Add a tag to all AWS resources that are created by Cortex

[deliahu]

Description

Add a tag to all AWS resources associated with a Cortex cluster.

Allow users to specify custom tags, default to cortex.dev/cluster-name.

Notes

Currently, adding tags to EKS clusters is supported, however these tags are not propagated to the resources in the cluster (e.g. instances, load balancers etc). It may be possible to assign tags to the instances via the eksctl nodegroup configuration (search "tags" in the ekstcl configuration schema). Load balancers may require manual tagging.

Motivation

Enable users to explore costs related to Cortex clusters in the AWS web console.

Notes

• Add tags where possible in eksctl config (search "tags" in the ekstcl configuration schema)
• Load balancer tags (service.beta.kubernetes.io/aws-load-balancer-additional-resource-tags)
• NAT tags?
• Manually apply cloudwatch logs/metrics tags
• Other resources to add?

Related issues

• EKS Tagging aws/containers-roadmap#82 (comment)
• AWS::EKS::Cluster Tags aws-cloudformation/cloudformation-coverage-roadmap#200
• find out why EKS API doesn't support tags – file a bug eksctl-io/eksctl#25
• CloudFormation limitations eksctl-io/eksctl#778