Amazon EKS Upgrade Utility

Amazon EKS cluster upgrade is a utility that automates the upgrade process for Amazon EKS clusters.

Checks post v0.9.0

The pre/post-flight checks are removed in favor of guiding the user to evaluate their clusters with existing tools which handle this better such as eksup. The existing pre/post checks will be replaced with relevant checks specific to the upgrade (based on previous understanding the cluster is eligible for such an upgrade).

Cluster Upgrade

1. Control plane upgrade - This is handled entirely by AWS once the version upgrade has been requested.
2. Identification of Managed and Self-managed node - The worker nodes are identified as EKS managed and Self-managed to perform upgrade.
3. Managed Node group update - Updates managed node group to the specified version.
4. Self-managed Node group update
   • Launch new nodes with upgraded version and wait until they require ready status for next step.
   • Mark existing nodes as unschedulable.
   • If pod disruption budget (PDB) is present then check for force eviction flag (--force) which is given by user, only then evict the pods or continue with the flow.

Pre-Requisites

Before running eksupgrade, you will need to have permission for both AWS and the Kubernetes cluster itself.

1. Install eksupgrade locally:

python -m pip install eksupgrade

2. Ensure you have the necessary AWS permissions; an example policy of required permissions is listed below:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "iam",
      "Effect": "Allow",
      "Action": [
        "iam:GetRole",
        "sts:GetAccessKeyInfo",
        "sts:GetCallerIdentity",
        "sts:GetSessionToken"
      ],
      "Resource": "*"
    },
    {
      "Sid": "ec2",
      "Effect": "Allow",
      "Action": [
        "autoscaling:CreateLaunchConfiguration",
        "autoscaling:Describe*",
        "autoscaling:SetDesiredCapacity",
        "autoscaling:TerminateInstanceInAutoScalingGroup",
        "autoscaling:UpdateAutoScalingGroup",
        "ec2:Describe*",
        "ssm:*"
      ],
      "Resource": "*"
    },
    {
      "Sid": "eks",
      "Effect": "Allow",
      "Action": [
        "eks:Describe*",
        "eks:List*",
        "eks:UpdateAddon",
        "eks:UpdateClusterVersion",
        "eks:UpdateNodegroupVersion"
      ],
      "Resource": "*"
    }
  ]
}

3. Update your local kubeconfig to authenticate to the cluster:

aws eks update-kubeconfig --name <CLUSTER-NAME> --region <REGION>

Usage

To view the arguments and options, run:

eksupgrade --help

 Usage: eksupgrade [OPTIONS] CLUSTER_NAME CLUSTER_VERSION REGION

 Run eksupgrade against a target cluster.

╭─ Arguments ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ *    cluster_name         TEXT  The name of the cluster to be upgraded [default: None] [required]                                                                                                                                                        │
│ *    cluster_version      TEXT  The target Kubernetes version to upgrade the cluster to [default: None] [required]                                                                                                                                       │
│ *    region               TEXT  The AWS region where the target cluster resides [default: None] [required]                                                                                                                                               │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
╭─ Options ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ --max-retry                                    INTEGER  The most number of times to retry an upgrade [default: 2]                                                                                                                                        │
│ --force                 --no-force                      Force the upgrade (e.g. pod eviction with PDB) [default: no-force]                                                                                                                               │
│ --preflight             --no-preflight                  Run pre-upgrade checks without upgrade [default: no-preflight]                                                                                                                                   │
│ --parallel              --no-parallel                   Upgrade all nodegroups in parallel [default: no-parallel]                                                                                                                                        │
│ --latest-addons         --no-latest-addons              Upgrade addons to the latest eligible version instead of default [default: no-latest-addons]                                                                                                     │
│ --disable-checks        --no-disable-checks             Disable the pre-upgrade and post-upgrade checks during upgrade scenarios [default: no-disable-checks]                                                                                            │
│ --interactive           --no-interactive                If enabled, prompt the user for confirmations [default: interactive]                                                                                                                             │
│ --version                                               Display the current eksupgrade version                                                                                                                                                           │
│ --install-completion                                    Install completion for the current shell.                                                                                                                                                        │
│ --show-completion                                       Show completion for the current shell, to copy it or customize the installation.                                                                                                                 │
│ --help                                                  Show this message and exit.                                                                                                                                                                      │
╰──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯

Support & Feedback

This project is maintained by AWS Solution Architects and Consultants. It is not part of an AWS service and support is provided best-effort by the maintainers. To post feedback, submit feature ideas, or report bugs, please use the Issues section of this repo. If you are interested in contributing, please see the Contribution guide.

Security

See CONTRIBUTING for more information.

License

This library is licensed under the MIT-0 License. See the LICENSE file.