On 4/5/10 11:15 AM, "Andrey Borzenkov" <arvidjaar@xxxxxxx> wrote:
> On Monday 05 of April 2010 22:00:49 Mike Ely wrote:
>> (resending because our clunky old MTA doesn¹t know how to handle
>> greylisting)
>>
>> I'm wondering how to get open-iscsi and udev folks to work together
>> on a good solution for getting ISCSI volumes to map consistently to
>> a /dev/ entry. What would be a good starting point for getting the
>> discussion going? Currently the only solutions I can find are some
>> scripting tricks, but it¹d be nice to see something a bit more
>> integrated. Not all use cases support filesystem labels.
>>
>
> udev already includes path_id that generates persistent name for iSCSI
> device. Could you be more specific what exactly it misses?
I'm not sure how to get path_id to work then. Here's an example of it not
working through several remounts on RHEL 5 - look at the number of
partitions in each volume to see how it's randomly remapping:
(root@OEL64R5U2)(~)# iscsiadm -m node -T
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme
--login
Logging in to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]
Login to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]: successful
(root@OEL64R5U2)(~)# cat /proc/partitions
major minor #blocks name
202 0 20971520 xvda
202 1 104391 xvda1
202 2 1574370 xvda2
202 3 12996585 xvda3
202 4 1 xvda4
202 5 4192933 xvda5
202 6 2096451 xvda6
8 0 104862720 sda
8 1 56196 sda1
8 2 104800027 sda2
8 16 1059840 sdb
(root@OEL64R5U2)(~)# service iscsi restart
Logging out of session [sid: 4, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]
Logging out of session [sid: 5, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]
Logout of [sid: 4, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]: successful
Logout of [sid: 5, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]: successful
Stopping iSCSI daemon:
iscsid dead but pid file exists [ OK ]
Turning off network shutdown. Starting iSCSI daemon: [ OK ]
[ OK ]
Setting up iSCSI targets: Logging in to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]
Logging in to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]
Login to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]: successful
Login to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]: successful
[ OK ]
(root@OEL64R5U2)(~)# cat /proc/partitions
major minor #blocks name
202 0 20971520 xvda
202 1 104391 xvda1
202 2 1574370 xvda2
202 3 12996585 xvda3
202 4 1 xvda4
202 5 4192933 xvda5
202 6 2096451 xvda6
8 16 104862720 sdb
8 17 56196 sdb1
8 18 104800027 sdb2
8 0 1059840 sda
(root@OEL64R5U2)(~)# service iscsi restart
Logging out of session [sid: 1, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]
Logging out of session [sid: 2, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]
Logout of [sid: 1, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]: successful
Logout of [sid: 2, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]: successful
Stopping iSCSI daemon:
iscsid dead but pid file exists [ OK ]
Turning off network shutdown. Starting iSCSI daemon: [ OK ]
[ OK ]
Setting up iSCSI targets: Logging in to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]
Logging in to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]
Login to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]: successful
Login to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]: successful
[ OK ]
(root@OEL64R5U2)(~)# cat /proc/partitions
major minor #blocks name
202 0 20971520 xvda
202 1 104391 xvda1
202 2 1574370 xvda2
202 3 12996585 xvda3
202 4 1 xvda4
202 5 4192933 xvda5
202 6 2096451 xvda6
8 0 104862720 sda
8 1 56196 sda1
8 2 104800027 sda2
8 16 1059840 sdb
(root@OEL64R5U2)(~)# service iscsi restart
Logging out of session [sid: 1, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]
Logging out of session [sid: 2, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]
Logout of [sid: 1, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]: successful
Logout of [sid: 2, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]: successful
Stopping iSCSI daemon:
iscsid dead but pid file exists [ OK ]
Turning off network shutdown. Starting iSCSI daemon: [ OK ]
[ OK ]
Setting up iSCSI targets: Logging in to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-79b89fb03-9ce0003e5bb4bb65-proddb1-db1,
portal: 10.1.xx.xx,3260]
Logging in to [iface: default, target:
iqn.2001-05.com.equallogic:0-8a0906-4f489fb03-3c60003e5c34bb68-deleteme,
portal: 10.1.xx.xx,3260]
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