Re: [Xen-devel] block-iscsi with Xen 4.5 / 4.6

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Apr 15, 2016 at 05:48:24PM +1000, Steven Haigh wrote:
> On 2016-04-15 17:46, Roger Pau Monné wrote:
> > On Fri, Apr 15, 2016 at 05:28:12PM +1000, Steven Haigh wrote:
> > > On 2016-04-15 17:23, Roger Pau Monné wrote:
> > > > On Fri, Apr 15, 2016 at 04:59:11PM +1000, Steven Haigh wrote:
> > > > > Hi all,
> > > > >
> > > > > I'm wading through the somewhat confusing world of documentation
> > > > > regarding
> > > > > storing DomU disk images on an iSCSI target.
> > > > >
> > > > > I'm getting an error when using pygrub of:
> > > > > OSError: [Errno 2] No such file or directory: 
> > > > > 'iqn=iqn.1986-03.com.sun:02:ff2d12c0-b709-4ec0-999d-976506c666f5,portal=192.168.133.250'
> > > >
> > > > Hello,
> > > >
> > > > It should work. Can you please paste your guest configuration file and
> > > > the
> > > > output of the create command with "-vvv"?
> > > 
> > > DomU config file:
> > > bootloader      = "pygrub"
> > > name            = "test1.vm"
> > > memory          = 2048
> > > vcpus           = 2
> > > cpus            = "1-7"
> > > vif             = ['bridge=br-151, vifname=vm.test1']
> > > disk            = 
> > > ['script=block-iscsi,vdev=xvda,target=iqn=iqn.1986-03.com.sun:02:ff2d12c0-b709-4ec0-999d-976506c666f5,portal=192.168.133.250']
> > > boot            = "c"
> > > 
> > > # xl create /etc/xen/test1.vm -d -c
> > 
> > Please post the output of xl -vvv create /etc/xen/test1.vm.
> 
> Whoops - apologies:
> 
> # xl -vvv create /etc/xen/test1.vm
> Parsing config from /etc/xen/test1.vm
> libxl: debug: libxl_create.c:1507:do_domain_create: ao 0x20b7260: create:
> how=(nil) callback=(nil) poller=0x20b6b30
> libxl: debug: libxl_device.c:269:libxl__device_disk_set_backend: Disk
> vdev=xvda spec.backend=unknown
> libxl: debug: libxl_device.c:207:disk_try_backend: Disk vdev=xvda, uses
> script=... assuming phy backend
> libxl: debug: libxl_device.c:298:libxl__device_disk_set_backend: Disk
> vdev=xvda, using backend phy
> libxl: debug: libxl_create.c:907:initiate_domain_create: running bootloader
> libxl: debug: libxl_device.c:269:libxl__device_disk_set_backend: Disk
> vdev=(null) spec.backend=phy
> libxl: debug: libxl_device.c:207:disk_try_backend: Disk vdev=(null), uses
> script=... assuming phy backend
> libxl: debug: libxl.c:3064:libxl__device_disk_local_initiate_attach: locally
> attaching PHY disk 
> iqn=iqn.1986-03.com.sun:02:ff2d12c0-b709-4ec0-999d-976506c666f5,portal=192.168.133.250

Now I remember, this was fixed not long ago, you will need to apply 
b1882a424ae098d722b19086b16e64b9aeccc7ca to your source tree/package in 
order to get pygrub working with hotplug scripts [0].

I guess you are using Xen 4.5, because this commit is already present in Xen 
4.6, and it should fix your issue.

Roger.

[0] 
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=b1882a424ae098d722b19086b16e64b9aeccc7ca

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