Before upgrading to VMware Cloud Director 10.4.1, verify that the embedded PostgreSQL database has the required available disk space.

If you are upgrading the VMware Cloud Director appliance to version 10.4.1, the embedded PostgreSQL database upgrades from version 10 to version 14. This process involves cloning the existing database contents to a new local instance, which results in a temporary increase in disk utilization. Because of this, verify that before starting the upgrade, you have sufficient free space on the database disk.

Attention:

Because the cloning process only includes the database contents and not the database logs nor the write-ahead logs that are used for replication, verify that the database logs are backed up in compliance with your organization's log retention policies.

Procedure

  1. To check the available disk space, run the following command and make a note of the result. 
    df -B G /var/vmware/vpostgres/
  2. Run the commands to check the size of the /pg_wal and /log directories under your vpostgres data directory. 
    du -B G --summarize /var/vmware/vpostgres/current/pgdata/pg_wal/
    du -B G --summarize /var/vmware/vpostgres/current/pgdata/log/
  3. Substract the size of the log directories from the total used disk space.

Results

If the total available space in the system is more than the result of the substraction, you can proceed with the upgrade.

Example: Check the available disk space on the database disk

Run the command to check the available disk space.

  1. Run the command to check the available disk space.
    df -B G /var/vmware/vpostgres/
    The command returns the following information. 
    Filesystem                Size  Used Avail Use% Mounted on
/dev/mapper/database_vg-vpostgres   84G   30G   54G  36% /var/vmware/vpostgres
  2. Run the commands to check the size of the /pg_wal and /log directories under your vpostgres data directory.
    du -B G --summarize /var/vmware/vpostgres/current/pgdata/pg_wal/
    du -B G --summarize /var/vmware/vpostgres/current/pgdata/log/
    The commands return the following information. 
    12G	/var/vmware/vpostgres/current/pgdata/pg_wal/
    1G	/var/vmware/vpostgres/current/pgdata/log/
  3. Substract the size of the log directories from the total used disk space: 30-12-1=17.

    This result means that the database needs at least 17GB of available disk space for the upgrade. The total available space in this system is 54GB, so it is safe to proceed with the upgrade.

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