Kubernetes Pod can’t ping to any public IP and even 8.8.8.8 (not able to connect to out side word)

General Discussions
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1

From my kubernetes pod i can’t ping to outside world like google.com 8.8.8.8

Inside the pod
image

Cluster information:

Kubernetes version: 1.20.7
Cloud being used: Azure cloud (AKS)
Installation method: Manual
Host OS: Linux

core-dns logs

[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
.:53
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[INFO] plugin/reload: Running configuration MD5 = 4e7f750cf4402edf0f7938d65477a341
CoreDNS-1.8.3
linux/amd64, go1.16, 4293992b
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server
[WARNING] No files matching import glob pattern: custom/.override
[WARNING] No files matching import glob pattern: custom/.server

2

I’m not clear on if you’re manually installing Kubernetes on Azure servers or if you’re actually using AKS. Could you clarify on this?

Also what CNI are you using?

3

Thanks for the reply . From the azure portal i configured aks manually via GUI and am using AZURE-CNI
Network plugin

4

Does Azure have similar concepts to AWS where you have to setup the cloud network with things like internet gateways?

5

Yes , The network has Internet gateway attached and By the way from the Both worker node i can access internet but i can’t access internet from pod .
Is it possible to connect via zoom ?
my email id : balakrishna222111@gmail.com feel free to drop an email

6

So what comes to mind from what you’ve mentioned so far is NetworkPolicies

I wonder if AKS has any default policies in place. You can check with:

kubectl get networkpolicies -A

I also checked out the Azure CNI documentation. If you manually installed the CNI yourself and didn’t use any automation, they mention that you have to setup a masquerade rule. You can check the iptables rules on each node with:

iptables -n -L

While I’m happy to throw out some ideas here, I don’t have the availability to help out in a direct capacity over zoom. Please don’t let that discourage you from seeking further help.

7

I resolved it , it was issue with my dns

1 Like
8

what was the problem ?