Deploy to GKE Cluster from Jenkins

Step 1:

1.1. Setup the necessary environment variables

1.2. Create a service account using the Google Cloud SDK , this is the service account that is used when you login into your cluster on the GCP. Alternatively you can also create a new SA different from your default login as provide necessary roles.

1.3. Creation of Custom IAM Role with minimum permissions

Refer to https://github.com/santoshkothapalli/s3/blob/main/IAMRole.yaml

1.4. Assign the Role created in 1.3 to the service account

1.5. Download the key , this is required to be uploaded in the Jenkins Google Kubernetes Plugin to connect to the GKE Cluster

Step2 : There are various plugins provided to connect to Kubernetes clusters , we will leverage the Google Kubernetes Engine Plugin

2.1 Installation of Plugin

Navigate to Jenkins Home Page and then to Manage Jenkins -> Manage Plugins -> Available

Search for Google Kubernetes Engine Plugin and install the plugin.

2.2 Configuration of Plugin

Once the Plugin is installed navigate to Manage Jenkins -> Manage Credentials -> Store (Name would depend upon Jenkins configuration)

Add the Credential with the name , note the name as this will be used in your pipeline , upload the key downloaded in step 1.5 . Refer to below screen shot

Sample Pipeline script which is self explanatory is available at below path which would create a pod with nginx image on your cluster.

https://github.com/santoshkothapalli/s3/blob/main/env/Jenkinsfile_gke1