Hi Jeremy,

as a general rule of thumb XenServer errors are pretty accurate – hence 
“HOST_CANNOT_ATTACH_NETWORK, OpaqueRef:65d0c844-bd70-81e9-4518-8809e1dc0ee7, 
OpaqueRef:0093ac3f-9f3a-37e1-9cdb-581398d27ba2” is where you should start. The 
reason you are hitting issues just with your system VMs is they are attached to 
the management interface (which user VMs aren’t).

So a couple of things to check:
1) Check the bonds on all your XS hosts – are they consistent? Do you have the 
same PIFs attached to each bond on each host?
2) Check networks on all your XS hosts – in particular check your “Host 
internal management network” and “cloud_link_local_network” networks (xe 
network-list params=all). Your network UUIDs should match between hosts for the 
same networks. About 250 years ago XenServer sometimes pulled a trick where 
networks appeared with different UUIDs on different hosts.
3) Check if those opaquerefs match up to anything – not sure if they will. 
Vague article on difference between UUIDs and opaquerefs here - 
https://wiki.xenproject.org/wiki/OpaqueRef_and_uuid_relationship_in_xapi 
4) You may also want to check if this is happening on all hosts by disabling 
(not maintence) all but one, check, enable, move on to next, rinse and repeat. 
If you find you have one dodgy host then evacuate it from the pool, ideally 
rebuild it and rejoin it to the pool.
5) Have you tried to force reconnect the hosts? 

These are all shots in the dark, but hopefully you’ll come across something not 
looking right.

Regards,
Dag Sonstebo
Cloud Architect
ShapeBlue

On 15/06/2017, 12:56, "S. Brüseke - proIO GmbH" <s.brues...@proio.com> wrote:

    I once did have some similar problem with my systemvms and my root cause 
was that in the global settings it referred to the wrong systemvm template. I 
am not sure if this helps you, but wanted to tell you.
    
    Mit freundlichen Grüßen / With kind regards,
    
    Swen
    
    -----Ursprüngliche Nachricht-----
    Von: Jeremy Peterson [mailto:jpeter...@acentek.net] 
    Gesendet: Donnerstag, 15. Juni 2017 01:55
    An: users@cloudstack.apache.org
    Betreff: RE: Recreating SystemVM's
    
    Hahaha.  The best response ever. 
    
    I dug through these emails and someone had soft of the same log messages 
cannot attach network and blamed xenserver. Ok I'm cool with that but why oh 
why is it only system vms?
    
    Jeremy
    ________________________________________
    From: Imran Ahmed [im...@eaxiom.net]
    Sent: Wednesday, June 14, 2017 6:22 PM
    To: users@cloudstack.apache.org
    Subject: RE: Recreating SystemVM's
    
    Yes,
    
    -----Original Message-----
    From: Jeremy Peterson [mailto:jpeter...@acentek.net]
    Sent: Wednesday, June 14, 2017 9:59 PM
    To: users@cloudstack.apache.org
    Subject: RE: Recreating SystemVM's
    
    Is there anyone out there reading these messages?
    
    Am I just not seeing responses?
    
    Jeremy
    
    
    -----Original Message-----
    From: Jeremy Peterson [mailto:jpeter...@acentek.net]
    Sent: Wednesday, June 14, 2017 8:12 AM
    To: users@cloudstack.apache.org
    Subject: RE: Recreating SystemVM's
    
    I opened an issue since this is still an issue.  CLOUDSTACK-9960
    
    Jeremy
    
    -----Original Message-----
    From: Jeremy Peterson [mailto:jpeter...@acentek.net]
    Sent: Sunday, June 11, 2017 9:10 AM
    To: users@cloudstack.apache.org
    Subject: Re: Recreating SystemVM's
    
    Any other suggestions?
    
    I am going to be scheduling to run XenServer updates.  But this all points 
back to CANNOT_ATTACH_NETWORk.
    
    I've verified nothing is active on the Public IP space that those two VM's 
were living on.
    
    Jeremy
    ________________________________________
    From: Jeremy Peterson <jpeter...@acentek.net>
    Sent: Friday, June 9, 2017 9:58 AM
    To: users@cloudstack.apache.org
    Subject: RE: Recreating SystemVM's
    
    I see the vm's try to create on a host that I just removed from maintenance 
mode to install updates and here are the logs
    
    I don't see anything that sticks out to me as a failure message.
    
    Jun  9 09:53:54 Xen3 SM: [13068] ['ip', 'route', 'del', '169.254.0.0/16']
    Jun  9 09:53:54 Xen3 SM: [13068]   pread SUCCESS
    Jun  9 09:53:54 Xen3 SM: [13068] ['ifconfig', 'xapi12', '169.254.0.1', 
'netmask', '255.255.0.0']
    Jun  9 09:53:54 Xen3 SM: [13068]   pread SUCCESS
    Jun  9 09:53:54 Xen3 SM: [13068] ['ip', 'route', 'add', '169.254.0.0/16', 
'dev', 'xapi12', 'src', '169.254.0.1']
    Jun  9 09:53:54 Xen3 SM: [13068]   pread SUCCESS
    Jun  9 09:53:54 Xen3 SM: [13071] ['ip', 'route', 'del', '169.254.0.0/16']
    Jun  9 09:53:54 Xen3 SM: [13071]   pread SUCCESS
    Jun  9 09:53:54 Xen3 SM: [13071] ['ifconfig', 'xapi12', '169.254.0.1', 
'netmask', '255.255.0.0']
    Jun  9 09:53:54 Xen3 SM: [13071]   pread SUCCESS
    Jun  9 09:53:54 Xen3 SM: [13071] ['ip', 'route', 'add', '169.254.0.0/16', 
'dev', 'xapi12', 'src', '169.254.0.1']
    Jun  9 09:53:54 Xen3 SM: [13071]   pread SUCCESS
    
    
    Jun  9 09:54:00 Xen3 SM: [13115] on-slave.multi: {'vgName':
    'VG_XenStorage-469b6dcd-8466-3d03-de0e-cc3983e1b6e2', 'lvName1':
    'VHD-633338a7-6c40-4aa6-b88e-c798b6fdc04d', 'action1':
    'deactivateNoRefcount', 'action2': 'cleanupLock', 'uuid2':
    '633338a7-6c40-4aa6-b88e-c798b6fdc04d', 'ns2':
    'lvm-469b6dcd-8466-3d03-de0e-cc3983e1b6e2'}
    Jun  9 09:54:00 Xen3 SM: [13115] LVMCache created for
    VG_XenStorage-469b6dcd-8466-3d03-de0e-cc3983e1b6e2
    Jun  9 09:54:00 Xen3 SM: [13115] on-slave.action 1: deactivateNoRefcount Jun
    9 09:54:00 Xen3 SM: [13115] LVMCache: will initialize now Jun  9 09:54:00
    Xen3 SM: [13115] LVMCache: refreshing Jun  9 09:54:00 Xen3 SM: [13115] 
['/usr/sbin/lvs', '--noheadings', '--units', 'b', '-o', '+lv_tags', 
'/dev/VG_XenStorage-469b6dcd-8466-3d03-de0e-cc3983e1b6e2']
    Jun  9 09:54:00 Xen3 SM: [13115]   pread SUCCESS
    Jun  9 09:54:00 Xen3 SM: [13115] ['/usr/sbin/lvchange', '-an',
    '/dev/VG_XenStorage-469b6dcd-8466-3d03-de0e-cc3983e1b6e2/VHD-633338a7-6c40-4
    aa6-b88e-c798b6fdc04d']
    Jun  9 09:54:00 Xen3 SM: [13115]   pread SUCCESS
    Jun  9 09:54:00 Xen3 SM: [13115] ['/sbin/dmsetup', 'status',
    'VG_XenStorage--469b6dcd--8466--3d03--de0e--cc3983e1b6e2-VHD--633338a7--6c40
    --4aa6--b88e--c798b6fdc04d']
    Jun  9 09:54:00 Xen3 SM: [13115]   pread SUCCESS
    Jun  9 09:54:00 Xen3 SM: [13115] on-slave.action 2: cleanupLock
    
    Jun  9 09:54:16 Xen3 SM: [13230] ['ip', 'route', 'del', '169.254.0.0/16']
    Jun  9 09:54:16 Xen3 SM: [13230]   pread SUCCESS
    Jun  9 09:54:16 Xen3 SM: [13230] ['ifconfig', 'xapi12', '169.254.0.1', 
'netmask', '255.255.0.0']
    Jun  9 09:54:16 Xen3 SM: [13230]   pread SUCCESS
    Jun  9 09:54:16 Xen3 SM: [13230] ['ip', 'route', 'add', '169.254.0.0/16', 
'dev', 'xapi12', 'src', '169.254.0.1']
    Jun  9 09:54:16 Xen3 SM: [13230]   pread SUCCESS
    Jun  9 09:54:19 Xen3 updatempppathd: [15446] The garbage collection routine
    returned: 0 Jun  9 09:54:23 Xen3 SM: [13277] ['ip', 'route', 'del', 
'169.254.0.0/16']
    Jun  9 09:54:23 Xen3 SM: [13277]   pread SUCCESS
    Jun  9 09:54:23 Xen3 SM: [13277] ['ifconfig', 'xapi12', '169.254.0.1', 
'netmask', '255.255.0.0']
    Jun  9 09:54:23 Xen3 SM: [13277]   pread SUCCESS
    Jun  9 09:54:23 Xen3 SM: [13277] ['ip', 'route', 'add', '169.254.0.0/16', 
'dev', 'xapi12', 'src', '169.254.0.1']
    Jun  9 09:54:23 Xen3 SM: [13277]   pread SUCCESS
    
    Jeremy
    
    
    -----Original Message-----
    From: Jeremy Peterson [mailto:jpeter...@acentek.net]
    Sent: Friday, June 9, 2017 9:53 AM
    To: users@cloudstack.apache.org
    Subject: RE: Recreating SystemVM's
    
    I am checking SMlog now on all hosts.
    
    Jeremy
    
    
    -----Original Message-----
    From: Rajani Karuturi [mailto:raj...@apache.org]
    Sent: Friday, June 9, 2017 9:00 AM
    To: Users <users@cloudstack.apache.org>
    Subject: Re: Recreating SystemVM's
    
    on xenserver log, did you check what is causing "
    HOST_CANNOT_ATTACH_NETWORK"?
    
    ~Rajani
    http://cloudplatform.accelerite.com/
    
    On Fri, Jun 9, 2017 at 7:00 PM, Jeremy Peterson <jpeter...@acentek.net>
    wrote:
    
    > 08:28:43        select * from vm_instance where name like 's-%' limit
    > 10000     7481 row(s) returned    0.000 sec / 0.032 sec
    >
    > All vm's 'state' returned Destoryed outside of the current vm 7873 
    > which is in a Stopped state but that goes Destroyed and a new get created.
    >
    > Any other suggestions?
    >
    > Jeremy
    >
    >
    > -----Original Message-----
    > From: Jeremy Peterson [mailto:jpeter...@acentek.net]
    > Sent: Thursday, June 8, 2017 12:47 AM
    > To: users@cloudstack.apache.org
    > Subject: Re: Recreating SystemVM's
    >
    > I'll make that change in the am.
    >
    > Today I put a host in maintence and rebooted because proxy and 
    > secstore vm were constantly being created on that host and still no
    change.
    >
    > Let you know tomorrow.
    >
    > Jeremy
    >
    >
    > Sent from my Verizon, Samsung Galaxy smartphone
    >
    >
    > -------- Original message --------
    > From: Rajani Karuturi <raj...@apache.org>
    > Date: 6/8/17 12:07 AM (GMT-06:00)
    > To: Users <users@cloudstack.apache.org>
    > Subject: Re: Recreating SystemVM's
    >
    > Did you check SMLog on xenserver?
    > unable to destroy task(com.xensource.xenapi.Task@256829a8) on
    > host(b34f086e-fabf-471e-9feb-8f54362d7d0f) due to You gave an invalid 
    > object reference.  The object may have recently been deleted.  The 
    > class parameter gives the type of reference given, and the handle 
    > parameter echoes the bad value given.
    >
    > Looks like Destroy of SSVM failed. What state is SSVM in? mark it as 
    > Destroyed in cloud DB and wait for cloudstack to create a new SSVM.
    >
    > ~Rajani
    > http://cloudplatform.accelerite.com/
    >
    > On Thu, Jun 8, 2017 at 1:11 AM, Jeremy Peterson 
    > <jpeter...@acentek.net>
    > wrote:
    >
    > > Probably agreed.
    > >
    > > But I ran toolstack restart on all hypervisors and v-3193 just tried 
    > > to create and fail along with s-5398.
    > >
    > > The PIF error went away. But VM's are still recreating
    > >
    > > https://pastebin.com/4n4xBgMT
    > >
    > > New log from this afternoon.
    > >
    > > My catalina.out is over 4GB
    > >
    > > Jeremy
    > >
    > >
    > > -----Original Message-----
    > > From: Makrand [mailto:makrandsa...@gmail.com]
    > > Sent: Wednesday, June 7, 2017 12:52 AM
    > > To: users@cloudstack.apache.org
    > > Subject: Re: Recreating SystemVM's
    > >
    > > Hi there,
    > >
    > > Looks more like hypervisor issue.
    > >
    > > Just run *xe-toolstack-restart* on hosts where these VMs are trying 
    > > to start or if you don't have too many hosts, better run on all 
    > > members including master. most of i/o related issues squared off by 
    > > toolstack bounce.
    > >
    > > --
    > > Makrand
    > >
    > >
    > > On Wed, Jun 7, 2017 at 3:01 AM, Jeremy Peterson 
    > > <jpeter...@acentek.net>
    > > wrote:
    > >
    > > > Ok so I pulled this from Sunday morning.
    > > >
    > > > https://pastebin.com/nCETw1sC
    > > >
    > > >
    > > > errorInfo: [HOST_CANNOT_ATTACH_NETWORK, 
    > > > OpaqueRef:65d0c844-bd70-81e9-4518-8809e1dc0ee7,
    > > > OpaqueRef:0093ac3f-9f3a-37e1-9cdb-581398d27ba2]
    > > >
    > > > XenServer error.
    > > >
    > > > Now this still gets me because all of the other VM's launched just
    > fine.
    > > >
    > > > Going into XenCenter I see an error at the bottom This PIF is a 
    > > > bond slave and cannot be plugged.
    > > >
    > > > ???
    > > >
    > > > If I go to networking on the hosts I see the storage vlans and 
    > > > bonds are all there.
    > > >
    > > > I see my GUEST-PUB bond is there and LACP is setup correct.
    > > >
    > > > Any suggestions ?
    > > >
    > > >
    > > > Jeremy
    > > >
    > > >
    > > > -----Original Message-----
    > > > From: Jeremy Peterson [mailto:jpeter...@acentek.net]
    > > > Sent: Tuesday, June 6, 2017 9:23 AM
    > > > To: users@cloudstack.apache.org
    > > > Subject: RE: Recreating SystemVM's
    > > >
    > > > Thank you all for those responses.
    > > >
    > > > I'll comb through my management-server.log and post a pastebin if 
    > > > I'm scratching my head.
    > > >
    > > > Jeremy
    > > >
    > > > -----Original Message-----
    > > > From: Rajani Karuturi [mailto:raj...@apache.org]
    > > > Sent: Tuesday, June 6, 2017 6:53 AM
    > > > To: users@cloudstack.apache.org
    > > > Subject: Re: Recreating SystemVM's
    > > >
    > > > If the zone is enabled, cloudstack should recreate them automatically.
    > > >
    > > > ~ Rajani
    > > >
    > > > http://cloudplatform.accelerite.com/
    > > >
    > > > On June 6, 2017 at 11:37 AM, Erik Weber (terbol...@gmail.com)
    > > > wrote:
    > > >
    > > > CloudStack should recreate automatically, check the mgmt server 
    > > > logs for hints of why it doesn't happen.
    > > >
    > > > --
    > > > Erik
    > > >
    > > > tir. 6. jun. 2017 kl. 04.29 skrev Jeremy Peterson
    > > > <jpeter...@acentek.net>:
    > > >
    > > > I had an issue Sunday morning with cloudstack 4.9.0 and xenserver
    > 6.5.0.
    > > > My hosts stop sending LACP PDU's and caused a network drop to 
    > > > iSCSI primary storage.
    > > >
    > > > So all my instances recovered via HA enabled.
    > > >
    > > > But my console proxy and secondary storage system VM's got stuck 
    > > > in a boot state that would not power on.
    > > >
    > > > At this time they are expunged and gone.
    > > >
    > > > How do I tell cloudstack-management to recreate system VM's?
    > > >
    > > > I'm drawing a blank since deploying CS two years ago and just 
    > > > keeping things running and adding hosts and more storage 
    > > > everything has been so stable.
    > > >
    > > > Jeremy
    > > >
    > >
    >
    
    
    
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