- Plesk Onyx for Linux
A service node periodically switches to "Unavailable" state and then reverts back to the "Activated" state upon the next synchronization with a management node.
Unable to add a new service node.
The following error message might appear on the management node in the logfile /var/log/plesk/panel.log:
CONFIG_TEXT: WARN [extension/plesk-multi-server] Service node API-RPC is not available: IP address=192.0.2.2. Details: Error in cURL request: Connection timed out after 10001 milliseconds
The connection from the management node to the service node on TCP port 8443 is blocked by a firewall.
Allow port 8443 for incoming connections from the management node IP address on the service node and/or intermediate firewall.