Azure Arc Agent Heartbeat Connection Failure

Problem

The Azure Arc agent fails to connect to the Azure service, resulting in heartbeat failures.

Environment

Azure cloud environment with Azure Arc-enabled servers.

Cause

Network connectivity issues, incorrect agent configuration, firewall settings blocking necessary ports, or service outages with Azure.

Steps

1. 1. Verify that the Azure Arc agent is installed and running on the target machine.
2. 2. Check the network connectivity from the target machine to Azure endpoints using ping and traceroute commands.
3. 3. Ensure that the machine meets the prerequisites for Azure Arc, including supported operating systems.
4. 4. Validate that the agent configuration is correct in the Azure portal.
5. 5. Confirm that necessary network ports (443, 5671, and others as needed for Azure services) are open in any firewalls.
6. 6. Review the agent logs located in the install directory for any specific error messages or warnings.
7. 7. Restart the Azure Arc agent service and monitor for any connection attempts.
8. 8. If using a corporate VPN or proxy, ensure the necessary configurations are in place to allow Azure communication.
9. 9. Check the Azure status page for any service outages that might affect connectivity.

Command

az connectedmachine show --resource-group <resource-group-name> --name <machine-name>

Edge Cases

• If the agent was configured to use a specific Azure region, ensure that the region is operational.
• In cases where the target machine is behind a proxy or firewall, ensure additional proxy settings are correctly configured.

Summary

Heartbeats from the Azure Arc agent may fail due to a variety of connectivity issues. By following the outlined troubleshooting steps, administrators can verify network settings, agent configurations, and ensure that required services are functioning properly.