apt update (in kubernetes pod): temporary failure

iracic

Hi,

Kubernets installed manually on AWS. All worked fine until nettools exercise.

Pod works, but "apt update" command does not work:

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kubectl exec -it nettool -- apt update
Err:1 http://archive.ubuntu.com/ubuntu focal InRelease
Temporary failure resolving 'archive.ubuntu.com'

If I use directly Docker, it works correctly:

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sudo docker run -it ubuntu:latest apt update

I have checked firewall on instance and VPC settings and was unable to find the root cause of the error.

Can you help with this issue ?

Thank you,
Igor

chrispokorni

Hi @iracic,

This behavior has been encountered when running Kubernetes on AWS.
In an earlier post a solution was presented to add Google DNS 8.8.8.8 in the nettool.yaml file when working on AWS.

Regards,
-Chris

iracic

Hi Chris,

That fixed the issue.

Thank you,
Igor