ceph-troubleshooting SKILL.md skillA
ceph-troubleshooting from air-gapped/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add air-gapped/skills/ceph-troubleshooting@git:20261027.0ad34ccPins git:20261027.0ad34cc in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- air-gapped/skills
- Path
.claude/skills/ceph-troubleshooting/SKILL.md- Versions recorded
- 10
- Latest version
- git:20261027.0ad34cc, committed Oct 27, 2026
- First version recorded
- Sep 22, 2026
- Size
- 11,340 bytes
- Repository stars
- 6
- License
- MIT
Diagnose and recover an unhealthy Ceph cluster, with Rook-on-Kubernetes specifics: slow or stuck recovery/backfill under the mClock scheduler (why osd_max_backfills "does nothing"), nearfull/backfillfull/full, inconsistent/unfound/incomplete/down PGs, BLUESTORE_SLOW_OP_ALERT vs SLOW_OPS, OSD OOM kills from pod memory sizing, mon quorum loss and restore-quorum, OSD removal with the kubectl-rook-ceph plugin, stale RBD watchers after node loss, and field-reported failure modes on Squid 19.2 and…
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
# ceph-troubleshooting Defaults below are from `src/common/options/*.yaml.in` at v18.2.8, v19.2.7 and v20.2.4; procedures from docs.ceph.com and Rook docs at v1.21.1. On a live cluster, `ceph config show osd.N <opt>` beats any default written here. ## First moves 1. `ceph health detail` — work from the codes, not from `ceph status`. 2. Under Rook, run Ceph commands through the toolbox or `kubectl rook-ceph ceph <args>` (plugin v0.9.6, 2026-03-31). If the toolbox fails with `handle_auth_bad_method` / errno 13 right after a Ceph upgrade, it is a key rotation, not an outage — see rook-ceph-best-practices. 3. `AUTH_INSECURE_*` codes on 19.2.6+ / 20.2.4+ belong to the CVE-2025-30156 rotation (rook-ceph-best-practices), not to this skill. ## Recovery and backfill are slow — mClock `osd_op_queue` defaults to `mclock_scheduler` on Quincy through Tentacle. Under mClock, `osd_max_backfills` and `osd_recovery_max_active*` are **locked**: `ceph config set` reports success and the value is reverted to the profile's built-in. This is the usual "raised backfills, nothing changed" report. | Goal | Do | |---|---| …
Read the whole file at its exact version.
How to install
mdr add air-gapped/skills/ceph-troubleshooting@sha256:33a4a48136ebcd93The line at the top of this page pins the label git:20261027.0ad34cc, 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_fs5bf4kyknlvnc2j)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 10 versions of this file, between Sep 22, 2026 and Oct 27, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261027.0ad34cc latest | 2026-10-27 | 0ad34cc | 11,340 B | A | view · diff |
| git:20261027.24c83ec | 2026-10-27 | 24c83ec | 10,935 B | A | view · diff |
| git:20261027.a8619fc | 2026-10-27 | a8619fc | 11,364 B | A | view · diff |
| git:20261027.d5afb4c | 2026-10-27 | d5afb4c | 11,188 B | A | view · diff |
| git:20261027.e27de34 | 2026-10-27 | e27de34 | 10,868 B | A | view · diff |
| git:20260923.3c68991 | 2026-09-23 | 3c68991 | 9,625 B | A | view · diff |
| git:20260922.baa3eec | 2026-09-22 | baa3eec | 9,502 B | A | view · diff |
| git:20260922.e0e74e7 | 2026-09-22 | e0e74e7 | 9,447 B | A | view · diff |
| git:20260922.24e2c6d | 2026-09-22 | 24e2c6d | 9,316 B | A | view · diff |
| git:20260922.3ec9967 | 2026-09-22 | 3ec9967 | 9,755 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 (11340 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
air-gapped/skills · 6 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fs5bf4kyknlvnc2j GET https://markdownregistry.com/api/v1/resolve?ref=air-gapped/skills/ceph-troubleshooting GET https://markdownregistry.com/api/v1/blob/33a4a48136ebcd93a62367e8c64360e3cd91ca0e7fb3d577a1f673a61a51aac0
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.