K8s/Run
export KUBECONFIG="${HOME}/.kube/lke-dev-kubeconfig.yaml"
export KUBECONFIG="${HOME}/.kube/gke-uat-kubeconfig.yaml"
export KUBECONFIG="${HOME}/.kube/eks-pro-kubeconfig.yaml"
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export KUBECONFIG="${HOME}/.kube/config"
kubectl config get-contexts
kubectl cluster-info
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kubectl get ns|grep swiss-knife
kubectl delete ns swiss-knife
kubectl create ns swiss-knife
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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-${USER} -- sh
kubectl -n swiss-knife port-forward svc/swiss-knife-${USER} 1980:80
kubectl -n swiss-knife port-forward svc/swiss-knife-${USER} :80
kubectl -n swiss-knife delete deploy swiss-knife-${USER}
kubectl -n swiss-knife delete svc swiss-knife-${USER}
kubectl -n swiss-knife delete pvc swiss-knife-${USER}-pvc
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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
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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-${USER}-pv
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cat << YML | kubectl apply -f -
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: swiss-knife-${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
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Playground
kubectl -n swiss-knife delete pods minio-cli
kubectl -n swiss-knife delete pods redis-cli
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kubectl -n swiss-knife delete pods infinity
kubectl -n swiss-knife delete pods psql
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kubectl -n swiss-knife run infinity --image=alpine -- sleep infinity
kubectl -n swiss-knife run ubuntu --image=ubuntu -- sleep infinity
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References
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