# Kubernete Helper

[Notion](https://www.notion.so/jusbrasil/Kubernetes-63bf1083f9b44888ade0a3ae246fd036#7dcecf3ec2a34305855347a008c0f5e1)

[Introduction](https://aws.plainenglish.io/introduction-to-kubernetes-850907f54627)

[Archtecture](https://aws.plainenglish.io/kubernetes-architecture-c93cb9c798d8)

[Troubleshooting](https://learnk8s.io/troubleshooting-deployments)

## Options

### Watch mode
-w

### Namescape

#### Show you current default namespace (empty=default)
kl config view --minify | grep namespace:
#### Config you default namespace
kl config set-context --current --namespace=<insert-namespace-name-here>
#### Run commands with selected namespace
-n <namespace>

##### to select all namespaces:
--all-namespaces

### Additional variable envs
--additional_env_vars VAR_NAME=content

## Show components

### List:
kl get pod
kl get pod | grep <filter-by-name>
kl get services
kl get statefulSets
kl get deployments
kl get nodes
kl get namespaces
kl get cronjobs
kl get jobs

### Describe details
kl describe pod <pod-name>
kl describe service <service-name>
kl describe deployment <service-name>
kl describe node <node-name>

### Show logs
kl logs -f <pod-name>
kl logs -f <pod-name> | grep <filter>
kl logs -f -l <label-name>=<label>
#### Attach
kl attach -it <pod-name>

## Copy files
kl cp <pod>:<filename> <dest-dir> -n <namespace>

## Deploy management

#### Create a new pod
kl batch <service-name> bash
kl exec -it <service-name> bash

#### Restart deployment
kl rollout restart deployment/<deployment-name>

#### Rollback deployment
kl rollout undo deploy <deployment-name>
kl rollout undo deploy <deployment-name> --to-revision=3

kl rollout history deploy <deployment-name>
kl rollout history deploy <...> --revision=<revision-number> | grep Image:
kl set image deploy/nginx-kube 'nginx=$VERSION'
kl rollout status deployment/<name> -n <namespace>

#### Delete
kl delete pod <pod-name>
kl delete service <deployment-name>
kl delete deployments <deployment-name>
kl delete deployments,service <name> --namespace=development

### Scale

#### update scales by xml
kl edit deployment <deployment>

#### Update keda (autoscale)

###### Change maxReplicaCount and minReplicaCount
kl edit scaledobject.keda.sh <deployment>

#### Force autoscale
kl scale

#### Change replicas count
kl scale --replicas=8 deploy/<deployment>

### Port forwarding
kl pf <pod> PORT:TARGET

### Configuration management

###### create new component
kl create -f <component>.yaml

###### update component
kl apply -f <component>.yaml

### Cronjob

##### Force run a cronjob:
kl create job --from=cronjob/<cronjob-name> <cronjob-name-@dev> -n <namespace>