recovery

A set of procedures for saving and restoring the data stored by etcd, a service that keeps shared cluster state.

In plain words
What is it for?
Use it to create snapshots, check snapshot status, compare revisions, and rebuild an etcd cluster from a snapshot.
Why use it?
It provides a recovery path when an etcd cluster loses too many members to reach agreement, which is called losing quorum.

Command for Claude Code

Install

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.

agentmods
npx agentmods add commands/openshift-eng/two-node-toolbox/recovery
Clone the repo
git clone --depth 1 https://github.com/openshift-eng/two-node-toolbox

Made for: Claude Code.

Per session 8 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,015 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00008 $0.02015
Opus 5 $0.00004 $0.01007
Sonnet 5 $0.00002 $0.00403
Haiku 4.5 $0.00001 $0.00201

Measured 2d ago against content hash f3cfa14cbc83, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

recovery scanned grade A with 0 findings 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 2d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/commands/etcd/etcd-ops-guide/recovery.md · 149 lines

How it starts

The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.

etcd is designed to withstand machine failures. An etcd cluster automatically recovers from temporary failures (e.g., machine reboots) and tolerates up to (N-1)/2 permanent failures for a cluster of N members. When a member permanently fails, whether due to hardware failure or disk corruption, it loses access to the cluster. If the cluster permanently loses more than (N-1)/2 members then it disastrously fails, irrevocably losing quorum. Once quorum is lost, the cluster cannot reach consensus and therefore cannot continue accepting updates.

To recover from disastrous failure, etcd v3 provides snapshot and restore facilities to recreate the cluster without v3 key data loss. To recover v2 keys, refer to the v2 admin guide.

Snapshotting the keyspace

Recovering a cluster first needs a snapshot of the keyspace from an etcd member. A snapshot may either be taken from a live member with the etcdctl snapshot save command or by copying the member/snap/db file from an etcd data directory. For example, the following command snapshots the keyspace served by $ENDPOINT to the file snapshot.db:

$ ETCDCTL_API=3 etcdctl --endpoints $ENDPOINT snapshot save snapshot.db

Note that taking the snapshot from the member/snap/db file might lose data that has not been written yet, but is included in the wal (write-ahead-log) folder.

Status of a snapshot

To understand which revision and hash a given snapshot contains, you can use the etcdutl snapshot status command:

$ etcdutl snapshot status snapshot.db -w table
+---------+----------+------------+------------+
|  HASH   | REVISION | TOTAL KEYS | TOTAL SIZE |
+---------+----------+------------+------------+
| 7ef846e |   485261 |      11642 |      94 MB |
+---------+----------+------------+------------+

Restoring a cluster

Revision Difference

When you are restoring a cluster, existing clients may perceive the revision going back by many hundreds or thousands. This is due to the fact that a given snapshot only contains the data lineage up until the point of when it was taken, whereas the current state might already be further ahead.

Read the full file on GitHub · 149 lines

Changes

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.

  1. 2d ago First seen · 149 lines · 8 tokens per session scan A f3cfa14cbc83

Subscribe to this mod's changes

recovery is a command published in the GitHub repository openshift-eng/two-node-toolbox (5 stars, last pushed 28d ago), licensed Apache-2.0. It adds 8 tokens to every session and 2,015 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.