Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tech:notes_kubernetes_k8s_-_diag [2025/09/12 14:15] – Jean-Baptiste
+++ tech:notes_kubernetes_k8s_-_diag [2026/06/07 19:12] (Version actuelle) – modification externe 127.0.0.1
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>Brouillon K8S}}
+# Notes Kubernetes k8s - Diag
+Voir :
+* [[Notes VIO VMware Integrated OpenStack k8s]]
+* [[Notes Kubernetes k8s - Utilisation]]
+~~~bash
+sudo journalctl -f -u kubelet.service
+sudo journalctl -u containerd
+~~~
+~~~bash
+kubectl cluster-info
+kubectl get componentstatus
+kubectl get ds -n kube-system
+kubectl get deploy -n kube-system
+kubectl get nodes
+kubectl get pods --field-selector status.phase!=Running -A
+kubectl events --types=Warning -A -w
+kubectl get events --all-namespaces  --sort-by='.metadata.creationTimestamp'
+~~~
+Autre
+  * Use kubectl describe pod ... to find the node running your Pod and the container ID (docker://...)
+  * SSH into the node
+  * Run docker exec -it -u root CONTAINER_ID /bin/bash
+Si Metrics-server est installé
+~~~bash
+kubectl top node
+kubectl top pod --sort-by=memory -A
+~~~
+~~~
+        - 'systemctl status kubelet'
+        - 'journalctl -xeu kubelet'
+Additionally, a control plane component may have crashed or exited when started by the container runtime.
+To troubleshoot, list all containers using your preferred container runtimes CLI.
+Here is one example how you may list all running Kubernetes containers by using crictl:
+        - 'crictl --runtime-endpoint unix:///var/run/containerd/containerd.sock ps -a | grep kube | grep -v pause'
+        Once you have found the failing container, you can inspect its logs with:
+        - 'crictl --runtime-endpoint unix:///var/run/containerd/containerd.sock logs CONTAINERID'
+error execution phase wait-control-plane: could not initialize a Kubernetes cluster
+To see the stack trace of this error execute with --v=5 or higher
+~~~
+Ulimits / Process ID limits and reservations
+~~~bash
+watch 'ps -e -w -o "thcount,cgname" --no-headers | awk "{a[\$2] += \$1} END{for (i in a) print a[i], i}" | sort --numeric-sort --reverse | head --lines=8'
+~~~
+FIXME