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The first time you launch the Supervisorsupervisor, you should must initialize the cluster. To do this, do the following:

  1. Select the Serverserver's IP address from the list and click NEXT.

  2. Add the required Servers servers to the cluster. To do this, enter the IP address and click LINK.

    Note
    titleAttention!
    • All cluster Servers servers must be available to each other.
    • It is necessary to use Servers You must use servers with the same architecture (x64), OS type, and PostgreSQL version.
    • The first three Servers servers added become the master Serversmanager servers.
    • The operation of the cluster is coordinated by its master Serversmanager servers, which, in particular, take decisions to migrate nodes from one Server server to another.
    • The number of the master Servers manager servers in the cluster must be either 3 or 5.
    • The role of the master Server does not manager server doesn't affect the configuration and implementation of fault tolerance. Thus, the master manager server can be used as a fault-tolerant one (for example, to implement a 2+1 configuration).
    • If you add only two Servers are addedservers, they can be configured as 1+1—master  + backup Server server (see 1+1 cluster configuration). 

  3. If requirednecessary, you can add a user with administrator rights privileges (see Set up access to a supervisor). After the cluster is created, only this user will have access to the supervisor. Do the following:

    1. Click the ADD button.

    2. Enter access credentials and click the NEXT button.

  4. After you added add all Serversservers, click the INITIALIZE button.



This will initialize the cluster based on the selected Serversservers.

Infonote
titleNoteAttention!
  • If, during the process of cluster creation, you
added
  • add the
Server
  • servers that were already added to another cluster, they will be unavailable. If you try to initialize the cluster with unavailable
Servers
  • servers, they will be marked red, and the cluster won't be initialized.
    Image Modified
    In this case you
need to
  • must go back to the step of adding the
Servers
  • servers and add the available servers.
  • If you add servers with different Axxon One versions to the cluster, a notification about the version difference will appear on the Servers
. 
  • tab.

    In this case, for the cluster to work correctly, we recommend updating all servers to the same version of Axxon One.
  • In case of a network connection loss with a specific server within a cluster, the system initiates the migration of nodes to other servers with an available and stable network. The nodes that are left on servers with limited or absent network connection keep working locally. This allows increasing the cluster's stability and ensures its correct functioning even in conditions of an unstable or partially unavailable network.

To add other Servers servers to the cluster, do the following:
On the

...

Servers tab, click the Image Modified button.

  1. Enter the IP address of the Serverserver.

  2. If the Server server that you are adding is masteradd is the manager one, set the Manager checkboxcorresponding checkbox.

  3. Click the ADD HOST button.
  4. Add all required Serversservers.
Info
titleNote

To remove a Server server from the cluster, click and then Remove.

Note
titleAttention!

To If you want to change the IP addresses of the Server server in the cluster, do the following:

  1. Remove the Server server from the cluster.
  2. Change the IP address of the Serverserver.
  3. Add the Server server with a new IP address.