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44 lines
1.2 KiB
Markdown
44 lines
1.2 KiB
Markdown
# Kubectl
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## TL;DR
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```shell
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# list resources
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kubectl get pods
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kubectl get pods -n kube-system coredns-845757d86-47np2
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kubectl get namespaces --show-labels
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kubectl get services -o wide
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# start a pod
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kubectl run nginx --image nginx
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# taint a node
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kubectl taint nodes node1 key1=value1:NoSchedule
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# taint all nodes in a certain nodepool (azure aks)
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kubectl get nodes \
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-l "agentpool=nodepool1" \
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-o jsonpath='{.items[*].metadata.name}'
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| xargs -n1 -I{} -p kubectl taint nodes {} key1=value1:NoSchedule
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# remove a taint
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# notice the '-' sign at the end
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kubectl taint nodes node1 key1=value1:NoSchedule-
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# delete non-default service accounts
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kubectl delete serviceaccounts \
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$(kubectl get serviceaccounts -o jsonpath="{.items[?(@.metadata.name!='default')].metadata.name}" \
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| tr ' ' ',')
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```
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## Further readings
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- [Assigning Pods to Nodes]
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- [Taints and Tolerations]
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- [Commands reference]
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[assigning pods to nodes]: https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/
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[taints and tolerations]: https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/
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[commands reference]: https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands
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