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, ...
A Laravel pod starts normally, but as soon as it writes a log, a cache entry or an uploaded image, a permission denied error appears: Failed to open stream: Permission denied on storage/framework/cach...
A Laravel website running on Kubernetes starts returning 503 over and over. The pods are still Running and are not restarting, but the event Readiness probe failed ... context deadline exceeded keeps...
You install mysqld_exporter with Helm and the pod reports 1/1 Running, but Prometheus either shows no target, or shows a green target while the graphs stay empty. None of the three errors below prints...
The application reports SQLSTATE[HY000] [2002] Connection refused while the MySQL Service still has an address and answers ping, and the pod's CPU and RAM are completely normal. This is the typical sh...
When a dev team needs to read logs, enter pods or edit a ConfigMap on their own, the fastest way is to hand them the admin kubeconfig. It is also the most dangerous way: that file opens every namespac...
A typical situation: a Laravel site runs on the cluster, an admin imports an XML file of about 45 MB and gets a 413 error, Request Entity Too Large. You change client_max_body_size in the pod's nginx,...
Running artisan on Kubernetes is very different from running it on a VPS: there is no long-lived machine to SSH into, no operating-system crontab, and every process has to belong to an object with a c...
The MySQL replication sample built on a StatefulSet in the Kubernetes documentation is the easiest way to see a stateful database running on a cluster: one primary pod, replica pods, and a sidecar tha...
A MySQL pod on LKE sits in the ContainerCreating state after you delete the pod or change nodes. There is no application log because the container never ran, and kubectl get pod only shows ContainerCr...
A single Laravel pod cannot handle heavy traffic, so you raise replicas to 2. The first pod runs, the second one is stuck at Init:0/1 and reports Multi-Attach. The cause is almost always the same: bot...
One failure mode is especially annoying when you move Laravel to Kubernetes: the ConfigMap is correct, the pod has restarted, and the application still runs with the old value. Or a page works on the...
Installing cert-manager on Kubernetes usually takes only a few commands, but when it goes wrong the messages are hard to read. This guide is a troubleshooting handbook for cert-manager installation er...
All articles are displayed
