Ingress demonstration
This is a demonstration of how to use Kubernetes Ingress to route traffic to different services in your cluster based on different paths.
Install nginx-ingress controller :
To get started, you will need to install the nginx-ingress controller in your Kubernetes cluster by running the following command:
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml
This will deploy the nginx-ingress controller as a Deployment in your cluster.
Create Deployments
Next, you will need to create some sample Deployments to route traffic to. Run the following commands to create the Deployments:
kubectl create deploy sample-1 --image=sumonaust/host-sample-1
kubectl create deploy sample-2 --image=sumonaust/host-sample-2
kubectl create deploy sample-3 --image=sumonaust/host-sample-3
kubectl create deploy sample-4 --image=devopsprosamples/next-sample-2
These commands will create four sample Deployments with different images.
Create services
After you have created the Deployments, you will need to create Services for each of them. Run the following commands to create the Services:
kubectl expose deploy sample-1 --type=ClusterIP --port=3000
kubectl expose deploy sample-2 --type=ClusterIP --port=3000
kubectl expose deploy sample-3 --type=ClusterIP --port=3000
kubectl expose deploy sample-4 --type=ClusterIP --port=3000
These commands will create four Services with ClusterIP type for each of the sample Deployments.
Create Ingress resource
Now that you have created the Services, you can create an Ingress resource to route traffic to them based on different paths. To create the Ingress resource, run the following command:
kubectl apply -f ingress-resource.yaml
This will create an Ingress resource with rules to route traffic to the sample Services based on different paths.
Install certificate manager
If you want to use HTTPS with your Ingress, you will need to install a certificate manager. Run the following command to install the Jetstack cert-manager:
kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.7.1/cert-manager.yaml
This will install the cert-manager as a Deployment in your cluster.
Create Clusterissuer
After you have installed the cert-manager, you can create a Clusterissuer to issue SSL certificates for your Ingress. Run the following commands to create the staging and production Clusterissuers:
kubectl apply -f staging_issuer.yaml
kubectl apply -f prod_issuer.yaml
These commands will create two Clusterissuers, one for staging and one for production.
Other Commands
Here are some other useful commands to help you manage your Kubernetes cluster:
To view deployments
kubectl get deploy
To view services
kubectl get svc
To view ingress
kubectl get ing
To describe ingress
kubectl describe ing <ing-name>
To view clusterissuer
kubectl get clusterissuer
To view certificate
kubectl get certificate
To describe certificate
kubectl describe certificate
sudo nano /etc/resolv/conf
sudo systemctl start resolvconf.service
sudo systemctl enable resolvconf.service
kubectl get all -n ingress-nginx
kubectl get ing
kubectl describe ing example-ingress
Command: FES
# Create minikube cluster
minikube start --nodes 3 -p monitor-cluster
kubectl get nodes -o wide
kubectl get <resource> or kubectl describe <resource>
kubectl logs pod-name
kubectl port-forward svc/elasticsearch 9200
kubectl logs pod/nginx
kubectl get svc
kubectl port-forward svc/kibana 8080
kubernetes.namespace_name:default
#Add filter
Field=kubernetes.pod-name is one of
value= nginx kibana