architecture – Page 43 – Türker Yıldırım

Kubernetes is not the answer to this question

Deep diveSeptember 16, 201915 min read

The question was how to deploy four services, and the answer arrived before it. Naming what you actually need — scheduling, health, rolling deploys, secrets.

A WooCommerce order status is a post status, and that constrains it

NoteSeptember 11, 20192 min read

Order statuses are registered post statuses prefixed with wc-, which means a custom one is a core registration and the twenty-character post status limit applies. Both steps are…

Deploy on push, on a platform you do not control

Deep diveAugust 16, 201910 min read

The same deployment problem, a second time, on a different platform. A push notification is not authentication, and HTTP has a timeout.

An aggregate is whatever must be consistent in one transaction

NoteAugust 10, 20192 min read

The aggregate boundary is not a modelling preference — it is the answer to which invariants have to hold at every instant, and everything else can be eventually…

The default shard count is one now, and it was five

NoteAugust 5, 20191 min read

7.0 changed the default primary shard count from five to one, which is a considerable behavioural change hidden in a release note. The old default was widely agreed…

Idempotency keys, and where the response has to be stored

NoteJuly 31, 20192 min read

A client that times out and retries has sent the same request twice, and the server cannot tell whether the first one succeeded — which is what the…

The queue worker that leaked, and the memory limit that hid it

Deep diveJuly 15, 201910 min read

A worker restarting every eleven minutes, reported as healthy. Finding the leak is not the same as bounding it, and the seatbelt hides the next one.

Rootless containers and the build that stopped needing a daemon

Deep diveJuly 4, 20199 min read

19.03 made BuildKit the default and rootless mode possible. A CI runner where building an image means root on the host is the problem worth naming.

Messenger, and the queue that is part of the framework

Deep diveJune 25, 201910 min read

4.3 made Messenger stable, and dispatch stopped being the same decision as transport. A message, a handler, and routing declared in configuration.

Lazy collections and the report that would not fit in memory

Deep diveJune 24, 201910 min read

A memory limit hit on the fourth of the month, every month. A collection is an array, and an array is all of it at once — until…