deployment – Page 17 – Türker Yıldırım

Composer 2.4 and the platform-check you disabled in 2020

NoteAugust 18, 20222 min read

Composer generates a platform_check.php that aborts at autoload time when the running PHP does not satisfy the constraint, and plenty of projects switched it off during the 2.0…

Composer audit, and the advisory that was already fixed

Deep diveAugust 8, 202210 min read

2.4 in August, and an audit command in the tool that already knows. A separate scanner reporting on a lock file it half understood.

An admin panel that was a security boundary

Deep diveAugust 2, 202210 min read

/admin on the same hostname, behind a login form. A support engineer with the same session cookie as a customer.

Sessions in Redis, and the logout that did not

Deep diveJune 29, 202210 min read

A session store move that changed the security properties. Logging out on one device leaves the others signed in.

Restoring one table is faster than restoring the database

NoteJune 14, 20222 min read

A full restore of a 180 GB database to fix one table is hours of downtime for a problem affecting forty thousand rows. The transportable tablespace route is…

The deploy that needed a database restore

Deep diveJune 7, 202215 min read

A migration that wrote bad data to 41,000 rows. Rollback restores the code and not the rows.

An error budget spent deliberately is the point of having one

NoteMay 31, 20222 min read

A budget that is never spent means the objective is too low, and a budget that is exhausted every month means it is too high or the system…

Applying a saved plan, so the review means something

NoteMay 31, 20221 min read

Re-planning at apply time means the thing that runs is not the thing that was reviewed, which defeats the review entirely. A saved plan is tied to a…

A feature flag needs an expiry date at creation

NoteMay 19, 20222 min read

Creating a flag is a deliberate act and removing one is not, so without a mechanism the count only goes up. A failing test is the only mechanism…

An SLO that survived contact with the business

Deep diveMay 17, 202214 min read

99.9% was written in a document in 2020 and had never been measured. Three teams with three definitions of “up”.