5:25 p.m.
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out of date now (I used this site when I started using Xen under Fedora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
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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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