Create a new K8s deployment/cluster on MS Azure
First create the cluster in Azure Kubernetes, with the appropriate resource group and name.
We will be using the commandline tool az from the Azure Cloudshell.
george [ ~/k8s ]$ az group create --location ukwest --resource-group myaksrg
{
"id": "/subscriptions/629a8f44-c84d-459e-bc17-64c887c78ced/resourceGroups/myaksrg",
"location": "ukwest",
"managedBy": null,
"name": "myaksrg",
"properties": {
"provisioningState": "Succeeded"
},
"tags": null,
"type": "Microsoft.Resources/resourceGroups"
}
Create a new cluster with 1 node and ssh key for accessing it.
az aks create \
--resource-group myaksrg \
--name myakscluster \
--node-count 1 \
--generate-ssh-keys
Run the below from the cloudshell to access the cluster:
az aks get-credentials --resource-group myaksrg --name myakscluster
Run these to apply the deployment and service files:
kubectl apply -f nginx-deployment.yaml
kubectl apply -f nginx-service.yaml
You can check the status of your deployment and service plus public IP address using the following commands:
kubectl get deployments
kubectl get services
To list deployments:
george [ ~/k8s ]$ kubectl get deployments
NAME READY UP-TO-DATE AVAILABLE AGE
nginx-deployment 3/3 3 3 29s
To list services:
george [ ~/k8s ]$ kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 6m14s
nginx-service LoadBalancer 10.0.26.198 20.254.x.y 80:32288/TCP 64s
To connect to the IP address via port 80, use the browser with the EXTERNAL-IP address.
You can also use telnet on the same http port.
george@dom:~/Documents/new-cv$ telnet 20.254.x.y 80
Trying 20.254.x.y...
Connected to 20.254.x.y.
Escape character is '^]'.
GET /
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
To list pods and connect to a pod:
kubectl get pods
kubectl exec --stdin --tty <pod-name> -- /bin/bash
Let’s see an example:
george [ ~/k8s ]$ kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-deployment-576c6b7b6-9x2w6 1/1 Running 0 5m43s
nginx-deployment-576c6b7b6-skhjs 1/1 Running 0 5m43s
nginx-deployment-576c6b7b6-xmd8h 1/1 Running 0 5m43s
To connect, use kubectl exec as per below. Exit by pressing Ctrl+D:
george [ ~/k8s ]$ kubectl exec --stdin --tty nginx-deployment-576c6b7b6-9x2w6 -- /bin/bash
root@nginx-deployment-576c6b7b6-9x2w6:/# ls
bin boot dev docker-entrypoint.d docker-entrypoint.sh etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
To return snapshot logs from all containers in pods defined by label app=nginx:
george [ ~/k8s ]$ kubectl logs -l app=nginx
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
[..]
10.224.0.4 - - [10/Jan/2025:16:30:02 +0000] "GET / HTTP/1.1" 200 615 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0" "-"
10.224.0.4 - - [10/Jan/2025:16:30:03 +0000] "GET /favicon.ico HTTP/1.1" 404 153 "http://20.254.242.128/" "Mozilla/5.0 (X11; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0" "-"
2025/01/10 16:30:03 [error] 30#30: *10 open() "/usr/share/nginx/html/favicon.ico" failed (2: No such file or directory), client: 10.224.0.4, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "20.254.242.128", referrer: "http://20.254.242.128/"
To delete the resource group and the included kubernetes deployment:
az group delete -n myaksrg
The files used for the kubectl deployment.
/first-cluster/nginx-service.yaml
apiVersion: v1
kind: Service
metadata:
name: nginx-service
spec:
type: LoadBalancer
ports:
- port: 80
targetPort: 80
selector:
app: nginx
/first-cluster/nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:latest
ports:
- containerPort: 80