Install the Siemplify server on each node.

  1. You can find the Siemplify server installer file on the /root/ folder. If it is not located on the root folder, locate and go to the folder that has it.
    You can copy the Siemplify file on both nodes where you can use WinSCP, SCP, Wget CURL or any other program for secure file sharing working on Linux. Use SCP to copy the file using the command: 
    SCP {file_directory} username@IP:/root/

    For example:

    scp D:/siemplify_installer.sh devs@172.30.203.92:/root/ (copied from windows)

  2. Navigate to the folder with the installer and set execution permission for the installation files on both nodes by using the command:
    sudo chmod +x siemplify_installer.sh
  3. Configure the primary node for the cluster and database using the command:

    sudo bash siemplify_installer.sh --run_mode ha --db_ip {db_vip} --db_port {db_port}(default:5432) --db_username {db_username} --db_password {db_password} --hostname {master_machine_hostname} --ha_host {master_machine_ip},{master_machine_hostname} --ha_host {slave_machine_ip},{slave_machine_hostname} --ha_cluster_vip {app_server_vip}

    Configuration Description
    {db_vip} IP to the primary database.
    {db_port} Port to the primary database.
    {db_username} Database username of the primary database.
    {db_password} Database password of the primary database.
    {master_machine_hostname} Primary node hostname.
    {master_machine_ip} Primary node IP.
    {slave_machine_hostname} Secondary node hostname.
    {slave_machine_ip} Secondary node IP.
    {app_server_vip} Virtual IP.

    For example:
    sudo bash siemplify_installer.sh --run_mode ha --db_ip 172.30.203.90 --db_port 5432 --db_username postgres --db_password Password1 --hostname app1 --ha_host 172.30.203.92,app1 --ha_host 172.30.203.93,app2 --ha_cluster_vip 172.30.203.94

  4. Configure the secondary node for the cluster and database using the following command:
    sudo bash siemplify_installer.sh --run_mode ha --db_ip {db_vip} --db_port {db_port}(default:5432) --db_username {db_username} --db_password {db_password} --hostname {slave_machine_hostname} --ha_host {master_machine_ip},{master_machine_hostname} --ha_host {slave_machine_ip},{slave_machine_hostname} --ha_cluster_vip {app_server_vip}
    Configuration Description
    {db_vip} IP to the replica database.
    {db_port} Port to the replica database.
    {db_username} Database username of the replica database.
    {db_password} Database password of the replica database.
    {master_machine_hostname} Primary node hostname.
    {master_machine_ip} Primary node IP.
    {slave_machine_hostname} Secondary node hostname.
    {slave_machine_ip} Secondary node IP.
    {app_server_vip} Virtual IP.

    For example:
    sudo bash siemplify_installer.sh --run_mode ha --db_ip 172.30.203.90 --db_port 5432 --db_username postgres --db_password Password1 --hostname app2 --ha_host 172.30.203.92,app1 --ha_host 172.30.203.93,app2 --ha_cluster_vip 172.30.203.94 

  5. Check the status of the cluster after installation using the command:
    pcs status

Notes:

  • After you successfully install the Siemplify server, you have two nodes and the following eight resources:
    • Cluster_VIP
    • webserver = nginx
    • Server_service
    • Connectors_service
    • ETL_service
    • Indexer_service
    • PlaybookActions_service
    • PythonExecution_service
  • It doesn’t matter which nodes is online.
  • If you connect to the VIP (virtual IP), it connects to the active node.
  • If you connect to the DB VIP, it connects to the active DB.
  • If the resources are not working, you can use the following command to reset:
    pcs resource failcount reset {RESOURCE}

For example:
pcs resource failcount reset webserver

How to switch node manually:

  1. Make sure the node is online:

    If the node is on standby, it looks like the following:
  2. We can unstandby the node with the following command:
    pcs cluster unstandby ha2.siemplify.com
  3. Once both nodes are online, set the active node on standby with the following command:
    pcs cluster standby ha1.siemplify.com

This flow causes the nodes to switch.

If you want to revert back to the previous node, make sure to set the node to unstandby.