Karpenter Deployment Plan – Phased Approach

Step 1: Karpenter controller role create and attach policy

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Karpenter",
      "Effect": "Allow",
      "Action": [
        "ssm:GetParameter",
        "ec2:DescribeImages",
        "ec2:RunInstances",
        "ec2:DescribeSubnets",
        "ec2:DescribeSecurityGroups",
        "ec2:DescribeLaunchTemplates",
        "ec2:DescribeInstances",
        "ec2:DescribeInstanceTypes",
        "ec2:DescribeInstanceTypeOfferings",
        "ec2:DeleteLaunchTemplate",
        "ec2:CreateTags",
        "ec2:CreateLaunchTemplate",
        "ec2:CreateFleet",
        "ec2:DescribeSpotPriceHistory",
        "pricing:GetProducts"
      ],
      "Resource": "*"
    },
    {
      "Sid": "ConditionalEC2Termination",
      "Effect": "Allow",
      "Action": "ec2:TerminateInstances",
      "Resource": "*",
      "Condition": {
        "StringLike": {
          "ec2:ResourceTag/karpenter.sh/nodepool": "*"
        }
      }
    },
    {
      "Sid": "PassNodeIAMRole",
      "Effect": "Allow",
      "Action": "iam:PassRole",
      "Resource": "arn:aws:iam::961489959441:role/Axis-MF-MSIL-PRE-PROD-CLUSTER-NodeInstanceRole"
    },
    {
      "Sid": "EKSClusterEndpointLookup",
      "Effect": "Allow",
      "Action": "eks:DescribeCluster",
      "Resource": "arn:aws:eks:ap-south-1:961489959441:cluster/Axis-MF-MSIL-PRE-PROD-CLUSTER"
    },
    {
      "Sid": "AllowScopedInstanceProfileCreationActions",
      "Effect": "Allow",
      "Action": [
        "iam:CreateInstanceProfile"
      ],
      "Resource": "*",
      "Condition": {
        "StringEquals": {
          "aws:RequestTag/kubernetes.io/cluster/Axis-MF-MSIL-PRE-PROD-CLUSTER": "owned",
          "aws:RequestTag/topology.kubernetes.io/region": "ap-south-1"
        },
        "StringLike": {
          "aws:RequestTag/karpenter.k8s.aws/ec2nodeclass": "*"
        }
      }
    },
    {
      "Sid": "AllowScopedInstanceProfileTagActions",
      "Effect": "Allow",
      "Action": [
        "iam:TagInstanceProfile"
      ],
      "Resource": "*",
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/kubernetes.io/cluster/Axis-MF-MSIL-PRE-PROD-CLUSTER": "owned",
          "aws:ResourceTag/topology.kubernetes.io/region": "ap-south-1",
          "aws:RequestTag/kubernetes.io/cluster/Axis-MF-MSIL-PRE-PROD-CLUSTER": "owned",
          "aws:RequestTag/topology.kubernetes.io/region": "ap-south-1"
        },
        "StringLike": {
          "aws:ResourceTag/karpenter.k8s.aws/ec2nodeclass": "*",
          "aws:RequestTag/karpenter.k8s.aws/ec2nodeclass": "*"
        }
      }
    },
    {
      "Sid": "AllowScopedInstanceProfileActions",
      "Effect": "Allow",
      "Action": [
        "iam:AddRoleToInstanceProfile",
        "iam:RemoveRoleFromInstanceProfile",
        "iam:DeleteInstanceProfile"
      ],
      "Resource": "*",
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/kubernetes.io/cluster/Axis-MF-MSIL-PRE-PROD-CLUSTER": "owned",
          "aws:ResourceTag/topology.kubernetes.io/region": "ap-south-1"
        },
        "StringLike": {
          "aws:ResourceTag/karpenter.k8s.aws/ec2nodeclass": "*"
        }
      }
    },
    {
      "Sid": "AllowInstanceProfileReadActions",
      "Effect": "Allow",
      "Action": "iam:GetInstanceProfile",
      "Resource": "*"
    }
  ]
}

Step2: Tag security group of cluster:

aws ec2 create-tags --tags "Key=karpenter.sh/discovery,Value=MF-MS-PRE-PROD-CLUSTER" --resources "sg-06ee27bb7de43cf6e"