Add libvirt resource type for create_devstack.sh

This makes it possible to set up a local devstack on libvirt. It is
probably not useful for running the full e2e suite (unless you have a
very beefy PC), but it is enough for development with Tilt.

Signed-off-by: Lennart Jern <lennart.jern@est.tech>

Author: lentzi90

hack/ci/create_devstack.sh

@@ -47,6 +47,9 @@ PRIVATE_NETWORK_CIDR=${PRIVATE_NETWORK_CIDR:-"10.0.3.0/24"}
 CONTROLLER_IP=${CONTROLLER_IP:-"10.0.3.15"}
 WORKER_IP=${WORKER_IP:-"10.0.3.16"}
 
+SKIP_INIT_INFRA=${SKIP_INIT_INFRA:-}
+SKIP_SECONDARY_AZ=${SKIP_SECONDARY_AZ:-}
+
 PRIMARY_AZ=testaz1
 SECONDARY_AZ=testaz2
 
@@ -273,7 +276,11 @@ function main() {
     # is available, and wait if it is not.
     #
     # For efficiency, tests which require multi-AZ SHOULD run as late as possible.
-    create_worker
+    if [[ -n "${SKIP_SECONDARY_AZ:-}" ]]; then
+        echo "Skipping worker creation..."
+    else
+        create_worker
+    fi
 
     public_ip=$(get_public_ip)
     cat << EOF > "${REPO_ROOT_ABSOLUTE}/clouds.yaml"

hack/ci/libvirt.sh

@@ -0,0 +1,140 @@
+#!/usr/bin/env bash
+
+# Copyright 2024 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# 	http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# hack script for preparing libvirt to run cluster-api-provider-openstack e2e
+
+set -x -o errexit -o nounset -o pipefail
+
+# Required environment variables:
+# SSH_PUBLIC_KEY_FILE
+# SSH_PRIVATE_KEY_FILE
+# LIBVIRT_NETWORK_NAME
+
+function cloud_init {
+    LIBVIRT_NETWORK_NAME=${LIBVIRT_NETWORK_NAME:-${CLUSTER_NAME}-network}
+    LIBVIRT_IMAGE_NAME=${LIBVIRT_IMAGE_NAME:-ubuntu-2204-lts}
+
+    LIBVIRT_MEMORY=${LIBVIRT_MEMORY:-8192}
+    LIBVIRT_MEMORY_controller=${LIBVIRT_MEMORY_controller:-$LIBVIRT_MEMORY}
+    LIBVIRT_MEMORY_worker=${LIBVIRT_MEMORY_worker:-$LIBVIRT_MEMORY}
+
+    LIBVIRT_VCPU=${LIBVIRT_VCPU:-4}
+    LIBVIRT_VCPU_controller=${LIBVIRT_VCPU_controller:-$LIBVIRT_VCPU}
+    LIBVIRT_VCPU_worker=${LIBVIRT_VCPU_worker:-$LIBVIRT_VCPU}
+
+    LIBVIRT_MAC_controller="00:60:2f:32:81:00"
+    LIBVIRT_MAC_worker="00:60:2f:32:81:01"
+}
+
+function init_infrastructure() {
+    if ! virsh net-info "${LIBVIRT_NETWORK_NAME}" &>/dev/null; then
+        virsh net-define <(cat <<EOF
+<network>
+  <name>${LIBVIRT_NETWORK_NAME}</name>
+  <forward mode='nat'>
+    <nat>
+      <port start='1024' end='65535'/>
+    </nat>
+  </forward>
+  <bridge name="capobr0" stp="on" delay="0"/>
+  <ip address="${PRIVATE_NETWORK_CIDR%/*}" netmask="255.255.255.0">
+    <dhcp>
+      <range start="${PRIVATE_NETWORK_CIDR%.*}.10" end="${PRIVATE_NETWORK_CIDR%.*}.199"/>
+      <host mac="${LIBVIRT_MAC_controller}" name='controller' ip="${CONTROLLER_IP}"/>
+      <host mac="${LIBVIRT_MAC_worker}" name='worker' ip="${WORKER_IP}"/>
+    </dhcp>
+  </ip>
+</network>
+EOF
+)
+        virsh net-start "${LIBVIRT_NETWORK_NAME}"
+        virsh net-autostart "${LIBVIRT_NETWORK_NAME}"
+    fi
+
+    if [ ! -f "/tmp/${LIBVIRT_IMAGE_NAME}.qcow2" ]; then
+        curl -o "/tmp/${LIBVIRT_IMAGE_NAME}.qcow2" https://cloud-images.ubuntu.com/releases/jammy/release/ubuntu-22.04-server-cloudimg-amd64.img
+    fi
+}
+
+function create_vm {
+    local name=$1 && shift
+    local ip=$1 && shift
+    local userdata=$1 && shift
+    local public=$1 && shift
+
+    local memory=LIBVIRT_MEMORY_${name}
+    memory=${!memory}
+    local vcpu=LIBVIRT_VCPU_${name}
+    vcpu=${!vcpu}
+    local servername="${CLUSTER_NAME}-${name}"
+    local mac=LIBVIRT_MAC_${name}
+    mac=${!mac}
+
+    # Values which weren't initialised if we skipped init_infrastructure. Use names instead.
+    networkid=${networkid:-${LIBVIRT_NETWORK_NAME}}
+    volumeid=${volumeid:-${LIBVIRT_IMAGE_NAME}_${name}.qcow2}
+
+    sudo cp "/tmp/${LIBVIRT_IMAGE_NAME}.qcow2" "/var/lib/libvirt/images/${volumeid}"
+    sudo qemu-img resize "/var/lib/libvirt/images/${volumeid}" +200G
+
+    local serverid
+    local serverid
+    if ! virsh dominfo "${servername}" &>/dev/null; then
+        sudo virt-install \
+            --name "${servername}" \
+            --memory "${memory}" \
+            --vcpus "${vcpu}" \
+            --import \
+            --disk "/var/lib/libvirt/images/${volumeid},format=qcow2,bus=virtio" \
+            --network network="${networkid}",mac="${mac}" \
+            --os-variant=ubuntu22.04 \
+            --graphics none \
+            --cloud-init user-data="${userdata}" \
+            --noautoconsole
+    fi
+}
+
+function get_public_ip {
+    echo "${CONTROLLER_IP}"
+}
+
+function get_mtu {
+    # Set MTU statically for libvirt
+    echo 1500
+}
+
+function get_ssh_public_key_file {
+    echo "${SSH_PUBLIC_KEY_FILE}"
+}
+
+function get_ssh_private_key_file {
+    # Allow this to be unbound. This is handled in create_devstack.sh
+    echo "${SSH_PRIVATE_KEY_FILE:-}"
+}
+
+function cloud_cleanup {
+    for serverid in $(virsh list --all --name | grep -E "${CLUSTER_NAME}-controller|${CLUSTER_NAME}-worker"); do
+        virsh destroy "${serverid}"
+        virsh undefine "${serverid}" --remove-all-storage
+    done
+
+    for networkid in $(virsh net-list --name | grep -E "${CLUSTER_NAME}"); do
+        virsh net-destroy "${networkid}"
+        virsh net-undefine "${networkid}"
+    done
+
+    true
+}