Discover and Log in to iSCSI Target

Question

I have an iSCSI target and a SAN IP address. How do I make the iSCSI target visible on compute resources and backup servers?

Environment

All OnApp versions

Answer

To make the iSCSI target visible on compute resources and backup servers:

1. Discover the iSCSI target to see the new LUN and connect to it. This will assume that there is no authentication for the iSCSI connection. If needed, add the necessary details in /etc/iscsi/iscsid.conf before proceeding. For example, you have a target iqn.blah.blah.blah on a server using 10.0.0.25:
   

   iscsiadm -m discovery -t st -p 10.0.0.25 

   CODE

   
   

2. To ensure a proper connection, do the following to log in if you see the target listed:
   

   iscsiadm -m node -l -T iqn.blah.blah.blah

   CODE

3. To determine success and which block device appears on the compute resource/backup server, run the following:
   

   tail -n50 /var/log/messages

   CODE

4. To make it permanent, run the following:
   

   iscsiadm -m node -T iqn.blah.blah.blah -p 10.0.0.25  -o update -n node.startup -v automatic

   CODE

   
   

Repeat the steps for any other compute resources/backup servers where LUN needs to be available, and then follow the standard instructions for adding a new datastore to OnApp. To install an LVM datastore, go to https://docs.onapp.com/ig/latest/install-data-stores#id-.InstallDataStoresv6.5-lvm.