brew install kops terraform kubernetes-helm kubectlTo create a kubernetes cluster with kops you need a few bits of infrastructure already in place. This includes an IAM user for kops to use, a DNS zone for routing, an S3 bucket to store config, etc. This can be created simply using the terraform scripts.
# Run the terraform
terraform apply terraformNow we can create the cluster itself.
# Export AWS Environment vars
export AWS_ACCESS_KEY_ID=$(terraform output k8s-access-key-id)
export AWS_SECRET_ACCESS_KEY=$(terraform output k8s-secret-access-key)
# Export kops vars
# _you should probably add these to your .bashrc/.zshrc but you might want to
# hard code the values rather than pointing to the terraform output_
export KOPS_CLUSTER_NAME="cluster.$(terraform output k8s-dns-zone)"
export KOPS_STATE_STORE="s3://$(terraform output k8s-state-bucket)"
# Generate the cluster config (this gets stored in the S3 bucket)
kops create cluster --cloud aws --zones eu-west-2a ${KOPS_CLUSTER_NAME}
# Check config and make any modifications to the scaling groups etc
kops edit cluster ${KOPS_CLUSTER_NAME}
# Start the cluster, a kops update ensures the AWS infrastructure matches the config
kops update cluster ${KOPS_CLUSTER_NAME} --yesGo through each of the services in cluster-services and install as per the README.md there.
Install the pod disruption budgets as per pod-disruption-budgets/README.md.
If a cluster already exists you can retrieve the kubectl config by setting the KOPS_CLUSTER_NAME and KOPS_STATE_STORE vars and then running the following command.
export KOPS_CLUSTER_NAME="cluster.k8s.informaticslab.co.uk"
export KOPS_STATE_STORE="s3://informticslab-k8s-config"
kops export kubecfg --name ${KOPS_CLUSTER_NAME}You should then be able to use kubectl. For example you can list the namespaces.
kubectl get ns