@apahim we are actually trying to traverse the other way, starting with a single path device and working out the virtual mpath dm device details. We could actually use a glob to do this instead of `multipath -l /dev/path` :
~~~ # ll /sys/devices/virtual/block/*/slaves/sdk lrwxrwxrwx. 1 root root 0 Jun 3 03:56 /sys/devices/virtual/block/dm-2/slaves/sdk -> ../../../../pci0000:00/0000:00:07.0/0000:1a:00.0/host0/rport-0:0-8/target0:0:3/0:0:3:3/block/sdk ~~~ IMHO moving to this method is out of scope for this bug but I will try to write up a spec detailing how we could use this method in os-brick. ** No longer affects: cinder ** Description changed: multipath device action incorrectly being parsed as the device name. The first word on the first line of `multipath -l $path` is currently being used as the name of a given multipath device. https://github.com/openstack/nova/blob/master/nova/storage/linuxscsi.py#L118 + https://github.com/openstack/os-brick/blob/master/os_brick/initiator/linuxscsi.py#L145 This however can be an `action:` string when the device is being created, reloaded, resized etc. [1][2][3] [1] https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/DM_Multipath/MPIO_output.html [2] http://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=libmultipath/print.c;h=5d63ed34d2a8816a5e287bdeb1bd90cdb026bb9e;hb=HEAD#l929 [3] http://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=libmultipath/configure.h;h=c014b5533226d9a56571f87b9123de91c5ff1d2f;hb=HEAD -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1466444 Title: multipath device action incorrectly being parsed as the device name Status in OpenStack Compute (Nova): In Progress Status in Volume discovery and local storage management lib: New Bug description: multipath device action incorrectly being parsed as the device name. The first word on the first line of `multipath -l $path` is currently being used as the name of a given multipath device. https://github.com/openstack/nova/blob/master/nova/storage/linuxscsi.py#L118 https://github.com/openstack/os-brick/blob/master/os_brick/initiator/linuxscsi.py#L145 This however can be an `action:` string when the device is being created, reloaded, resized etc. [1][2][3] [1] https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/DM_Multipath/MPIO_output.html [2] http://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=libmultipath/print.c;h=5d63ed34d2a8816a5e287bdeb1bd90cdb026bb9e;hb=HEAD#l929 [3] http://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=libmultipath/configure.h;h=c014b5533226d9a56571f87b9123de91c5ff1d2f;hb=HEAD To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1466444/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
