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G Crowe

2017-Jul-23 22:25 UTC

[libvirt-users] Xen died - Fedora upgrade from 21 to 26

Hi,
     I am trying to upgrade my Xen host (Dom0) and are having troubles 
getting it to work.

I think that it has booted into a kernel that supports Xen (running 'xl 
info' does list some Xen capabilities), but I have three problems (that 
I have found so far).

Firstly, the "libvirtd" daemon doesn't start on bootup (and as a
result
all 'virsh' commands fail). It is set to auto-start (systemctl enable 
libvirtd), and can be manually started (systemctl start libvirtd), but 
it will not auto-start on reboot.

Secondly, Once I have manually started libvirtd, when I try to define a 
domain it gives me an error "could not find capabilities for arch=x86_64 
domaintype=xen" and I haven't yet been able to define any domains. This
domain type works fine on Fedora 21.

Thirdly, I am unable to convert to/from xml config format, it gives me 
the error "error: invalid argument: unsupported config type xen-xl" 
however the format "xen-xl" works fine on the Fedora 21 machine.

I had these same issues when I tried to upgrade to Fedora 25 and assumed 
that something had been broken and so abandoned further attempts to 
upgrade, however since Fedora 26 is the same I am now assuming that I 
have stuffed something up myself (or missed something).

Fedora 21 uses kernel 3.19.3 and xen 4.4.1
Fedora 26 uses kernel 4.11.8 and xen 4.8.1

I have tried following the info on 
https://wiki.xen.org/wiki/Fedora_Host_Installation but it appears to be 
out of date now (I used this site when I started using Xen under Fedora 
19, and when I upgraded to Fedora 21)

Does anyone have any suggestions? outputs from "xl info" and the
domain
config are below. I have also tried disabling SELinux, but it made no 
difference.


Thanks

GC

-----------------------------------------------
On the fedora 26 box.....
# xl info
host                   : family.mydomain.mytld
release                : 4.11.8-300.fc26.x86_64
version                : #1 SMP Thu Jun 29 20:09:48 UTC 2017
machine                : x86_64
nr_cpus                : 4
max_cpu_id             : 3
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2712
hw_caps                : 
b7ebfbff:77faf3bf:2c100800:00000121:0000000f:009c67af:00000000:00000100
virt_caps              : hvm hvm_directio
total_memory           : 8072
free_memory            : 128
sharing_freed_memory   : 0
sharing_used_memory    : 0
outstanding_claims     : 0
free_cpus              : 0
xen_major              : 4
xen_minor              : 8
xen_extra              : .1
xen_version            : 4.8.1
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          :
xen_commandline        : placeholder
cc_compiler            : gcc (GCC) 7.0.1 20170421 (Red Hat 7.0.1-0.15)
cc_compile_by          : mockbuild
cc_compile_domain      : [unknown]
cc_compile_date        : Wed May  3 21:23:49 UTC 2017
build_id               : 1c6e5a40165e05837303942b54757ae1f2d5033d
xend_config_format     : 4

---------------------------------------------------
# cat vmtest.xml
<domain type='xen' id='21'>
   <name>testVM</name>
   <memory unit='KiB'>2097152</memory>
   <currentMemory unit='KiB'>2097152</currentMemory>
   <vcpu placement='static'>1</vcpu>
   <os>
     <type arch='x86_64' machine='xenfv'>hvm</type>
     <loader type='rom'>/usr/lib/xen/boot/hvmloader</loader>
     <boot dev='network'/>
   </os>
   <features>
     <acpi/>
     <apic/>
     <pae/>
   </features>
   <clock offset='variable' adjustment='0'
basis='utc'/>
   <on_poweroff>destroy</on_poweroff>
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
     <interface type='bridge'>
       <mac address='02:02:00:03:00:00'/>
       <source bridge='enp1s0'/>
       <script path='vif-bridge'/>
     </interface>
     <serial type='pty'>
       <target port='0'/>
     </serial>
     <console type='pty'>
       <target type='serial' port='0'/>
     </console>
     <input type='mouse' bus='ps2'/>
     <input type='keyboard' bus='ps2'/>
     <graphics type='vnc' port='5901' autoport='no' 
listen='192.168.131.54'>
       <listen type='address' address='192.168.131.54'/>
     </graphics>
   </devices>
</domain>

--------------------------------------

Jim Fehlig

2017-Jul-24 15:20 UTC

head link

Re: [libvirt-users] Xen died - Fedora upgrade from 21 to 26

On 07/23/2017 04:25 PM, G Crowe wrote:> Hi,
>      I am trying to upgrade my Xen host (Dom0) and are having troubles
getting
> it to work.
> 
> I think that it has booted into a kernel that supports Xen (running 'xl
info'
> does list some Xen capabilities), but I have three problems (that I have
found
> so far).
> 
> Firstly, the "libvirtd" daemon doesn't start on bootup (and
as a result all
> 'virsh' commands fail). It is set to auto-start (systemctl enable
libvirtd), and
> can be manually started (systemctl start libvirtd), but it will not
auto-start
> on reboot.
> 
> Secondly, Once I have manually started libvirtd, when I try to define a
domain
> it gives me an error "could not find capabilities for arch=x86_64 
> domaintype=xen" and I haven't yet been able to define any domains.
This domain
> type works fine on Fedora 21.
> 
> Thirdly, I am unable to convert to/from xml config format, it gives me the
error
> "error: invalid argument: unsupported config type xen-xl" however
the format
> "xen-xl" works fine on the Fedora 21 machine.
It sounds like the libvirt libxl driver is not loaded. Is the 
libvirt-daemon-driver-libxl package installed? If it's installed, enabling
debug
logging in libvirtd can provide hints why it is not loading

http://libvirt.org/logging.html

Regards,
Jim
> 
> I had these same issues when I tried to upgrade to Fedora 25 and assumed
that
> something had been broken and so abandoned further attempts to upgrade,
however
> since Fedora 26 is the same I am now assuming that I have stuffed something
up
> myself (or missed something).
> 
> Fedora 21 uses kernel 3.19.3 and xen 4.4.1
> Fedora 26 uses kernel 4.11.8 and xen 4.8.1
> 
> I have tried following the info on 
> https://wiki.xen.org/wiki/Fedora_Host_Installation but it appears to be out
of
> date now (I used this site when I started using Xen under Fedora 19, and
when I
> upgraded to Fedora 21)
> 
> Does anyone have any suggestions? outputs from "xl info" and the
domain config
> are below. I have also tried disabling SELinux, but it made no difference.
> 
> 
> Thanks
> 
> GC
> 
> -----------------------------------------------
> On the fedora 26 box.....
> # xl info
> host                   : family.mydomain.mytld
> release                : 4.11.8-300.fc26.x86_64
> version                : #1 SMP Thu Jun 29 20:09:48 UTC 2017
> machine                : x86_64
> nr_cpus                : 4
> max_cpu_id             : 3
> nr_nodes               : 1
> cores_per_socket       : 4
> threads_per_core       : 1
> cpu_mhz                : 2712
> hw_caps                : 
> b7ebfbff:77faf3bf:2c100800:00000121:0000000f:009c67af:00000000:00000100
> virt_caps              : hvm hvm_directio
> total_memory           : 8072
> free_memory            : 128
> sharing_freed_memory   : 0
> sharing_used_memory    : 0
> outstanding_claims     : 0
> free_cpus              : 0
> xen_major              : 4
> xen_minor              : 8
> xen_extra              : .1
> xen_version            : 4.8.1
> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 
> hvm-3.0-x86_32p hvm-3.0-x86_64
> xen_scheduler          : credit
> xen_pagesize           : 4096
> platform_params        : virt_start=0xffff800000000000
> xen_changeset          :
> xen_commandline        : placeholder
> cc_compiler            : gcc (GCC) 7.0.1 20170421 (Red Hat 7.0.1-0.15)
> cc_compile_by          : mockbuild
> cc_compile_domain      : [unknown]
> cc_compile_date        : Wed May  3 21:23:49 UTC 2017
> build_id               : 1c6e5a40165e05837303942b54757ae1f2d5033d
> xend_config_format     : 4
> 
> ---------------------------------------------------
> # cat vmtest.xml
> <domain type='xen' id='21'>
>    <name>testVM</name>
>    <memory unit='KiB'>2097152</memory>
>    <currentMemory unit='KiB'>2097152</currentMemory>
>    <vcpu placement='static'>1</vcpu>
>    <os>
>      <type arch='x86_64'
machine='xenfv'>hvm</type>
>      <loader
type='rom'>/usr/lib/xen/boot/hvmloader</loader>
>      <boot dev='network'/>
>    </os>
>    <features>
>      <acpi/>
>      <apic/>
>      <pae/>
>    </features>
>    <clock offset='variable' adjustment='0'
basis='utc'/>
>    <on_poweroff>destroy</on_poweroff>
>    <on_reboot>restart</on_reboot>
>    <on_crash>restart</on_crash>
>    <devices>
>      <interface type='bridge'>
>        <mac address='02:02:00:03:00:00'/>
>        <source bridge='enp1s0'/>
>        <script path='vif-bridge'/>
>      </interface>
>      <serial type='pty'>
>        <target port='0'/>
>      </serial>
>      <console type='pty'>
>        <target type='serial' port='0'/>
>      </console>
>      <input type='mouse' bus='ps2'/>
>      <input type='keyboard' bus='ps2'/>
>      <graphics type='vnc' port='5901'
autoport='no' listen='192.168.131.54'>
>        <listen type='address'
address='192.168.131.54'/>
>      </graphics>
>    </devices>
> </domain>
> 
> --------------------------------------
> 
> _______________________________________________
> libvirt-users mailing list
> libvirt-users@redhat.com
> https://www.redhat.com/mailman/listinfo/libvirt-users
>

G Crowe

2017-Jul-26 10:46 UTC

head link

Re: [libvirt-users] Xen died - Fedora upgrade from 21 to 26

Jim,
     Thanks for that, I had manually installed 
libvirt-daemon-driver-xen, but also needed to install 
libvirt-daemon-driver-libxl. I can now create VMs and convert config 
formats.

However the daemon still fails to start on bootup. It starts fine when I 
manually start it with "systemctl start libvirtd" but setting it to 
autostart with "systemctl enable libvirtd" seems to have no effect.
When
I look at the status, it tells me that the service is "enabled" which 
means that it starts on bootup (well, that's what it means for any other 
service).

This is rather critical on this PC, as it has unattended restarts and 
the VPN/routing is done in one of the VMs (i.e. I can't get to it unless 
it auto-starts at least one VM).

Unfortunatley there is nothing appearing in the libvirtd log over a 
reboot to help diagnose.

Any suggestions?


Thank you

GC


[root@testhost ~]# systemctl status libvirtd
● libvirtd.service - Virtualization daemon
    Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; 
vendor preset: enabled)
    Active: inactive (dead)
      Docs: man:libvirtd(8)
            http://libvirt.org




On 25/07/2017 1:20 AM, Jim Fehlig wrote:> On 07/23/2017 04:25 PM, G Crowe wrote:
>> Hi,
>>      I am trying to upgrade my Xen host (Dom0) and are having 
>> troubles getting it to work.
>>
>> I think that it has booted into a kernel that supports Xen (running 
>> 'xl info' does list some Xen capabilities), but I have three
problems
>> (that I have found so far).
>>
>> Firstly, the "libvirtd" daemon doesn't start on bootup
(and as a
>> result all 'virsh' commands fail). It is set to auto-start
(systemctl
>> enable libvirtd), and can be manually started (systemctl start 
>> libvirtd), but it will not auto-start on reboot.
>>
>> Secondly, Once I have manually started libvirtd, when I try to define 
>> a domain it gives me an error "could not find capabilities for 
>> arch=x86_64 domaintype=xen" and I haven't yet been able to
define any
>> domains. This domain type works fine on Fedora 21.
>>
>> Thirdly, I am unable to convert to/from xml config format, it gives 
>> me the error "error: invalid argument: unsupported config type 
>> xen-xl" however the format "xen-xl" works fine on the
Fedora 21 machine.
>
> It sounds like the libvirt libxl driver is not loaded. Is the 
> libvirt-daemon-driver-libxl package installed? If it's installed, 
> enabling debug logging in libvirtd can provide hints why it is not 
> loading
>
> http://libvirt.org/logging.html
>
> Regards,
> Jim
>
>>
>> I had these same issues when I tried to upgrade to Fedora 25 and 
>> assumed that something had been broken and so abandoned further 
>> attempts to upgrade, however since Fedora 26 is the same I am now 
>> assuming that I have stuffed something up myself (or missed something).
>>
>> Fedora 21 uses kernel 3.19.3 and xen 4.4.1
>> Fedora 26 uses kernel 4.11.8 and xen 4.8.1
>>
>> I have tried following the info on 
>> https://wiki.xen.org/wiki/Fedora_Host_Installation but it appears to 
>> be out of date now (I used this site when I started using Xen under 
>> Fedora 19, and when I upgraded to Fedora 21)
>>
>> Does anyone have any suggestions? outputs from "xl info" and
the
>> domain config are below. I have also tried disabling SELinux, but it 
>> made no difference.
>>
>>
>> Thanks
>>
>> GC
>>
>> -----------------------------------------------
>> On the fedora 26 box.....
>> # xl info
>> host                   : family.mydomain.mytld
>> release                : 4.11.8-300.fc26.x86_64
>> version                : #1 SMP Thu Jun 29 20:09:48 UTC 2017
>> machine                : x86_64
>> nr_cpus                : 4
>> max_cpu_id             : 3
>> nr_nodes               : 1
>> cores_per_socket       : 4
>> threads_per_core       : 1
>> cpu_mhz                : 2712
>> hw_caps                : 
>> b7ebfbff:77faf3bf:2c100800:00000121:0000000f:009c67af:00000000:00000100
>> virt_caps              : hvm hvm_directio
>> total_memory           : 8072
>> free_memory            : 128
>> sharing_freed_memory   : 0
>> sharing_used_memory    : 0
>> outstanding_claims     : 0
>> free_cpus              : 0
>> xen_major              : 4
>> xen_minor              : 8
>> xen_extra              : .1
>> xen_version            : 4.8.1
>> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p 
>> hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
>> xen_scheduler          : credit
>> xen_pagesize           : 4096
>> platform_params        : virt_start=0xffff800000000000
>> xen_changeset          :
>> xen_commandline        : placeholder
>> cc_compiler            : gcc (GCC) 7.0.1 20170421 (Red Hat 7.0.1-0.15)
>> cc_compile_by          : mockbuild
>> cc_compile_domain      : [unknown]
>> cc_compile_date        : Wed May  3 21:23:49 UTC 2017
>> build_id               : 1c6e5a40165e05837303942b54757ae1f2d5033d
>> xend_config_format     : 4
>>
>> ---------------------------------------------------
>> # cat vmtest.xml
>> <domain type='xen' id='21'>
>>    <name>testVM</name>
>>    <memory unit='KiB'>2097152</memory>
>>    <currentMemory
unit='KiB'>2097152</currentMemory>
>>    <vcpu placement='static'>1</vcpu>
>>    <os>
>>      <type arch='x86_64'
machine='xenfv'>hvm</type>
>>      <loader
type='rom'>/usr/lib/xen/boot/hvmloader</loader>
>>      <boot dev='network'/>
>>    </os>
>>    <features>
>>      <acpi/>
>>      <apic/>
>>      <pae/>
>>    </features>
>>    <clock offset='variable' adjustment='0'
basis='utc'/>
>>    <on_poweroff>destroy</on_poweroff>
>>    <on_reboot>restart</on_reboot>
>>    <on_crash>restart</on_crash>
>>    <devices>
>>      <interface type='bridge'>
>>        <mac address='02:02:00:03:00:00'/>
>>        <source bridge='enp1s0'/>
>>        <script path='vif-bridge'/>
>>      </interface>
>>      <serial type='pty'>
>>        <target port='0'/>
>>      </serial>
>>      <console type='pty'>
>>        <target type='serial' port='0'/>
>>      </console>
>>      <input type='mouse' bus='ps2'/>
>>      <input type='keyboard' bus='ps2'/>
>>      <graphics type='vnc' port='5901'
autoport='no'
>> listen='192.168.131.54'>
>>        <listen type='address'
address='192.168.131.54'/>
>>      </graphics>
>>    </devices>
>> </domain>
>>
>> --------------------------------------
>>
>> _______________________________________________
>> libvirt-users mailing list
>> libvirt-users@redhat.com
>> https://www.redhat.com/mailman/listinfo/libvirt-users
>>
>

Dominik Psenner

2017-Jul-26 13:32 UTC

head link

Re: [libvirt-users] Xen died - Fedora upgrade from 21 to 26

Note that this does not help with the original problem but points out a
critical design flaw.

To me your it infrastructure design has no working disaster recovery plan.
You should always be able to access critical functionality and from there
be able to restore complete functionality step by step. In your case the
outermost functionality is the vm host. You should always be able to log
into that machine once it has all cables plugged in, regardless of what
runs on it (or not).

This means that even though you might get this to work you should rethink
your design so that you do not have to rely on the vm that does the
networking.

On 26 Jul 2017 12:50 p.m., "G Crowe" <gclvirtlist@crowie.net>
wrote:

Jim,
    Thanks for that, I had manually installed libvirt-daemon-driver-xen,
but also needed to install libvirt-daemon-driver-libxl. I can now create
VMs and convert config formats.

However the daemon still fails to start on bootup. It starts fine when I
manually start it with "systemctl start libvirtd" but setting it to
autostart with "systemctl enable libvirtd" seems to have no effect.
When I
look at the status, it tells me that the service is "enabled" which
means
that it starts on bootup (well, that's what it means for any other service).

This is rather critical on this PC, as it has unattended restarts and the
VPN/routing is done in one of the VMs (i.e. I can't get to it unless it
auto-starts at least one VM).

Unfortunatley there is nothing appearing in the libvirtd log over a reboot
to help diagnose.

Any suggestions?


Thank you

GC


[root@testhost ~]# systemctl status libvirtd
● libvirtd.service - Virtualization daemon
   Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled;
vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:libvirtd(8)
           http://libvirt.org





On 25/07/2017 1:20 AM, Jim Fehlig wrote:
> On 07/23/2017 04:25 PM, G Crowe wrote:
>
>> Hi,
>>      I am trying to upgrade my Xen host (Dom0) and are having troubles
>> getting it to work.
>>
>> I think that it has booted into a kernel that supports Xen (running
'xl
>> info' does list some Xen capabilities), but I have three problems
(that I
>> have found so far).
>>
>> Firstly, the "libvirtd" daemon doesn't start on bootup
(and as a result
>> all 'virsh' commands fail). It is set to auto-start (systemctl
enable
>> libvirtd), and can be manually started (systemctl start libvirtd), but
it
>> will not auto-start on reboot.
>>
>> Secondly, Once I have manually started libvirtd, when I try to define a
>> domain it gives me an error "could not find capabilities for
arch=x86_64
>> domaintype=xen" and I haven't yet been able to define any
domains. This
>> domain type works fine on Fedora 21.
>>
>> Thirdly, I am unable to convert to/from xml config format, it gives me
>> the error "error: invalid argument: unsupported config type
xen-xl" however
>> the format "xen-xl" works fine on the Fedora 21 machine.
>>
>
> It sounds like the libvirt libxl driver is not loaded. Is the
> libvirt-daemon-driver-libxl package installed? If it's installed,
enabling
> debug logging in libvirtd can provide hints why it is not loading
>
> http://libvirt.org/logging.html
>
> Regards,
> Jim
>
>
>> I had these same issues when I tried to upgrade to Fedora 25 and
assumed
>> that something had been broken and so abandoned further attempts to
>> upgrade, however since Fedora 26 is the same I am now assuming that I
have
>> stuffed something up myself (or missed something).
>>
>> Fedora 21 uses kernel 3.19.3 and xen 4.4.1
>> Fedora 26 uses kernel 4.11.8 and xen 4.8.1
>>
>> I have tried following the info on https://wiki.xen.org/wiki/Fedo
>> ra_Host_Installation but it appears to be out of date now (I used this
>> site when I started using Xen under Fedora 19, and when I upgraded to
>> Fedora 21)
>>
>> Does anyone have any suggestions? outputs from "xl info" and
the domain
>> config are below. I have also tried disabling SELinux, but it made no
>> difference.
>>
>>
>> Thanks
>>
>> GC
>>
>> -----------------------------------------------
>> On the fedora 26 box.....
>> # xl info
>> host                   : family.mydomain.mytld
>> release                : 4.11.8-300.fc26.x86_64
>> version                : #1 SMP Thu Jun 29 20:09:48 UTC 2017
>> machine                : x86_64
>> nr_cpus                : 4
>> max_cpu_id             : 3
>> nr_nodes               : 1
>> cores_per_socket       : 4
>> threads_per_core       : 1
>> cpu_mhz                : 2712
>> hw_caps                : b7ebfbff:77faf3bf:2c100800:000
>> 00121:0000000f:009c67af:00000000:00000100
>> virt_caps              : hvm hvm_directio
>> total_memory           : 8072
>> free_memory            : 128
>> sharing_freed_memory   : 0
>> sharing_used_memory    : 0
>> outstanding_claims     : 0
>> free_cpus              : 0
>> xen_major              : 4
>> xen_minor              : 8
>> xen_extra              : .1
>> xen_version            : 4.8.1
>> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
>> hvm-3.0-x86_32p hvm-3.0-x86_64
>> xen_scheduler          : credit
>> xen_pagesize           : 4096
>> platform_params        : virt_start=0xffff800000000000
>> xen_changeset          :
>> xen_commandline        : placeholder
>> cc_compiler            : gcc (GCC) 7.0.1 20170421 (Red Hat 7.0.1-0.15)
>> cc_compile_by          : mockbuild
>> cc_compile_domain      : [unknown]
>> cc_compile_date        : Wed May  3 21:23:49 UTC 2017
>> build_id               : 1c6e5a40165e05837303942b54757ae1f2d5033d
>> xend_config_format     : 4
>>
>> ---------------------------------------------------
>> # cat vmtest.xml
>> <domain type='xen' id='21'>
>>    <name>testVM</name>
>>    <memory unit='KiB'>2097152</memory>
>>    <currentMemory
unit='KiB'>2097152</currentMemory>
>>    <vcpu placement='static'>1</vcpu>
>>    <os>
>>      <type arch='x86_64'
machine='xenfv'>hvm</type>
>>      <loader
type='rom'>/usr/lib/xen/boot/hvmloader</loader>
>>      <boot dev='network'/>
>>    </os>
>>    <features>
>>      <acpi/>
>>      <apic/>
>>      <pae/>
>>    </features>
>>    <clock offset='variable' adjustment='0'
basis='utc'/>
>>    <on_poweroff>destroy</on_poweroff>
>>    <on_reboot>restart</on_reboot>
>>    <on_crash>restart</on_crash>
>>    <devices>
>>      <interface type='bridge'>
>>        <mac address='02:02:00:03:00:00'/>
>>        <source bridge='enp1s0'/>
>>        <script path='vif-bridge'/>
>>      </interface>
>>      <serial type='pty'>
>>        <target port='0'/>
>>      </serial>
>>      <console type='pty'>
>>        <target type='serial' port='0'/>
>>      </console>
>>      <input type='mouse' bus='ps2'/>
>>      <input type='keyboard' bus='ps2'/>
>>      <graphics type='vnc' port='5901'
autoport='no'
>> listen='192.168.131.54'>
>>        <listen type='address'
address='192.168.131.54'/>
>>      </graphics>
>>    </devices>
>> </domain>
>>
>> --------------------------------------
>>
>> _______________________________________________
>> libvirt-users mailing list
>> libvirt-users@redhat.com
>> https://www.redhat.com/mailman/listinfo/libvirt-users
>>
>>
>_______________________________________________
libvirt-users mailing list
libvirt-users@redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-users

Alvin Starr

2017-Jul-26 14:28 UTC

head link

Re: [libvirt-users] Xen died - Fedora upgrade from 21 to 26

G Crowe

2017-Jul-26 22:27 UTC

head link

Re: [libvirt-users] Xen died - Fedora upgrade from 21 to 26

Alvin,
     Thanks for that. I disabled the xendomains service (I had to do it 
twice, as it seemed to re-enable itself after the first reboot) and it 
now starts libvirtd automatically on startup.

However, all is not well!
"xl list" and "virsh list" will just hang
"systemctl stop libvirtd" just hangs and after this "ps aux"
lists the
process as defunct
     root       673  0.0  0.0      0     0 ?        Zsl  08:04   0:00 
[libvirtd] <defunct>
"kill -KILL 673" has no effect
"shutdown -r now" also hangs (I have to physically power off the 
machine) irrespectively of whether I have tried to stop the service 
before shutdown or not.

None of this happened yesterday when I manually started libvirtd after 
bootup (when xendomains was still running).

The logs show nothing in error or warning category, just a heap of info 
(I have the logs set to level 2). Is there anything in particular that I 
should be looking for in the logs?



Regarding the use of a VM to access the host in a remote location... I 
had considered this and there was little choice. The machine is on the 
end of a VDSL line and was installed to consolidate a few servers in 
that location in order to save power. I figured that automatically 
starting a VM that ran the networking was not much more risk than a 
physical server that had to start up its networking, and that has (so 
far) proven to be true with all of the remote restarts & power outages 
to date. The only other option is an expensive second link to the host, 
and I've decided to live with the possibility of having to talk someone 
through a restart over the phone rather than go down that route.

Interestingly, with the NBN in Australia (the country-wide rollout of 
fibre or broadband to every premises) they have effectively converted 
all our phone lines to VoIP. This has resulted in the old physical 
landline now requiring one of the VMs to be running as well, so if I 
ever need to talk someone through a restart it will need to be on a 
mobile phone.


Thank you

GC


On 27/07/2017 5:47 AM, Alvin Starr wrote:> I addressed the fix to Jim but I should have addressed it to you.
>
>
> Try systemctl disable xendomains.service
>
> It is conflicting with libvirtd.service.
> I found it by using
> "systemd-analyze  dot libvirtd.service | dot -Tgif >
/tmp/dot1.gif"
>
>
> It looks like libvirt-daemon-driver-xen or 
> libvirt-daemon-driver-libxl  should  disable the xendomains.service
>
>
> On 07/26/2017 06:46 AM, G Crowe wrote:
>> Jim,
>>     Thanks for that, I had manually installed 
>> libvirt-daemon-driver-xen, but also needed to install 
>> libvirt-daemon-driver-libxl. I can now create VMs and convert config 
>> formats.
>>
>> However the daemon still fails to start on bootup. It starts fine 
>> when I manually start it with "systemctl start libvirtd" but
setting
>> it to autostart with "systemctl enable libvirtd" seems to
have no
>> effect. When I look at the status, it tells me that the service is 
>> "enabled" which means that it starts on bootup (well,
that's what it
>> means for any other service).
>>
>> This is rather critical on this PC, as it has unattended restarts and 
>> the VPN/routing is done in one of the VMs (i.e. I can't get to it 
>> unless it auto-starts at least one VM).
>>
>> Unfortunatley there is nothing appearing in the libvirtd log over a 
>> reboot to help diagnose.
>>
>> Any suggestions?
>>
>>
>> Thank you
>>
>> GC
>>
>>
>> [root@testhost ~]# systemctl status libvirtd
>> ● libvirtd.service - Virtualization daemon
>>    Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; 
>> vendor preset: enabled)
>>    Active: inactive (dead)
>>      Docs: man:libvirtd(8)
>>            http://libvirt.org
>>
>>
>>
>>
>> On 25/07/2017 1:20 AM, Jim Fehlig wrote:
>>> On 07/23/2017 04:25 PM, G Crowe wrote:
>>>> Hi,
>>>>      I am trying to upgrade my Xen host (Dom0) and are having 
>>>> troubles getting it to work.
>>>>
>>>> I think that it has booted into a kernel that supports Xen
(running
>>>> 'xl info' does list some Xen capabilities), but I have
three
>>>> problems (that I have found so far).
>>>>
>>>> Firstly, the "libvirtd" daemon doesn't start on
bootup (and as a
>>>> result all 'virsh' commands fail). It is set to
auto-start
>>>> (systemctl enable libvirtd), and can be manually started
(systemctl
>>>> start libvirtd), but it will not auto-start on reboot.
>>>>
>>>> Secondly, Once I have manually started libvirtd, when I try to 
>>>> define a domain it gives me an error "could not find
capabilities
>>>> for arch=x86_64 domaintype=xen" and I haven't yet been
able to
>>>> define any domains. This domain type works fine on Fedora 21.
>>>>
>>>> Thirdly, I am unable to convert to/from xml config format, it
gives
>>>> me the error "error: invalid argument: unsupported config
type
>>>> xen-xl" however the format "xen-xl" works fine
on the Fedora 21
>>>> machine.
>>>
>>> It sounds like the libvirt libxl driver is not loaded. Is the 
>>> libvirt-daemon-driver-libxl package installed? If it's
installed,
>>> enabling debug logging in libvirtd can provide hints why it is not 
>>> loading
>>>
>>> http://libvirt.org/logging.html
>>>
>>> Regards,
>>> Jim
>>>
>>>>
>>>> I had these same issues when I tried to upgrade to Fedora 25
and
>>>> assumed that something had been broken and so abandoned further
>>>> attempts to upgrade, however since Fedora 26 is the same I am
now
>>>> assuming that I have stuffed something up myself (or missed 
>>>> something).
>>>>
>>>> Fedora 21 uses kernel 3.19.3 and xen 4.4.1
>>>> Fedora 26 uses kernel 4.11.8 and xen 4.8.1
>>>>
>>>> I have tried following the info on 
>>>> https://wiki.xen.org/wiki/Fedora_Host_Installation but it
appears
>>>> to be out of date now (I used this site when I started using
Xen
>>>> under Fedora 19, and when I upgraded to Fedora 21)
>>>>
>>>> Does anyone have any suggestions? outputs from "xl
info" and the
>>>> domain config are below. I have also tried disabling SELinux,
but
>>>> it made no difference.
>>>>
>>>>
>>>> Thanks
>>>>
>>>> GC
>>>>
>>>> -----------------------------------------------
>>>> On the fedora 26 box.....
>>>> # xl info
>>>> host                   : family.mydomain.mytld
>>>> release                : 4.11.8-300.fc26.x86_64
>>>> version                : #1 SMP Thu Jun 29 20:09:48 UTC 2017
>>>> machine                : x86_64
>>>> nr_cpus                : 4
>>>> max_cpu_id             : 3
>>>> nr_nodes               : 1
>>>> cores_per_socket       : 4
>>>> threads_per_core       : 1
>>>> cpu_mhz                : 2712
>>>> hw_caps                : 
>>>>
b7ebfbff:77faf3bf:2c100800:00000121:0000000f:009c67af:00000000:00000100
>>>>
>>>> virt_caps              : hvm hvm_directio
>>>> total_memory           : 8072
>>>> free_memory            : 128
>>>> sharing_freed_memory   : 0
>>>> sharing_used_memory    : 0
>>>> outstanding_claims     : 0
>>>> free_cpus              : 0
>>>> xen_major              : 4
>>>> xen_minor              : 8
>>>> xen_extra              : .1
>>>> xen_version            : 4.8.1
>>>> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p 
>>>> hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
>>>> xen_scheduler          : credit
>>>> xen_pagesize           : 4096
>>>> platform_params        : virt_start=0xffff800000000000
>>>> xen_changeset          :
>>>> xen_commandline        : placeholder
>>>> cc_compiler            : gcc (GCC) 7.0.1 20170421 (Red Hat
7.0.1-0.15)
>>>> cc_compile_by          : mockbuild
>>>> cc_compile_domain      : [unknown]
>>>> cc_compile_date        : Wed May  3 21:23:49 UTC 2017
>>>> build_id               :
1c6e5a40165e05837303942b54757ae1f2d5033d
>>>> xend_config_format     : 4
>>>>
>>>> ---------------------------------------------------
>>>> # cat vmtest.xml
>>>> <domain type='xen' id='21'>
>>>>    <name>testVM</name>
>>>>    <memory unit='KiB'>2097152</memory>
>>>>    <currentMemory
unit='KiB'>2097152</currentMemory>
>>>>    <vcpu placement='static'>1</vcpu>
>>>>    <os>
>>>>      <type arch='x86_64'
machine='xenfv'>hvm</type>
>>>>      <loader
type='rom'>/usr/lib/xen/boot/hvmloader</loader>
>>>>      <boot dev='network'/>
>>>>    </os>
>>>>    <features>
>>>>      <acpi/>
>>>>      <apic/>
>>>>      <pae/>
>>>>    </features>
>>>>    <clock offset='variable' adjustment='0'
basis='utc'/>
>>>>    <on_poweroff>destroy</on_poweroff>
>>>>    <on_reboot>restart</on_reboot>
>>>>    <on_crash>restart</on_crash>
>>>>    <devices>
>>>>      <interface type='bridge'>
>>>>        <mac address='02:02:00:03:00:00'/>
>>>>        <source bridge='enp1s0'/>
>>>>        <script path='vif-bridge'/>
>>>>      </interface>
>>>>      <serial type='pty'>
>>>>        <target port='0'/>
>>>>      </serial>
>>>>      <console type='pty'>
>>>>        <target type='serial' port='0'/>
>>>>      </console>
>>>>      <input type='mouse' bus='ps2'/>
>>>>      <input type='keyboard' bus='ps2'/>
>>>>      <graphics type='vnc' port='5901'
autoport='no'
>>>> listen='192.168.131.54'>
>>>>        <listen type='address'
address='192.168.131.54'/>
>>>>      </graphics>
>>>>    </devices>
>>>> </domain>
>>>>
>>>> --------------------------------------
>>>>
>>>> _______________________________________________
>>>> libvirt-users mailing list
>>>> libvirt-users@redhat.com
>>>> https://www.redhat.com/mailman/listinfo/libvirt-users
>>>>
>>>
>>
>> _______________________________________________
>> libvirt-users mailing list
>> libvirt-users@redhat.com
>> https://www.redhat.com/mailman/listinfo/libvirt-users
>

G Crowe

2017-Jul-27 11:16 UTC

head link

Re: [libvirt-users] Xen died - Fedora upgrade from 21 to 26

My server was installed as a "minimal install" in text mode, so there 
may be some difference between my setup and your laptop. Are you able to 
email the output of "systemctl list-unit-files" to me so that I can
see
what services are enabled?

I tried installing a couple of the other drivers mentioned in the log 
file...
# dnf install libvirt-daemon-driver-lxc
# dnf install libvirt-daemon-driver-uml
# dnf install libvirt-daemon-driver-vbox
But this made no difference.

I then tried disabling xenconsole.service, which fixed some things and 
broke others.
- reboots now work (I don't have to hard power cycle - it was locking up 
when trying to kill both the libvirtd and the xenconsole services)
- "virsh list" now works (shows an empty list)
- "xl list" now gives an error instead of just locking up (the same 
error as if libvirtd wasn't running - see below).
- "virsh define vmtest.xml" now gives an error (the same error that it
gave before I installed libvirt-daemon-driver-libxl - see below)
- libvirtd.service starts fine on bootup. Manually restarting libvirtd 
does not resolve the above problems.

Note that on my Fedora 21 machine, it has libvirtd.service and 
xendomains.service and xenconsoled.service all running simultaneously, 
and it has been running for years without issues (even on reboots)

Is there any documentation on what needs to be installed and/or running 
to use Xen, and what conflicts?

Or is there any documentation on how Xen should be installed for the 
current version of Fedora?


Thank you

GC


# virsh define vmtest.xml
error: Failed to define domain from vmtest.xml
error: invalid argument: could not find capabilities for arch=x86_64 
domaintype=xen

# xl list
xencall: error: Could not obtain handle on privileged command interface: 
No such file or directory
libxl: error: libxl.c:108:libxl_ctx_alloc: cannot open libxc handle: No 
such file or directory
cannot init xl context




On 27/07/2017 11:40 AM, Alvin Starr wrote:> I just tried my laptop and booted xen and can virsh list and xl seem 
> to work.
>
>
> On 07/26/2017 06:27 PM, G Crowe wrote:
>> Alvin,
>>     Thanks for that. I disabled the xendomains service (I had to do 
>> it twice, as it seemed to re-enable itself after the first reboot) 
>> and it now starts libvirtd automatically on startup.
>>
>> However, all is not well!
>> "xl list" and "virsh list" will just hang
>> "systemctl stop libvirtd" just hangs and after this "ps
aux" lists
>> the process as defunct
>>     root       673  0.0  0.0      0     0 ?        Zsl  08:04 0:00 
>> [libvirtd] <defunct>
>> "kill -KILL 673" has no effect
>> "shutdown -r now" also hangs (I have to physically power off
the
>> machine) irrespectively of whether I have tried to stop the service 
>> before shutdown or not.
>>
>> None of this happened yesterday when I manually started libvirtd 
>> after bootup (when xendomains was still running).
>>
>> The logs show nothing in error or warning category, just a heap of 
>> info (I have the logs set to level 2). Is there anything in 
>> particular that I should be looking for in the logs?
>>
>>
>>
>> Regarding the use of a VM to access the host in a remote location... 
>> I had considered this and there was little choice. The machine is on 
>> the end of a VDSL line and was installed to consolidate a few servers 
>> in that location in order to save power. I figured that automatically 
>> starting a VM that ran the networking was not much more risk than a 
>> physical server that had to start up its networking, and that has (so 
>> far) proven to be true with all of the remote restarts & power 
>> outages to date. The only other option is an expensive second link to 
>> the host, and I've decided to live with the possibility of having
to
>> talk someone through a restart over the phone rather than go down 
>> that route.
>>
>> Interestingly, with the NBN in Australia (the country-wide rollout of 
>> fibre or broadband to every premises) they have effectively converted 
>> all our phone lines to VoIP. This has resulted in the old physical 
>> landline now requiring one of the VMs to be running as well, so if I 
>> ever need to talk someone through a restart it will need to be on a 
>> mobile phone.
>>
>>
>> Thank you
>>
>> GC
>>
>>
>> On 27/07/2017 5:47 AM, Alvin Starr wrote:
>>> I addressed the fix to Jim but I should have addressed it to you.
>>>
>>>
>>> Try systemctl disable xendomains.service
>>>
>>> It is conflicting with libvirtd.service.
>>> I found it by using
>>> "systemd-analyze  dot libvirtd.service | dot -Tgif >
/tmp/dot1.gif"
>>>
>>>
>>> It looks like libvirt-daemon-driver-xen or 
>>> libvirt-daemon-driver-libxl  should  disable the xendomains.service
>>>
>>>
>>> On 07/26/2017 06:46 AM, G Crowe wrote:
>>>> Jim,
>>>>     Thanks for that, I had manually installed 
>>>> libvirt-daemon-driver-xen, but also needed to install 
>>>> libvirt-daemon-driver-libxl. I can now create VMs and convert 
>>>> config formats.
>>>>
>>>> However the daemon still fails to start on bootup. It starts
fine
>>>> when I manually start it with "systemctl start
libvirtd" but
>>>> setting it to autostart with "systemctl enable
libvirtd" seems to
>>>> have no effect. When I look at the status, it tells me that the
>>>> service is "enabled" which means that it starts on
bootup (well,
>>>> that's what it means for any other service).
>>>>
>>>> This is rather critical on this PC, as it has unattended
restarts
>>>> and the VPN/routing is done in one of the VMs (i.e. I can't
get to
>>>> it unless it auto-starts at least one VM).
>>>>
>>>> Unfortunatley there is nothing appearing in the libvirtd log
over a
>>>> reboot to help diagnose.
>>>>
>>>> Any suggestions?
>>>>
>>>>
>>>> Thank you
>>>>
>>>> GC
>>>>
>>>>
>>>> [root@testhost ~]# systemctl status libvirtd
>>>> ● libvirtd.service - Virtualization daemon
>>>>    Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; 
>>>> enabled; vendor preset: enabled)
>>>>    Active: inactive (dead)
>>>>      Docs: man:libvirtd(8)
>>>>            http://libvirt.org
>>>>
>>>>
>>>>
>>>>
>>>> On 25/07/2017 1:20 AM, Jim Fehlig wrote:
>>>>> On 07/23/2017 04:25 PM, G Crowe wrote:
>>>>>> Hi,
>>>>>>      I am trying to upgrade my Xen host (Dom0) and are
having
>>>>>> troubles getting it to work.
>>>>>>
>>>>>> I think that it has booted into a kernel that supports
Xen
>>>>>> (running 'xl info' does list some Xen
capabilities), but I have
>>>>>> three problems (that I have found so far).
>>>>>>
>>>>>> Firstly, the "libvirtd" daemon doesn't
start on bootup (and as a
>>>>>> result all 'virsh' commands fail). It is set to
auto-start
>>>>>> (systemctl enable libvirtd), and can be manually
started
>>>>>> (systemctl start libvirtd), but it will not auto-start
on reboot.
>>>>>>
>>>>>> Secondly, Once I have manually started libvirtd, when I
try to
>>>>>> define a domain it gives me an error "could not
find capabilities
>>>>>> for arch=x86_64 domaintype=xen" and I haven't
yet been able to
>>>>>> define any domains. This domain type works fine on
Fedora 21.
>>>>>>
>>>>>> Thirdly, I am unable to convert to/from xml config
format, it
>>>>>> gives me the error "error: invalid argument:
unsupported config
>>>>>> type xen-xl" however the format "xen-xl"
works fine on the Fedora
>>>>>> 21 machine.
>>>>>
>>>>> It sounds like the libvirt libxl driver is not loaded. Is
the
>>>>> libvirt-daemon-driver-libxl package installed? If it's
installed,
>>>>> enabling debug logging in libvirtd can provide hints why it
is not
>>>>> loading
>>>>>
>>>>> http://libvirt.org/logging.html
>>>>>
>>>>> Regards,
>>>>> Jim
>>>>>
>>>>>>
>>>>>> I had these same issues when I tried to upgrade to
Fedora 25 and
>>>>>> assumed that something had been broken and so abandoned
further
>>>>>> attempts to upgrade, however since Fedora 26 is the
same I am now
>>>>>> assuming that I have stuffed something up myself (or
missed
>>>>>> something).
>>>>>>
>>>>>> Fedora 21 uses kernel 3.19.3 and xen 4.4.1
>>>>>> Fedora 26 uses kernel 4.11.8 and xen 4.8.1
>>>>>>
>>>>>> I have tried following the info on 
>>>>>> https://wiki.xen.org/wiki/Fedora_Host_Installation but
it appears
>>>>>> to be out of date now (I used this site when I started
using Xen
>>>>>> under Fedora 19, and when I upgraded to Fedora 21)
>>>>>>
>>>>>> Does anyone have any suggestions? outputs from "xl
info" and the
>>>>>> domain config are below. I have also tried disabling
SELinux, but
>>>>>> it made no difference.
>>>>>>
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> GC
>>>>>>
>>>>>> -----------------------------------------------
>>>>>> On the fedora 26 box.....
>>>>>> # xl info
>>>>>> host                   : family.mydomain.mytld
>>>>>> release                : 4.11.8-300.fc26.x86_64
>>>>>> version                : #1 SMP Thu Jun 29 20:09:48 UTC
2017
>>>>>> machine                : x86_64
>>>>>> nr_cpus                : 4
>>>>>> max_cpu_id             : 3
>>>>>> nr_nodes               : 1
>>>>>> cores_per_socket       : 4
>>>>>> threads_per_core       : 1
>>>>>> cpu_mhz                : 2712
>>>>>> hw_caps                : 
>>>>>>
b7ebfbff:77faf3bf:2c100800:00000121:0000000f:009c67af:00000000:00000100
>>>>>>
>>>>>> virt_caps              : hvm hvm_directio
>>>>>> total_memory           : 8072
>>>>>> free_memory            : 128
>>>>>> sharing_freed_memory   : 0
>>>>>> sharing_used_memory    : 0
>>>>>> outstanding_claims     : 0
>>>>>> free_cpus              : 0
>>>>>> xen_major              : 4
>>>>>> xen_minor              : 8
>>>>>> xen_extra              : .1
>>>>>> xen_version            : 4.8.1
>>>>>> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p
>>>>>> hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
>>>>>> xen_scheduler          : credit
>>>>>> xen_pagesize           : 4096
>>>>>> platform_params        : virt_start=0xffff800000000000
>>>>>> xen_changeset          :
>>>>>> xen_commandline        : placeholder
>>>>>> cc_compiler            : gcc (GCC) 7.0.1 20170421 (Red
Hat
>>>>>> 7.0.1-0.15)
>>>>>> cc_compile_by          : mockbuild
>>>>>> cc_compile_domain      : [unknown]
>>>>>> cc_compile_date        : Wed May  3 21:23:49 UTC 2017
>>>>>> build_id               :
1c6e5a40165e05837303942b54757ae1f2d5033d
>>>>>> xend_config_format     : 4
>>>>>>
>>>>>> ---------------------------------------------------
>>>>>> # cat vmtest.xml
>>>>>> <domain type='xen' id='21'>
>>>>>>    <name>testVM</name>
>>>>>>    <memory
unit='KiB'>2097152</memory>
>>>>>>    <currentMemory
unit='KiB'>2097152</currentMemory>
>>>>>>    <vcpu
placement='static'>1</vcpu>
>>>>>>    <os>
>>>>>>      <type arch='x86_64'
machine='xenfv'>hvm</type>
>>>>>>      <loader
type='rom'>/usr/lib/xen/boot/hvmloader</loader>
>>>>>>      <boot dev='network'/>
>>>>>>    </os>
>>>>>>    <features>
>>>>>>      <acpi/>
>>>>>>      <apic/>
>>>>>>      <pae/>
>>>>>>    </features>
>>>>>>    <clock offset='variable'
adjustment='0' basis='utc'/>
>>>>>>    <on_poweroff>destroy</on_poweroff>
>>>>>>    <on_reboot>restart</on_reboot>
>>>>>>    <on_crash>restart</on_crash>
>>>>>>    <devices>
>>>>>>      <interface type='bridge'>
>>>>>>        <mac address='02:02:00:03:00:00'/>
>>>>>>        <source bridge='enp1s0'/>
>>>>>>        <script path='vif-bridge'/>
>>>>>>      </interface>
>>>>>>      <serial type='pty'>
>>>>>>        <target port='0'/>
>>>>>>      </serial>
>>>>>>      <console type='pty'>
>>>>>>        <target type='serial'
port='0'/>
>>>>>>      </console>
>>>>>>      <input type='mouse'
bus='ps2'/>
>>>>>>      <input type='keyboard'
bus='ps2'/>
>>>>>>      <graphics type='vnc'
port='5901' autoport='no'
>>>>>> listen='192.168.131.54'>
>>>>>>        <listen type='address'
address='192.168.131.54'/>
>>>>>>      </graphics>
>>>>>>    </devices>
>>>>>> </domain>
>>>>>>
>>>>>> --------------------------------------
>>>>>>
>>>>>> _______________________________________________
>>>>>> libvirt-users mailing list
>>>>>> libvirt-users@redhat.com
>>>>>> https://www.redhat.com/mailman/listinfo/libvirt-users
>>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> libvirt-users mailing list
>>>> libvirt-users@redhat.com
>>>> https://www.redhat.com/mailman/listinfo/libvirt-users
>>>
>>
>

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