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Hi all ! What would be the best approach of creating NodeGroups using EKS with _*some additional commands to run during bootstrap*_. I have tried a number of approaches provided by Pulumi but none of them seem to be working out.

Using the AWS Classic package:
• No feature to add any additional bootstrap commands
Using the pulumi_eks package:
• Using _NodeGroups_ option will bring up the NodeGroups but the instances are not attached to the Cluster (Launch configuration does contain the commands though)
• Using _ManagedNodeGroups_, Additional bootstrap commands not added to the launch template
Would appreciate some guidance with this problem.

Based on my research,
&gt; AWS Classic package
has no option of adding, bootstrap commands at all. The best way over here would be to create an AMI based off of Amazon Linux 2 EKS optimized and then add the additional commands here

&gt; pulumi_eks
Add newly created NodeGroups to the cluster by following this article maybe?
<https://aws.amazon.com/premiumsupport/knowledge-center/eks-worker-nodes-cluster/>

&gt; managed nodegroups in pulumi_eks
Same approach as AWS Classic package.

I ve checked out this file from AWS Classic: <https://github.com/pulumi/pulumi-aws/blob/master/sdk/go/aws/eks/nodeGroup.go>

and this from pulumi_eks:
<https://github.com/pulumi/pulumi-eks/blob/master/nodejs/eks/nodegroup.ts#L832-L920>

both places there is no provision to add additional commands to the user data

This may be an obvious point, so apologies, would you not do this by creating a custom launch configuration/template and passing it to the node group?

That is going to be my next move, creating a custom Launch Template with the EKS AMI commands. I was curious if I was missing something obvious.

Also the reason for all the digging was that eksctl allows the user to add additional commands using the `preBootstrapCommands` parameter.

Any how thank you for responding and confirming my doubts :slightly_smiling_face:

Yeah I'd have to look at the AWS API to see how it does it, whether eksctl is just creating a launch template behind the scenes or if this is supported more natively in some way. 

&gt; whether eksctl is just creating a launch template behind the scenes
This is how they do it.
Its a part of the CloudFormation template that comes up when they are bringing up the NodeGroup.