Add support for systemd init service

This patch adds support for a systemd init service for libvirtd
and libvirt-guests. The libvirtd.service is *not* written to use
socket activation, since we want libvirtd to start on boot so it
can do guest auto-start.

The libvirt-guests.service is pretty lame, just exec'ing the
original init script for now. Ideally we would factor out the
functionality, into some shared tool.

Instead of

  ./configure --with-init-script=redhat

You can now do

  ./configure --with-init-script=systemd

Or better still:

  ./configure --with-init-script=systemd+redhat

We can also now support install of the upstart init script

* configure.ac: Add systemd, and systemd+redhat options to
  --with-init-script option
* daemon/Makefile.am: Install systemd services
* daemon/libvirtd.sysconf: Add note about unused env variable
  with systemd
* daemon/libvirtd.service.in: libvirtd systemd service unit
* libvirt.spec.in: Add scripts to installing systemd services
  and migrating from legacy init scripts
* tools/Makefile.am: Install systemd services
* tools/libvirt-guests.init.sh: Rename to tools/libvirt-guests.init.in
* tools/libvirt-guests.service.in: systemd service unit

configure.ac

@@ -329,16 +329,41 @@ dnl init script flavor
 dnl
 AC_MSG_CHECKING([for init script flavor])
 AC_ARG_WITH([init-script],
-            [AC_HELP_STRING([--with-init-script=@<:@redhat|auto|none@:>@],
-		     [Style of init script to install @<:@default=auto@:>@])])
-if test "x$with_init_script" = "x" || test "x$with_init_script" = "xauto"; then
-    if test "$cross_compiling" = yes || test ! -f /etc/redhat-release; then
-        with_init_script=none
-    else
-        with_init_script=redhat
-    fi
-fi
-AM_CONDITIONAL([LIBVIRT_INIT_SCRIPT_RED_HAT], test x$with_init_script = xredhat)
+            [AC_HELP_STRING([--with-init-script@<:@=STYLE@:>@],
+                            [Style of init script to install: redhat, systemd, systemd+redhat,
+                             upstart, auto, none @<:@default=auto@:>@])],[],[with_init_script=check])
+init_redhat=no
+init_systemd=no
+init_upstart=no
+case "$with_init_script" in
+    systemd+redhat)
+       init_redhat=yes
+       init_systemd=yes
+       ;;
+    systemd)
+       init_systemd=yes
+       ;;
+    upstart)
+       init_upstart=yes
+       ;;
+    redhat)
+       init_redhat=yes
+       ;;
+    none)
+       ;;
+    check)
+       if test "$cross_compiling" != yes && test -f /etc/redhat-release; then
+          init_redhat=yes
+          with_init_script=redhat
+       fi
+       ;;
+    *)
+       AC_MSG_ERROR([Unknown initscript flavour $with_init_script])
+    ;;
+esac
+AM_CONDITIONAL([LIBVIRT_INIT_SCRIPT_RED_HAT], test "$init_redhat" = "yes")
+AM_CONDITIONAL([LIBVIRT_INIT_SCRIPT_UPSTART], test "$init_upstart" = "yes")
+AM_CONDITIONAL([LIBVIRT_INIT_SCRIPT_SYSTEMD], test "$init_systemd" = "yes")
 AC_MSG_RESULT($with_init_script)
 
 dnl RHEL-5 has a peculiar version of Xen, which requires some special casing
@@ -2680,6 +2705,7 @@ AC_MSG_NOTICE([     Readline: $lv_use_readline])
 AC_MSG_NOTICE([       Python: $with_python])
 AC_MSG_NOTICE([       DTrace: $with_dtrace])
 AC_MSG_NOTICE([  XML Catalog: $XML_CATALOG_FILE])
+AC_MSG_NOTICE([  Init script: $with_init_script])
 AC_MSG_NOTICE([])
 AC_MSG_NOTICE([Privileges])
 AC_MSG_NOTICE([])

daemon/.gitignore

@@ -7,6 +7,7 @@ Makefile.in
 libvirt_qemud
 libvirtd
 libvirtd.init
+libvirtd.service
 libvirtd*.logrotate
 libvirtd.8
 libvirtd.8.in

daemon/Makefile.am

@@ -170,22 +170,25 @@ policyfile = libvirtd.policy-1
 endif
 endif
 
-install-data-local: install-init install-data-sasl install-data-polkit \
-		    install-logrotate
+install-data-local: install-init-redhat install-init-systemd install-init-upstart \
+		install-data-sasl install-data-polkit \
+		install-logrotate install-sysctl
 	mkdir -p $(DESTDIR)$(localstatedir)/log/libvirt
 	mkdir -p $(DESTDIR)$(localstatedir)/run/libvirt
 	mkdir -p $(DESTDIR)$(localstatedir)/lib/libvirt
 
-uninstall-local:: uninstall-init uninstall-data-sasl uninstall-data-polkit
+uninstall-local:: uninstall-init-redhat uninstall-init-systemd uninstall-init-upstart \
+		uninstall-data-sasl uninstall-data-polkit \
+		uninstall-sysctl
 	rmdir $(DESTDIR)$(localstatedir)/log/libvirt || :
 	rmdir $(DESTDIR)$(localstatedir)/run/libvirt || :
 	rmdir $(DESTDIR)$(localstatedir)/lib/libvirt || :
 
 if HAVE_POLKIT
-install-data-polkit:: install-init
+install-data-polkit::
 	mkdir -p $(DESTDIR)$(policydir)
 	$(INSTALL_DATA) $(srcdir)/$(policyfile) $(DESTDIR)$(policydir)/org.libvirt.unix.policy
-uninstall-data-polkit:: install-init
+uninstall-data-polkit::
 	rm -f $(DESTDIR)$(policydir)/org.libvirt.unix.policy
 else
 install-data-polkit::
@@ -234,25 +237,71 @@ install-logrotate: $(LOGROTATE_CONFS)
 	$(INSTALL_DATA) libvirtd.lxc.logrotate $(DESTDIR)$(sysconfdir)/logrotate.d/libvirtd.lxc
 	$(INSTALL_DATA) libvirtd.uml.logrotate $(DESTDIR)$(sysconfdir)/logrotate.d/libvirtd.uml
 
-if LIBVIRT_INIT_SCRIPT_RED_HAT
-install-init: libvirtd.init
-	mkdir -p $(DESTDIR)$(sysconfdir)/rc.d/init.d \
-	  $(DESTDIR)$(sysconfdir)/sysconfig \
-	  $(DESTDIR)$(sysconfdir)/sysctl.d
-	$(INSTALL_SCRIPT) libvirtd.init \
-	  $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirtd
+install-sysconfig:
+	mkdir -p $(DESTDIR)$(sysconfdir)/sysconfig
 	$(INSTALL_DATA) $(srcdir)/libvirtd.sysconf \
 	  $(DESTDIR)$(sysconfdir)/sysconfig/libvirtd
+uninstall-sysconfig:
+	rm -f $(DESTDIR)$(sysconfdir)/sysconfig/libvirtd
+
+install-sysctl:
+	mkdir -p $(DESTDIR)$(sysconfdir)/sysctl.d
 	$(INSTALL_DATA) $(srcdir)/libvirtd.sysctl \
 	  $(DESTDIR)$(sysconfdir)/sysctl.d/libvirtd
 
-uninstall-init:
-	rm -f $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirtd \
-		$(DESTDIR)$(sysconfdir)/sysconfig/libvirtd \
-		$(DESTDIR)$(sysconfdir)/sysctl.d/libvirtd
+uninstall-sysctl:
+	rm -f $(DESTDIR)$(sysconfdir)/sysctl.d/libvirtd
+
+if LIBVIRT_INIT_SCRIPT_RED_HAT
 
 BUILT_SOURCES += libvirtd.init
 
+install-init-redhat: install-sysconfig libvirtd.init
+	mkdir -p $(DESTDIR)$(sysconfdir)/rc.d/init.d
+	$(INSTALL_SCRIPT) libvirtd.init \
+	  $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirtd
+
+uninstall-init-redhat: uninstall-sysconfig
+	rm -f $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirtd
+else
+install-init-redhat:
+uninstall-init-redhat:
+endif # LIBVIRT_INIT_SCRIPT_RED_HAT
+
+
+if LIBVIRT_INIT_SCRIPT_UPSTART
+
+install-init-upstart: install-sysconfig
+	mkdir -p $(DESTDIR)$(sysconfdir)/event.d
+	$(INSTALL_SCRIPT) libvirtd.upstart \
+	  $(DESTDIR)$(sysconfdir)/event.d/libvirtd
+
+uninstall-init-upstart: uninstall-sysconfig
+	rm -f $(DESTDIR)$(sysconfdir)/event.d/libvirtd
+else
+install-init-upstart:
+uninstall-init-upstart:
+endif # LIBVIRT_INIT_SCRIPT_UPSTART
+
+
+EXTRA_DIST += libvirtd.service.in
+if LIBVIRT_INIT_SCRIPT_SYSTEMD
+
+SYSTEMD_UNIT_DIR = /lib/systemd/system
+BUILT_SOURCES += libvirtd.service
+
+install-init-systemd: install-sysconfig libvirtd.service
+	mkdir -p $(DESTDIR)$(SYSTEMD_UNIT_DIR)
+	$(INSTALL_SCRIPT) libvirtd.service \
+	  $(DESTDIR)$(SYSTEMD_UNIT_DIR)/libvirtd.service
+
+uninstall-init-systemd: uninstall-sysconfig
+	rm -f $(DESTDIR)$(SYSTEMD_UNIT_DIR)/libvirtd.service
+else
+install-init-systemd:
+uninstall-init-systemd:
+endif # LIBVIRT_INIT_SCRIPT_SYSTEMD
+
 libvirtd.init: libvirtd.init.in $(top_builddir)/config.status
 	$(AM_V_GEN)sed					\
 	    -e s!\@localstatedir\@!@localstatedir@!g	\
@@ -262,18 +311,21 @@ libvirtd.init: libvirtd.init.in $(top_builddir)/config.status
 	    chmod a+x $@-t &&				\
 	    mv $@-t $@
 
+libvirtd.service: libvirtd.service.in $(top_builddir)/config.status
+	$(AM_V_GEN)sed					\
+	    -e s!\@localstatedir\@!@localstatedir@!g	\
+	    -e s!\@sbindir\@!@sbindir@!g		\
+	    -e s!\@sysconfdir\@!@sysconfdir@!g		\
+	    < $< > $@-t &&				\
+	    chmod a+x $@-t &&				\
+	    mv $@-t $@
+
+
 check-local:
 	$(AM_V_GEN)if test -x '$(AUGPARSE)'; then \
 	  '$(AUGPARSE)' -I $(srcdir) $(srcdir)/test_libvirtd.aug; \
 	fi
 
-else
-
-install-init:
-uninstall-init:
-libvirtd.init:
-
-endif # LIBVIRT_INIT_SCRIPT_RED_HAT
 
 # This must be added last, since functions it provides/replaces
 # are used by nearly every other library.

daemon/libvirtd.service.in

+# NB we don't use socket activation. When libvirtd starts it will
+# spawn any virtual machines registered for autostart. We want this
+# to occur on every boot, regardless of whether any client connects
+# to a socket. Thus socket activation doesn't have any benefit
+
+[Unit]
+Description=Virtualization daemon
+After=syslog.target
+After=udev.target
+After=avahi.target
+After=dbus.target
+Before=libvirt-guests.service
+
+[Service]
+EnvironmentFile=-/etc/sysconfig/libvirtd
+ExecStart=@sbindir@/libvirtd $LIBVIRTD_ARGS
+ExecReload=/bin/kill -HUP $MAINPID
+
+[Install]
+WantedBy=multi-user.target

daemon/libvirtd.sysconf

 # Override the default config file
+# NOTE: This setting is no longer honoured if using
+# systemd. Set '--config /etc/libvirt/libvirtd.conf'
+# in LIBVIRTD_ARGS instead.
 #LIBVIRTD_CONFIG=/etc/libvirt/libvirtd.conf
 
 # Listen for TCP/IP connections

libvirt.spec.in

@@ -78,6 +78,7 @@
 %define with_dtrace        0%{!?_without_dtrace:0}
 %define with_cgconfig      0%{!?_without_cgconfig:0}
 %define with_sanlock       0%{!?_without_sanlock:0}
+%define with_systemd       0%{!?_without_systemd:0}
 
 # Non-server/HV driver defaults which are always enabled
 %define with_python        0%{!?_without_python:1}
@@ -111,6 +112,11 @@
 %define with_hyperv 0
 %endif
 
+# Although earlier Fedora has systemd, libvirt still used sysvinit
+%if 0%{?fedora} >= 17
+%define with_systemd 1
+%endif
+
 # RHEL-5 has restricted QEMU to x86_64 only and is too old for LXC
 %if 0%{?rhel} == 5
 %ifnarch x86_64
@@ -329,7 +335,9 @@ Requires: libcgroup
 
 # All build-time requirements
 BuildRequires: python-devel
-
+%if %{with_systemd}
+BuildRequires: systemd-units
+%endif
 %if %{with_xen}
 BuildRequires: xen-devel
 %endif
@@ -474,6 +482,13 @@ BuildRequires: nfs-utils
 # Fedora build root suckage
 BuildRequires: gawk
 
+%if %{with_systemd}
+Requires(post): systemd-units
+Requires(post): systemd-sysv
+Requires(preun): systemd-units
+Requires(postun): systemd-units
+%endif
+
 %description
 Libvirt is a C toolkit to interact with the virtualization capabilities
 of recent versions of Linux (and other OSes). The main package includes
@@ -696,6 +711,13 @@ of recent versions of Linux (and other OSes).
 %define with_packager --with-packager="%{who}, %{when}, %{where}"
 %define with_packager_version --with-packager-version="%{release}"
 
+%if %{with_systemd}
+# We use 'systemd+redhat', so if someone installs upstart or
+# legacy init scripts, they can still start libvirtd, etc
+%define init_scripts --with-init_script=systemd+redhat
+%else
+%define init_scripts --with-init_script=redhat
+%endif
 
 %configure %{?_without_xen} \
            %{?_without_qemu} \
@@ -736,7 +758,7 @@ of recent versions of Linux (and other OSes).
            %{with_packager_version} \
            --with-qemu-user=%{qemu_user} \
            --with-qemu-group=%{qemu_group} \
-           --with-init-script=redhat \
+           %{init_scripts} \
            --with-remote-pid-file=%{_localstatedir}/run/libvirtd.pid
 make %{?_smp_mflags}
 gzip -9 ChangeLog
@@ -744,7 +766,7 @@ gzip -9 ChangeLog
 %install
 rm -fr %{buildroot}
 
-%makeinstall
+%makeinstall SYSTEMD_UNIT_DIR=%{_unitdir}
 for i in domain-events/events-c dominfo domsuspend hellolibvirt openauth python xml/nwfilter systemtap
 do
   (cd examples/$i ; make clean ; rm -rf .deps .libs Makefile Makefile.in)
@@ -893,6 +915,13 @@ do
 done
 %endif
 
+%if %{with_systemd}
+if [ $1 -eq 1 ] ; then
+    # Initial installation
+    /bin/systemctl enable libvirtd.service >/dev/null 2>&1 || :
+    /bin/systemctl enable cgconfig.service >/dev/null 2>&1 || :
+fi
+%else
 %if %{with_cgconfig}
 # Starting with Fedora 16, systemd automounts all cgroups, and cgconfig is
 # no longer a necessary service.
@@ -908,25 +937,64 @@ if [ "$1" -ge "1" ]; then
 	/sbin/service libvirtd condrestart > /dev/null 2>&1
 fi
 %endif
+%endif
 
 %preun
 %if %{with_libvirtd}
+%if %{with_systemd}
+if [ $1 -eq 0 ] ; then
+    # Package removal, not upgrade
+    /bin/systemctl --no-reload disable libvirtd.service > /dev/null 2>&1 || :
+    /bin/systemctl stop libvirtd.service > /dev/null 2>&1 || :
+fi
+%else
 if [ $1 = 0 ]; then
     /sbin/service libvirtd stop 1>/dev/null 2>&1
     /sbin/chkconfig --del libvirtd
 fi
 %endif
+%endif
+
+%postun
+%if %{with_libvirtd}
+%if %{with_systemd}
+/bin/systemctl daemon-reload >/dev/null 2>&1 || :
+if [ $1 -ge 1 ] ; then
+    # Package upgrade, not uninstall
+    /bin/systemctl try-restart libvirtd.service >/dev/null 2>&1 || :
+fi
+%endif
+%endif
+
+%if %{with_libvirtd}
+%if %{with_systemd}
+%triggerun -- libvirt < 0.9.4
+%{_bindir}/systemd-sysv-convert --save libvirtd >/dev/null 2>&1 ||:
+
+# If the package is allowed to autostart:
+/bin/systemctl --no-reload enable libvirtd.service >/dev/null 2>&1 ||:
+
+# Run these because the SysV package being removed won't do them
+/sbin/chkconfig --del libvirtd >/dev/null 2>&1 || :
+/bin/systemctl try-restart libvirtd.service >/dev/null 2>&1 || :
+%endif
+%endif
 
 %preun client
 
+%if %{with_systemd}
+%else
 if [ $1 = 0 ]; then
     /sbin/chkconfig --del libvirt-guests
     rm -f /var/lib/libvirt/libvirt-guests
 fi
+%endif
 
 %post client
 
 /sbin/ldconfig
+%if %{with_systemd}
+%else
 /sbin/chkconfig --add libvirt-guests
 if [ $1 -ge 1 ]; then
     level=$(/sbin/runlevel | /bin/cut -d ' ' -f 2)
@@ -937,9 +1005,22 @@ if [ $1 -ge 1 ]; then
         /sbin/service libvirt-guests start > /dev/null 2>&1 || true
     fi
 fi
+%endif
 
 %postun client -p /sbin/ldconfig
 
+%if %{with_systemd}
+%triggerun client -- libvirt < 0.9.4
+%{_bindir}/systemd-sysv-convert --save libvirt-guests >/dev/null 2>&1 ||:
+
+# If the package is allowed to autostart:
+/bin/systemctl --no-reload enable libvirt-guests.service >/dev/null 2>&1 ||:
+
+# Run these because the SysV package being removed won't do them
+/sbin/chkconfig --del libvirt-guests >/dev/null 2>&1 || :
+/bin/systemctl try-restart libvirt-guests.service >/dev/null 2>&1 || :
+%endif
+
 %if %{with_libvirtd}
 %files
 %defattr(-, root, root)
@@ -957,6 +1038,9 @@ fi
 %{_sysconfdir}/libvirt/nwfilter/*.xml
 
 %{_sysconfdir}/rc.d/init.d/libvirtd
+%if %{with_systemd}
+%{_unitdir}/libvirtd.service
+%endif
 %doc daemon/libvirtd.upstart
 %config(noreplace) %{_sysconfdir}/sysconfig/libvirtd
 %config(noreplace) %{_sysconfdir}/libvirt/libvirtd.conf
@@ -1113,6 +1197,9 @@ rm -f $RPM_BUILD_ROOT%{_sysconfdir}/sysctl.d/libvirtd
 %{_datadir}/libvirt/cpu_map.xml
 
 %{_sysconfdir}/rc.d/init.d/libvirt-guests
+%if %{with_systemd}
+%{_unitdir}/libvirt-guests.service
+%endif
 %config(noreplace) %{_sysconfdir}/sysconfig/libvirt-guests
 %dir %attr(0755, root, root) %{_localstatedir}/lib/libvirt/
 

po/POTFILES.in

@@ -152,5 +152,5 @@ src/xenapi/xenapi_utils.c
 src/xenxs/xen_sxpr.c
 src/xenxs/xen_xm.c
 tools/console.c
-tools/libvirt-guests.init.sh
+tools/libvirt-guests.init.in
 tools/virsh.c

tools/Makefile.am

@@ -25,7 +25,6 @@ EXTRA_DIST = \
 	virt-sanlock-cleanup.in				\
 	virt-sanlock-cleanup.8				\
 	virsh.pod					\
-	libvirt-guests.init.sh				\
 	libvirt-guests.sysconf
 
 DISTCLEANFILES =
@@ -153,21 +152,32 @@ install-data-local: install-init
 
 uninstall-local: uninstall-init
 
+install-sysconfig:
+	mkdir -p $(DESTDIR)$(sysconfdir)/sysconfig
+	$(INSTALL_DATA) $(srcdir)/libvirt-guests.sysconf \
+	  $(DESTDIR)$(sysconfdir)/sysconfig/libvirt-guests
+
+uninstall-sysconfig:
+	rm -f $(DESTDIR)$(sysconfdir)/sysconfig/libvirt-guests
+
+EXTRA_DIST += libvirt-guests.init.sh
+
 if LIBVIRT_INIT_SCRIPT_RED_HAT
-install-init: libvirt-guests.init
+install-init: libvirt-guests.init install-sysconfig
 	mkdir -p $(DESTDIR)$(sysconfdir)/rc.d/init.d
 	$(INSTALL_SCRIPT) libvirt-guests.init \
 	  $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirt-guests
-	mkdir -p $(DESTDIR)$(sysconfdir)/sysconfig
-	$(INSTALL_DATA) $(srcdir)/libvirt-guests.sysconf \
-	  $(DESTDIR)$(sysconfdir)/sysconfig/libvirt-guests
 
-uninstall-init:
-	rm -f $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirt-guests \
-	  $(DESTDIR)$(sysconfdir)/sysconfig/libvirt-guests
+uninstall-init: install-sysconfig
+	rm -f $(DESTDIR)$(sysconfdir)/rc.d/init.d/libvirt-guests
 
 BUILT_SOURCES += libvirt-guests.init
 
+else
+install-init:
+uninstall-init:
+endif # LIBVIRT_INIT_SCRIPT_RED_HAT
+
 libvirt-guests.init: libvirt-guests.init.sh $(top_builddir)/config.status
 	$(AM_V_GEN)sed					\
 	    -e 's!\@PACKAGE\@!$(PACKAGE)!g'		\
@@ -179,11 +189,38 @@ libvirt-guests.init: libvirt-guests.init.sh $(top_builddir)/config.status
 	    < $< > $@-t &&				\
 	    chmod a+x $@-t &&				\
 	    mv $@-t $@
+
+
+
+EXTRA_DIST += libvirt-guests.service.in
+
+if LIBVIRT_INIT_SCRIPT_SYSTEMD
+install-systemd: libvirt-guests.service install-sysconfig
+	mkdir -p $(DESTDIR)$(sysconfdir)/rc.d/systemd.d
+	$(INSTALL_SCRIPT) libvirt-guests.service \
+	  $(DESTDIR)$(sysconfdir)/rc.d/systemd.d/libvirt-guests
+
+uninstall-systemd: install-sysconfig
+	rm -f $(DESTDIR)$(sysconfdir)/rc.d/systemd.d/libvirt-guests
+
+BUILT_SOURCES += libvirt-guests.service
+
 else
-install-init:
-uninstall-init:
-libvirt-guests.init:
-endif # LIBVIRT_INIT_SCRIPT_RED_HAT
+install-systemd:
+uninstall-systemd:
+endif # LIBVIRT_INIT_SCRIPT_SYSTEMD
+
+libvirt-guests.service: libvirt-guests.service.in $(top_builddir)/config.status
+	$(AM_V_GEN)sed					\
+	    -e 's!\@PACKAGE\@!$(PACKAGE)!g'		\
+	    -e 's!\@bindir\@!$(bindir)!g'		\
+	    -e 's!\@localedir\@!$(localedir)!g'		\
+	    -e 's!\@localstatedir\@!$(localstatedir)!g'	\
+	    -e 's!\@sbindir\@!$(sbindir)!g'		\
+	    -e 's!\@sysconfdir\@!$(sysconfdir)!g'	\
+	    < $< > $@-t &&				\
+	    chmod a+x $@-t &&				\
+	    mv $@-t $@
 
 
 CLEANFILES = $(bin_SCRIPTS)

tools/libvirt-guests.service.in

+[Unit]
+Description=Suspend Active Libvirt Guests
+After=syslog.target network.target
+
+[Service]
+EnvironmentFile=-/etc/sysconfig/libvirt-guests
+# Hack just call traditional service until we factor
+# out the code
+ExecStart=/etc/init.d/libvirt-guests start
+ExecStop=/etc/init.d/libvirt-guests stop
+
+[Install]
+WantedBy=multi-user.target