`kubectl`

23 commands

Apply a kustomization
Caution
```
kubectl apply -k .
```
Builds the kustomization in the directory and applies the resulting resources to the cluster.
- kubernetes
- deploy
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Apply a manifest
Caution
```
kubectl apply -f manifest.yaml
```
Creates or updates the resources declared in the manifest so the cluster matches the file.
- kubernetes
- deploy
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Delete a pod
Destructive
```
kubectl delete pod pod -n namespace
```
Deletes the pod, and its controller such as a deployment creates a replacement if one manages it.
- kubernetes
- troubleshooting
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Describe a node
```
kubectl describe node node
```
Shows the node's capacity, allocated resources, conditions and the pods running on it.
- kubernetes
- debug
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Describe a pod
```
kubectl describe pod pod -n default
```
Shows the pod's configuration, container states and recent events such as scheduling or image pull errors.
- kubernetes
- debug
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Follow the logs of a pod
```
kubectl logs -f pod
```
Streams the pod's logs as they are written, until you press Ctrl+C.
- kubernetes
- logs
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Forward a local port to a service
```
kubectl port-forward svc/my-service 8080:80
```
Forwards a local port to the pod or service so that you can reach it from your machine.
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List deployments in a namespace
```
kubectl get deployments -n default
```
Shows the deployments of the namespace with how many replicas are ready, up to date and available.
- kubernetes
- list
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List pods in a namespace
```
kubectl get pods -n default
```
Shows the pods of the namespace with their readiness, status, restart count and age.
- kubernetes
- list
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List pods with their node and IP
```
kubectl get pods -o wide -n default
```
Lists pods with extra columns such as their IP address and the node they run on.
- kubernetes
- list
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List resources in all namespaces
```
kubectl get all -A
```
Lists pods, services, deployments and other common resources across every namespace.
- kubernetes
- list
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List services in a namespace
```
kubectl get services -n default
```
Shows the services of the namespace with their type, cluster IP, external IP and ports.
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Open a shell in a pod
```
kubectl exec -it pod -- sh
```
Opens an interactive shell in the main container of the pod.
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Restart the pods of a deployment
Caution
```
kubectl rollout restart deployment/deployment
```
Replaces the deployment's pods one by one, for example to pick up a changed config map or secret.
- kubernetes
- deploy
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Scale a deployment
Caution
```
kubectl scale deployment/deployment --replicas=3
```
Sets the number of pods the deployment runs, creating or removing pods to match it.
- kubernetes
- deploy
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Show CPU and memory usage of pods
```
kubectl top pods -n default
```
Shows the current CPU and memory usage of each pod, which requires metrics-server in the cluster.
- kubernetes
- monitoring
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Show recent logs of a pod
```
kubectl logs --since=1h pod
```
Prints only the log lines written during the given recent period, such as 10m or 1h.
- kubernetes
- logs
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Show the logs of a crashed container
```
kubectl logs pod --previous
```
Prints the logs of the container's previous run, which shows why it crashed before being restarted.
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Show the logs of a deployment
```
kubectl logs deployment/deployment
```
Prints the logs of one pod picked from the deployment, so you do not need to look up a pod name.
- kubernetes
- logs
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Show the logs of one container in a pod
```
kubectl logs pod -c container
```
Prints the logs of a single container in a pod that runs several containers.
- kubernetes
- logs
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Show the objects of a manifest
```
kubectl get -f manifest.yaml
```
Shows the current state in the cluster of the objects declared in the manifest file.
- kubernetes
- list
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Switch to another cluster
Caution
```
kubectl config use-context context
```
Makes kubectl send its next commands to the cluster and user of the given kubeconfig context.
- kubernetes
- config
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Watch a deployment rollout
```
kubectl rollout status deployment/deployment
```
Waits and reports progress until the latest rollout of the deployment succeeds or fails.
- kubernetes
- deploy
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`kubectl`

Apply a kustomization

Apply a manifest

Delete a pod

Describe a node

Describe a pod

Follow the logs of a pod

Forward a local port to a service

List deployments in a namespace

List pods in a namespace

List pods with their node and IP

List resources in all namespaces

List services in a namespace

Open a shell in a pod

Restart the pods of a deployment

Scale a deployment

Show CPU and memory usage of pods

Show recent logs of a pod

Show the logs of a crashed container

Show the logs of a deployment

Show the logs of one container in a pod

Show the objects of a manifest

Switch to another cluster

Watch a deployment rollout

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