The Kubernetes in Production series collects the problems Sudo's infrastructure team ran into while moving Laravel websites onto Kubernetes: storage with PVCs and NFS, MySQL, MongoDB and Elasticsearch inside the cluster, ...
On Kubernetes, MySQL out of connections rarely shows up under its real name. You see pods stuck in Terminating or PodInitializing, liveness probes failing, users getting 502, and all eyes turn to the...
A Laravel website runs on several pods, and to let the pods share one directory, that directory is mounted from an NFS server. Everything works well until the site starts hanging in waves: the pods ar...
The CI/CD pipeline is green, but the website is still running old code. At another time, the site hangs completely while MySQL and Redis are perfectly healthy. These two symptoms look very different,...
A single line, targetCPUUtilizationPercentage: 90 in values.yaml, is enough to give a Laravel website an HPA (HorizontalPodAutoscaler) that adds pods when load grows. But once you enable HPA and run a...
A platform that creates demo websites on demand, with one subdomain per site under the same root domain, will soon hit this error: a Certificate stuck at Ready=False and a line in describe that reads...
A MongoDB instance without authentication can have all its data wiped, and when you move a Laravel website that uses MongoDB onto Kubernetes you usually hit two more errors in a row. The first is The...
A Laravel website had just started running against a MySQL 8 pod in Kubernetes when pages slowed down and then hung. The application log showed error 1114: The table '/tmp/#sql...' is full, even thoug...
If your cluster has Prometheus and Grafana but no per-pod alert rules, you usually learn that a pod is running out of RAM only when the site already returns 503. This guide closes that gap in three st...
A site returns 503 from ingress-nginx, yet kubectl get pod still shows Running, and CPU and RAM on Grafana are both low. The common reflex is to suspect that the pod ran out of memory and was killed....
A Laravel pod runs nginx, PHP-FPM, cron and a queue worker in a single container. Even when nobody visits the site, kubectl top pod still shows a noticeable baseline of RAM and CPU. Then comes load te...
A Laravel site's image already contains the code, themes, plugins and assets. But when you attach a volume mount to the exact directory that holds them, to keep uploaded files, the pod starts and then...
Running a single-node Elasticsearch in Docker takes one docker run command. Move the same setup to Kubernetes and things start to drift: the pod sits in Pending, FailedMount events appear and vanish,...
A pod runs as the nginx user (not root), mounts an NFS directory, and every subdirectory is owned by root. The chown command in postStart changes nothing, and the cache reports permission denied. An e...
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