k8s-envoy-troubleshooting SKILL.md skillA
k8s-envoy-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-envoy-troubleshooting@git:20261025.2ed8c84Pins git:20261025.2ed8c84 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-envoy-troubleshooting/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261025.2ed8c84, committed Oct 25, 2026
- Size
- 10,488 bytes
- Repository stars
- 35
- License
- Apache-2.0
Use when an Envoy proxy on Kubernetes fails requests: clients get 503 "no healthy upstream", 503 "upstream connect error or disconnect/reset before headers. reset reason: remote connection failure", 404 with an empty body, or 504 "upstream request timeout", access logs show response flags (UH, UF, NR, NC, UT, UO, URX, UC), or Envoy crashes at start ("has unknown fields", "no such field", "route: unknown cluster"). Covers Envoy run directly (a Deployment with its own bootstrap, a front proxy, a…
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
# Envoy troubleshooting Find out why Envoy does not pass a request on, 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. Envoy takes a request on a **listener**, matches a **route** by the Host header (`domains`) and the path, and sends it to a **cluster**, whose **hosts** come from DNS (`STRICT_DNS`, `LOGICAL_DNS`), a static list or a control plane (EDS). When it cannot, it answers itself and records why: in the access log as a **response flag** (`UH`, `UF`, `NR` ...) and `%RESPONSE_CODE_DETAILS%`, and in its stats. A standalone Envoy reads its bootstrap once at start, so a config error stops it and an edited ConfigMap needs a restart. The commands use placeholders: `my-namespace`, `my-envoy` (the Envoy workload and its ConfigMap), `my-envoy-admin` (a Service in front of the admin port, if there is one), `my-app` (the backend) and `my-web` (a client). Replace them with the real names. Never …
Read the whole file at its exact version.
How to install
mdr add k8s-servant/k8s-skills/k8s-envoy-troubleshooting@sha256:dffc599fde4008daThe line at the top of this page pins the label git:20261025.2ed8c84, 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_jfrwzayffdrttvsg)
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Versions
The registry has recorded 1 version of this file, committed on Oct 25, 2026.
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 (10488 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_jfrwzayffdrttvsg GET https://markdownregistry.com/api/v1/resolve?ref=k8s-servant/k8s-skills/k8s-envoy-troubleshooting GET https://markdownregistry.com/api/v1/blob/dffc599fde4008da705dbbd8b0d2a300a627517ab7ca52b59c05d6c268c1e31d
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.