deployment – Page 16 – Türker Yıldırım

An index template applied after the index does nothing

NoteOctober 31, 20221 min read

A template is consulted at index creation and never again, so changing it does not affect an index that already exists. Mappings are immutable for existing fields, which…

Two teams, one database, and the schema change that needed a meeting

Deep diveOctober 29, 202210 min read

A shared schema, and a rename that took three weeks to coordinate. Table ownership that exists in nobody’s head.

workflow_dispatch inputs, for the deploy you run by hand

NoteOctober 26, 20222 min read

A manually triggered workflow with typed inputs replaces a shell script that lives on one person’s laptop. Defaulting the destructive flag to the safe value is the detail…

docker compose config resolves everything, which is the point

NoteOctober 25, 20222 min read

A stack assembled from three override files and a set of environment variables is not readable by looking at any of them. Running it with –quiet as a…

Four kinds of flag, with four different lifetimes

NoteOctober 19, 20222 min read

Treating every flag the same is why they accumulate, because a release toggle and a kill switch have nothing in common except the mechanism. Permission checks disguised as…

A monorepo for four packages and one application

Deep diveOctober 5, 202210 min read

Four packages, four repositories, and a change that spans three. A version bump dance that takes an afternoon.

The database that was 80% dead rows

Deep diveOctober 4, 202210 min read

180 GB on disk and 41 GB of data. A table that was deleted from daily and never shrank.

The API version that was never going to be removed

Deep diveSeptember 21, 202215 min read

v1, v2 and v3 in production, and v1 has four clients. Every change is made three times.

OpenTelemetry when the PHP SDK is still beta

Deep diveSeptember 20, 202210 min read

The traces specification is 1.0 and the PHP implementation is not. Three tracing formats and a vendor decision nobody wants to make.

The scale-down that kills a job mid-flight

NoteSeptember 15, 20222 min read

An autoscaler removing a worker sends a termination signal, and a worker that does not handle it loses whatever it was doing. Scaling down is the case nobody…