Add the DFW3 region for Rackspace Flex

This is a new region we can start using. Start uploading images for
now, we'll raise the max-servers value for this region as well as
SJC3 once they both have images available.

Change-Id: I7da5d182a21de4f203ab5f4991882ecb8f23ab60

nodepool/nl01.opendev.org.yaml

@@ -192,6 +192,97 @@ providers:
         max-servers: 195
         labels: *provider_pools_labels
 
+  - name: raxflex-dfw3
+    region-name: 'DFW3'
+    # Changing this cloud value impacts things like mirror names in jobs.
+    # It should be changed carefully.
+    cloud: raxflex
+    boot-timeout: 120
+    launch-timeout: 600
+    diskimages: *provider_diskimages
+    pools:
+      - name: main
+        max-servers: 0
+        networks:
+          - opendevzuul-network1
+        labels:
+          - name: centos-9-stream
+            flavor-name: 'gp.0.4.8'
+            diskimage: centos-9-stream
+            key-name: infra-root-keys-2024-04-08
+          - name: debian-bookworm
+            flavor-name: 'gp.0.4.8'
+            diskimage: debian-bookworm
+            key-name: infra-root-keys-2024-04-08
+          - name: debian-bullseye
+            flavor-name: 'gp.0.4.8'
+            diskimage: debian-bullseye
+            key-name: infra-root-keys-2024-04-08
+          - name: rockylinux-8
+            flavor-name: 'gp.0.4.8'
+            diskimage: rockylinux-8
+            key-name: infra-root-keys-2024-04-08
+          - name: rockylinux-9
+            flavor-name: 'gp.0.4.8'
+            diskimage: rockylinux-9
+            key-name: infra-root-keys-2024-04-08
+          - name: ubuntu-bionic
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-bionic
+            key-name: infra-root-keys-2024-04-08
+          - name: ubuntu-focal
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-focal
+            key-name: infra-root-keys-2024-04-08
+          - name: ubuntu-jammy
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-jammy
+            key-name: infra-root-keys-2024-04-08
+          - name: ubuntu-noble
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-noble
+            key-name: infra-root-keys-2024-04-08
+          - name: ubuntu-xenial
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-xenial
+            key-name: infra-root-keys-2024-04-08
+          - name: openEuler-22-03-LTS
+            flavor-name: 'gp.0.4.8'
+            diskimage: openEuler-22-03-LTS
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-debian-bookworm
+            flavor-name: 'gp.0.4.8'
+            diskimage: debian-bookworm
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-debian-bullseye
+            flavor-name: 'gp.0.4.8'
+            diskimage: debian-bullseye
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-ubuntu-bionic
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-bionic
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-ubuntu-focal
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-focal
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-ubuntu-jammy
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-jammy
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-ubuntu-noble
+            flavor-name: 'gp.0.4.8'
+            diskimage: ubuntu-noble
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-centos-9-stream
+            flavor-name: 'gp.0.4.8'
+            diskimage: centos-9-stream
+            key-name: infra-root-keys-2024-04-08
+          - name: nested-virt-rockylinux-9
+            flavor-name: 'gp.0.4.8'
+            diskimage: rockylinux-9
+            key-name: infra-root-keys-2024-04-08
+
   - name: raxflex-sjc3
     region-name: 'SJC3'
     # Changing this cloud value impacts things like mirror names in jobs.

nodepool/nodepool.yaml

@@ -124,6 +124,38 @@ providers:
     image-upload-timeout: 21600
     diskimages: *provider_diskimages
 
+  - name: raxflex-dfw3
+    region-name: 'DFW3'
+    cloud: raxflex
+    rate: 0.001
+    # 6 hours
+    image-upload-timeout: 21600
+    # TODO(fungi): Use the global list again once the old images
+    # have been dropped there
+    diskimages:
+      - name: centos-9-stream
+        config-drive: true
+      - name: debian-bookworm
+        config-drive: true
+      - name: debian-bullseye
+        config-drive: true
+      - name: rockylinux-8
+        config-drive: true
+      - name: rockylinux-9
+        config-drive: true
+      - name: ubuntu-bionic
+        config-drive: true
+      - name: ubuntu-focal
+        config-drive: true
+      - name: ubuntu-jammy
+        config-drive: true
+      - name: ubuntu-noble
+        config-drive: true
+      - name: ubuntu-xenial
+        config-drive: true
+      - name: openEuler-22-03-LTS
+        config-drive: true
+
   - name: raxflex-sjc3
     region-name: 'SJC3'
     cloud: raxflex