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

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

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

  3. If necessary, you can add a user with administrator 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 add all servers, click the INITIALIZE button.



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Note
titleAttention!
  • If, during the process of cluster creation, you add the servers that were already added to another cluster, they will be unavailable. If you try to initialize the cluster with unavailable servers, they will be marked red, and the cluster won't be initialized.
    Image Removed
    In  In this case you must go back to the step of adding the servers and add the available servers.
  • If you add servers with different Axxon One versions versions to the cluster, a notification about  the following version difference mismatch notification will appear on the the Servers tab—Servers tab.Some versions don't match. Please update!
    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.

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