Add Fedora 32 to supported list and use as fedora-latest

This includes a workaround to a known dnsmasq >= 2.81 issue that
results in unanswered DHCP requests from instances as documented in the
following Neutron bug:

dnsmasq >= 2.81 not responding to DHCP requests with current q-dhcp configs
https://bugs.launchpad.net/neutron/+bug/1896945

For the time being we will attempt to downgrade to 2.80 to avoid this.

Related-Bug: #1896945
Change-Id: I3a760c43956221424926bd9dad0ebe9b28ae2b52

.zuul.yaml

@@ -72,7 +72,7 @@
     name: devstack-single-node-fedora-latest
     nodes:
       - name: controller
-        label: fedora-31
+        label: fedora-32
     groups:
       - name: tempest
         nodes:

stack.sh

@@ -221,7 +221,7 @@ write_devstack_version
 
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``FORCE=yes ./stack``
-if [[ ! ${DISTRO} =~ (bionic|focal|f30|f31|opensuse-15.0|opensuse-15.1|opensuse-tumbleweed|rhel8) ]]; then
+if [[ ! ${DISTRO} =~ (bionic|focal|f30|f31|f32|opensuse-15.0|opensuse-15.1|opensuse-tumbleweed|rhel8) ]]; then
     echo "WARNING: this script has not been tested on $DISTRO"
     if [[ "$FORCE" != "yes" ]]; then
         die $LINENO "If you wish to run this script anyway run with FORCE=yes"

tools/fixup_stuff.sh

@@ -143,6 +143,13 @@ function fixup_fedora {
     # overwriting works.  So this hacks around those packages that
     # have been dragged in by some other system dependency
     sudo rm -rf /usr/lib64/python3*/site-packages/PyYAML-*.egg-info
+
+    # NOTE(lyarwood): Workaround a known issue on Fedora with dnsmasq >= 2.81
+    # by downgrading to 2.80 for the time being.
+    # https://bugs.launchpad.net/neutron/+bug/1896945
+    if [[ "$DISTRO" == "f32" ]] && [[ $(rpm --queryformat %{VERSION} -q dnsmasq) != "2.80" ]]; then
+        sudo dnf downgrade dnsmasq-2.80 -y
+    fi
 }
 
 function fixup_suse {