• Kubernetes running out of Pods

  2 min read

  
  

  If you try to run too many pods on a handful of nodes you might eventually run out of available Pods. Using kubectl get pods you'll see them marked with the status OutOfpods:

  $ kubectl get pods
  (...)
  test          deploy-test-84b4fdcbbd-59hvf            0/1     ContainerCreating   0                44s
  test          deploy-test-84b4fdcbbd-7dvs9            0/1     OutOfpods           0                62s
  test          deploy-test-84b4fdcbbd-btrwz            0/1     OutOfpods           0                4m16s
  test          deploy-test-84b4fdcbbd-gpkkg            0/1     OutOfpods           0                91s
  test          deploy-test-84b4fdcbbd-hbbdv            0/1     OutOfpods           0                67s
  test          deploy-test-84b4fdcbbd-j75x4            0/1     OutOfpods           0                68s
  test          deploy-test-84b4fdcbbd-s4qzz            0/1     OutOfpods           0                64s
  (...)
  

  11/03/2022

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• How to use terraform's coalesce() function

  2 min read

  
  

  Terraform's coalesce() function can com handy when we have optional arguments coming from several sources and we want to pick one using some preference.

  10/03/2022

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• Troubleshooting a Pod by changing it's command

  3 min read

  
  

  When a container in a Pod is crashing sometimes it's logs are not enough to fully understand what's going on. One way to approach this situation the command it runs to something that won't make Kubernetes restart the container: For example a sleep command

  08/03/2022

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• The activeDeadlineSeconds property on a Pod definition

  3 min read

  
  

  If we take a look all the possible properties for a Pod definition we might notice that there's one to limit the time a Pod can be running:

  apiVersion: v1
  kind: Pod
  metadata:
    name: test
  spec:
    activeDeadlineSeconds: 10
    containers:
    - args:
      - sleep
      - 24h
      image: alpine
      name: test
  

  07/03/2022

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• bestby: Refresh Pods based on it's lifetime using a label on it's definition

  3 min read

  
  

  For Kubernetes a Deployment is an object to define a Pod that is intended to permanently run on the cluster, so there's no native way to refresh it's Pods. To do so we can install the bestby controller.

  04/03/2022

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• Install Crossplane on AWS with the Jet provider

  3 min read

  
  

  To start creating resources on AWS we can choose the AWS native provider or go with the Jet provider that uses terraform's AWS provider under the hood to generate a Crossplane provider

  02/03/2022

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• Kubernetes: label vs annotation

  1 min read

  
  

  On Kubernetes there are two main ways of attaching metedata to objects un Kubernetes: Labels and Annotation.

  What's the difference? When should I choose one over the other?

  01/03/2022

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