[pve-devel] LXC volumes on ZFS over iSCSI

[Michael Rasmussen]

On Mon, 10 Oct 2016 22:30:04 +0200 (CEST)
Alexandre DERUMIER <aderumier at odiso.com> wrote:

> 
> I'm afraid of behaviour if a node is not joinable to do the delete or rescan.
> Seem to be difficult to manage with big cluster.
> I'm curious to see result of:
> 
It seems to work :-)

1) After login to target:
Oct 11 22:56:41 pve-dev kernel: [70633.376458] scsi host6: iSCSI Initiator over TCP/IP
Oct 11 22:56:42 pve-dev kernel: [70633.885229] scsi 6:0:0:0: Direct-Access     SUN      COMSTAR          1.0  PQ: 0 ANSI: 5
Oct 11 22:56:42 pve-dev kernel: [70633.887715] sd 6:0:0:0: Attached scsi generic sg2 type 0
Oct 11 22:56:42 pve-dev kernel: [70633.889615] sd 6:0:0:0: [sdb] 4194304 512-byte logical blocks: (2.15 GB/2.00 GiB)
Oct 11 22:56:42 pve-dev kernel: [70633.891141] sd 6:0:0:0: [sdb] Write Protect is off
Oct 11 22:56:42 pve-dev kernel: [70633.891655] sd 6:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Oct 11 22:56:42 pve-dev kernel: [70633.902977] sd 6:0:0:0: [sdb] Attached SCSI disk
fdisk -l
Disk /dev/sdb: 2 GiB, 2147483648 bytes, 4194304 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

2) On target remove view
3) Rescan target:
Oct 11 22:59:06 pve-dev kernel: [70778.489172] sdb: detected capacity change from 2147483648 to 0
fdisk -l
No disk /dev/sdb
lsscsi 
[1:0:0:0]    cd/dvd  QEMU     QEMU DVD-ROM     2.5+  /dev/sr0 
[2:0:0:0]    disk    SUN      COMSTAR          1.0   /dev/sda 
[6:0:0:0]    disk    SUN      COMSTAR          1.0   /dev/sdb 
echo 1 > /sys/bus/scsi/devices/target6\:0\:0/6\:0\:0\:0/delete
lsscsi 
[1:0:0:0]    cd/dvd  QEMU     QEMU DVD-ROM     2.5+  /dev/sr0 
[2:0:0:0]    disk    SUN      COMSTAR          1.0   /dev/sda 
4) On target add view again
5) Rescan target:
Oct 11 23:11:11 pve-dev kernel: [71503.637169] scsi 6:0:0:0: Direct-Access     SUN      COMSTAR          1.0  PQ: 0 ANSI: 5
Oct 11 23:11:11 pve-dev kernel: [71503.638560] sd 6:0:0:0: Attached scsi generic sg2 type 0
Oct 11 23:11:11 pve-dev kernel: [71503.641348] sd 6:0:0:0: [sdb] 4194304 512-byte logical blocks: (2.15 GB/2.00 GiB)
Oct 11 23:11:11 pve-dev kernel: [71503.645011] sd 6:0:0:0: [sdb] Write Protect is off
Oct 11 23:11:11 pve-dev kernel: [71503.645520] sd 6:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
Oct 11 23:11:11 pve-dev kernel: [71503.655686] sd 6:0:0:0: [sdb] Attached SCSI disk
lsscsi 
[1:0:0:0]    cd/dvd  QEMU     QEMU DVD-ROM     2.5+  /dev/sr0 
[2:0:0:0]    disk    SUN      COMSTAR          1.0   /dev/sda 
[6:0:0:0]    disk    SUN      COMSTAR          1.0   /dev/sdb 


-- 
Hilsen/Regards
Michael Rasmussen

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