Ganeti uses an internal tool to start/stop daemons during init and
upgrade.  This patch makes the tool use native Shepherd facilities.

diff --git a/daemons/daemon-util.in b/daemons/daemon-util.in
--- a/daemons/daemon-util.in
+++ b/daemons/daemon-util.in
@@ -184,6 +184,21 @@ use_systemctl() {
   return 1
 }
 
+# Checks if we should use the Shepherd to start/stop daemons
+use_shepherd() {
+  # Is Shepherd running as PID 1?
+  ps --no-headers -p 1 -o cmd | grep -q shepherd || return 1
+
+  type -p herd >/dev/null || return 1
+
+  # Does Shepherd know about Ganeti at all?
+  if herd status | grep -q ganeti; then
+    return 0
+  fi
+
+  return 1
+}
+
 # Prints path to PID file for a daemon.
 daemon_pidfile() {
   if [[ "$#" -lt 1 ]]; then
@@ -261,6 +276,13 @@ check() {
     else
       return 1
     fi
+  elif use_shepherd; then
+    activestate="$(herd status ${name})"
+    if echo $activestate | grep -q Running ; then
+      return 0
+    else
+      return 1
+    fi
   elif type -p start-stop-daemon >/dev/null; then
     start-stop-daemon --stop --signal 0 --quiet \
       --pidfile $pidfile --name "$name"
@@ -291,6 +313,20 @@ start() {
     return $?
   fi
 
+  if use_shepherd; then
+    if herd status "$name" | grep -q "disabled"; then
+      # The Shepherd will disable a service that has stopped, even if it exits
+      # gracefully.  Thus, we must re-enable it in case of a master failover.
+      herd enable "${name}"
+    fi
+    # Note: unlike systemd, which happily starts a service and returns success
+    # even if the daemon immediately exits, the Shepherd actually waits for it
+    # to come up.  Thus, ignore the exit status from 'herd start' in case of
+    # master daemons running on the wrong node, or ganeti-kvmd disabled, etc.
+    herd start "${name}"
+    return 0
+  fi
+
   # Read $<daemon>_ARGS and $EXTRA_<daemon>_ARGS
   eval local args="\"\$${ucname}_ARGS \$EXTRA_${ucname}_ARGS\""
 
@@ -336,6 +372,13 @@ stop() {
 
   if use_systemctl; then
     systemctl stop "${name}.service"
+  elif use_shepherd; then
+    if herd status | grep -q "$name"; then
+      herd stop "$name"
+    else
+      # Do not raise an error if the service has not been enabled.
+      return 0
+    fi
   elif type -p start-stop-daemon >/dev/null; then
     start-stop-daemon --stop --quiet --oknodo --retry 30 \
       --pidfile $pidfile --name "$name"
@@ -352,6 +395,9 @@ check_and_start() {
     if use_systemctl; then
       echo "${name} supervised by systemd but not running, will not restart."
       return 1
+    elif use_shepherd; then
+      echo "${name} supervised by shepherd but not running, will not restart."
+      return 1
     fi
 
     start $name
hor</th></tr>
<tr><td><span title='2018-09-02 15:43:51 +0200'>2018-09-02</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=20cbd4f5f4d08bc26c22eb40b6c1e55b02e93f23'>compile-as-derivation: Adjust %load-compiled-path.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/compile-as-derivation.scm: Set not only %load-path but also
%load-compiled-path.  This can avoid problems where a stale .go is
loaded.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-09 12:02:27 +0200'>2018-06-09</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=75e24d7b0e19ab2164aecb340e82d07d2b9714e7'>pull: Install the new Guix in a profile.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/pull.scm (%pull-version): New variable.
(build-from-source): Pass #:pull-version to BUILD.
(whole-package-for-legacy, derivation-&gt;manifest-entry): New procedure.
(build-and-install): Rewrite in terms of 'build-and-use-profile'.
* guix/scripts/system.scm (maybe-suggest-running-guix-pull)[latest]:
Switch to "/current".
* scripts/guix.in (augment-load-paths!): Remove use of
~/.config/guix/latest.
* build-aux/compile-as-derivation.scm: Replace "/guix/latest/" with
"/current/share/guile/site/X.Y"
* guix/scripts.scm (warn-about-old-distro)[age]: Check "/current"
instead of "/latest".
* doc/guix.texi (Invoking guix pull): Document it.
* doc/contributing.texi (Running Guix Before It Is Installed): Remove
footnote about abusing ~/.config/guix/latest.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-09 12:02:27 +0200'>2018-06-09</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=8a0d9bc8a3f153159d9e239a151c0fa98f1e12d8'>self: Produce a complete package with the 'guix' command.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/self.scm (guix-command): New procedure.
(compiled-guix): Add #:pull-version parameter.
[command, package]: New variables.
Honor PULL-VERSION.
(guix-derivation): Add #:pull-version and pass it to 'compiled-guix'.
* build-aux/build-self.scm (build-program): Add #:pull-version
parameter.  Pass it to 'guix-derivation'.
(build): Add #:pull-version and pass it to 'build-program'.
* build-aux/compile-as-derivation.scm: Pass #:pull-version to BUILD.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-04-08 17:48:25 +0200'>2018-04-08</span></td><td><a href='/guix/commit/build-aux/compile-as-derivation.scm?id=2cfc8d69644af6c53fed9128425e8ff70ad4509f'>build: Add 'as-derivation' target.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/compile-as-derivation.scm: New file.
* Makefile.am (as-derivation): New target.
(EXTRA_DIST): Add compile-as-derivation.scm.
</span></span></td><td>Ludovic Courtès</td></tr>