Ensure MAAS squashfsi are clean of passwords. LP: #1764991.

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.524) UNRELEASED; urgency=medium
+
+  * Ensure MAAS squashfsi are clean of passwords. LP: #1764991.
+
+ -- Dimitri John Ledkov <xnox@ubuntu.com>  Thu, 19 Apr 2018 21:22:25 +0100
+
 livecd-rootfs (2.523) bionic; urgency=medium
 
   * Allow the configuration of model assertions independent of preseeding

live-build/ubuntu-server/hooks/031-maas-squashfs.binary

@@ -44,6 +44,10 @@ mount_overlay "$SQUASH_ROOT/" "$OVERLAY_RACK_ROOT/" "$RACK_ROOT/" "RACK"
 
 setup_mountpoint $RACK_ROOT
 env DEBIAN_FRONTEND=noninteractive chroot $RACK_ROOT apt-get -y install maas-rack-controller
+rm -f $RACK_ROOT/etc/maas/rackd.conf
+chroot $RACK_ROOT sh -c 'echo RESET maas/default-maas-url | debconf-communicate maas-common'
+chroot $RACK_ROOT sh -c 'echo RESET maas-rack-controller/maas-url | debconf-communicate maas-common'
+chroot $RACK_ROOT sh -c 'echo RESET maas-rack-controller/maas-url | debconf-communicate maas-rack-controller'
 teardown_mountpoint $RACK_ROOT
 
 umount "$RACK_ROOT"
@@ -53,8 +57,23 @@ umount "$RACK_ROOT"
 mount_overlay "$OVERLAY_RACK_ROOT/:$SQUASH_ROOT/" "$OVERLAY_REGION_ROOT/" "$REGION_ROOT/" "REGION"
 
 setup_mountpoint $REGION_ROOT
+
 env DEBIAN_FRONTEND=noninteractive chroot $REGION_ROOT apt-get -y install maas
-chroot $REGION_ROOT pg_ctlcluster 10 main stop
+
+# Forget how things had to be configured
+chroot $REGION_ROOT debconf -fnoninteractive -omaas-region-controller /var/lib/dpkg/info/maas-region-controller.prerm remove
+chroot $REGION_ROOT debconf -fnoninteractive -omaas-region-controller /var/lib/dpkg/info/maas-region-controller.postrm remove
+chroot $REGION_ROOT debconf -fnoninteractive -omaas-region-controller /var/lib/dpkg/info/maas-region-controller.postrm purge
+chroot $REGION_ROOT sh -c 'echo RESET maas/default-maas-url | debconf-communicate maas-common'
+chroot $REGION_ROOT sudo -u postgres psql -c 'alter role maas password null;'
+rm -f $REGION_ROOT/etc/maas/rackd.conf
+rm -f $REGION_ROOT/etc/maas/regiond.conf
+chroot $REGION_ROOT pg_ctlcluster $(/bin/ls $REGION_ROOT/var/lib/postgresql/) main stop || :
+
+# After the install, one may call the below to "reconfigure" maas-region-controller
+## debconf -fnoninteractive -omaas-region-controller /var/lib/dpkg/info/maas-region-controller.config configure
+## debconf -fnoninteractive -omaas-region-controller /var/lib/dpkg/info/maas-region-controller.postinst configure
+
 teardown_mountpoint "$REGION_ROOT"
 
 umount "$REGION_ROOT"