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How to configure RPN SAN on Proxmox

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How to mount an RPN SAN volume on Proxmox

Published on 10 November 2021
Requirements:

Configuration of Proxmox to use the RPN

  1. Log in to your server as root using SSH:

    ssh root@sd-XXX.dedibox.fr
  2. Edit the /etc/network/interfaces file, and replace the lines mentioning eth1 by these ones:

    auto eth1
    iface eth1 inet dhcp
    Tip:

    The interface may be named differently depending on your configuration. You can identify the RPN interface by running ifconfig which allows you to check the MAC address of the interface which is available in your Dedibox console.

  3. Reboot your Proxmox server to complete the RPN configuration.

Open-iSCSI installation and configuration

Proxmox requires the Open-iSCSI software to support mounting of iSCSI volumes. It may not be installed by default in your system.

  1. Log in to your server as root using SSH.

    ssh root@sd-XXX.dedibox.fr
  2. Install open-iscsi using the APT package manager.

    apt install open-iscsi
  3. Open the file /etc/iscsi/iscsid.conf in a text editor, for example nano.

    vi /etc/iscsi/iscsid.conf
    • Adjust the following configuration directives:
    node.conn[0].timeo.noop_out_interval = 0
    node.conn[0].timeo.noop_out_timeout = 0
    node.session.timeo.replacement_timeout = 86400

    The purpose of this change is to prevent your file system from becoming read-only if the link is interrupted for more than two minutes (by default) between your server and the storage server, which can happen during maintenance periods.

    • Configure the setting for automatic reconnection of targets:
    node.startup = automatic
    • Change the following settings to take advantage of the data integrity check, if available:
    node.conn[0].iscsi.HeaderDigest = CRC32C,None
    node.conn[0].iscsi.DataDigest = CRC32C,None
    • Then save your configuration and quit the text editor.
  4. Reboot your server.

    reboot 

Discover and connect to targets in Proxmox

  1. In the Server View, click Datacenter, then Storage.
  2. Click Add and then iSCSI Target. Fill in the form:
    • ID: any identifier used to name this RPN SAN volume
    • Portal: the server on which your space is available (ex: san-1.rpn.online.net)
    • Target: click on the small arrow, and the list of available targets will be displayed (if it is not the case, no need to go further, there is a problem)
    • Nodes: the nodes that can access this target
    • Enable: check the box
    • Use LUNs directly: do not check if you want to create a LVM Group above (recommended, see next step). Check if you want to use the LUN directly
    • Shared: Leave the default option
    • Add the LVM Group (Optional) This step only applies if you want to create a LVM Group to store VM images.
  3. Click Add and then LVM or LVM-Thin. Fill in the form:
    • ID: any identifier to name this LVM Group
    • Base Storage: click on the small arrow, and select the previously mounted storage space
    • Base Volume: click on the small arrow, and select the line that appears
    • Volume Group an identifier of your choice to name the volume group in the system
    • Nodes the nodes that will be able to access this space
    • Enable check the box

Your RPN SAN is available for use.

See Also