Los clústeres del entorno de NSX-v se muestran en la página Migrar hosts. Los clústeres se organizan en grupos de migración, cada uno de los cuales contiene un clúster de hosts de vSphere. Existen varios ajustes que controlan cómo se realiza la migración del host.

  • Click Settings to change the global settings: Pause Between Groups and Migration Order Across Groups.
  • Select a single host group (cluster) and use the arrows to move it up or down in the migration sequence.
  • Select one or more host groups (clusters) and click Actions to change these host groups settings: Migration Order Within Groups, Migration State, and Migration Mode.

Pause Between Groups

Pause Between Groups is a global setting that applies to all host groups. If pausing is enabled, the migration coordinator migrates one host group, and then waits for input. You must click Continue to continue to the next host group.

By default, Pause Between Groups is disabled. If you want to verify the status of the applications running on each cluster before proceeding to the next one, enable Pause Between Groups.

Serial or Parallel Migration Order

You can define whether migration happens in a serial or parallel order. There are two ordering settings:
  • Migration Order Across Groups is a global setting that applies to all host groups.

    • Serial: One host group (cluster) at a time is migrated.
    • Parallel: Up to five host groups at a time are migrated. After those five host groups are migrated, the next batch of up to five host groups are migrated.
      Importante:

      If you are migrating from NSX-v 6.4.4, 6.4.5, or 6.4.6, and your environment uses vSphere Distributed Switch 7.0, do not select parallel migration order across groups.

      If you are migrating from NSX-v 6.4.8 or later, and your environment uses vSphere Distributed Switch 7.0, parallel migration order across groups is supported.

  • Migration Order Within Groups is a host group (cluster) specific setting, so can be configured separately on each host group.

    • Serial: One host within the host group (cluster) at a time is migrated.
    • Parallel: Up to five hosts within the host group are migrated at a time. After those hosts are migrated, the next batch of up to five hosts are migrated.
      Importante: Do not select parallel migration order within groups for a cluster if you plan to use Maintenance migration mode for that cluster.

By default, both settings are set to Serial. Together, the settings determine how many hosts are migrated at a time.

Tabla 1. Effects of Migration Settings on Number of Hosts Attempting Migration Simultaneously
Migration Order Across Groups (Clusters) Migration Order Within Groups (Clusters) Maximum Number of Hosts Attempting Migration Simultaneously
Serial Serial 1

One host from one host group

Serial Parallel 5

Five hosts from one host group

Parallel Serial 5

One host from five host groups

Parallel Parallel 25

Five hosts from five host groups

Importante:

If there is a failure to migrate a host, the migration process will pause after all in-progress host migrations have finished. If Parallel is selected for both migration across groups and migration within groups, there might be a long outage for the failed host before you can retry migration.

Sequence of Migration Groups

You can select a host group (cluster) and use the arrows to move it up or down in the list of groups.

Si falla la migración de un host, puede mover su grupo de hosts a la parte inferior de la lista de grupos. La migración de otros grupos de hosts podrá continuar mientras resuelve el problema de ese host.

Migration State

Host groups (clusters) can have one of two migration states:

  • Enabled

    Hosts groups with a migration state of Enabled are migrated to NSX-T when you click Start on the Migrate Hosts page.

  • Disabled

    You can temporarily exclude host groups from migration by setting the migration state for the groups to Disabled. Hosts in disabled groups are not migrated to NSX-T when you click Start on the Migrate Hosts page. However, you must enable and migrate all Disabled host groups before you can click Finish. Finish all host migration tasks and click Finish within the same maintenance window.

In the Resolve Configuration step, the migration coordinator identifies the hosts that are ineligible for migration. In the Migrate Hosts step, these hosts are assigned the migration state of Do not migrate. For example, hosts that do not have NSX-v installed have the Do not migrate status.

Migration Mode

Migration Mode is a host group (cluster) specific setting, and can be configured separately on each host group. In the Migrate Hosts step, you select whether to use In-Place or Maintenance mode.

There are two types of Maintenance migration modes:
  • Automated
  • Manual
In the Resolve Configuration step of the migration process, you select which type of Maintenance migration mode to use. You select a Maintenance mode even if you plan to migrate hosts using In-Place mode. When you select Maintenance migration mode in the Migrate Hosts step, the value you specified in the Resolve Configuration step determines whether Automated Maintenance mode or Manual Maintenance mode is used. However, in the Migrate Hosts step, if you select In-Place mode, your selected choice of Maintenance mode in the Resolve Configuration step does not take effect.

El modo de migración Local no se admite si la instalación de NSX-v utiliza vSphere Distributed Switch 7.0.

Si su entorno utiliza un firewall distribuido, seleccione el modo de migración Mantenimiento automatizado. Si selecciona un modo de migración diferente, se aplicarán las siguientes limitaciones a los entornos con firewall distribuido:

  • Si utiliza el modo de migración Mantenimiento manual, todas las máquinas virtuales deberán moverse a hosts de NSX-T que estén conectados a segmentos de NSX-T y que estén encendidos antes de que el último host de NSX-v empiece a migrarse. Cuando migre el último host de NSX-v, no apague las máquinas virtuales en el host. Muévalas a un host de NSX-T mediante vMotion.
  • Si utiliza el modo de migración Mantenimiento manual, las máquinas virtuales tendrán un hueco en la protección del firewall hasta 5 minutos después de que se mueven a un host de NSX-T.
  • Si usa el modo de migración Local y tiene reglas de firewall distribuido que se aplican a una máquina virtual, dichas reglas no se aplicarán al host hasta que se hayan migrado todas sus máquinas virtuales. Hasta que se apliquen las reglas en el host, se aplicará lo siguiente:
    • Si la regla predeterminada de NSX-T es deny, no se podrá acceder a la máquina virtual.
    • Si la regla predeterminada de NSX-T es accept, la máquina virtual no estará protegida por las reglas aplicadas.
El proceso de migración es diferente para cada modo de migración:
  • In-Place migration mode

    NSX-T is installed and NSX components are migrated while VMs are running on the hosts. Hosts are not put in maintenance mode during migration. Virtual machines experience a short network outage and network storage I/O outage during the migration.

  • Automated Maintenance migration mode

    A task of entering maintenance mode is automatically queued. VMs are moved to other hosts using vMotion. Depending on availability and capacity, VMs are migrated to NSX-v or NSX-T hosts. After the host is evacuated, the host enters maintenance mode, NSX-T is installed, and NSX components are migrated. VMs are migrated back to the newly configured NSX-T host. Note that Migration Coordinator will not reconfigure VMs that are powered off. After migration, you need to manually configure these VMs before powering them on.

  • Manual Maintenance migration mode

    A task of entering maintenance mode is automatically queued. To allow the host to enter maintenance mode, do one of the following tasks:
    • Power off all VMs on the hosts.
    • Move the VMs to another host using vMotion or cold migration.

    Once the host is in maintenance mode, NSX-T is installed on the host and NSX components are migrated. Note that the powered-off VMs and their network configurations are not migrated. You will need to manually connect the VMs to their NSX-T segments.