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<h1>k8 notes of Arie</h1>
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<pre class="code">#Bash into container
k exec -it wiki-dokuwiki-9f9fd859d-2wfx6 bash

### Useful aliases ###
kush [-n ns] pod_name   # get shell into pod
kud pod_name            # kubectl describe pod
kug pod pod_name        # kubectl get pod_name
ktail pod_name          # get logs for the pod

# fetch chart to analyse values.yaml
helm fetch gitlab/gitlab --untar

# debug certs
kug orders,challenges -o wide

# Delete PV that has finalizers
pv=pvc-daec7eed-fc8e-4281-a15b-6b370df54804
echo '{"metadata": {"finalizers": null}}' | kubectl patch pv $pv --patch-file=/dev/stdin
# Delete POD that got stuck (and no finalizers to delete)
kubectl delete pods fluent-bit-xczr2 --grace-period=0 --force

#copy file into pod
kubectl cp /mnt/common/tmp/run dev/page2-dp-77f87664bb-4l8mc:/tmp/run

# Delete namespace that got stuck
namespaceToDelete=brocha
kubectl get namespace "$namespaceToDelete" -o json | \
 jq 'del(.spec.finalizers)'   | \
 kubectl replace --raw /api/v1/namespaces/$namespaceToDelete/finalize -f -

# drain and evict pods from a node
kubectl drain --ignore-daemonsets --delete-emptydir-data k8i03
#untaint
kubectl uncordon k8i03

# port forwarding of localport 40090 to port 9090 of the svc
kubectl port-forward -n monitoring svc/prometheus-k8s 40090:9090 --address='0.0.0.0'

# see nodes labels
kug nodes --show-labels
# remove label worker from a node:
kubectl label node ip-10-0-7-187.ec2.internal worker-
# add control-plane label
kubectl label node k8r05 node-role.kubernetes.io/control-plane=
kubectl label node k8p01 general=yes

# See cpu/mem usage by nodes
kubectl top node

# Show pod by label
kug pod -n monitoring -l app.kubernetes.io/name=kube-state-metrics
# kill pods by label
kudel pod -n nqa -l app=etljobs-sel

# watch hpa of gwpa@rnd
kug hpa -n rnd gwpa-hpa --watch

# events on API of prod2 farm
kug events -n prod2

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