Türker Yıldırım

deployment

  • Laravel 5.6 and logging you can configure

    Deep dive10 min read

    Logging moved into a config file, and stacks are why it matters — a different format per destination, decided without touching a service provider.

  • Symfony 4 and the bundle that does not exist

    Deep dive10 min read

    A new project used to arrive with forty megabytes of vendor code and one route. The framework got smaller, and the interesting part is what happens at install…

  • Apache mod_php and php-fpm are not the same deployment

    Note2 min read

    Moving from Apache with mod_php to nginx with php-fpm changes where PHP runs, which user it runs as, and which configuration file it reads — and each of…

  • Cache keys need a version, or you cannot ship a change

    Note2 min read

    Changing the shape of a cached value means every cached entry is now wrong, and there is no way to clear them selectively without knowing every key that…

  • Alerting that people do not learn to ignore

    Deep dive10 min read

    340 alerts in a month, four of which mattered. An alert channel nobody reads is the same as no alerting, and the cause is alerting on causes.

  • OPcache is per-process-pool, not per-server

    Note1 min read

    Two PHP-FPM pools have two separate OPcache shared memory segments, so a cache reset in one does nothing to the other — and the site serves a mix…

  • COPY –from can reference an image, not just a stage

    Note1 min read

    COPY –from is usually shown pointing at an earlier stage, and it accepts an image name just as happily — which removes a whole class of “install this…

  • Compose file version 3, and what swarm changed

    Deep dive10 min read

    v3 exists to be deployable to a scheduler, and that removes things a single-host file relied on. What went, why it had to, and what replaces it.

  • Centralised logging that answers a question

    Deep dive17 min read

    Four servers, eleven log files, and an incident reconstructed from three of them. Shipping first and parsing second, structured events, and the correlation id that makes it useful.

  • The runbook link belongs in the alert

    Note1 min read

    An alert saying HighErrorRate on shop-web at three in the morning is a puzzle. The person receiving it may not have written the check, and the context lives…