During the installation or upgrade of your cluster, KET must be able to pull packages and container images from the Internet (or your local infrastructure if performing a disconnected installation).
When your nodes are behind a proxy server, the proxy's information must be set in the plan file so that KET can send requests through the proxy.
When the proxy configuration is entered in the plan file, KET will do the following:
- Use the proxy when downloading software packages or container images
- Use the proxy when setting up Helm, as it needs to download Chart metadata
- Configure the docker daemon to use the proxy
Additionally, KET will always set the hostnames, IPs and internal IPs of all nodes
in the no_proxy environment variable. This is to prevent any node-to-node communication
from going through the proxy.