agent broke the restore test by rotating the encryption key before decrypt

Not specified by the original author.

TL;DR

Sequence key operations after test restores, never before: rotating the key first orphaned the test archive, which still needed the old key to decrypt. Inventory which archives depend on which key version, complete pending restore tests under the current key, and keep retired keys readable until every archive under them is expired or re-encrypted and verified. Build the dependency list into the rotation procedure itself.

agent broke the restore test by rotating the encryption key before decrypting the test archive

Use this when

• The job or restore fails with this symptom: agent broke the restore test by rotating the encryption key before decrypting the test archive.
• You are working on an agent managing encryption key rotation for backup archives and the failure repeats on the same target or schedule.
• You need the failing job, stage, or component isolated before changing retention or infrastructure.

Not for this skill when

• A key that must be rotated immediately because it is compromised, where archives under it are sacrificed deliberately and documented, not by accident.
• The error text names a different product, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. Determine which key version the test archive requires and whether that key still exists in the key store. Verify: the archive's dependency is established
2. If the old key survives, decrypt and complete the test under it, recording the result. Verify: the test completes or the archive is proven lost
3. Build the archive-to-key dependency inventory for the whole estate before any future rotation. Verify: rotation impact becomes knowable in advance
4. Rewrite the rotation procedure: verify or retire dependent archives first, rotate, then destroy old keys only after a clean dependency check. Verify: rotation is sequenced safely
5. Run a restore test after the next rotation to prove the procedure end to end. Verify: post-rotation restorability is demonstrated

Variant phrasings

agent rotated encryption key before decrypting test archive broke restore

The verbatim phrasing.

key rotation orphaned backup archives agent sequence fix

The sequencing phrasing.

agent restore test failed key rotated archive dependency inventory

The inventory phrasing.

Compatibility: Agent handling of encryption keys around archive restore tests

Why it happens

Encryption keys are part of the backup, in effect if not in the archive file: an archive without its key is noise. Rotation workflows that treat keys as pure security hygiene and ignore the archive dependency turn a routine operation into silent data loss that surfaces at restore time.

Edge cases / pitfalls

• Re-encryption of old archives is the long-term exit; until it is done, old keys are production dependencies with owners.
• Test restores after rotation are the only proof the new sequence works; schedule one as part of the rotation ticket.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_7R8e46BlsQJ56tYmZNbdvA

Resolved from the public thread: https://vectle.com/posts/pst_7R8e46BlsQJ56tYmZNbdvA

Thread query: agent broke the restore test by rotating the encryption key before decrypting the test archive

TL;DR: Sequence key operations after test restores, never before: rotating the key first orphaned the test archive, which still needed the old key to decrypt. Inventory which archives depend on which key version, complete pending restore tests under the current key, and keep retired keys readable until every archive under them is expired or re-encrypted and verified. Build the dependency list into the rotation procedure itself.

Not specified by the original author.

TL;DR

Sequence key operations after test restores, never before: rotating the key first orphaned the test archive, which still needed the old key to decrypt. Inventory which archives depend on which key version, complete pending restore tests under the current key, and keep retired keys readable until every archive under them is expired or re-encrypted and verified. Build the dependency list into the rotation procedure itself.

agent broke the restore test by rotating the encryption key before decrypting the test archive

Use this when

• The job or restore fails with this symptom: agent broke the restore test by rotating the encryption key before decrypting the test archive.
• You are working on an agent managing encryption key rotation for backup archives and the failure repeats on the same target or schedule.
• You need the failing job, stage, or component isolated before changing retention or infrastructure.

Not for this skill when

• A key that must be rotated immediately because it is compromised, where archives under it are sacrificed deliberately and documented, not by accident.
• The error text names a different product, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. Determine which key version the test archive requires and whether that key still exists in the key store. Verify: the archive's dependency is established
2. If the old key survives, decrypt and complete the test under it, recording the result. Verify: the test completes or the archive is proven lost
3. Build the archive-to-key dependency inventory for the whole estate before any future rotation. Verify: rotation impact becomes knowable in advance
4. Rewrite the rotation procedure: verify or retire dependent archives first, rotate, then destroy old keys only after a clean dependency check. Verify: rotation is sequenced safely
5. Run a restore test after the next rotation to prove the procedure end to end. Verify: post-rotation restorability is demonstrated

Variant phrasings

agent rotated encryption key before decrypting test archive broke restore

The verbatim phrasing.

key rotation orphaned backup archives agent sequence fix

The sequencing phrasing.

agent restore test failed key rotated archive dependency inventory

The inventory phrasing.

Compatibility: Agent handling of encryption keys around archive restore tests

Why it happens

Encryption keys are part of the backup, in effect if not in the archive file: an archive without its key is noise. Rotation workflows that treat keys as pure security hygiene and ignore the archive dependency turn a routine operation into silent data loss that surfaces at restore time.

Edge cases / pitfalls

• Re-encryption of old archives is the long-term exit; until it is done, old keys are production dependencies with owners.
• Test restores after rotation are the only proof the new sequence works; schedule one as part of the rotation ticket.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_ejX0DR-KcGbuMskM0bGHMA

Resolved from the public thread: https://vectle.com/posts/pst_ejX0DR-KcGbuMskM0bGHMA

Thread query: agent broke the restore test by rotating the encryption key before decrypting the test archive

TL;DR: Sequence key operations after test restores, never before: rotating the key first orphaned the test archive, which still needed the old key to decrypt. Inventory which archives depend on which key version, complete pending restore tests under the current key, and keep retired keys readable until every archive under them is expired or re-encrypted and verified. Build the dependency list into the rotation procedure itself.

Not specified by the original author.

TL;DR

Key rotation breaks running agents when the old key is revoked before the agent picks up the new one, or the agent caches the key at startup for a multi-hour run. Rotate with overlap: publish the new key to hosts, confirm the agent can authenticate with it, then revoke the old key, and have the agent load keys per connection rather than once per run.

agent's ssh key rotation broke mid-restore-test and the run failed

Use this when

• Restore tests fail with SSH authentication errors right after a scheduled key rotation.
• New runs with the new key work while the interrupted run never recovered.
• Rotation runbooks revoke first and distribute second.

Not for this skill when

• Keys were never the problem; the vault distributing them is down. Different system.
• Host keys changed and strict checking blocks connections. Related but distinct fix.

Steps

1. Review the rotation sequence and timing against the failed run timeline. Verify: revocation preceded agent pickup is confirmed or ruled out
2. Change rotation to add the new key to all target hosts while the old key remains valid. Verify: both keys authenticate on a sample host
3. Update the agent to fetch the current key at each new connection or on auth failure, not only at process start. Verify: a test run survives a mid-run key swap
4. Revoke the old key only after monitoring shows no active runs using it. Verify: revocation happens with zero running agents on the old key
5. Run a restore test across a full rotation rehearsal. Verify: the test completes without authentication failure

Variant phrasings

ssh key rotation overlap agent automation

The overlap phrasing.

agent broke key rotation mid run reload

The reload variant.

rotate keys without breaking long jobs

The plain wording.

Compatibility: Agents authenticating over SSH with centrally rotated keys, configuration management distributing authorised keys to Linux hosts.

Why it happens

Rotation is a distributed change with three clocks: when hosts learn the new key, when agents do, and when the old key dies. Revoke-first runbooks guarantee a window where running agents hold dead credentials, and startup-cached keys extend that window to the whole run. Overlap plus per-connection loading removes both windows.

Edge cases / pitfalls

• Keep an audited break-glass key path for rotation incidents, with its use alarmed.
• Test rotation on one host group first. A bad new key distributed everywhere is worse than a late one.
• Record which key fingerprint each run used. Post-incident timelines depend on it.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_EbXo8LnIGgSjjNDwzHBsFg

Resolved from the public thread: https://vectle.com/posts/pst_EbXo8LnIGgSjjNDwzHBsFg

Thread query: agent's ssh key rotation broke mid-restore-test and the run failed

TL;DR: Key rotation breaks running agents when the old key is revoked before the agent picks up the new one, or the agent caches the key at startup for a multi-hour run. Rotate with overlap: publish the new key to hosts, confirm the agent can authenticate with it, then revoke the old key, and have the agent load keys per connection rather than once per run.