[Xen-devel] [PATCH v4 4/4] tools: make xenstore domain easy configurable

[Juergen Gross <jgross@xxxxxxxx>]

Add configuration entries to sysconfig.xencommons for selection of the
xenstore type (domain or daemon) and start the selected xenstore
service via a script called from sysvinit or systemd.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
V3: - remove check for running xenstore domain, as this is done in
      init-xenstore-domain already
    - if booted with systemd send a systemd-notify message in the
      xenstore domain case
    - if booted with systemd don't wait until xenstore daemon is
      running, as the daemon will have sent a notify message by its
      own
    - split up patch as requested by Ian Jackson

V2: - add .gitignore entry for launch-xenstore
---
 tools/hotplug/Linux/init.d/sysconfig.xencommons.in | 42 ++++++++++++++++++++--
 tools/hotplug/Linux/launch-xenstore.in             | 42 ++++++++++++++++------
 tools/hotplug/Linux/systemd/xenstored.service.in   |  8 +----
 3 files changed, 72 insertions(+), 20 deletions(-)

diff --git a/tools/hotplug/Linux/init.d/sysconfig.xencommons.in 
b/tools/hotplug/Linux/init.d/sysconfig.xencommons.in
index c27a476..cc8185c 100644
--- a/tools/hotplug/Linux/init.d/sysconfig.xencommons.in
+++ b/tools/hotplug/Linux/init.d/sysconfig.xencommons.in
@@ -6,12 +6,24 @@
 #XENCONSOLED_TRACE=[none|guest|hv|all]
 
 ## Type: string
+## Default: daemon
+#
+# Select type of xentore service.
+#
+# This can be either of:
+#  * daemon
+#  * domain
+#
+# Changing this requires a reboot to take effect.
+#
+#XENSTORETYPE=daemon
+
+## Type: string
 ## Default: xenstored
 #
 # Select xenstore implementation, this can be either
-# of these below. If using systemd it's preferred that you
-# just edit the xenstored.service unit file and change
-# the XENSTORED variable there.
+# of these below.
+# Only evaluated if XENSTORETYPE is "daemon".
 #
 # This can be either of:
 #  * @sbindir@/oxenstored
@@ -26,21 +38,45 @@
 # Additional commandline arguments to start xenstored,
 # like "--trace-file @XEN_LOG_DIR@/xenstored-trace.log"
 # See "@sbindir@/xenstored --help" for possible options.
+# Only evaluated if XENSTORETYPE is "daemon".
 XENSTORED_ARGS=
 
 ## Type: string
 ## Default: Not defined, tracing off
 #
 # Log xenstored messages
+# Only evaluated if XENSTORETYPE is "daemon".
 #XENSTORED_TRACE=[yes|on|1]
 
 ## Type: string
 ## Default: "@XEN_LIB_STORED@"
 #
 # Running xenstored on XENSTORED_ROOTDIR
+# Only evaluated if XENSTORETYPE is "daemon".
 #XENSTORED_ROOTDIR=@XEN_LIB_STORED@
 
 ## Type: string
+## Default: @LIBEXEC@/boot/xenstore-stubdom.gz
+#
+# xenstore domain kernel.
+# Only evaluated if XENSTORETYPE is "domain".
+#XENSTORE_DOMAIN_KERNEL=@LIBEXEC@/boot/xenstore-stubdom.gz
+
+## Type: integer
+## Default: 8
+#
+# xenstore domain memory size in MiB.
+# Only evaluated if XENSTORETYPE is "domain".
+#XENSTORE_DOMAIN_SIZE=8
+
+## Type: string
+## Default: ""
+#
+# Additional arguments for starting the xenstore domain.
+# Only evaluated if XENSTORETYPE is "domain".
+XENSTORE_DOMAIN_ARGS=
+
+## Type: string
 ## Default: Not defined, xenbackendd debug mode off
 #
 # Running xenbackendd in debug mode
diff --git a/tools/hotplug/Linux/launch-xenstore.in 
b/tools/hotplug/Linux/launch-xenstore.in
index caa9345..cf98bd1 100644
--- a/tools/hotplug/Linux/launch-xenstore.in
+++ b/tools/hotplug/Linux/launch-xenstore.in
@@ -48,18 +48,40 @@ test_xenstore && exit 0
 
 test -f @CONFIG_DIR@/@CONFIG_LEAF_DIR@/xencommons && . 
@CONFIG_DIR@/@CONFIG_LEAF_DIR@/xencommons
 
-test -z "$XENSTORED_ROOTDIR" && XENSTORED_ROOTDIR="@XEN_LIB_STORED@"
-rm -f "$XENSTORED_ROOTDIR"/tdb* 2>/dev/null
-test -z "$XENSTORED_TRACE" || XENSTORED_ARGS=" -T 
@XEN_LOG_DIR@/xenstored-trace.log"
+[ "$XENSTORETYPE" = "" ] && XENSTORETYPE=daemon
+
+/bin/mkdir -p @XEN_RUN_DIR@
+
+[ "$XENSTORETYPE" = "daemon" ] && {
+       [ -z "$XENSTORED_ROOTDIR" ] && XENSTORED_ROOTDIR="@XEN_LIB_STORED@"
+       /bin/rm -f $XENSTORED_ROOTDIR/tdb* 2>/dev/null
+       [ -z "$XENSTORED_TRACE" ] || XENSTORED_ARGS="$XENSTORED_ARGS -T 
@XEN_LOG_DIR@/xenstored-trace.log"
+       [ -z "$XENSTORED" ] && XENSTORED=@XENSTORED@
+       [ -x "$XENSTORED" ] || {
+               echo "No xenstored found"
+               exit 1
+       }
 
-if [ -n "$XENSTORED" ] ; then
        echo -n Starting $XENSTORED...
        $XENSTORED --pid-file @XEN_RUN_DIR@/xenstored.pid $XENSTORED_ARGS
-else
-       echo "No xenstored found"
-       exit 1
-fi
 
-timeout_xenstore $XENSTORED || exit 1
+       systemd-notify --booted 2>/dev/null || timeout_xenstore $XENSTORED || 
exit 1
 
-exit 0
+       exit 0
+}
+
+[ "$XENSTORETYPE" = "domain" ] && {
+       [ -z "$XENSTORE_DOMAIN_KERNEL" ] && 
XENSTORE_DOMAIN_KERNEL=@LIBEXEC@/boot/xenstore-stubdom.gz
+       XENSTORE_DOMAIN_ARGS="$XENSTORE_DOMAIN_ARGS --kernel 
$XENSTORE_DOMAIN_KERNEL"
+       [ -z "$XENSTORE_DOMAIN_SIZE" ] && XENSTORE_DOMAIN_SIZE=8
+       XENSTORE_DOMAIN_ARGS="$XENSTORE_DOMAIN_ARGS --memory 
$XENSTORE_DOMAIN_SIZE"
+
+       echo -n Starting $XENSTORE_DOMAIN_KERNEL...
+       ${LIBEXEC_BIN}/init-xenstore-domain $XENSTORE_DOMAIN_ARGS || exit 1
+       systemd-notify --ready 2>/dev/null
+
+       exit 0
+}
+
+echo "illegal value $XENSTORETYPE for XENSTORETYPE"
+exit 1
diff --git a/tools/hotplug/Linux/systemd/xenstored.service.in 
b/tools/hotplug/Linux/systemd/xenstored.service.in
index d520d70..80c1d40 100644
--- a/tools/hotplug/Linux/systemd/xenstored.service.in
+++ b/tools/hotplug/Linux/systemd/xenstored.service.in
@@ -10,14 +10,8 @@ ConditionPathExists=/proc/xen/capabilities
 Type=notify
 NotifyAccess=all
 RemainAfterExit=true
-KillMode=none
-Environment=XENSTORED_ARGS=
-Environment=XENSTORED=@XENSTORED@
-EnvironmentFile=-@CONFIG_DIR@/@CONFIG_LEAF_DIR@/xencommons
 ExecStartPre=/bin/grep -q control_d /proc/xen/capabilities
-ExecStartPre=-/bin/rm -f @XEN_LIB_STORED@/tdb*
-ExecStartPre=/bin/mkdir -p @XEN_RUN_DIR@
-ExecStart=/bin/sh -c "exec $XENSTORED --no-fork $XENSTORED_ARGS"
+ExecStart=@XEN_SCRIPT_DIR@/launch-xenstore
 
 [Install]
 WantedBy=multi-user.target
-- 
2.6.6


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