[virt-tools-list] libvirt/virt-manager source integration with xen
Wayne Mills
wmills.on.gm at gmail.com
Tue Mar 3 19:31:27 UTC 2015
I downloaded and untarred the deb package and grepped for 'configure', but
none of the hits were configure commands. Is there a better way to find it?
Wayne
On Mon, Mar 2, 2015 at 3:08 PM, Cole Robinson <crobinso at redhat.com> wrote:
> On 03/02/2015 01:39 PM, Wayne Mills wrote:
> > Thanks Cole, unfortunately I'm a n00b in this area so your response just
> > raised many more questions for me :/
> >
> > * what are the config file names for libxl, libvirt and virt-manager
> > * where are they located in the respective source trees
> > * are the build flags defined in those config files?
> > * libxl is part of xen 4.5.0 distro (xen/tools/libxl after untarring).
> But no
> > config file is in xen/tools/libxl directory
> > * I do see CFLAGS definitions in the various makefiles within each
> directory.
> > Are those the build flags you are referring to? here's an example from
> > libxl/Makefile:
> >
> > CFLAGS += -Werror -Wno-format-zero-length -Wmissing-declarations \
> > -Wno-declaration-after-statement -Wformat-nonliteral
> > CFLAGS += -I. -fPIC
> >
> > * by distro I assume you mean binary package, and that I can install
> > virt-manager binary package on top of libxl/libvirt/xen that I built and
> > installed locally from source. if I have compiled libxl/libvirt/xen with
> > virt-manager compile flags. Does that summarize what you are
> recommending?
> > If so then how do I know virt-manager flags? That was a binary. Do I
> have to
> > download virt-manager source to find those?
> >
>
> I meant the files that are used to generate your distro's binary packages.
> The
> bits that determine how software is compiled before wrapping it up in a
> distribution package.
>
> For example, I googled 'libvirt ubuntu package' and got to this:
>
> https://launchpad.net/ubuntu/+source/libvirt
>
> I clicked the top link for 1.2.12-0ubuntu7:
>
> https://launchpad.net/ubuntu/+source/libvirt/1.2.12-0ubuntu7
>
> On this page is a link to the .deb packaging files:
>
>
> https://launchpad.net/ubuntu/+archive/primary/+files/libvirt_1.2.12-0ubuntu7.debian.tar.xz
>
> Somewhere in there ./configure command line that generates the build for
> ubuntu's libvirt package. You'll want to pull that out for libvirt and for
> whatever provides libxl on ubuntu.
>
> At least that's the process I follow on Fedora when I want to compile some
> random software package from source.
>
> > * libxl was part of xen source tarball, and therefore has a source tree
> > position within xen (xen/tools/libxl as mentioned before). Should I
> place
> > libvirt and virt-manager in some specific source tree spot relative to
> xen?
> > Should libvirt and virt-manager be aware of libxl source location? Is
> there
> > any makefile engineering involved?
> >
>
> If you copy the distribution ./configure lines, you shouldn't have to deal
> with specifying any explicit paths.
>
> > Trying to work with your answer but I have a serious background deficit
> to
> > deal with. For this reason I love technical 'cookbooks' that provide all
> > missing details :)
> >
>
> I don't know of any explicit instructions for what you want, since these
> types
> of things vary a lot distro to distro and between software. Building
> multiple
> dependent packages from source is often a non-trivial task. And if you are
> 'make install'ing various different build configurations and things don't
> 'just work', it can be very difficult to debug things if they go wrong.
>
> - Cole
>
>
> > On Mon, Mar 2, 2015 at 12:12 PM, Cole Robinson <crobinso at redhat.com
> > <mailto:crobinso at redhat.com>> wrote:
> >
> > On 03/02/2015 10:55 AM, Wayne Mills wrote:
> > > Hi,
> > >
> > > I built and installed Xen 4.5.0 from source, on top of Ubuntu
> 14.04.2, using
> > > "make world" and "make install" targets. I then installed latest
> > virt-manager
> > > from pre-built packages. After bringing up virt-manager I attempt
> to
> > connect
> > > to Xen hypervisor and got:
> > >
> > > unable to connect to libvirt
> > > Failed to connect socket to /var/run/libvirt/libvirt-sock' No
> such file
> > > or directory
> > >
> > > I then noticed libvirt-bin isn't running. If I try to issue
> 'service
> > > libvirt-bin start' it gives me back a process number, but it
> apparently dies
> > > quickly because the service still shows as down. Three log files
> are
> > touched
> > > during my start attempt:
> > >
> > > -rw-r--r-- 1 root root 39757 Feb 27 06:00
> > /var/log/xenstored-access.log
> > > -rw-r--r-- 1 root root 44908 Feb 27 06:00
> > > /var/log/libvirt/libxl/libxl-driver.log
> > > -rw------- 1 root root 46396 Feb 27 06:00
> > /var/log/libvirt/libvirtd.log
> > >
> > > * xenstored-access.log has 22 new entries, grouped into pairs that
> increment
> > > an "Axx" identifier and go from A63 to A73. Here is the A63 logs:
> > >
> > > [20150227T11:00:29.478Z] A63 newconn
> > > [20150227T11:00:29.479Z] A63 endconn
> > >
> > > * libxl-driver.log also has 11 log groupings that are just the
> same set of
> > > logs repeated 11 times. Here is the first group:
> > >
> > > xc: detail: sysctl operation failed -- need to rebuild the
> user-space
> > > tool set?
> > > libxl: error: libxl.c:4320:libxl_get_physinfo: getting
> physinfo:
> > > Permission denied
> > > xc: debug: hypercall buffer: total allocations:7 total
> releases:7
> > > xc: debug: hypercall buffer: current allocations:0 maximum
> > allocations:1
> > > xc: debug: hypercall buffer: cache current size:1
> > > xc: debug: hypercall buffer: cache hits:6 misses:1 toobig:0
> > >
> > > * libvirtd.log also has 11 log groupings, that are just the same
> set of logs
> > > repeated 11 times. Here is that group:
> > >
> > > 2015-02-27 11:00:29.479+0000: 4842: info : libvirt version:
> 1.2.2
> > > 2015-02-27 11:00:29.479+0000: 4842: error :
> libxlDriverConfigNew:1131 :
> > > Unable to configure libxl's memory management parameters
> > > 2015-02-27 11:00:29.479+0000: 4842: error :
> virStateInitialize:749 :
> > > Initialization of LIBXL state driver failed: Unknown problem
> > > 2015-02-27 11:00:29.479+0000: 4842: error :
> daemonRunStateInit:920 :
> > > Driver state initialization failed
> > >
> > > When I google for libxl_get_physinfo I see other reported errors
> during "xl
> > > info" and other "xl" commands. I tried "xl info" and that works
> for
> > me and
> > > does not alter the log files:
> > >
> > > root@<server>:~# xl info
> > > host : server
> > > release : 3.13.0-46-generic
> > > version : #75-Ubuntu SMP Tue Feb 10 15:24:04 UTC
> 2015
> > > machine : x86_64
> > > nr_cpus : 8
> > > max_cpu_id : 7
> > > nr_nodes : 2
> > > cores_per_socket : 4
> > > threads_per_core : 1
> > > cpu_mhz : 2400
> > > hw_caps :
> > >
> bfebfbff:2c100800:00000000:00003f00:17bee3ff:00000000:00000001:00000000
> > > virt_caps : hvm hvm_directio
> > > total_memory : 98168
> > > free_memory : 128
> > > sharing_freed_memory : 0
> > > sharing_used_memory : 0
> > > outstanding_claims : 0
> > > free_cpus : 0
> > > xen_major : 4
> > > xen_minor : 5
> > > xen_extra : .0
> > > xen_version : 4.5.0
> > > 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 : Mon Jan 12 11:30:05 2015 -0500 git:a8ac229
> > > xen_commandline : placeholder
> > > cc_compiler : gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2
> > > cc_compile_by : root
> > > cc_compile_domain : cisco.com <http://cisco.com> <
> http://cisco.com>
> > > cc_compile_date : Thu Feb 19 07:26:00 EST 2015
> > > xend_config_format : 4
> > > root@<server>:~#
> > >
> > > After consulting with xen-users mailer, I was given this response
> by "Ian":
> > >
> > > "Did you install libvirt from source or from packages? If the
> latter then you
> > > may have a disconnect between the packaged version and your
> source-built Xen.
> > > You'll probably need to rebuild libvirt against your Xen
> libraries."
> > >
> > > What are the virt-related steps to take to test out Ian's idea? I
> have root
> > > access to one machine that serves both as a host to VM's as well
> as a build
> > > environment for source builds such as this. I already built xen
> 4.5.0 and
> > > installed it. Do I now need to separately download and build
> libvirt, then
> > > download and build virt-manager? Is it important to place the
> virt* code
> > > within the xen source tree, or do something else so that the virt*
> code
> > > compiles "against" an appropriate xen environment?
> > >
> > > In summary, I would like some guidance on how to build libvirt,
> and if needed,
> > > virt-manager, source against a specific Xen version.
> > >
> >
> > Distro packages of virt-manager should work fine, once you get
> libvirt
> > building.
> >
> > I recommend you download the ubuntu .deb config files for libxl, and
> > rebuild+install libxl with the exact same build flags your distro
> packages
> > use. They've already figured out the necessary flags to make things
> work
> > together with the other distro packages. Then do the same with
> libvirt.
> >
> > - Cole
> >
> >
>
>
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