K8s/Run: Difference between revisions

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==Apply==
==Apply==
===Apply » Infinity===
===Apply » Minikube » ${USER}===
{|
| valign="top" |
<syntaxhighlight lang="yaml">
cat << YML | kubectl -n swiss-knife apply -f -
---
apiVersion: v1
kind: Service
metadata:
  name: swiss-knife-${USER}
spec:
  ports:
  - port: 80
  selector:
    app: swiss-knife-${USER}
  clusterIP: None
YML
</syntaxhighlight>
----
<syntaxhighlight lang="bash">
kubectl -n swiss-knife exec -it  svc/swiss-knife-${USER} -c nginx -- sh
kubectl -n swiss-knife exec -it  svc/swiss-knife-${USER} -- sh
kubectl -n swiss-knife delete deploy swiss-knife-${USER}
kubectl -n swiss-knife delete svc    swiss-knife-${USER}
kubectl -n swiss-knife delete pvc    swiss-knife-${USER}-pvc
</syntaxhighlight>
 
| valign="top" |
 
<syntaxhighlight lang="yaml">
cat << YML | kubectl -n swiss-knife apply -f -
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: swiss-knife-${USER}-pvc
spec:
  storageClassName: standard
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: swiss-knife-${USER}
spec:
  selector:
    matchLabels:
      app: swiss-knife-${USER}
  replicas: 1
  template:
    metadata:
      labels:
        app: swiss-knife-${USER}
    spec:
      containers:
      - name: nginx
        image: nginx:1.27-alpine
        ports:
        - containerPort: 80
        volumeMounts:
          - mountPath: /opt/swiss-knife/${USER}
            name: ${USER}-data
      volumes:
        - name: ${USER}-data
          persistentVolumeClaim:
            claimName: swiss-knife-${USER}-pvc
      restartPolicy: Always
YML
</syntaxhighlight>
|}
----
===Apply » Minikube » Infinity===
{|
{|
| valign="top" |
| valign="top" |

Revision as of 20:48, 27 August 2024

export KUBECONFIG="${HOME}/.kube/lke-dev-kubeconfig.yaml"
export KUBECONFIG="${HOME}/.kube/gke-uat-kubeconfig.yaml"
export KUBECONFIG="${HOME}/.kube/eks-pro-kubeconfig.yaml"

export KUBECONFIG="${HOME}/.kube/config"
kubectl config get-contexts
kubectl cluster-info

kubectl get ns|grep swiss-knife
kubectl delete ns   swiss-knife
kubectl create ns   swiss-knife

Run

Run » PSQL

kubectl -n swiss-knife run -i --tty --rm psql --image=alpine --restart=Never -- sh
echo -n password: ;read -s PGPASSWORD;export PGPASSWORD;echo
apk --update add postgresql-client inetutils-telnet

psql -d postgres -U postgres -h postgresql.postgresql

Run » Infinity

kubectl -n swiss-knife run infinity --image=alpine -- sleep infinity
kubectl -n swiss-knife exec -it infinity -- sh
apk --update add inetutils-telnet

Run » Redis CLI

kubectl -n swiss-knife run -i --tty --rm redis-cli --image=alpine --restart=Never -- sh
echo -n password: ;read -s REDISCLI_AUTH;export REDISCLI_AUTH;echo
apk --update add redis inetutils-telnet

echo 'ping'|redis-cli -h redis-headless.redis

Run » MinIO CLI

kubectl -n swiss-knife run -i --tty --rm minio-cli --image=alpine --restart=Never -- sh
apk --update add minio-client inetutils-telnet

echo -n password: ;\
read -s MINIO_SERVER_ROOT_PASSWORD;\
export  MINIO_SERVER_ROOT_PASSWORD;\
export  MINIO_SERVER_ROOT_USER=admin;\
export  MINIO_SERVER_HOST=minio.k8s.local;echo

mcli ping --error-count 5 minio.minio
mcli ping --count 5 minio.minio

telnet minio.minio 9000
telnet minio.minio 9001

Apply

Apply » Minikube » ${USER}

cat << YML | kubectl -n swiss-knife apply -f -
---
apiVersion: v1
kind: Service
metadata:
  name: swiss-knife-${USER}
spec:
  ports:
  - port: 80
  selector:
    app: swiss-knife-${USER}
  clusterIP: None
YML

kubectl -n swiss-knife exec -it  svc/swiss-knife-${USER} -c nginx -- sh
kubectl -n swiss-knife exec -it  svc/swiss-knife-${USER} -- sh
kubectl -n swiss-knife delete deploy swiss-knife-${USER}
kubectl -n swiss-knife delete svc    swiss-knife-${USER}
kubectl -n swiss-knife delete pvc    swiss-knife-${USER}-pvc

cat << YML | kubectl -n swiss-knife apply -f -
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: swiss-knife-${USER}-pvc
spec:
  storageClassName: standard
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: swiss-knife-${USER}
spec:
  selector: 
    matchLabels:
      app: swiss-knife-${USER}
  replicas: 1
  template:
    metadata:
      labels:
        app: swiss-knife-${USER}
    spec:
      containers:
      - name: nginx
        image: nginx:1.27-alpine
        ports:
        - containerPort: 80
        volumeMounts:
          - mountPath: /opt/swiss-knife/${USER}
            name: ${USER}-data
      volumes:
        - name: ${USER}-data
          persistentVolumeClaim:
            claimName: swiss-knife-${USER}-pvc
      restartPolicy: Always
YML

Apply » Minikube » Infinity

kubectl -n swiss-knife get pvc swiss-knife-${USER}-pvc
kubectl                get pv  swiss-knife-${USER}-pv

kubectl -n swiss-knife delete pods infinity

kubectl -n swiss-knife run infinity --image=alpine --overrides="$(cat << JSON
{ "apiVersion": "v1",
  "spec": {
    "volumes": [{
        "name": "data",
        "persistentVolumeClaim":
          {"claimName": "swiss-knife-${USER}-pvc"}}],
    "containers": [{
      "name": "infinity",
      "image": "alpine",
      "volumeMounts": [{
          "name": "data",
          "mountPath": "/opt/data-${USER}"}]}]}}
JSON
)" -- sleep infinity

kubectl -n swiss-knife delete pvc swiss-knife-${USER}-pvc
kubectl                delete pv  swiss-knife-${USER}-pv

cat << YML | kubectl apply -f -
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: swiss-knife-${USER}-pv
  annotations:
    pv.kubernetes.io/provisioned-by: k8s.io/minikube-hostpath
spec:
  capacity:
    storage: 10Gi
  hostPath:
    path: /tmp/hostpath-provisioner/swiss-knife/data-${USER}
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Delete
  storageClassName: standard
  volumeMode: Filesystem
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: swiss-knife-${USER}-pvc
  namespace: swiss-knife
  labels:
    app.kubernetes.io/component: primary
    app.kubernetes.io/instance: infinity
    app.kubernetes.io/name: infinity
  annotations:
    volume.beta.kubernetes.io/storage-provisioner: k8s.io/minikube-hostpath
    volume.kubernetes.io/storage-provisioner: k8s.io/minikube-hostpath
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
  volumeName: swiss-knife-${USER}-pv
  storageClassName: standard
  volumeMode: Filesystem
---
YML

Playground

kubectl -n swiss-knife delete pods minio-cli
kubectl -n swiss-knife delete pods redis-cli

kubectl -n swiss-knife delete pods infinity
kubectl -n swiss-knife delete pods psql

kubectl -n swiss-knife run infinity --image=alpine -- sleep infinity
kubectl -n swiss-knife run ubuntu   --image=ubuntu -- sleep infinity

References

Retrieved from "https://cdn.chorke.org/weke/index.php?title=K8s/Run&oldid=12750"