k8s-network-troubleshooting SKILL.md skillA
k8s-network-troubleshooting from k8s-servant/k8s-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add k8s-servant/k8s-skills/k8s-network-troubleshooting@git:20261031.7e95e4fPins git:20261031.7e95e4f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- k8s-servant/k8s-skills
- Path
skills/k8s-network-troubleshooting/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261031.7e95e4f, committed Oct 31, 2026
- First version recorded
- Oct 24, 2026
- Size
- 11,021 bytes
- Repository stars
- 35
- License
- Apache-2.0
Use when traffic does not reach a workload in Kubernetes although its pods are running: a Service with no endpoints, a wrong selector or targetPort, connection refused or time-outs between pods, DNS names that do not resolve (NXDOMAIN, "server can't find"), a NetworkPolicy blocking traffic, or an Ingress or Gateway API route that does not route. Investigates with kubectl get and describe, asks before checks inside a container, and proposes fixes. Reads first and asks before changing anything.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Kubernetes network troubleshooting Find out why traffic does not get from a client to a workload, and propose a fix. **Read first, ask before changing.** Run the investigation commands freely. Run a command under an "Ask first" line only after the user approves that exact command; if your credentials do not allow it, give it to the user to run. Never run a "Proposed fix"; hand it to the user. Follow the path of a request: the client resolves the Service's name (DNS), connects to the Service's port, the Service forwards to the `targetPort` of its ready endpoints, and NetworkPolicies on both sides must allow it. Find the first step that fails. The commands use placeholders: `my-namespace` and `my-app` (the target Service and its workload), `my-other-namespace` and `my-web` (the client), and `my-pod`. Replace them with the real names. Never read Secrets. If output contains passwords, tokens or keys, do not repeat them. ## When to use - A client gets `connection refused`, time-outs, `502`/`503`, or "no endpoints" when calling a Service, while the target pods are `Running`. - A name does not resolve: `NXDOMAIN`, "server can't find", "bad address". …
Read the whole file at its exact version.
How to install
mdr add k8s-servant/k8s-skills/k8s-network-troubleshooting@sha256:c70ad88cf0b61fa0The line at the top of this page pins the label git:20261031.7e95e4f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_obs6ulscl4efw7wo)
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Versions
The registry has recorded 4 versions of this file, between Oct 24, 2026 and Oct 31, 2026, about one every 2 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261031.7e95e4f latest | 2026-10-31 | 7e95e4f | 11,021 B | A | view · diff |
| git:20261025.122bc9d | 2026-10-25 | 122bc9d | 10,755 B | A | view · diff |
| git:20261025.6531d71 | 2026-10-25 | 6531d71 | 10,611 B | A | view · diff |
| git:20261024.a308a4e | 2026-10-24 | a308a4e | 10,446 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11021 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
k8s-servant/k8s-skills · 35 stars · license Apache-2.0 · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_obs6ulscl4efw7wo GET https://markdownregistry.com/api/v1/resolve?ref=k8s-servant/k8s-skills/k8s-network-troubleshooting GET https://markdownregistry.com/api/v1/blob/c70ad88cf0b61fa0b38f5ef510f105446b90b20406ce200b35547f9c5019cc5c
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.