Kubernetes:

Containerd

Kill all containerd tasks

for task in $(sudo ctr -n k8s.io task ls | awk '{print $2}' | sed 1d); do sudo kill -9 $task; done

Delete all containerd containers

sudo ctr -n k8s.io c rm $(sudo ctr -n k8s.io c ls -q)

Delete all containerd images:

sudo ctr -n k8s.io i rm $(sudo ctr -n k8s.io i ls -q)

Kubectl

Copy secret from one namespace to another

kubectl get secret {source_secret} --namespace={source_namespace} -o yaml | sed 's/namespace: .*namespace: {target_namespace}' | kubectl apply -f -
````
###### List pods by label on current node
```shell
kubectl get pods -n {namespace} -o wide --field-selector spec.nodeName$(hostname) -l {label_key}={label_value}

Schedule Daemonset on specific node

# Apply:
kubectl -n {namespace} patch ds {daemonset_name} -p '{"spec": {"template" {"spec": {"nodeSelector": {"kubernetes.io/hostname": "YOUR_NODE_HOSTNAME"}}}}}'

# Remove:
kubectl -n {namespace} patch ds {daemonset_name} --type json -p='[{"op": "remove", "path": "/spec/template/spec/nodeSelector/kubernetes.io/hostname"}]'

Run ubuntu debug pod on current node

kubectl run -it ubuntu --image=ubuntu:latest --rm --overrides='{"spec": {"nodeSelector": {"kubernetes.io/hostname": "'$(hostname)'"}}}' -- /bin/bash

K3S

Display HA Node Token

sudo cat /var/lib/rancher/k3s/server/node-token

View auto generated config.toml

cat /var/lib/rancher/k3s/agent/etc/containerd/config.toml