Installing UFM on Bare Metal Server - High Availability Mode

Before installing UFM server software in High Availability mode, ensure that the Additional Prerequisites for UFM High Availability Installation are met.

The UFM High-Availability configuration requires a dual-link connectivity based on two separate interfaces between the two UFM HA nodes. This configuration comprises of a primary link that is exclusively reserved for DRBD operations and a secondary link designated for backup purposes. Crucially, it is imperative that communication between the servers is established in a bidirectional manner across both interfaces and validated through user-initiated testing, such as a 'ping' command, or other suitable alternatives, before HA configuration can be implemented.

1. On both servers, Install UFM Enterprise in Stand Alone (SA) mode.

   Warning

   Do not start UFM service.

2. Install the latest pcs and drbd-utils drivers on both servers.

   For Ubuntu:

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   apt install pcs pacemaker drbd-utils
           

   For CentOS/Red Hat:

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   yum install pcs pacemaker drbd84-utils kmod-drbd84
           

   OR

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   yum install pcs pacemaker drbd90-utils kmod-drbd90
           

3. Download UFM-HA latest package from this link.

   Warning

   For more information on the UFM-HA package and all installation and configuration options, please refer to UFM High-Availability User Guide

4. Extract the downloaded UFM-HA package on both servers under /tmp/.

5. Go to the directory you extracted /tmp/ufm_ha_XXX and run the installation script. For example, if your DRBD partition is /dev/sda5 run:

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   ./install.sh -l /opt/ufm/files/ -d /dev/sda5 -p enterprise
           

6. Configure the HA cluster. There are two methods:

• Configure HA with SSH Trust - Requires passwordless SSH connection between the servers.

• Configure HA without SSH Trust - Does not require passwordless SSH connection between the servers, but asks you to run configuration commands on both servers.

Configure HA with SSH Trust

1. 1. On the master server only, configure the HA nodes. To do so, from /tmp, run the configure_ha_nodes.sh command as shown in the below example

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      configure_ha_nodes.sh \
      --cluster-password 12345678 \
      --local-primary-ip 10.10.50.1 \
      --peer-primary-ip 10.10.50.2 \
      --local-secondary-ip 192.168.10.1 \
      --peer-secondary-ip 192.168.10.2 \
      --no-vip 
              

      Warning

      The script configure_ha_nodes.sh is is located under /usr/local/bin/, therefore, by default, you do not need to use the full path to run it.

      Warning

      The --cluster-password must be at least 8 characters long.

      Warning

      To set up a Virtual IP for UFM and gain access to UFM through this IP, regardless of which server is running UFM, you may employ the --no-vip OR --virtual-ip command and provide an IP address as an argument. This can be achieved by navigating to https://<Virtual-IP>/ufm on your web browser.

      Warning

      When using back-to-back ports with local IP addresses for HA sync interfaces, ensure that you add your IP addresses and hostnames to the /etc/hosts file. This is needed to allow the HA configuration to resolve hostnames correctly based on the IP addresses you are using.

      Warning

      configure_ha_nodes.sh requires SSH connection to the standby server. If SSH trust is not configured, then you are prompted to enter the SSH password of the standby server during configuration runtime

   2. Depending on the size of your partition, wait for the configuration process to complete and DRBD sync to finish.

Configure HA without SSH Trust

If you cannot establish an SSH trust between your HA servers, you can use ufm_ha_cluster directly to configure HA. To configure HA, follow the below instructions:

1. 1. [On Standby Server] Run the following command to configure Standby Server:

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      ufm_ha_cluster config -r standby \
      --local-primary-ip 10.10.50.1 \
      --peer-primary-ip 10.10.50.2 \
      --local-secondary-ip 192.168.10.1 \
      --peer-secondary-ip 192.168.10.2 \
      --hacluster-pwd 123456789 \
      --no-vip
              

   2. [On Master Server] Run the following command to configure Master Server:

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      ufm_ha_cluster config -r master --local-primary-ip 10.10.50.1 \
      --peer-primary-ip 10.10.50.2 \
      --local-secondary-ip 192.168.10.1 \
      --peer-secondary-ip 192.168.10.2 \
      --hacluster-pwd 123456789 \
      --no-vip
              

      You must wait until after configuration for DRBD sync to finish, depending on the size of your partition. To check the DRBD sync status, run:

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      ufm_ha_cluster status 
              

Starting HA Cluster

• To start UFM HA cluster:

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   ufm_ha_cluster start 
          

• To check UFM HA cluster status:

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  ufm_ha_cluster status 
          

Stopping UFM HA cluster:

            

            
 ufm_ha_cluster stop