Expanding a four-node MetroCluster IP configuration to an eight-node configuration

Contributors netapp-thomi netapp-martyh netapp-aherbin Download PDF of this page

Starting with ONTAP 9.9.1, you can add four new nodes to the MetroCluster IP configuration as a second DR group. This creates an eight-node MetroCluster configuration.

Before you begin
  • The old and new nodes must be running the same version of ONTAP.

  • You must ensure that the old and new platform models are supported for platform mixing.

  • You must ensure that the old and new platform models are both supported by the IP switches.

  • The new nodes must have enough storage to accommodate the data of the old nodes, along with adequate disks for root aggregates and spare disks.

Example naming in this procedure

This procedure uses example names throughout to identify the DR groups, nodes, and switches involved.

DR groups

cluster_A at site_A

cluster_B at site_B

dr_group_1-old

  • node_A_1-old

  • node_A_2-old

  • node_B_1-old

  • node_B_2-old

dr_group_2-new

  • node_A_3-new

  • node_A_4-new

  • node_B_3-new

  • node_B_4-new

Sending a custom AutoSupport message prior to maintenance

Before performing the maintenance, you should issue an AutoSupport message to notify NetApp technical support that maintenance is underway. Informing technical support that maintenance is underway prevents them from opening a case on the assumption that a disruption has occurred.

About this task

This task must be performed on each MetroCluster site.

Steps
  1. To prevent automatic support case generation, send an Autosupport message to indicate the upgrade is underway.

    1. Issue the following command:

      system node autosupport invoke -node * -type all -message "MAINT=10h Upgrading old-model to new-model"

      This example specifies a 10 hour maintenance window. You might want to allow additional time, depending on your plan.

      If the maintenance is completed before the time has elapsed, you can invoke an AutoSupport message indicating the end of the maintenance period:

      system node autosupport invoke -node * -type all -message MAINT=end

    2. Repeat the command on the partner cluster.

Verifying the health of the MetroCluster configuration

You must verify the health and connectivity of the MetroCluster configuration prior to performing the transition

Steps
  1. Verify the operation of the MetroCluster configuration in ONTAP:

    1. Check whether the system is multipathed:

      node run -node node-name sysconfig -a

    2. Check for any health alerts on both clusters:

      system health alert show

    3. Confirm the MetroCluster configuration and that the operational mode is normal:

      metrocluster show

    4. Perform a MetroCluster check:

      metrocluster check run

    5. Display the results of the MetroCluster check:

      metrocluster check show

    6. Run Config Advisor.

    7. After running Config Advisor, review the tool’s output and follow the recommendations in the output to address any issues discovered.

  2. Verify that the cluster is healthy:

    cluster show -vserver Cluster

    cluster_A::> cluster show -vserver Cluster
    Node           Health  Eligibility   Epsilon
    -------------- ------  -----------   -------
    node_A_1    true    true          false
    node_A_2    true    true          false
    
    cluster_A::>
  3. Verify that all cluster ports are up:

    network port show -ipspace cluster

    cluster_A::> network port show -ipspace cluster
    
    Node: node_A_1-old
    
                                                      Speed(Mbps) Health
    Port      IPspace      Broadcast Domain Link MTU  Admin/Oper  Status
    --------- ------------ ---------------- ---- ---- ----------- --------
    e0a       Cluster      Cluster          up   9000  auto/10000 healthy
    e0b       Cluster      Cluster          up   9000  auto/10000 healthy
    
    Node: node_A_2-old
    
                                                      Speed(Mbps) Health
    Port      IPspace      Broadcast Domain Link MTU  Admin/Oper  Status
    --------- ------------ ---------------- ---- ---- ----------- --------
    e0a       Cluster      Cluster          up   9000  auto/10000 healthy
    e0b       Cluster      Cluster          up   9000  auto/10000 healthy
    
    4 entries were displayed.
    
    cluster_A::>
  4. Verify that all cluster LIFs are up and operational:

    network interface show -vserver Cluster

    Each cluster LIF should display true for Is Home and have a Status Admin/Oper of up/up

    cluster_A::> network interface show -vserver cluster
    
                Logical      Status     Network          Current       Current Is
    Vserver     Interface  Admin/Oper Address/Mask       Node          Port    Home
    ----------- ---------- ---------- ------------------ ------------- ------- -----
    Cluster
                node_A_1-old_clus1
                           up/up      169.254.209.69/16  node_A_1   e0a     true
                node_A_1-old_clus2
                           up/up      169.254.49.125/16  node_A_1   e0b     true
                node_A_2-old_clus1
                           up/up      169.254.47.194/16  node_A_2   e0a     true
                node_A_2-old_clus2
                           up/up      169.254.19.183/16  node_A_2   e0b     true
    
    4 entries were displayed.
    
    cluster_A::>
  5. Verify that auto-revert is enabled on all cluster LIFs:

    network interface show -vserver Cluster -fields auto-revert

    cluster_A::> network interface show -vserver Cluster -fields auto-revert
    
              Logical
    Vserver   Interface     Auto-revert
    --------- ------------- ------------
    Cluster
               node_A_1-old_clus1
                            true
               node_A_1-old_clus2
                            true
               node_A_2-old_clus1
                            true
               node_A_2-old_clus2
                            true
    
        4 entries were displayed.
    
    cluster_A::>

Removing the configuration from monitoring applications

If the existing configuration is monitored with the MetroCluster Tiebreaker software, the ONTAP Mediator or other third-party applications (for example, ClusterLion) that can initiate a switchover, you must remove the MetroCluster configuration from the monitoring software prior to upgrade.

Steps
  1. Remove the existing MetroCluster configuration from Tiebreaker, Mediator, or other software that can initiate switchover.

    If you are using…​

    Use this procedure…​

    Tiebreaker

    Removing MetroCluster Configurations in the MetroCluster Tiebreaker Installation and Configuration Guide

    Mediator

    Issue the following command from the ONTAP prompt:

    metrocluster configuration-settings mediator remove

    Third-party applications

    Refer to the product documentation.

  2. Remove the existing MetroCluster configuration from any third-party application that can initiate switchover.

    Refer to the documentation for the application.

Preparing the new controller modules

You must prepare the four new MetroCluster nodes and install the correct ONTAP version.

About this task

This task must be performed on each of the new nodes:

  • node_A_3-new

  • node_A_4-new

  • node_B_3-new

  • node_B_4-new

In these steps, you clear the configuration on the nodes and clear the mailbox region on new drives.

Steps
  1. Rack the new controllers.

  2. Cable the new MetroCluster IP nodes to the IP switches as shown in the MetroCluster Installation and Configuration Guide.

  3. Configure the MetroCluster IP nodes using the following sections of the MetroCluster Installation and Configuration Guide.

  4. From Maintenance mode, issue the halt command to exit Maintenance mode, and then issue the boot_ontap command to boot the system and get to cluster setup.

    Do not complete the cluster wizard or node wizard at this time.

Joining the new nodes to the clusters

You must add the four new MetroCluster IP nodes to the existing MetroCluster configuration.

About this task

You must perform this task on both clusters.

Steps
  1. Add the new MetroCluster IP nodes to the existing MetroCluster configuration.

    1. Join the first new MetroCluster IP node (node_A_1-new) to the existing MetroCluster IP configuration.

      Welcome to the cluster setup wizard.
      
      You can enter the following commands at any time:
        "help" or "?" - if you want to have a question clarified,
        "back" - if you want to change previously answered questions, and
        "exit" or "quit" - if you want to quit the cluster setup wizard.
           Any changes you made before quitting will be saved.
      
      You can return to cluster setup at any time by typing "cluster setup".
      To accept a default or omit a question, do not enter a value.
      
      This system will send event messages and periodic reports to NetApp Technical
      Support. To disable this feature, enter
      autosupport modify -support disable
      within 24 hours.
      
      Enabling AutoSupport can significantly speed problem determination and
      resolution, should a problem occur on your system.
      For further information on AutoSupport, see:
      http://support.netapp.com/autosupport/
      
      Type yes to confirm and continue {yes}: yes
      
      Enter the node management interface port [e0M]: 172.17.8.93
      
      172.17.8.93 is not a valid port.
      
      The physical port that is connected to the node management network. Examples of
      node management ports are "e4a" or "e0M".
      
      You can type "back", "exit", or "help" at any question.
      
      
      Enter the node management interface port [e0M]:
      Enter the node management interface IP address: 172.17.8.93
      Enter the node management interface netmask: 255.255.254.0
      Enter the node management interface default gateway: 172.17.8.1
      A node management interface on port e0M with IP address 172.17.8.93 has been created.
      
      Use your web browser to complete cluster setup by accessing https://172.17.8.93
      
      Otherwise, press Enter to complete cluster setup using the command line
      interface:
      
      
      Do you want to create a new cluster or join an existing cluster? {create, join}:
      join
      
      
      Existing cluster interface configuration found:
      
      Port    MTU     IP              Netmask
      e0c     9000    169.254.148.217 255.255.0.0
      e0d     9000    169.254.144.238 255.255.0.0
      
      Do you want to use this configuration? {yes, no} [yes]: yes
      .
      .
      .
    2. Join the second new MetroCluster IP node (node_A_2-new) to the existing MetroCluster IP configuration.

  2. Repeat these steps to join node_B_1-new and node_B_2-new to cluster_B.

Configuring intercluster LIFs, creating the MetroCluster interfaces, and mirroring root aggregates

You must create cluster peering LIFs, create the MetroCluster interfaces on the new MetroCluster IP nodes.

About this task

The home port used in the examples are platform-specific. You should use the appropriate home port specific to MetroCluster IP node platform.

Steps
  1. On the new MetroCluster IP nodes, configure the intercluster LIFs using the procedures in the MetroCluster IP Installation and Configuration Guide.

  2. On each site, verify that cluster peering is configured:

    cluster peer show

    The following example shows the cluster peering configuration on cluster_A:

    cluster_A:> cluster peer show
    Peer Cluster Name         Cluster Serial Number Availability   Authentication
    ------------------------- --------------------- -------------- --------------
    cluster_B                 1-80-000011           Available      ok

    The following example shows the cluster peering configuration on cluster_B:

    cluster_B:> cluster peer show
    Peer Cluster Name         Cluster Serial Number Availability   Authentication
    ------------------------- --------------------- -------------- --------------
    cluster_A                 1-80-000011           Available      ok
    cluster_B::>
  3. Create the DR group for the MetroCluster IP nodes:

    metrocluster configuration-settings dr-group create -partner-cluster

    For more information on the MetroCluster configuration settings and connections, see the MetroCluster IP Installation and Configuration Guide.

    cluster_A::> metrocluster configuration-settings dr-group create -partner-cluster
    cluster_B -local-node node_A_1-new -remote-node node_B_1-new
    [Job 259] Job succeeded: DR Group Create is successful.
    cluster_A::>
  4. Verify that the DR group was created.

    metrocluster configuration-settings dr-group show

    cluster_A::> metrocluster configuration-settings dr-group show
    
    DR Group ID Cluster                    Node               DR Partner Node
    ----------- -------------------------- ------------------ ------------------
    1           cluster_A
                                           node_A_1-old        node_B_1-old
                                           node_A_2-old        node_B_2-old
                cluster_B
                                           node_B_1-old        node_A_1-old
                                           node_B_2-old        node_A_2-old
    2           cluster_A
                                           node_A_1-new        node_B_1-new
                                           node_A_2-new        node_B_2-new
                cluster_B
                                           node_B_1-new        node_A_1-new
                                           node_B_2-new        node_A_2-new
    8 entries were displayed.
    
    cluster_A::>
  5. Configure the MetroCluster IP interfaces for the newly joined MetroCluster IP nodes:

    metrocluster configuration-settings interface create -cluster-name

    Note
    • Starting with ONTAP 9.8, certain platforms use a VLAN for the MetroCluster IP interface. By default, each of the two ports use a different VLAN: 10 and 20. You can also specify a different (non-default) VLAN higher than 100 (between 101 and 4095) using the -vlan-id parameter in the metrocluster configuration-settings interface create command.

    • Starting with ONTAP 9.9.1, if you are using a layer 3 configuration, you must also specify the -gateway parameter when creating MetroCluster IP interfaces. Refer to Considerations for layer 3 wide-area networks.

    The following platform models use VLANs and allow configuration of a non-default VLAN ID.

    AFF platforms

    FAS platforms

    • AFF A220

    • AFF A250

    • AFF A400

    • FAS2750

    • FAS500f

    • FAS8300

    • FAS8700

    Note You can configure the MetroCluster IP interfaces from either cluster. Also, starting with ONTAP 9.1.1, if you are using a layer 3 configuration, you must also specify the -gateway parameter to create MetroCluster IP interfaces. Refer to Considerations for layer 3 wide-area networks.
    cluster_A::> metrocluster configuration-settings interface create -cluster-name cluster_A -home-node node_A_1-new -home-port e1a -address 172.17.26.10 -netmask 255.255.255.0
    [Job 260] Job succeeded: Interface Create is successful.
    
    cluster_A::> metrocluster configuration-settings interface create -cluster-name cluster_A -home-node node_A_1-new -home-port e1b -address 172.17.27.10 -netmask 255.255.255.0
    [Job 261] Job succeeded: Interface Create is successful.
    
    cluster_A::> metrocluster configuration-settings interface create -cluster-name cluster_A -home-node node_A_2-new -home-port e1a -address 172.17.26.11 -netmask 255.255.255.0
    [Job 262] Job succeeded: Interface Create is successful.
    
    cluster_A::> :metrocluster configuration-settings interface create -cluster-name cluster_A -home-node node_A_2-new -home-port e1b -address 172.17.27.11 -netmask 255.255.255.0
    [Job 263] Job succeeded: Interface Create is successful.
    
    cluster_A::> metrocluster configuration-settings interface create -cluster-name cluster_B -home-node node_B_1-new -home-port e1a -address 172.17.26.12 -netmask 255.255.255.0
    [Job 264] Job succeeded: Interface Create is successful.
    
    cluster_A::> metrocluster configuration-settings interface create -cluster-name cluster_B -home-node node_B_1-new -home-port e1b -address 172.17.27.12 -netmask 255.255.255.0
    [Job 265] Job succeeded: Interface Create is successful.
    
    cluster_A::> metrocluster configuration-settings interface create -cluster-name cluster_B -home-node node_B_2-new -home-port e1a -address 172.17.26.13 -netmask 255.255.255.0
    [Job 266] Job succeeded: Interface Create is successful.
    
    cluster_A::> metrocluster configuration-settings interface create -cluster-name cluster_B -home-node node_B_2-new -home-port e1b -address 172.17.27.13 -netmask 255.255.255.0
    [Job 267] Job succeeded: Interface Create is successful.
  1. Verify the MetroCluster IP interfaces are created:

    metrocluster configuration-settings interface show

    cluster_A::>metrocluster configuration-settings interface show
    
    DR                                                                    Config
    Group Cluster Node    Network Address Netmask         Gateway         State
    ----- ------- ------- --------------- --------------- --------------- ---------
    1     cluster_A
                 node_A_1-old
                     Home Port: e1a
                          172.17.26.10    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.27.10    255.255.255.0   -               completed
                  node_A_2-old
                     Home Port: e1a
                          172.17.26.11    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.27.11    255.255.255.0   -               completed
          cluster_B
                 node_B_1-old
                     Home Port: e1a
                          172.17.26.13    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.27.13    255.255.255.0   -               completed
                  node_B_1-old
                     Home Port: e1a
                          172.17.26.12    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.27.12    255.255.255.0   -               completed
    2     cluster_A
                 node_A_3-new
                     Home Port: e1a
                          172.17.28.10    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.29.10    255.255.255.0   -               completed
                  node_A_3-new
                     Home Port: e1a
                          172.17.28.11    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.29.11    255.255.255.0   -               completed
          cluster_B
                 node_B_3-new
                     Home Port: e1a
                          172.17.28.13    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.29.13    255.255.255.0   -               completed
                  node_B_3-new
                     Home Port: e1a
                          172.17.28.12    255.255.255.0   -               completed
                     Home Port: e1b
                          172.17.29.12    255.255.255.0   -               completed
    8 entries were displayed.
    
    cluster_A>
  2. Connect the MetroCluster IP interfaces:

    metrocluster configuration-settings connection connect

    Note This command might take several minutes to complete.
    cluster_A::> metrocluster configuration-settings connection connect
    
    cluster_A::>
  3. Verify the connections are properly established: metrocluster configuration-settings connection show

    cluster_A::> metrocluster configuration-settings connection show
    
    DR                    Source          Destination
    Group Cluster Node    Network Address Network Address Partner Type Config State
    ----- ------- ------- --------------- --------------- ------------ ------------
    1     cluster_A
                  node_A_1-old
                     Home Port: e1a
                          172.17.28.10    172.17.28.11    HA Partner   completed
                     Home Port: e1a
                          172.17.28.10    172.17.28.12    DR Partner   completed
                     Home Port: e1a
                          172.17.28.10    172.17.28.13    DR Auxiliary completed
                     Home Port: e1b
                          172.17.29.10    172.17.29.11    HA Partner   completed
                     Home Port: e1b
                          172.17.29.10    172.17.29.12    DR Partner   completed
                     Home Port: e1b
                          172.17.29.10    172.17.29.13    DR Auxiliary completed
                  node_A_2-old
                     Home Port: e1a
                          172.17.28.11    172.17.28.10    HA Partner   completed
                     Home Port: e1a
                          172.17.28.11    172.17.28.13    DR Partner   completed
                     Home Port: e1a
                          172.17.28.11    172.17.28.12    DR Auxiliary completed
                     Home Port: e1b
                          172.17.29.11    172.17.29.10    HA Partner   completed
                     Home Port: e1b
                          172.17.29.11    172.17.29.13    DR Partner   completed
                     Home Port: e1b
                          172.17.29.11    172.17.29.12    DR Auxiliary completed
    
    DR                    Source          Destination
    Group Cluster Node    Network Address Network Address Partner Type Config State
    ----- ------- ------- --------------- --------------- ------------ ------------
    1     cluster_B
                  node_B_2-old
                     Home Port: e1a
                          172.17.28.13    172.17.28.12    HA Partner   completed
                     Home Port: e1a
                          172.17.28.13    172.17.28.11    DR Partner   completed
                     Home Port: e1a
                          172.17.28.13    172.17.28.10    DR Auxiliary completed
                     Home Port: e1b
                          172.17.29.13    172.17.29.12    HA Partner   completed
                     Home Port: e1b
                          172.17.29.13    172.17.29.11    DR Partner   completed
                     Home Port: e1b
                          172.17.29.13    172.17.29.10    DR Auxiliary completed
                  node_B_1-old
                     Home Port: e1a
                          172.17.28.12    172.17.28.13    HA Partner   completed
                     Home Port: e1a
                          172.17.28.12    172.17.28.10    DR Partner   completed
                     Home Port: e1a
                          172.17.28.12    172.17.28.11    DR Auxiliary completed
                     Home Port: e1b
                          172.17.29.12    172.17.29.13    HA Partner   completed
                     Home Port: e1b
                          172.17.29.12    172.17.29.10    DR Partner   completed
                     Home Port: e1b
                          172.17.29.12    172.17.29.11    DR Auxiliary completed
    
    DR                    Source          Destination
    Group Cluster Node    Network Address Network Address Partner Type Config State
    ----- ------- ------- --------------- --------------- ------------ ------------
    2     cluster_A
                  node_A_1-new**
                     Home Port: e1a
                          172.17.26.10    172.17.26.11    HA Partner   completed
                     Home Port: e1a
                          172.17.26.10    172.17.26.12    DR Partner   completed
                     Home Port: e1a
                          172.17.26.10    172.17.26.13    DR Auxiliary completed
                     Home Port: e1b
                          172.17.27.10    172.17.27.11    HA Partner   completed
                     Home Port: e1b
                          172.17.27.10    172.17.27.12    DR Partner   completed
                     Home Port: e1b
                          172.17.27.10    172.17.27.13    DR Auxiliary completed
                  node_A_2-new
                     Home Port: e1a
                          172.17.26.11    172.17.26.10    HA Partner   completed
                     Home Port: e1a
                          172.17.26.11    172.17.26.13    DR Partner   completed
                     Home Port: e1a
                          172.17.26.11    172.17.26.12    DR Auxiliary completed
                     Home Port: e1b
                          172.17.27.11    172.17.27.10    HA Partner   completed
                     Home Port: e1b
                          172.17.27.11    172.17.27.13    DR Partner   completed
                     Home Port: e1b
                          172.17.27.11    172.17.27.12    DR Auxiliary completed
    
    DR                    Source          Destination
    Group Cluster Node    Network Address Network Address Partner Type Config State
    ----- ------- ------- --------------- --------------- ------------ ------------
    2     cluster_B
                  node_B_2-new
                     Home Port: e1a
                          172.17.26.13    172.17.26.12    HA Partner   completed
                     Home Port: e1a
                          172.17.26.13    172.17.26.11    DR Partner   completed
                     Home Port: e1a
                          172.17.26.13    172.17.26.10    DR Auxiliary completed
                     Home Port: e1b
                          172.17.27.13    172.17.27.12    HA Partner   completed
                     Home Port: e1b
                          172.17.27.13    172.17.27.11    DR Partner   completed
                     Home Port: e1b
                          172.17.27.13    172.17.27.10    DR Auxiliary completed
                  node_B_1-new
                     Home Port: e1a
                          172.17.26.12    172.17.26.13    HA Partner   completed
                     Home Port: e1a
                          172.17.26.12    172.17.26.10    DR Partner   completed
                     Home Port: e1a
                          172.17.26.12    172.17.26.11    DR Auxiliary completed
                     Home Port: e1b
                          172.17.27.12    172.17.27.13    HA Partner   completed
                     Home Port: e1b
                          172.17.27.12    172.17.27.10    DR Partner   completed
                     Home Port: e1b
                          172.17.27.12    172.17.27.11    DR Auxiliary completed
    48 entries were displayed.
    
    cluster_A::>
  4. Verify disk auto-assignment and partitioning:

    disk show -pool Pool1

    cluster_A::> disk show -pool Pool1
                         Usable           Disk    Container   Container
    Disk                   Size Shelf Bay Type    Type        Name      Owner
    ---------------- ---------- ----- --- ------- ----------- --------- --------
    1.10.4                    -    10   4 SAS     remote      -         node_B_2
    1.10.13                   -    10  13 SAS     remote      -         node_B_2
    1.10.14                   -    10  14 SAS     remote      -         node_B_1
    1.10.15                   -    10  15 SAS     remote      -         node_B_1
    1.10.16                   -    10  16 SAS     remote      -         node_B_1
    1.10.18                   -    10  18 SAS     remote      -         node_B_2
    ...
    2.20.0              546.9GB    20   0 SAS     aggregate   aggr0_rha1_a1 node_a_1
    2.20.3              546.9GB    20   3 SAS     aggregate   aggr0_rha1_a2 node_a_2
    2.20.5              546.9GB    20   5 SAS     aggregate   rha1_a1_aggr1 node_a_1
    2.20.6              546.9GB    20   6 SAS     aggregate   rha1_a1_aggr1 node_a_1
    2.20.7              546.9GB    20   7 SAS     aggregate   rha1_a2_aggr1 node_a_2
    2.20.10             546.9GB    20  10 SAS     aggregate   rha1_a1_aggr1 node_a_1
    ...
    43 entries were displayed.
    
    cluster_A::>
  5. Mirror the root aggregates:

    storage aggregate mirror -aggregate aggr0_node_A_1-new

    Note You must complete this step on each MetroCluster IP node.
    cluster_A::> aggr mirror -aggregate aggr0_node_A_1-new
    
    Info: Disks would be added to aggregate "aggr0_node_A_1-new"on node "node_A_1-new"
          in the following manner:
    
          Second Plex
    
            RAID Group rg0, 3 disks (block checksum, raid_dp)
                                                                Usable Physical
              Position   Disk                      Type           Size     Size
              ---------- ------------------------- ---------- -------- --------
              dparity    4.20.0                    SAS               -        -
              parity     4.20.3                    SAS               -        -
              data       4.20.1                    SAS         546.9GB  558.9GB
    
          Aggregate capacity available forvolume use would be 467.6GB.
    
    Do you want to continue? {y|n}: y
    
    cluster_A::>
  6. Verify that the root aggregates are mirrored:

    storage aggregate show

    cluster_A::> aggr show
    
    Aggregate     Size Available Used% State   #Vols  Nodes            RAID Status
    --------- -------- --------- ----- ------- ------ ---------------- ------------
    aggr0_node_A_1-old
               349.0GB   16.84GB   95% online       1 node_A_1-old      raid_dp,
                                                                       mirrored,
                                                                       normal
    aggr0_node_A_2-old
               349.0GB   16.84GB   95% online       1 node_A_2-old      raid_dp,
                                                                       mirrored,
                                                                       normal
    aggr0_node_A_1-new
               467.6GB   22.63GB   95% online       1 node_A_1-new      raid_dp,
                                                                       mirrored,
                                                                       normal
    aggr0_node_A_2-new
               467.6GB   22.62GB   95% online       1 node_A_2-new      raid_dp,
                                                                       mirrored,
                                                                       normal
    aggr_data_a1
                1.02TB    1.01TB    1% online       1 node_A_1-old      raid_dp,
                                                                       mirrored,
                                                                       normal
    aggr_data_a2
                1.02TB    1.01TB    1% online       1 node_A_2-old      raid_dp,
                                                                       mirrored,

Finalizing the addition of the new nodes

You must incorporate the new DR group into the MetroCluster configuration and create mirrored data aggregates on the new nodes.

Steps
  1. Create mirrored data aggregates on each of the new MetroCluster nodes:

    storage aggregate create -aggregate aggregate-name -node node-name -diskcount no-of-disks -mirror true

    Note You must create at least one mirrored data aggregate per site. It is recommended to have two mirrored data aggregates per site on MetroCluster IP nodes to host the MDV volumes, however a single aggregate per site is supported (but not recommended). It is support that one site of the MetroCluster has a single mirrored data aggregate and the other site has more than one mirrored data aggregate.

    The following example shows the creation of an aggregate on node_A_1-new.

    cluster_A::> storage aggregate create -aggregate data_a3 -node node_A_1-new -diskcount 10 -mirror t
    
    Info: The layout for aggregate "data_a3" on node "node_A_1-new" would be:
    
          First Plex
    
            RAID Group rg0, 5 disks (block checksum, raid_dp)
                                                                Usable Physical
              Position   Disk                      Type           Size     Size
              ---------- ------------------------- ---------- -------- --------
              dparity    5.10.15                   SAS               -        -
              parity     5.10.16                   SAS               -        -
              data       5.10.17                   SAS         546.9GB  547.1GB
              data       5.10.18                   SAS         546.9GB  558.9GB
              data       5.10.19                   SAS         546.9GB  558.9GB
    
          Second Plex
    
            RAID Group rg0, 5 disks (block checksum, raid_dp)
                                                                Usable Physical
              Position   Disk                      Type           Size     Size
              ---------- ------------------------- ---------- -------- --------
              dparity    4.20.17                   SAS               -        -
              parity     4.20.14                   SAS               -        -
              data       4.20.18                   SAS         546.9GB  547.1GB
              data       4.20.19                   SAS         546.9GB  547.1GB
              data       4.20.16                   SAS         546.9GB  547.1GB
    
          Aggregate capacity available for volume use would be 1.37TB.
    
    Do you want to continue? {y|n}: y
    [Job 440] Job succeeded: DONE
    
    cluster_A::>
  2. Refresh the MetroCluster configuration:

    1. Enter advanced privilege mode:

      set -privilege advanced

    2. Refresh the MetroCluster configuration on one of the new nodes:

      metrocluster configure

      The following example shows the MetroCluster configuration refreshed on both DR groups:

      cluster_A::*> metrocluster configure -refresh true
      
      [Job 726] Job succeeded: Configure is successful.
    3. Return to admin privilege mode:

      set -privilege admin

  3. Verify that the nodes are added to their DR group.

    cluster_A::*> metrocluster node show
    
    DR                               Configuration  DR
    Group Cluster Node               State          Mirroring Mode
    ----- ------- ------------------ -------------- --------- --------------------
    1     cluster_A
                  node_A_1-old        configured     enabled   normal
                  node_A_2-old        configured     enabled   normal
          cluster_B
                  node_B_1-old        configured     enabled   normal
                  node_B_2-old        configured     enabled   normal
    2     cluster_A
                  node_A_3-new        configured     enabled   normal
                  node_A_4-new        configured     enabled   normal
          cluster_B
                  node_B_3-new        configured     enabled   normal
                  node_B_4-new        configured     enabled   normal
    8 entries were displayed.
    
    cluster_A::*>
  4. Move the MDV_CRS volumes from the old nodes to the new nodes in advanced privilege.

    1. Display the volumes to identify the MDV volumes:

      Note If you have a single mirrored data aggregate per site then move both the MDV volumes to this single aggregate. If you have two or more mirrored data aggregates, then move each MDV volume to a different aggregate.

      The following example shows the MDV volumes in the volume show output:

      cluster_A::> volume show
      Vserver   Volume       Aggregate    State      Type       Size  Available Used%
      --------- ------------ ------------ ---------- ---- ---------- ---------- -----
      ...
      
      cluster_A   MDV_CRS_2c78e009ff5611e9b0f300a0985ef8c4_A
                             aggr_b1      -          RW            -          -     -
      cluster_A   MDV_CRS_2c78e009ff5611e9b0f300a0985ef8c4_B
                             aggr_b2      -          RW            -          -     -
      cluster_A   MDV_CRS_d6b0b313ff5611e9837100a098544e51_A
                             aggr_a1      online     RW         10GB     9.50GB    0%
      cluster_A   MDV_CRS_d6b0b313ff5611e9837100a098544e51_B
                             aggr_a2      online     RW         10GB     9.50GB    0%
      ...
      11 entries were displayed.mple
    2. Set the advanced privilege level:

      set -privilege advanced

    3. Move the MDV volumes, one at a time:

      volume move start -volume mdv-volume -destination-aggregate aggr-on-new-node -vserver vserver-name

      The following example shows the command and output for moving "MDV_CRS_d6b0b313ff5611e9837100a098544e51_A" to aggregate "data_a3" on "node_A_3".

      cluster_A::> vol move start -volume MDV_CRS_d6b0b313ff5611e9837100a098544e51_A -destination-aggregate data_a3 -vserver cluster_A
      
      Warning: You are about to modify the system volume
               "MDV_CRS_d6b0b313ff5611e9837100a098544e51_A". This might cause severe
               performance or stability problems. Do not proceed unless directed to
               do so by support. Do you want to proceed? {y|n}: y
      [Job 494] Job is queued: Move "MDV_CRS_d6b0b313ff5611e9837100a098544e51_A" in Vserver "cluster_A" to aggregate "data_a3". Use the "volume move show -vserver cluster_A -volume MDV_CRS_d6b0b313ff5611e9837100a098544e51_A" command to view the status of this operation.
    4. Use the volume show command to check that the MDV volume has been successfully moved:

      volume show mdv-name

      The following output shows that the MDV volume has been successfully moved.

      cluster_A::> vol show MDV_CRS_d6b0b313ff5611e9837100a098544e51_B
      Vserver     Volume       Aggregate    State      Type       Size  Available Used%
      ---------   ------------ ------------ ---------- ---- ---------- ---------- -----
      cluster_A   MDV_CRS_d6b0b313ff5611e9837100a098544e51_B
                             aggr_a2      online     RW         10GB     9.50GB    0%
    5. Return to admin mode:

      set -privilege admin

  5. Move epsilon from an old node to a new node:

    1. Identify which node currently has epsilon:

      cluster show -fields epsilon

      cluster_B::> cluster show -fields epsilon
      node             epsilon
      ---------------- -------
      node_A_1-old      true
      node_A_2-old      false
      node_A_3-new      false
      node_A_4-new      false
      4 entries were displayed.
    2. Set epsilon to false on the old node (node_A_1-old):

      cluster modify -node old-node -epsilon false*

    3. Set epsilon to true on the new node (node_A_3-new):

      cluster modify -node new-node -epsilon true

    4. Verify that epsilon has moved to the correct node:

      cluster show -fields epsilon

      cluster_A::> cluster show -fields epsilon
      node             epsilon
      ---------------- -------
      node_A_1-old      false
      node_A_2-old      false
      node_A_3-new      true
      node_A_4-new      false
      4 entries were displayed.