Related

Product Managed Kubernetes on DigitalOcean Product
Will kubernetes have autoscaling by default? Question Question
Firewall blocks hostPort Question Question

Question

I can no longer connect to external URLs after cluster upgrade

Posted January 14, 2020 231 views
Kubernetes

I upgraded my k8 cluster a few days ago and since then I have not been able to connect to external URLs.

I am getting a ‘connect timed out’ error when trying to load an external site and locally this same code is running properly.

Do I need to do something special to allow my pod to communicate externally? I messed around with some network policy stuff but that didn’t seem to help.

Could it be related to this change/fix?
1.16.2-do.2 (2020-01-10) :: Kubernetes Changelog

Add a comment
mattjs
By:
mattjs
Add a comment
1 comment
  • jkwiatkoski January 16, 2020
    Reply Report

    Do you see all the pods in your kubesystem running healthy? I would namely look for coredns, kube-proxy, and cilium. If not I would ensure they have enough resources to run reliably and try kicking the pods again. Is the connection issue happening from all nodes?

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

×
2 answers
mattjs January 16, 2020

kube-system all look healthy. This is happening in a cronjob and it has failed on each run/pod consistently since the cluster upgrade on Monday evening. Resources utilization on the cluster also looks good.

Reply Report
mattjs January 16, 2020

Ok to add more info this is only happening when trying to connect to sites that are running on the same cluster.

I run a test pod like this

kubectl run -it --rm --restart=Never alpine --image=alpine sh

And wget google.com works while wget brownbear.tech hangs.

Locally on my machine wget brownbear.tech works as expected along with following the HSTS policy to redirect to https.

It seems like the issue is a networking issue where it cannot properly route a URL which is also hosted on the cluster. For one of my sites hosted on a different cluster I do not see the issue making the connection.

Reply Report
Submit an Answer

Related

Looking for something else?

Ask a new question Search for more help