Data Domain DD9300 System Installation and Storage Expansion Guide

Configure HA

1. Verify the certificate subject name on the primary node.
   Run the following command: adminaccess certficate show

   sysadmin@dd-ha3a# adminaccess certificate show 
   Subject                      Type   Application   Valid From                 Valid Until                                                               
   --------------------------   ----   -----------   ------------------------   ------------------------
   dd-ha3a.example.com          host   https         Tue Aug  8 14:11:28 2018   Sat Aug  7 21:11:28 2022
   dd-ha3a.example.com          ca     trusted-ca    Tue Aug  8 21:04:53 2018   Mon Aug  7 21:04:53 2024 
   --------------------------   ----   -----------   ------------------------   ------------------------

2. Verify the certificate subject name on the standby node.
   Run the following command: adminaccess certficate show

   sysadmin@dd-ha3b# adminaccess certificate show 
   Subject                      Type   Application   Valid From                 Valid Until
   --------------------------   ----   -----------   ------------------------   ------------------------
   dd-ha3b.example.com          host   https         Tue Aug  8 15:11:28 2018   Sat Aug  7 22:11:28 2022
   dd-ha3b.example.com          ca     trusted-ca    Tue Aug  8 22:04:53 2018   Mon Aug  7 22:04:53 2024
   --------------------------   ----   -----------   ------------------------   ------------------------

3. Complete one of the following options:
   • If the values in the Subject column on both nodes are different, continue to Step 4.
   • If the values in the Subject column on both nodes are the same:
     1. Change the hostname of the standby node.
     2. Run the adminaccess certificate generate self-signed-cert regenerate-ca command on the standby node to generate new certificates with the new hostname.
     3. Proceed to Step 4.
4. Set the system time on both nodes. The HA configuration will fail if the time on the two nodes is more than 10 seconds apart.
   Run the following command: system set date MMDDhhmm [[CC] YY]
   NOTE After HA configuration is complete, point both nodes to an NTP or Active Directory time server.
5. Turn off DHCP for each port used for the HA interconnect on both nodes.
   Run the following command: net config <HA-interconnect-port> dhcp off
6. On the primary node, create the HA pairing.
   NOTE

   • Specify the hostname or the IP address of the standby node.
   • The ha create command will fail if one node is configured to use DHCP and the other node is configured to use static IP addresses. Both nodes must use the same method to configure IP addresses.
   Run the following command: ha create peer {<ipaddr> | <hostname>} [ha-name <ha-system-name>]
   NOTE If no value is specified for the optional ha-name parameter, the ha create command promotes the primary node hostname to be the HA system name.

   ha create peer mysystem-p1.emc.com

   This command:

   • Reboots both nodes, and completes the HA pairing when the nodes come back online.
   • Assigns node 0 the local hostname <HA-system-name>-p0.
   • Assigns node 1 the local hostname <HA-system-name>-p1.
7. When both nodes are up, verify the following information matches on both nodes:
   • Hardware model
   • Software version
8. Check the system for alerts.
   Run the following command: alerts show current
   If the system displays System is misconfigured, the SSDs were not removed from the front of the primary node. Run the enclosure show misconfiguration command to get more details.
9. Verify the HA status
   Run the following command: ha status

   HA System Name: dd-ha3a.emc.com
   HA System Status: highly available
   Node Name                  Node ID   Role      HA State
   -------------------------- --------- --------- --------
   dd-ha3a-p0.example.com 0         active    online
   dd-ha3a-p1.example.com 1         standby   online
   -------------------------- --------- --------- --------

10. On node 0, convert all data IP addresses to floating IP addresses.
    Run the following command for each IP address that needs to be converted to a floating IP address: net config <interface-name> <IP address> netmask <netmask> type floating
    NOTE The net config command with the float option is the only way to configure a floating IP address. There is no method available in DD System Manager to configure a floating IP address.

    # net config eth1a 2.2.2.1 netmask 255.255.255.0 type floating

11. Add the SSD enclosure to cache tier.
    Run the following command: storage add tier cache enclosure<enclosure number>
12. Enable the filesystem on node 0.
    Run the following command: filesys enable