet|kubelet]]、frontend-proxy 等多组证书。证书过期会导致组件间通信失败、节点 NotReady 等严重后果。
注意: 本 Skill 涉及高风险的证书操作，默认执行模式为 L1-advisory（仅建议）。
症状识别
| # | 症状描述 | 检测方法 | 置信度 |
|---|---|---|---|
| S1 | x509 证书过期错误 | 日志中出现 certificate has expired |
0.95 |
| S2 | 节点突然 NotReady | kubectl get nodes |
0.80 |
| S3 | API Server 连接失败 | kubectl 命令报错 |
0.90 |
快速诊断
./scripts/diagnose-quick.sh
修复动作
低风险操作（只读/检查）
| # | 动作 | 命令 |
|---|---|---|
| R1 | 检查所有证书过期时间 | kubeadm certs check-expiration |
| R2 | 查看 kubelet 证书状态 | openssl x509 -in /var/lib/kubelet/pki/kubelet-client-current.pem -noout -dates |
高风险修复（人工执行）
| # | 修复动作 | 风险 |
|---|---|---|
| R3 | 使用 kubeadm 续期证书 | 需重启控制平面组件，可能导致短暂不可用 |
| R4 | 手动轮换 CA 证书 | 集群级操作，所有组件需重新签发证书 |
| R5 | 批准 kubelet CSR | 影响节点证书自动轮换 |
危险操作
- 动作:
kubeadm certs renew all && reboot- 风险: 控制平面重启期间集群不可用
- 确认要求: 是，需维护窗口
- 动作: 删除
/etc/kubernetes/pki目录- 风险: 导致集群完全不可恢复
- 确认要求: 是
验证修复
./scripts/verify-cert.sh
升级条件
- 证书续期后节点仍 NotReady → 升级至 SKILL-NODE-001
- CA 证书过期 → 升级至专家级事件响应
远程顾问信息收集
作为远程顾问，我无法直接连接你的集群。请帮我收集以下信息，我会根据你提供的内容给出准确的诊断建议。
第一步：快速确认（30 秒内回答）
- 影响范围：这个问题影响多少个节点 / Pod / 命名空间？
- 紧急程度：业务是否已中断？是否有用户投诉？
- 发生时间：问题是突然发生还是逐渐恶化？最近是否有变更？
第二步：关键信息（请提供你能获取的）
- kubectl 版本：
kubectl version --short的输出 - K8s 集群版本：
kubectl get nodes -o wide中的 VERSION 列 - 节点状态：控制平面节点是否正常？工作节点是否正常？
第三步：诊断信息（按需补充）
如果以下命令你无法执行，请直接告诉我「无法执行」，我会提供替代方案。
- 相关组件日志：
kubectl logs -n <namespace> <pod>的最后 30 行 - 节点资源：
kubectl top nodes或kubectl describe node <node>的 Capacity/Allocated resources - 近期变更：最近 24 小时是否有部署、扩缩容、配置变更？
如果信息不足
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.
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.
- 1mo ago Changed · +19 lines 505d4fbf6175
- 1mo ago First seen · 299 lines · 0 tokens per session scan C a08bec57975e
k8s-certificate-expiry is a skill published in the GitHub repository kudig-io/kudig-database (6 stars, last pushed yesterday), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 3,907 tokens. A static security scan graded it C with 1 finding (reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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