kubernetes-pod

Restart pods when configmap updates in Kubernetes?

The current best solution to this problem (referenced deep in https://github.com/kubernetes/kubernetes/issues/22368 linked in the sibling answer) is to use Deployments, and consider your ConfigMaps to be immutable. When you want to change your config, create a new ConfigMap with the changes you want to make, and point your deployment at the new ConfigMap. If the … Read more

Why container memory usage is doubled in cAdvisor metrics?

That’s because cAdvisor takes these values from cgroups. The structure of cgroups looks like a tree, where there are branches for each pod, and every pod has child cgroups for each container in it. This is how it looks (systemd-cgls): ├─kubepods │ ├─podb0c98680-4c6d-4788-95ef-0ea8b43121d4 │ │ ├─799e2d3f0afe0e43d8657a245fe1e97edfdcdd00a10f8a57277d310a7ecf4364 │ │ │ └─5479 /bin/node_exporter –path.rootfs=/host –web.listen-address=0.0.0.0:9100 │ │ … Read more