[libvirt-users] Xen died - Fedora upgrade from 21 to 26
Alvin Starr
alvin at netvel.net
Wed Jul 26 14:28:25 UTC 2017
I believe this problem also exists in F25.
There are upsides to having a vm do the networking and I have used that
scheme for something like a decade.
The point is that libvirt should start up and start its VM's correctly.
If you cannot depend on the system starting correctly then very quickly
you cannot depend on the system at all and then your backing out to your
switches and network cables and power supplies .....
My guess is that its related to libvirt trying to start before the xen
subsystems have come up.
On 07/26/2017 09:32 AM, Dominik Psenner wrote:
> 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 at crowie.net
> <mailto:gclvirtlist at 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 at 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 <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
> <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>
>
> --------------------------------------
>
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--
Alvin Starr || land: (905)513-7688
Netvel Inc. || Cell: (416)806-0133
alvin at netvel.net ||
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