diff --git a/.zuul.yaml b/.zuul.yaml
index 294dd48..3e6c42e 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -9,6 +9,16 @@
           - controller
 
 - nodeset:
+    name: openstack-single-node-noble
+    nodes:
+      - name: controller
+        label: ubuntu-noble
+    groups:
+      - name: tempest
+        nodes:
+          - controller
+
+- nodeset:
     name: openstack-single-node-focal
     nodes:
       - name: controller
@@ -58,6 +68,9 @@
         nodes:
           - controller
 
+# Note(sean-k-mooney): this is still used by horizon for
+# horizon-integration-tests, horizon-integration-pytest and
+# horizon-ui-pytest, remove when horizon is updated.
 - nodeset:
     name: devstack-single-node-debian-bullseye
     nodes:
@@ -79,16 +92,6 @@
           - controller
 
 - nodeset:
-    name: devstack-single-node-openeuler-22.03
-    nodes:
-      - name: controller
-        label: openEuler-22-03-LTS
-    groups:
-      - name: tempest
-        nodes:
-          - controller
-
-- nodeset:
     name: openstack-two-node-centos-9-stream
     nodes:
       - name: controller
@@ -149,6 +152,36 @@
           - compute1
 
 - nodeset:
+    name: openstack-two-node-noble
+    nodes:
+      - name: controller
+        label: ubuntu-noble
+      - name: compute1
+        label: ubuntu-noble
+    groups:
+      # Node where tests are executed and test results collected
+      - name: tempest
+        nodes:
+          - controller
+      # Nodes running the compute service
+      - name: compute
+        nodes:
+          - controller
+          - compute1
+      # Nodes that are not the controller
+      - name: subnode
+        nodes:
+          - compute1
+      # Switch node for multinode networking setup
+      - name: switch
+        nodes:
+          - controller
+      # Peer nodes for multinode networking setup
+      - name: peers
+        nodes:
+          - compute1
+
+- nodeset:
     name: openstack-two-node-focal
     nodes:
       - name: controller
@@ -423,6 +456,7 @@
         file_tracker: true
         mysql: true
         rabbit: true
+        openstack-cli-server: true
     group-vars:
       subnode:
         devstack_services:
@@ -430,6 +464,7 @@
           dstat: false
           memory_tracker: true
           file_tracker: true
+          openstack-cli-server: true
         devstack_localrc:
           # Multinode specific settings
           HOST_IP: "{{ hostvars[inventory_hostname]['nodepool']['private_ipv4'] }}"
@@ -477,7 +512,14 @@
       - opendev.org/openstack/swift
     timeout: 7200
     vars:
-      configure_swap_size: 4096
+      # based on observation of the integrated gate
+      # tempest-integrated-compute was only using ~1.7GB of swap
+      # when zswap and the host turning are enabled that increase
+      # slightly to ~2GB. we are setting the swap size to 8GB to
+      # be safe and account for more complex scenarios.
+      # we should revisit this value after some time to see if we
+      # can reduce it.
+      configure_swap_size: 8192
       devstack_localrc:
         # Common OpenStack services settings
         SWIFT_REPLICAS: 1
@@ -486,6 +528,26 @@
         DEBUG_LIBVIRT_COREDUMPS: true
         NOVA_VNC_ENABLED: true
         OVN_DBS_LOG_LEVEL: dbg
+        # tune the host to optimize memory usage and hide io latency
+        # these setting will configure the kernel to treat the host page
+        # cache and swap with equal priority, and prefer deferring writes
+        # changing the default swappiness, dirty_ratio and
+        # the vfs_cache_pressure
+        ENABLE_SYSCTL_MEM_TUNING: true
+        # the net tuning optimizes ipv4 tcp fast open and config the default
+        # qdisk policy to pfifo_fast which effectively disable all qos.
+        # this minimizes the cpu load of the host network stack
+        ENABLE_SYSCTL_NET_TUNING: true
+        # zswap allows the kernel to compress pages in memory before swapping
+        # them to disk. this can reduce the amount of swap used and improve
+        # performance. effectively this trades a small amount of cpu for an
+        # increase in swap performance by reducing the amount of data
+        # written to disk. the overall speedup is proportional to the
+        # compression ratio and the speed of the swap device.
+        # NOTE: this option is ignored when not using nova with the libvirt
+        # virt driver.
+        NOVA_LIBVIRT_TB_CACHE_SIZE: 128
+        ENABLE_ZSWAP: true
       devstack_local_conf:
         post-config:
           $NEUTRON_CONF:
@@ -578,6 +640,26 @@
           Q_HOST: "{{ hostvars['controller']['nodepool']['private_ipv4'] }}"
           NOVA_VNC_ENABLED: true
           ENABLE_CHASSIS_AS_GW: false
+          # tune the host to optimize memory usage and hide io latency
+          # these setting will configure the kernel to treat the host page
+          # cache and swap with equal priority, and prefer deferring writes
+          # changing the default swappiness, dirty_ratio and
+          # the vfs_cache_pressure
+          ENABLE_SYSCTL_MEM_TUNING: true
+          # the net tuning optimizes ipv4 tcp fast open and config the default
+          # qdisk policy to pfifo_fast which effectively disable all qos.
+          # this minimizes the cpu load of the host network stack
+          ENABLE_SYSCTL_NET_TUNING: true
+          # zswap allows the kernel to compress pages in memory before swapping
+          # them to disk. this can reduce the amount of swap used and improve
+          # performance. effectivly this trades a small amount of cpu for an
+          # increase in swap performance by reducing the amount of data
+          # written to disk. the overall speedup is porportional to the
+          # compression ratio and the speed of the swap device.
+          ENABLE_ZSWAP: true
+          # NOTE: this option is ignored when not using nova with the libvirt
+          # virt driver.
+          NOVA_LIBVIRT_TB_CACHE_SIZE: 128
 
 - job:
     name: devstack-ipv6
@@ -630,15 +712,6 @@
       configure_swap_size: 4096
 
 - job:
-    name: devstack-platform-debian-bullseye
-    parent: tempest-full-py3
-    description: Debian Bullseye platform test
-    nodeset: devstack-single-node-debian-bullseye
-    timeout: 9000
-    vars:
-      configure_swap_size: 4096
-
-- job:
     name: devstack-platform-rocky-blue-onyx
     parent: tempest-full-py3
     description: Rocky Linux 9 Blue Onyx platform test
@@ -652,6 +725,17 @@
     vars:
       configure_swap_size: 4096
 
+
+- job:
+    name: devstack-platform-ubuntu-noble
+    parent: tempest-full-py3
+    description: Ubuntu 24.04 LTS (noble) platform test
+    nodeset: openstack-single-node-noble
+    timeout: 9000
+    voting: false
+    vars:
+      configure_swap_size: 8192
+
 - job:
     name: devstack-platform-ubuntu-jammy-ovn-source
     parent: devstack-platform-ubuntu-jammy
@@ -704,62 +788,6 @@
           q-agt: true
 
 - job:
-    name: devstack-platform-openEuler-22.03-ovn-source
-    parent: tempest-full-py3
-    description: openEuler 22.03 LTS platform test (OVN)
-    nodeset: devstack-single-node-openeuler-22.03
-    voting: false
-    timeout: 9000
-    vars:
-      configure_swap_size: 4096
-      devstack_localrc:
-        # NOTE(wxy):  OVN package is not supported by openEuler yet. Build it
-        # from source instead.
-        OVN_BUILD_FROM_SOURCE: True
-        OVN_BRANCH: "v21.06.0"
-        OVS_BRANCH: "a4b04276ab5934d087669ff2d191a23931335c87"
-        OVS_SYSCONFDIR: "/usr/local/etc/openvswitch"
-
-- job:
-    name: devstack-platform-openEuler-22.03-ovs
-    parent: tempest-full-py3
-    description: openEuler 22.03 LTS platform test (OVS)
-    nodeset: devstack-single-node-openeuler-22.03
-    voting: false
-    timeout: 9000
-    vars:
-      configure_swap_size: 8192
-      devstack_localrc:
-        Q_AGENT: openvswitch
-        Q_ML2_PLUGIN_MECHANISM_DRIVERS: openvswitch
-        Q_ML2_TENANT_NETWORK_TYPE: vxlan
-      devstack_services:
-        # Disable OVN services
-        ovn-northd: false
-        ovn-controller: false
-        ovs-vswitchd: false
-        ovsdb-server: false
-        # Disable Neutron ML2/OVN services
-        q-ovn-metadata-agent: false
-        # Enable Neutron ML2/OVS services
-        q-agt: true
-        q-dhcp: true
-        q-l3: true
-        q-meta: true
-        q-metering: true
-    group-vars:
-      subnode:
-        devstack_services:
-          # Disable OVN services
-          ovn-controller: false
-          ovs-vswitchd: false
-          ovsdb-server: false
-          # Disable Neutron ML2/OVN services
-          q-ovn-metadata-agent: false
-          # Enable Neutron ML2/OVS services
-          q-agt: true
-
-- job:
     name: devstack-no-tls-proxy
     parent: tempest-full-py3
     description: |
@@ -845,12 +873,10 @@
         - devstack-enforce-scope
         - devstack-platform-centos-9-stream
         - devstack-platform-debian-bookworm
-        - devstack-platform-debian-bullseye
         - devstack-platform-rocky-blue-onyx
         - devstack-platform-ubuntu-jammy-ovn-source
         - devstack-platform-ubuntu-jammy-ovs
-        - devstack-platform-openEuler-22.03-ovn-source
-        - devstack-platform-openEuler-22.03-ovs
+        - devstack-platform-ubuntu-noble
         - devstack-multinode
         - devstack-unit-tests
         - openstack-tox-bashate
@@ -891,7 +917,6 @@
         - devstack
         - devstack-ipv6
         - devstack-platform-debian-bookworm
-        - devstack-platform-debian-bullseye
         # NOTE(danms): Disabled due to instability, see comment in the job
         # definition above.
         # - devstack-platform-rocky-blue-onyx
@@ -926,7 +951,9 @@
     # pruned.
     #
     # * nova-next: maintained by nova for unreleased/undefaulted
-    #    things
+    #    things, this job is not experimental but often is used to test
+    #    things that are not yet production ready or to test what will be
+    #    the new default after a deprecation period has ended.
     # * neutron-fullstack-with-uwsgi: maintained by neutron for fullstack test
     #    when neutron-api is served by uwsgi, it's in exprimental for testing.
     #    the next cycle we can remove this  job if things turn out to be
@@ -936,7 +963,7 @@
     #    stable engouh with uwsgi.
     # * neutron-ovn-tempest-with-uwsgi: maintained by neutron for tempest test.
     #    Next cycle we can remove this if everything run out stable enough.
-    # * nova-multi-cell: maintained by nova and currently non-voting in the
+    # * nova-multi-cell: maintained by nova and now is voting in the
     #    check queue for nova changes but relies on devstack configuration
 
     experimental:
@@ -974,9 +1001,6 @@
       jobs:
         - devstack-platform-centos-9-stream
         - devstack-platform-debian-bookworm
-        - devstack-platform-debian-bullseye
         - devstack-platform-rocky-blue-onyx
         - devstack-platform-ubuntu-jammy-ovn-source
         - devstack-platform-ubuntu-jammy-ovs
-        - devstack-platform-openEuler-22.03-ovn-source
-        - devstack-platform-openEuler-22.03-ovs
diff --git a/inc/python b/inc/python
index 43b06eb..2339afd 100644
--- a/inc/python
+++ b/inc/python
@@ -41,7 +41,7 @@
         # This package is currently installed via the distro and not
         # available on pypi.
         python$PYTHON3_VERSION -m venv --system-site-packages $DEVSTACK_VENV
-        pip_install -U pip
+        pip_install -U pip setuptools
     fi
     if [[ ":$PATH:" != *":$DEVSTACK_VENV/bin:"* ]] ; then
         export PATH="$DEVSTACK_VENV/bin:$PATH"
diff --git a/lib/infra b/lib/infra
index b983f2b..2aad003 100644
--- a/lib/infra
+++ b/lib/infra
@@ -31,7 +31,7 @@
     local PIP_VIRTUAL_ENV="$REQUIREMENTS_DIR/.venv"
     [ ! -d $PIP_VIRTUAL_ENV ] && ${VIRTUALENV_CMD} $PIP_VIRTUAL_ENV
     # We don't care about testing git pbr in the requirements venv.
-    PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install -U pbr
+    PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install -U pbr setuptools
     PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install $REQUIREMENTS_DIR
 
     # Unset the PIP_VIRTUAL_ENV so that PBR does not end up trapped
diff --git a/lib/nova b/lib/nova
index ee3f29e..7c6ffb2 100644
--- a/lib/nova
+++ b/lib/nova
@@ -173,6 +173,9 @@
 # Whether to use Keystone unified limits instead of legacy quota limits.
 NOVA_USE_UNIFIED_LIMITS=$(trueorfalse False NOVA_USE_UNIFIED_LIMITS)
 
+# TB Cache Size in MiB for qemu guests
+NOVA_LIBVIRT_TB_CACHE_SIZE=${NOVA_LIBVIRT_TB_CACHE_SIZE:-0}
+
 # Functions
 # ---------
 
@@ -1071,6 +1074,9 @@
     fi
 
     if [[ "$VIRT_DRIVER" = 'libvirt' ]]; then
+        if [ ${NOVA_LIBVIRT_TB_CACHE_SIZE} -gt 0 ]; then
+            iniset $NOVA_CPU_CONF libvirt tb_cache_size ${NOVA_LIBVIRT_TB_CACHE_SIZE}
+        fi
         # The group **$LIBVIRT_GROUP** is added to the current user in this script.
         # ``sg`` is used in run_process to execute nova-compute as a member of the
         # **$LIBVIRT_GROUP** group.
diff --git a/stack.sh b/stack.sh
index 0c36e10..ab3f01c 100755
--- a/stack.sh
+++ b/stack.sh
@@ -230,7 +230,7 @@
 
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``FORCE=yes ./stack``
-SUPPORTED_DISTROS="bookworm|bullseye|jammy|rhel8|rhel9|openEuler-22.03"
+SUPPORTED_DISTROS="bookworm|jammy|noble|rhel9"
 
 if [[ ! ${DISTRO} =~ $SUPPORTED_DISTROS ]]; then
     echo "WARNING: this script has not been tested on $DISTRO"
@@ -307,8 +307,8 @@
             # rdo-release.el8.rpm points to latest RDO release, use that for master
             sudo dnf -y install https://rdoproject.org/repos/rdo-release.el8.rpm
         else
-            # For stable branches use corresponding release rpm
-            rdo_release=$(echo $TARGET_BRANCH | sed "s|stable/||g")
+            # For stable/unmaintained branches use corresponding release rpm
+            rdo_release=${TARGET_BRANCH#*/}
             sudo dnf -y install https://rdoproject.org/repos/openstack-${rdo_release}/rdo-release-${rdo_release}.el8.rpm
         fi
     elif [[ $DISTRO == "rhel9" ]]; then
@@ -316,8 +316,8 @@
             # rdo-release.el9.rpm points to latest RDO release, use that for master
             sudo dnf -y install https://rdoproject.org/repos/rdo-release.el9.rpm
         else
-            # For stable branches use corresponding release rpm
-            rdo_release=$(echo $TARGET_BRANCH | sed "s|stable/||g")
+            # For stable/unmaintained branches use corresponding release rpm
+            rdo_release=${TARGET_BRANCH#*/}
             sudo dnf -y install https://rdoproject.org/repos/openstack-${rdo_release}/rdo-release-${rdo_release}.el9.rpm
         fi
     fi
diff --git a/stackrc b/stackrc
index de81f01..b379597 100644
--- a/stackrc
+++ b/stackrc
@@ -126,10 +126,6 @@
     source $RC_DIR/.localrc.password
 fi
 
-# Control whether Python 3 should be used at all.
-# TODO(frickler): Drop this when all consumers are fixed
-export USE_PYTHON3=True
-
 # Adding the specific version of Python 3 to this variable will install
 # the app using that version of the interpreter instead of just 3.
 _DEFAULT_PYTHON3_VERSION="$(_get_python_version python3)"