deleteBeforeReplace

doesn't look right to me, because cluster will stay w/o nodes till new node group is created

code

import * as eks from "@pulumi/eks";
...

commonName = '<env name here>'

const eksCluster = new eks.Cluster(commonName, {
  vpcId: vpc.id,
  fargate: false,
  skipDefaultNodeGroup: true,

...

const eksManagedNodeGroup = eks.createManagedNodeGroup(
  commonName,
  {
    cluster: eksCluster,
    nodeGroupName: commonName,
    nodeRoleArn: eksWorkerNodeGroupRole.arn,
...
  },
  eksCluster
);

I'd prefer eks lib to make nodeGroupName arg optional and generate it from resource name + suffix, using new suffix everytime new resource is created. The same approach which is usually used in other resources