ISPmanager 5 Business is a control panel that can be used for managing multiple servers (cluster). The panel can manage data located on both local and remote servers (cluster nodes). ISPmanager 5 Node is installed on each cluster node for managing cluster nodes through remote calls. You can manage a local node in the same as any other node except for adding a new cluster node.
The system completes the following steps to add a cluster node
Data synchronization starts first and performs the following operations:
As we wrote above, ISPmanager 5 Business sends remote calls to the control panel ISPmanager 5 Node installed on each cluster node. The control panel manages two main types of data:
Examples of user data are "Web-domains", "Domain names", "Mail domains", etc.
A cluster node where specific user data will be located is selected depending on a data role.
ISPmanager 5 Business locates the cluster node where user data are located, sends user requests to ISPmanager 5 Node installed on the same node, receives the reply and generated the result for the user. Thus, a specific cluster node manages user data by proxying user requests to the control panel.
A different scheme is used for managing system data, such as "Firewall", "Scheduler", "Whitelist", etc.
Such data must be identical on all the cluster nodes. A distributed query is sent to all the nodes meeting a specific criterion (e.g., active mail server role for a "Blacklist").
Before executing the query, certain conditions are checked, for example, the percentage of "Ready" cluster nodes must be greater than the value specified in the Policy settings. Then the query will be executed on the corresponding cluster nodes. If the attempt fails, the changes won't be applied in ISPmanager 5 Business. If the query is executed successfully, data de-synchronization will be registered.
The corresponding data lists will be synchronized with the cluster node using the synchronization mechanisms .