[libvirt] [PATCH 3/3] virNetServerRun: Notify systemd that we're accepting clients

[Eric Blake]

On 02/21/2014 05:32 AM, Michal Privoznik wrote:
> Systemd does not forget about the cases, where client service needs to
> wait for daemon service to initialize and start accepting new clients.
> Setting a dependency in client is not enough as systemd doesn't know
> when the daemon has initialized itself and started accepting new
> clients. However, it offers a mechanism to solve this. The daemon needs
> to call a special systemd function by which the daemon tells "I'm ready
> to accept new clients". This is exactly what we need with
> libvirtd-guests (client) and libvirtd (daemon). So now, with this
> change, libvirt-guests.service is invoked not any sooner than
> libvirtd.service calls the systemd notify function.
> 
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
>  configure.ac               |  2 ++
>  daemon/libvirtd.service.in |  1 +
>  m4/virt-systemd-daemon.m4  | 34 ++++++++++++++++++++++++++++++++++
>  src/Makefile.am            |  4 ++--
>  src/libvirt_private.syms   |  1 +
>  src/rpc/virnetserver.c     |  7 +++++++
>  src/util/virsystemd.c      | 12 ++++++++++++
>  src/util/virsystemd.h      |  2 ++
>  8 files changed, 61 insertions(+), 2 deletions(-)
>  create mode 100644 m4/virt-systemd-daemon.m4

Adds a new configure option, but doesn't change the spec file.  This is
bad, because it means that someone doing 'make rpm' now has an
indeterminate behavior based on whether they have the library installed.
 We need a followup patch.


> +
> +AC_DEFUN([LIBVIRT_CHECK_SYSTEMD_DAEMON],[
> +  LIBVIRT_CHECK_PKG([SYSTEMD_DAEMON], [libsystemd-daemon], [0.27.1])

Ouch - this results in:

$ ./configure --help | grep daemon
  --with-systemd_daemon   with libsystemd-daemon (>= 0.27.1) support

which violates configure conventions of spelling all options with '-'
instead of '_'.  I'll prepare a followup for that.


-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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