How to Backup and Restore VMware ESXI Host Configuration

Having healthy ESXi hosts is a key to success when running virtual machines. That’s why it is better to back up ESXi configuration. Thus, if something goes wrong with an ESXi host, its configuration can be restored in a few minutes without spending a lot of time to configure an ESXi server from scratch.

The backup procedure is:
1. Connect to ESXi host via SSH.
2. Run the command below:
vim-cmd hostsvc/firmware/sync_config
This command is to make sure that all the changes of configuration would be saved to the target file.
3. Run the command below:
vim-cmd hostsvc/firmware/backup_config
This command is to generate the link to download the file containing the host configuration. It is like http://*/downloads/123456/configBundle-xx.xx.xx.xx.tgz.
You need to be aware that the “*” is the IP or FQDN of the host so you should manually replace it.
4. Open a web browser and copy and paste the link into it. Type Enter.
The backup file would be downloaded then. It could be found in the folder Download whose name contains “configBundle” and host FQDN. That’s the way to export ESXi configuration.

To decrypt encrypted state.tgz , run the command:
crypto-util envelope extract –aad ESXConfiguration local.tgz.ve local.tgz

The restore procedure is:
1. Rename the backup file into “configBundle.tgz”.
2. Run the command below:
vim-cmd hostsvc/maintenance_mode_enter
This command is to put the ESXi host into maintenance mode
3. Copy the backup file to ESXi host
4. Run the command below:
vim-cmd hostsvc/firmware/restore_config /backup_location/configBundle.tgz
You should replace “/backup_location” with the actual directory.

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