Add systemd unit files

We add templates for systemd service files and systemd targets under
doc/examples/systemd and flag them to be built. The generated files are
also added to .gitignore.
Signed-off-by: Apollon Oikonomopoulos <apoikos@gmail.com>
Reviewed-by: Jose A. Lopes <jabolopes@google.com>

.gitignore

@@ -83,6 +83,7 @@
 /doc/examples/ganeti-node-role.ocf
 /doc/examples/gnt-config-backup
 /doc/examples/hooks/ipsec
+/doc/examples/systemd/ganeti-*.service
 
 # lib
 /lib/_constants.py

Makefile.am

@@ -173,6 +173,7 @@ DIRS = \
 	doc/examples \
 	doc/examples/gnt-debug \
 	doc/examples/hooks \
+	doc/examples/systemd \
 	doc/users \
 	test/data/htools \
 	test/data/htools/rapi \
@@ -342,7 +343,17 @@ BUILT_EXAMPLES = \
 	doc/examples/ganeti-master-role.ocf \
 	doc/examples/ganeti-node-role.ocf \
 	doc/examples/gnt-config-backup \
-	doc/examples/hooks/ipsec
+	doc/examples/hooks/ipsec \
+	doc/examples/systemd/ganeti-common.service \
+	doc/examples/systemd/ganeti-confd.service \
+	doc/examples/systemd/ganeti-kvmd.service \
+	doc/examples/systemd/ganeti-luxid.service \
+	doc/examples/systemd/ganeti-masterd.service \
+	doc/examples/systemd/ganeti-metad.service \
+	doc/examples/systemd/ganeti-mond.service \
+	doc/examples/systemd/ganeti-noded.service \
+	doc/examples/systemd/ganeti-rapi.service \
+	doc/examples/systemd/ganeti-wconfd.service
 
 dist_ifup_SCRIPTS = \
 	tools/kvm-ifup-os \

doc/examples/systemd/ganeti-common.service.in

+[Unit]
+Description = Ganeti one-off setup
+
+[Service]
+Type = oneshot
+ExecStart = @PKGLIBDIR@/ensure-dirs

doc/examples/systemd/ganeti-confd.service.in

+[Unit]
+Description = Ganeti configuration daemon (confd)
+Documentation = man:ganeti-confd(8)
+Requires = ganeti-common.service
+After = ganeti-common.service
+PartOf = ganeti-node.target
+ConditionPathExists = @LOCALSTATEDIR@/lib/ganeti/config.data
+
+[Service]
+Type = simple
+User = @GNTCONFDUSER@
+Group = @GNTCONFDGROUP@
+ExecStart = @SBINDIR@/ganeti-confd -f
+Restart = on-failure
+
+[Install]
+WantedBy = ganeti-node.target ganeti.target

doc/examples/systemd/ganeti-kvmd.service.in

+[Unit]
+Description = Ganeti KVM daemon (kvmd)
+Documentation = man:ganeti-kvmd(8)
+Requires = ganeti-common.service
+After = ganeti-common.service
+PartOf = ganeti-noded.target
+
+[Service]
+Type = simple
+Group = @GNTDAEMONSGROUP@
+ExecStart = @SBINDIR@/ganeti-kvmd -f
+Restart = on-failure
+
+# ganeti-kvmd is started on-demand by noded, so there must be no Install
+# section.

doc/examples/systemd/ganeti-luxid.service.in

+[Unit]
+Description = Ganeti query daemon (luxid)
+Documentation = man:ganeti-luxid(8)
+Requires = ganeti-common.service
+After = ganeti-common.service
+PartOf = ganeti-master.target
+ConditionPathExists = @LOCALSTATEDIR@/lib/ganeti/config.data
+
+[Service]
+Type = simple
+User = @GNTLUXIDUSER@
+Group = @GNTLUXIDGROUP@
+ExecStart = @SBINDIR@/ganeti-luxid -f
+Restart = on-failure
+SuccessExitStatus = 0 11
+
+[Install]
+WantedBy = ganeti-master.target ganeti.target

doc/examples/systemd/ganeti-master.target

+[Unit]
+Description = Ganeti master functionality
+Documentation = man:ganeti(7)
+After = syslog.target
+PartOf = ganeti.target
+
+[Install]
+WantedBy = ganeti.target

doc/examples/systemd/ganeti-masterd.service.in

+[Unit]
+Description = Ganeti master daemon (masterd)
+Documentation = man:ganeti-masterd(8)
+Requires = ganeti-common.service
+After = ganeti-common.service
+PartOf = ganeti-master.target
+ConditionPathExists = @LOCALSTATEDIR@/lib/ganeti/config.data
+
+[Service]
+Type = simple
+User = @GNTMASTERUSER@
+Group = @GNTMASTERDGROUP@
+ExecStart = @SBINDIR@/ganeti-masterd -f
+Restart = on-failure
+SuccessExitStatus = 0 11
+
+[Install]
+WantedBy = ganeti-master.target ganeti.target

doc/examples/systemd/ganeti-metad.service.in

+[Unit]
+Description = Ganeti instance metadata daemon (metad)
+Requires = ganeti-common.service
+After = ganeti-common.service
+PartOf = ganeti-noded.target
+
+[Service]
+Type = simple
+Group = @GNTDAEMONSGROUP@
+ExecStart = @SBINDIR@/ganeti-metad -f
+Restart = on-failure
+
+# ganeti-metad is started on-demand by noded, so there must be no Install
+# section.

doc/examples/systemd/ganeti-mond.service.in

+[Unit]
+Description = Ganeti monitoring daemon (mond)
+Documentation = man:ganeti-mond(8)
+Requires = ganeti-common.service
+After = ganeti-common.service
+PartOf = ganeti-node.target
+
+[Service]
+Type = simple
+User = @GNTMONDUSER@
+Group = @GNTMONDGROUP@
+ExecStart = @SBINDIR@/ganeti-mond -f
+Restart = on-failure
+
+[Install]
+WantedBy = ganeti-node.target ganeti.target

doc/examples/systemd/ganeti-node.target

+[Unit]
+Description = Ganeti node functionality
+Documentation = man:ganeti(7)
+After = syslog.service
+PartOf = ganeti.target
+
+[Install]
+WantedBy = ganeti.target

doc/examples/systemd/ganeti-noded.service.in

+[Unit]
+Description = Ganeti node daemon (noded)
+Documentation = man:ganeti-noded(8)
+After = ganeti-common.service
+Requires = ganeti-common.service
+PartOf = ganeti-node.target
+ConditionPathExists = @LOCALSTATEDIR@/lib/ganeti/server.pem
+
+[Service]
+Type = simple
+User = @GNTNODEDUSER@
+Group = @GNTNODEDGROUP@
+ExecStart = @SBINDIR@/ganeti-noded -f
+Restart = on-failure
+# Important: do not kill any KVM processes
+KillMode = process
+
+[Install]
+WantedBy = ganeti-node.target ganeti.target

doc/examples/systemd/ganeti-rapi.service.in

+[Unit]
+Description = Ganeti RAPI daemon (rapi)
+Documentation = man:ganeti-rapi(8)
+Requires = ganeti-common.service
+Requisite = ganeti-masterd.service
+After = ganeti-common.service
+PartOf = ganeti-master.target
+ConditionPathExists = @LOCALSTATEDIR@/lib/ganeti/rapi.pem
+
+[Service]
+Type = simple
+User = @GNTRAPIUSER@
+Group = @GNTRAPIGROUP@
+ExecStart = @SBINDIR@/ganeti-rapi -f
+SuccessExitStatus = 0 11
+Restart = on-failure
+
+[Install]
+WantedBy = ganeti-master.target ganeti.target

doc/examples/systemd/ganeti-wconfd.service.in

+[Unit]
+Description = Ganeti config writer daemon (wconfd)
+Documentation = man:ganeti-wconfd(8)
+Requires = ganeti-common.service
+After = ganeti-common.service
+PartOf = ganeti-master.target
+ConditionPathExists = @LOCALSTATEDIR@/lib/ganeti/config.data
+
+[Service]
+Type = simple
+User = @GNTWCONFDUSER@
+Group = @GNTWCONFDGROUP@
+ExecStart = @SBINDIR@/ganeti-wconfd -f
+Restart = on-failure
+SuccessExitStatus = 0 11
+
+[Install]
+WantedBy = ganeti-master.target ganeti.target

doc/examples/systemd/ganeti.service

+# This is a dummy service, provided only for compatibility with SysV.
+# Systemd will automatically create a SysV service called
+# ganeti.service, attempting to start the initscript. Since there is no
+# way to tell systemd that the initscript acts as ganeti.target (and not
+# ganeti.service), we create a stub service requiring ganeti.target.
+#
+# This service is for compatibility only and so will not be marked for
+# installation.
+
+[Unit]
+Description = Dummy Ganeti SysV compatibility service
+Documentation = man:ganeti(7)
+After = ganeti.target
+Requires = ganeti.target
+
+[Service]
+Type = oneshot
+ExecStart = /bin/true

doc/examples/systemd/ganeti.target

+[Unit]
+Description = Ganeti virtualization cluster manager
+Documentation = man:ganeti(7)
+PartOf = ganeti.service
+
+[Install]
+WantedBy = multi-user.target
+Also = ganeti-node.target ganeti-master.target