Sunday, 30 October 2022
In this post, we have given the most useful commands of google kubernetes emgine. This will be handy reference.
Create Cluster
gcloud container clusters create my-cluster --zone us-central1-c --project my-kubernetes-project-123456
Get Credentials. This step helps to initialize the environment of cloud shell
gcloud container clusters get-credentials my-cluster --zone us-central1-c --project my-kubernetes-project-123456
Create deployment in kubernetes
kubectl create deployment hello-world-rest-api --image=shareGCP/hello-world-rest-api:0.0.1.RELEASE
kubectl get deployment
Expose the deployment to internet. This create a service in kubernetes
kubectl expose deployment hello-world-rest-api --type=LoadBalancer --port=8080
kubectl get services
kubectl get services --watch
Check whether the service is up
curl 55.184.204.214:8080/hello-world
Manually Scale in/out the number of instances/pods
kubectl scale deployment hello-world-rest-api --replicas=3
Manually Scale in/out the number of nodes
gcloud container clusters resize my-cluster --node-pool default-pool --num-nodes=2 --zone=us-central1-c
Setup autoscaling for the deployment and this increases or decreases number of pods
kubectl autoscale deployment hello-world-rest-api --max=4 --cpu-percent=70
kubectl get hpa
Setup autoscale for number of nodes in the cluster
gcloud container clusters update my-cluster --enable-autoscaling --min-nodes=1 --max-nodes=10
Create config map in kubernets so that these values can be used by the microservice deployed
kubectl create configmap hello-world--testconfig --from-literal=TEST_DB_NAME=oracle
kubectl get configmap
kubectl describe configmap hello-world-testconfig
Store the credentials in kubernetes. This will be accessible for microservices
kubectl create secret generic hello-world-secrets-2 --from-literal=RDS_PASSWORD=dummy
kubectl get secret
kubectl describe secret hello-world-secrets-2
Kubernetes deployment changes via yaml file
kubectl apply -f deployment.yaml
Create additional node pool -- Don't try its costly
gcloud container node-pools create new_pool_name --zone=us-central1-c --cluster=my-cluster
List the node pools creates as part of your cluster
gcloud container node-pools list --zone=us-central1-c --cluster=my-cluster
Set cluster name in your default configuration. This allows to execute kubectl commands without cluster name
gcloud config set container/cluster my-cluster
Sunday, 30 October 2022 by Team search · 0