Verify that your environment meets the network and firewall requirements.
1GbE network interface for backup data.
Port That Must Be Open
If a firewall exists between the access nodes and the Kubernetes API server endpoint, the following port must be open:
TCP: API_server_port_number incoming to your Kubernetes master server from the access nodes
Note: The default port of kube-apiserver is 443. To validate your cluster, run the following command on your API server:
The Commvault software requires a Layer 3 network connection between the access node and the Kubernetes API server endpoint on port 443 (or equivalent TLS-SSL port in the /etc/kubernetes/admin.conf file on the admin server).
The Commvault software requires access to the Docker Hub (https://hub.docker.com) to perform backup and restore operations.
To enable backups and restores of air-gapped Kubernetes clusters, see Enabling Backups and Restores of Air-Gapped Clusters for Kubernetes.
Note: Commvault downloads and uses the centos:8 image to create a temporary container during backups.