Creating a dummy cluster

A dummy cluster is an imitation of a cluster that can be used to test the platform. Only fake entities — nodes and virtual machines — can be created in a dummy cluster. Dummy cluster entities mimic the behavior of the real ones, but do not perform their functions. For example, you will not be able to connect to a node in such a cluster via SSH.

To create a dummy cluster:

1. Create a cluster with any parameters in the platform interface. Save the value of the cluster id.
2. Connect to the server with the platform via SSH.

3. Connect to the DBMS:
   

   There are potential risks involved in altering a database. We do not recommend making manual edits to the database, as it can disrupt the correct operation of the platform.

   Create a backup of the platform before performing any actions with the database.

   docker exec -it mysql bash -c "mysql isp -p\$MYSQL_ROOT_PASSWORD"

4. Change the cluster type: 

   update vm_cluster set virtualization_type = "dummy" where id = <cluster_id>;

   Comments to the command

   <cluster_id> — id of the cluster

5. Exit the DBMS console: 

   \quit

6.  In the platform interface, enter Clusters. If the commands are executed successfully, the cluster type will change to Dummy.

To add a node to the dummy cluster:

1. Enter Nodes → click Connect a node.
2. In the Cluster field, select the dummy cluster. For the other parameters, specify arbitrary values.
3. Click Connect a node.