The DevOps section collects hands-on experience from the Sudo infrastructure team running hundreds of PHP/Laravel websites: the three-tier Cloud VPS model, the move to Kubernetes and CI/CD, real incidents and how they ...
Some incidents leave operators puzzled: the balancer returns 502/504 in waves, traffic is close to zero, and yet the PHP-FPM pool is always full of busy workers. That is a PHP-FPM hang caused by waiti...
In a multi-tier Cloud VPS setup, the balancer is often the smallest machine but carries the largest responsibility: every website passes through it. When RAM runs out, the kernel triggers the OOM kill...
A common situation with Laravel: several queue workers run jobs that rebuild a statistics table, each job handles a different group of data, and once in a while a job fails with error 1213. That is a...
With PHP-FPM, every request to a Laravel site starts from zero: load the autoloader, read the config, register dozens of service providers, and only then reach the code that does the real work. When t...
When you run hundreds of websites, the three riskiest operations are usually not incidents but routine requests: deploying a new site, changing the domain of a live site, and moving a site to a differ...
Before a website goes live on its real domain, it usually has a demo version where the site owner reviews the design, QA runs tests, and performance is measured. The demo runs on a subdomain such as *...
Replacing an old monitoring stack with kube-prometheus-stack usually looks very smooth: the install command reports Install complete, Prometheus comes up, Grafana is reachable, every pod is Running. B...
A small operations team cannot sit and watch dozens of Cloud VPS instances all day. Nginx or PHP-FPM dies at midnight, a queue worker falls into the FATAL state, a disk slowly fills up: these incident...
As described in the opening article of this series, MySQL servers on small Cloud VPS instances usually run without binlog and without replicas. In that setup, the safety of all your data rests on exac...
It is not a rare situation for Kubernetes operations teams: the admin kubeconfig of a production cluster slips into the Helm repo, sits there across many commits, and then one day someone notices it a...
Once a cluster has dozens of Cloud VPS instances, the volume of repetitive daily operations is large: creating sites, deploying code, changing domains, running backups, removing sites, running an arti...
Building a new Kubernetes cluster for a microservice project can take several weeks if you do every step by hand, or only about half a day if every component has been standardized in advance. The diff...
All articles are displayed
