# isoLayer (Synthetic)

## Prerequisites

You need a NFS server with storage with XFS filesystem to properly configure isoLayer Backup Destination in Storware Backup & Recovery.

## Preparation

1. On NFS server we need to create NFS share, for example:

   ```
   mkdir /NFS
   ```
2. Edit file `/etc/exports` to add access to this share:

   ```
   /NFS SBR_NODE_IP(rw,sync,no_all_squash,no_root_squash)
   ```

   Where SBR\_NODE\_IP is IP of Storware Backup & Recovery Node, which will have access to this share
3. Generate new SSH keys, without any password:

   ```
   ssh-keygen 
   Generating public/private rsa key pair.
   Enter file in which to save the key (/root/.ssh/id_rsa): 
   Enter passphrase (empty for no passphrase): 
   Enter same passphrase again: 
   Your identification has been saved in /root/.ssh/id_rsa.
   Your public key has been saved in /root/.ssh/id_rsa.pub.
   The key fingerprint is:
   SHA256:H2NJwORiG3oJDm78sKEx4EuOzIm13vUsJ6NfMOPVgt0 root@vpro43-vmware
   The key's randomart image is:
   +---[RSA 3072]----+
   |       oo        |
   |       ...       |
   |. . . + . .      |
   |oo o + B + .     |
   |ooB o O S E      |
   |B*o* o = + o     |
   |+*o . o . .      |
   | . . .++.        |
   |  . oo.=o        |
   +----[SHA256]-----+
   ```
4. Add new public key to `/root/.ssh/authorized_keys` file

   ```
   cat /root/.ssh/id_rsa.pub > /root/.ssh/authotized_keys
   ```
5. Copy generated private key (id\_rsa) to Storware Backup & Recovery Node host

   ```
   scp /root/.ssh/id_rsa root@SBR_NODE_IP:/opt/vprotect/.ssh/
   ```
6. SSH to Storware Backup & Recovery Node and change owner of this file:

   ```
   chown vprotect:vprotect /opt/vprotect/.ssh/id_rsa
   ```
7. Connect from Storware Backup & Recovery Node to NFSs:

   ```
   ssh -i /opt/vprotect/.ssh/id_rsa root@NFSs
   ```

   accept new fingerprint and exit from remote session
8. Copy last line from `/root/.ssh/known_hosts` file into `/opt/vprotect/.ssh/known_hosts` file
9. Configure isoLayer connection. Edit `/opt/vprotect/scripts/isoLayer/config` file:

   ```
   vi /opt/vprotect/scripts/isoLayer/config)
   NFS_HOST=NFS4.2_HOST_IP
   SSH_USER=root
   SSH_KEY=~/.ssh/id_rsa
   NFS_HOST_PATTERN=NODE_IP
   NFS_ROOT=PATH_FOR_MOUNT_POINTS
   NFS_OPTS=rw,sync,insecure,no_root_squash,no_subtree_check
   ```

   where:

   `NFS_HOST` - IP address of NFS server

   `NFS_HOST_PATTERN` - IP address (CIDR) of NFS server, for example: 10.10.0.0/24

   `NFS_ROOT` - NFS server share path, where we want to store our backups, for example /NFS/backup

## Creating isoLayer backup destination

1. Login into Storware Backup & Recovery UI.
2. From menu on the left, select **Backup Destinations** -> **File System**.
3. On the right, click **Create Backup Destination** button and choose **isoLayer (Synthetic)**.
4. In new window:

   * type name for the backup destination
   * select Node Configurations
   * provide backup destination path – this is place, where from Storware Backup & Recovery Node perspective, isoLayer will be temporary mount share from NFS server
   * Check if pre and post scripts are active, and correct paths are provided like in example:

   ![](https://content.gitbook.com/content/pLZqcHnyZSrAssyuc8UU/blobs/MlQoRgCP5sMdOoSEGgcu/deployment_backup-destination_filesystem_isolayer.png)

   * Click **Save** button
5. Now you can use this isoLayer connection to store your backup.