148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

Chapter 2 ■ Kubernetes on CoreOS on AWS
Figure 2-6. Creating a KMS key
Setting Up an External DNS Name
Next you need to register a domain name with a domain registrar, as we shall be using the domain’s external
DNS name to make the cluster API accessible. We have used the external DNS name NOSQLSEARCH.COM. The
NOSQLSEARCH.COM domain is not usable for all users, and different users would need to register a different
domain name with a domain registry. Or, use a domain that is already registered.
Creating the Cluster
Creating a cluster requires the following procedure:
1. Create an asset directory.
2. Initialize the CloudFormation stack.
3. Render the contents of the asset directory.
4. Customize the cluster optionally in the cluster.yaml file.
5. Validate the CloudFormation stack and the cloud-config user data files.
6. Launch the CloudFormation stack.
We shall discuss each of these stages next.
Creating an Asset Directory
Create a directory on the Amazon Linux EC2 instance for the generated assets. Then cd (change directory) to
the asset directory:
mkdir coreos-cluster
cd coreos-cluster
29