ceph-troubleshooting skillA
ceph-troubleshooting is agent-read markdown (skill) from air-gapped/skills: 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 Ten.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# ceph-troubleshooting Defaults below were read from `src/common/options/*.yaml.in` at v18.2.8, v19.2.6 and v20.2.4 on **2026-09-23**; procedures from docs.ceph.com and Rook docs at v1.20.7. 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@git:20260923.3c68991mdr add air-gapped/skills/ceph-troubleshooting@sha256:ac40e4cc3fffffb5Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_fs5bf4kyknlvnc2j)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260923.3c68991 latest | 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 (9625 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 · 5 stars · license MIT · pushed 2026-09-23 · 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/ac40e4cc3fffffb53b22da008cc3b610bacff2bb146752054e8c3f82eaff9a88
Your agent 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.