Can I use
eksctl to manage clusters which weren't created by
Yes! From version
0.40.0 you can run
eksctl against any cluster, whether it was created
eksctl or not. Find out more here.
How can I change the instance type of my nodegroup?
From the point of view of
eksctl, nodegroups are immutable. This means that once created the only thing
eksctl can do is scale the nodegroup up or down.
To change the instance type, create a new nodegroup with the desired instance type, then drain it so that the workloads move to the new one. After that step is complete you can delete the old nodegroup
How can I see the generated userdata for a nodegroup?
First you'll need the name of the Cloudformation stack that manages the nodegroup:
$ eksctl utils describe-stacks --region=us-west-2 --cluster NAME
You can execute the following to get the userdata. Note the final line which decodes from base64 and uncompresses the gzipped data.
NG_STACK=eksctl-scrumptious-monster-1595247364-nodegroup-ng-29b8862f # your stack here LAUNCH_TEMPLATE_ID=$(aws cloudformation describe-stack-resources --stack-name $NG_STACK \ | jq -r '.StackResources | map(select(.LogicalResourceId == "NodeGroupLaunchTemplate") | .PhysicalResourceId)') aws ec2 describe-launch-template-versions --launch-template-id $LAUNCH_TEMPLATE_ID \ | jq -r '.LaunchTemplateVersions.LaunchTemplateData.UserData' \ | base64 -d | gunzip
How do I set up ingress with
For the Nginx Ingress Controller, setup would be the same as any on other Kubernetes cluster.
I'm using an HTTPS proxy and cluster certificate validation fails, how can I use the system CAs?
Set the environment variable
KUBECONFIG_USE_SYSTEM_CA to make
respect the system certificate authorities.