I've seen a lot of information about how IQN's should be formatted, but there's not a lot of information on how to build them. I'm kind of a newb when it comes to iSCSI, and i have it working, but I'm wondering if i should just be making this stuff up, or if there's good reason to follow some sort of standard.
As an example, this is how (wikipedia http://en.wikipedia.org/wiki/ISCSI#Addressing) says you should format IQNs.
Naming String defined by Type Date Auth "example.com" naming authority +--++-----+ +---------+ +-----------------------------+ | || | | | | | iqn.1992-01.com.example:storage:diskarrays-sn-a8675309 iqn.1992-01.com.example iqn.1992-01.com.example:storage.tape1.sys1.xyz iqn.1992-01.com.example:storage.disk2.sys1.xyz
My question is particularly, Why the date? Can it be anything, Does it mean anything? Are there any enforcements here? Will i ever run into a point where putting the 'wrong' date in will bite me?
Is the domain example reversed(like dns is) for a reason? If i have a domain name like starkindustries.pri would my iqn look like:
Does this depend on DNS? (experience tells me it isn't, but it could be failing in sublte ways) And if it is dependent on DNS, do i use a host name, or just my domain name? i.e. Jarvis.starkindustries.pri or just starkindustries.pri ?
Also If i use an IP address(which some suggest if you're not using DNS which is more confusing because it works without DNS) do you reverse it like you do dns? i.e. 10.1.2.0
Also, do you use a host address (of the iSCSI target?) or a network address.
Is there any enforcement of the 'string defined by "example.com" naming authority' i.e. is there a reason i can't use blahblahblah vs something useful? I realize a useful name is more descriptive, but are there any technical reasons for this? I also take a huge leap of faith that I'm the 'naming authority'.
I guess more than anything, I'm making up a bunch of stuff for these IQNs, and they appear to be working. I just want to know at least where to find some best practices when it comes to the actual generation of the iqns. I'm just considering that someday I'm going to not be the only one in charge of storage, so i need to pass down some standards, or i'm either going to make a mess, or have someone else make a mess when a new block of IQNs are needed.