By default, master-failover will call "herd start ganeti-wconfd" with
extra arguments such as --force-node.  That does not work with the
Shepherd, so the Guix service has a "force-start" action for this purpose.

diff --git a/lib/bootstrap.py b/lib/bootstrap.py
--- a/lib/bootstrap.py
+++ b/lib/bootstrap.py
@@ -1011,9 +1011,7 @@ def MasterFailover(no_voting=False):
 
   try:
     # Forcefully start WConfd so that we can access the configuration
-    result = utils.RunCmd([pathutils.DAEMON_UTIL,
-                           "start", constants.WCONFD, "--force-node",
-                           "--no-voting", "--yes-do-it"])
+    result = utils.RunCmd(["herd", "force-start", constants.WCONFD])
     if result.failed:
       raise errors.OpPrereqError("Could not start the configuration daemon,"
                                  " command %s had exitcode %s and error %s" %
r><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
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<div class='path'>path: <a href='/guix/log/?id=1192ae940434808560b3170107e4ce44855816c3'>root</a>/<a href='/guix/log/tests?id=1192ae940434808560b3170107e4ce44855816c3'>tests</a>/<a href='/guix/log/tests/status.scm?id=1192ae940434808560b3170107e4ce44855816c3'>status.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/status.scm?id=1192ae940434808560b3170107e4ce44855816c3&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-02-05 12:03:25 +0100'>2019-02-05</span></td><td><a href='/guix/commit/tests/status.scm?id=ba514b601ba6be15b823e0a12d4b6e42f9d2489e'>status: Keep track of the current build phase.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/status.scm (&lt;build&gt;)[phase]: New field.
(%phase-start-rx): New variable.
(update-build): Add clause to match %PHASE-START-RX and adjust the
'phase' field accordingly.
* tests/status.scm ("compute-status, build phase"): Add test
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-29 12:09:52 +0100'>2019-01-29</span></td><td><a href='/guix/commit/tests/status.scm?id=73a8681a16869a2b3a9da1c7ba9434e07a204e19'>status: Keep track of build completion as reported by build tools.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/status.scm (&lt;build&gt;)[completion]: New field.
(build): Add #:completion parameter.
(%percentage-line-rx, %fraction-line-rx): New variables.
(update-build): New procedure.
(compute-status): Add 'build-log' case.
* tests/status.scm ("compute-status, build completion"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-29 12:09:52 +0100'>2019-01-29</span></td><td><a href='/guix/commit/tests/status.scm?id=976ef2d97887d16eab8d4eb9dad811786b04d690'>status: Record more information about builds.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/status.scm (&lt;build&gt;): New record type.
(build, matching-build): New procedures.
(compute-status): Adjust to manipulate &lt;build&gt; records instead of
derivation file names in 'build-status-builds-completed' and
'build-status-building'.
(build-event-output-port)[process-line]: Use 'string-split' to preserve
spaces.
* tests/status.scm ("compute-status, builds + substitutes")
("compute-status, missing events"): Adjust to expect &lt;build&gt; records.
Produce complete "build-started" events.
("compute-status, multiplexed build output"): Likewise, and remove
"bar.drv" from 'builds-completed'.
</span></span></td><td>Ludovic Courtès</td></tr>