Ubuntu iSCSI connect to multiple targets on boot
Using iSCSI grub parameters can login to one iSCSI target at booting time, but for more than one targets, auto iSCSI session login might not be possible, at least I haven't found a way to do that.
In order to login to other multiple targets, modification need to be done in iSCSI discovered configuration
Login on boot
After discover the iSCSI targets, the targets will be in
/etc/iscsi/nodes folder. Then found the correct target which in the format as below.
Modify the above file and change following two parameters
node.startup = automatic
node.conn.startup = onboot