Create a Public Cluster with Public Node Group
Prerequisites
To be able to initialize a Cluster and Deploy a Workload , you need:
There is at least 1 VPC and 1 Subnet in ACTIVE state . If you do not have a VPC or Subnet yet, please create a VPC or Subnet according to the instructions here .
There is at least 1 SSH key in ACTIVE state . If you do not have any SSH key, please create an SSH key according to the instructions here .
Installed and configured kubectl on your device. Please refer here if you are not sure how to install and use kuberctl. In addition, you should not use a kubectl version that is too old, we recommend that you use a kubectl version that is no more than one version different from the cluster version.
Initialize Cluster
A cluster in Kubernetes is a collection of one or more virtual machines (VMs) connected together to run containerized applications. Cluster provides a unified environment to deploy, manage, and operate containers at scale.
To initialize a Cluster, follow the steps below:
Step 1: Visit https://vks.console.vngcloud.vn/overview
Step 2: At the Overview screen , select Activate.
Step 3: Wait until we successfully create your VKS account. After Activate successfully, select Create a Cluster
Step 4: At the Cluster initialization screen, we have set up information for the Cluster and a Default Node Group for you. You can keep these default values or adjust the desired parameters for the Cluster and Node Group at Cluster Configuration, Default Node Group Configuration, Plugin. By default we will create a Public Cluster for you with Public Node Group.
Step 5: Select Create Kubernetes cluster. Please wait a few minutes for us to initialize your Cluster, the Cluster's status is now Creating .
Step 6: When the Cluster status is Active , you can view Cluster information and Node Group information by selecting Cluster Name in the Name column .
Connect and check the newly created Cluster information
After the Cluster is successfully initialized, you can connect and check the newly created Cluster information by following these steps:
Step 1: Visit https://vks.console.vngcloud.vn/k8s-cluster
Step 2: The Cluster list is displayed, select the icon 
and select Download Config File to download the kubeconfig file. This file will give you full access to your Cluster.
Step 3 : Rename this file to config and save it to the ~/.kube/config directory
Step 4: Perform Cluster check via command:
Run the following command to test node
kubectl get nodesIf the results are returned as below, it means your Cluster was successfully initialized with 3 nodes as below.
NAME STATUS ROLES AGE VERSION
ng-0e10592c-e70e-404d-a4e8-5e3b80f805e4-834b7 Ready <none> 50m v1.28.8
ng-0e10592c-e70e-404d-a4e8-5e3b80f805e4-cf652 Ready <none> 23m v1.28.8
ng-0f4ed631-1252-49f7-8dfc-386fa0b2d29b-a8ef0 Ready <none> 28m v1.28.8Deploy a Workload
The following is a guide for you to deploy the nginx service on Kubernetes.
Step 1 : Create Deployment and Service for Nginx app
Create nginx-service.yaml file with the following content:
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-app
spec:
selector:
matchLabels:
app: nginx
replicas: 1
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.19.1
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx-service
spec:
selector:
app: nginx
ports:
- protocol: TCP
port: 80
targetPort: 80Deploy This deployment equals:
kubectl apply -f nginx-service.yamlStep 2: Check Deployment and Service information before exposing it to the Internet.
Run the following command to test Deployment
kubectl get svc,deploy,pod -owideIf the results are returned as below, it means you have successfully deployed the nginx service.
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 2d4h <none>
service/nginx-service ClusterIP 10.96.178.229 <none> 80/TCP 74s app=nginx
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/nginx-app 1/1 1 1 74s nginx nginx:1.19.1 app=nginx
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/nginx-app-7f45b65946-5pcvz 1/1 Running 0 74s 172.16.24.201 ng-3f06013a-f6a5-47ba-a51f-bc5e9c2b10a7-ecea1 <none> <none>Step 3: Expose Nginx Service to the Internet
Run the following command to expose nginx-service to the internet:
kubectl expose deployment nginx-app --type=NodePort --port=30080 --target-port=80If the results are returned as below, it means you have successfully exposed the Service to the Internet.
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 2d4h <none>
service/nginx-app NodePort 10.96.215.192 <none> 30080:31289/TCP 4s app=nginx
service/nginx-service ClusterIP 10.96.178.229 <none> 80/TCP 2m43s app=nginx
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/nginx-app 1/1 1 1 2m43s nginx nginx:1.19.1 app=nginx
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/nginx-app-7f45b65946-5pcvz 1/1 Running 0 2m43s 172.16.24.201 ng-3f06013a-f6a5-47ba-a51f-bc5e9c2b10a7-ecea1 <none> <noneStep 4: To access the just exported Nginx app, you can use the URL with the format:
http://<node_ip>:31289/Where node_ip can be the node_port address of any node in the cluster. You can get Node's External IP information at the vServer interface. Specifically, access at https://hcm-3.console.vngcloud.vn/vserver/v-server/cloud-server .
For example, below I have successfully accessed the nginx app with the address: http://61.28.231.65:31007/
If you want to expose this service through vLB Layer4, vLB Layer7, please refer to:
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