# DevOps K8s in Tencent Cloud

## Introduction
In this article, we will guide you through the process of setting up a Kubernetes (K8s) cluster in Tencent Cloud as part of a DevOps workflow. Kubernetes is a powerful container orchestration platform that helps manage and scale containerized applications.

### Steps to DevOps K8s in Tencent Cloud
| Step | Description |
| ------ | ----------- |
| 1. | Create a Tencent Cloud account |
| 2. | Create a Kubernetes cluster |
| 3. | Connect to the Kubernetes cluster |
| 4. | Deploy an application |
| 5. | Monitor and manage the application |

### Step 1: Create a Tencent Cloud account
To get started, you will need to create a Tencent Cloud account if you don't already have one. Visit the Tencent Cloud website and follow the instructions to create your account.

### Step 2: Create a Kubernetes cluster
Now that you have a Tencent Cloud account, you can proceed to create a Kubernetes cluster. Use the Tencent Cloud console or the CLI to create a Kubernetes cluster with the desired configurations.

```
# Sample CLI command to create a Kubernetes cluster in Tencent Cloud
tke cluster create --name my-k8s-cluster --region ap-guangzhou --node-num 3
```

### Step 3: Connect to the Kubernetes cluster
Once the cluster is created, you need to configure your local environment to connect to the Kubernetes cluster. Obtain the cluster credentials and set them in your kubeconfig file.

```
# Set the kubeconfig file with cluster credentials
kubectl config set-cluster my-k8s-cluster --server=https://my-k8s-cluster.tencentcloudapi.com --insecure-skip-tls-verify=true
kubectl config set-credentials admin --token=**********
kubectl config set-context my-k8s-cluster --cluster=my-k8s-cluster --user=admin
kubectl config use-context my-k8s-cluster
```

### Step 4: Deploy an application
Now that you are connected to the Kubernetes cluster, you can deploy your application. Create a deployment configuration file and apply it to the cluster using kubectl.

```
# Sample deployment configuration file (deployment.yaml)
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-app
spec:
replicas: 3
selector:
matchLabels:
app: my-app
template:
metadata:
labels:
app: my-app
spec:
containers:
- name: my-app
image: my-registry/my-app:latest
ports:
- containerPort: 8080

# Apply the deployment configuration
kubectl apply -f deployment.yaml
```

### Step 5: Monitor and manage the application
You can use tools like Prometheus and Grafana to monitor the health of your application running in the Kubernetes cluster. Additionally, you can use kubectl commands to manage the application, such as scaling replicas or updating configurations.

```
# Get the status of the application pods
kubectl get pods

# Scale the number of replicas
kubectl scale deployment my-app --replicas=5

# Update the deployment image
kubectl set image deployment/my-app my-app=my-registry/my-app:new-tag
```

By following these steps, you have successfully set up a Kubernetes cluster in Tencent Cloud as part of a DevOps workflow. You can now deploy and manage containerized applications with ease. Happy coding!