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OCI: Podman Containers Cannot Access DNS or Internet

edited Oct 29, 2024 12:43PM in Linux

Applies to:   

Oracle Cloud Infrastructure 

Oracle Linux 8 x86-64 and later 

 

Symptoms 
 

The instance has correct DNS functionality and internet access, but podman containers running in the instance are unable to resolve internet hostnames and/or access internet resources. 

 

Cause 

In this case, the issue was caused by docker-ce also being installed and running in the instance.  

Docker-CE added a number of firewall rules via iptables which prevented regular operation of podman containers. 

 

Solution 

1 ) The first mandatory step if there is a need to use podman in Oracle Linux 8 or 9, is to disable and fully remove docker-ce packages from the system.  

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