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Kubernetes: How to evict a Pod from a node
3 min read
When we don't have the Pod's resources correctly configured we might face the need of moving a Pod to a different node. Although we could change the nodeSelector or adjust the resources to that it gets scheduled on a different node, it might urge us to fix an issue. To do so we can use kubectl drain
At the end of the day what we want it really is "drain the node of that kind of Pods". As kind of by product the node ends up being cordoned so we are sure the Pod won't be scheduled again on the same node.
25/10/2021
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Pod hooks: postStart and preStop
2 min read
If we need to execute some actions at container startup of before stopping the container we can me use of the container lifecycle hooks
24/09/2021
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Kubernetes: Remove taint from node
2 min read
With a taint on a node we can repel Pods as we saw on the post regarding taints and tolerations. So, if we want to taint a node we use kubectl taint as follows:
$ kubectl taint nodes minikube application=example:NoSchedule node/minikube taintedHow do we untaint a node?
13/09/2021
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How to configure an application to use SecurityGroups for Pods
4 min read
To be able to configure SecurityGroups we will have:
- Install SecurityGroups for Pods on the EKS cluster
- Configure the application to be able to actually use SecurityGroup for a Pods (this post)
This is what needs to be done considering that we are going to use an ALB to direct traffic to the application.
26/08/2021
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How to install SecurityGroups for Pods on an AWS EKS clusters
4 min read
To be able to configure SecurityGroups at the Pod level, we have two very differentiated tasks:
- Install SecurityGroups for Pods on the EKS cluster (this post)
- Configure the application to be able to actually use it
Let's take a look at what needs to be done on the cluster side.
25/08/2021
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