Hosting Operations

Build a Deploy and Restart Timeline

You need to compare deploy activity, restarts, and rollbacks against application errors.

Command

grep -Eh 'deploy|release|restart|started|stopped|rolled back' fixtures/incidents/*.log | sort

What changed

Nothing changes. The command prints matching event lines in timestamp order.

Danger

safe

When to use it

Use when an incident may correlate with a release switch, restart, or rollback.

When not to use it

Do not use it as proof that deploy caused the incident; use it to focus the next investigation step.

Undo or recovery

No undo needed because the command is read-only.

Expected output

Timestamped deploy, release, restart, and rollback lines.

demo script

Disposable terminal steps

ls fixtures/incidents/*.log
grep -Eh 'deploy|release|restart|started|stopped|rolled back' fixtures/incidents/*.log | sort

Terminal transcript Demo JSON

simulated output

What it looks like

disposable vessel

::fixture-ready::
$ ls fixtures/incidents/*.log
fixtures/incidents/app.log
fixtures/incidents/deploy.log
::exit-code::0
$ grep -Eh 'deploy|release|restart|started|stopped|rolled back' fixtures/incidents/*.log | sort
2026-06-25T13:58:00Z deploy started release=2026.06.25.2 actor=ci
2026-06-25T14:00:01Z level=INFO service=api request_id=req-100 msg=started release=2026.06.25.1
2026-06-25T14:04:44Z deploy release_switch release=2026.06.25.2
2026-06-25T14:04:44Z level=INFO service=deploy request_id=req-104 msg=release_switch release=2026.06.25.2
2026-06-25T14:05:12Z level=INFO service=system request_id=req-106 msg=worker_restarted
2026-06-25T14:05:12Z supervisor worker restarted after exit_code=137
2026-06-25T14:09:30Z deploy rolled back release=2026.06.25.1 reason=error_rate
::exit-code::0

YouTube Short

Mark deploys and restarts.

During incidents, deploys and restarts are landmarks. Pull them into one timeline before blaming the app.

experiments

A/B tests to run

Metric: short_click_through_rate

A: Deploys are timeline landmarks.

B: Put restarts next to errors.