centos7 iscsi is adding ipv6 nodes on ipv4 only system about open-iscsi

[devZer0]

yes, instead of removing the ipv6 entries in the filesystem, changing

/var/lib/iscsi/nodes/iqn.2000-01.com.synology:DiskStation4.Target-1.3ea3d7a31e/fe80::211:32ff:fe0c:d12,3260,1/default )

entry

node.startup = automatic

into

node.startup = manual

also fixes the problem for me.

[gonzoleeman]

My first response is that the target is the problem. The protocol sets forth the sequence: We ask the target portal to send a list of targets, with their IQNs. There is no protocol for telling a target portal you just want a subset of it's LUNs. But that's just my first response ...

[cleech]

Lee's right that there's no way to request a subset of portals during sendtargets discovery, so the options are to either remove the IPv6 portals from the target if IPv6 is not allowed in your network or do some sort of post filtering on the initiator. Deleting the records is fine, as would be disabling automatic startup for them by switching them to manual.

The man page states that the -A/--portal_type option is specific to flashnode new commands, but something like that for selecting records for update or delete could be nice. We don't have that now.

Improved handling of connection errors and timeouts would be nice as well, but I've heard opinions go both ways (don't ever give up completely vs. time out faster) depending on use case.

You should be able to adjust the default initial_login_retry_max and login_timeout settings in /etc/iscsi/iscsid.conf down to give up on the IPv6 portals much faster.