feat: Adds ironic IPA image build tools

.github/workflows/build-ironic-images.yaml

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+---
+name: build-ironic-images
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - 'ironic-images/**'
+  push:
+    branches:
+      - main
+    paths:
+      - 'ironic-images/**'
+
+jobs:
+  build-ironic-images:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ironic-images/ipa-debian-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        id: setup-python
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+      - run: sudo apt update && sudo apt install -y debootstrap qemu-utils
+      - run: pip install -r requirements.txt
+        working-directory: ironic-images
+      - name: Build the IPA image
+        run: bash ipa-debian-bookworm.sh
+        env:
+          ELEMENTS_PATH: ${{ env.pythonLocation }}/share/ironic-python-agent-builder/dib:${{ github.workspace }}/ironic-images/custom_elements
+      - name: Dynamically set timestamp environment variable
+        run: echo "TIMESTAMP=$(date +"%Y%m%d%H%M%S")" >> $GITHUB_ENV
+      - name: Publish IPA Release
+        uses: softprops/action-gh-release@v2
+        with:
+          name: undercloud-ironic-ipa
+          tag_name: undercloud-ironic-ipa-${{ env.TIMESTAMP }}
+          make_latest: true
+          fail_on_unmatched_files: true
+          files: |
+            ironic-images/ipa-debian-bookworm/ipa-debian-bookworm.initramfs
+            ironic-images/ipa-debian-bookworm/ipa-debian-bookworm.kernel
+        if: ${{ github.ref == 'refs/heads/main' }}

ironic-images/README.md

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+# Undercloud Ironic Image Build
+
+The image build process is in github actions: `.github/workflows/build-ironic-images.yaml`

ironic-images/custom_elements/undercloud-ipa/install.d/50-sysctl-arp-ignore

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+#!/bin/bash
+
+# dib-lint: disable=set setu setpipefail indent
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -e
+
+cat > /etc/sysctl.d/99-undercloud-ipa-sysctl-arp-ignore.conf <<EOF
+# arp_ignore - INTEGER
+#   Define different modes for sending replies in response to
+#   received ARP requests that resolve local target IP addresses:
+#   0 - (default): reply for any local target IP address, configured
+#   on any interface
+#   1 - reply only if the target IP address is local address
+#   configured on the incoming interface
+#   2 - reply only if the target IP address is local address
+#   configured on the incoming interface and both with the
+#   sender's IP address are part from same subnet on this interface
+#   3 - do not reply for local addresses configured with scope host,
+#   only resolutions for global and link addresses are replied
+net.ipv4.conf.all.arp_ignore=2
+EOF

ironic-images/ipa-debian-bookworm/README.md

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+- Need to install package: debootstrap
+- Create virtualenv
+- pip install diskimage-builder ironic-python-agent-builder
+- ./ipa-debian-bookworm.sh

ironic-images/ipa-debian-bookworm/ipa-debian-bookworm.sh

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+#!/bin/bash
+
+# elements path - need to include both the ironic-python-agent-builder DIB packages
+# and our custom_elements packages
+# export ELEMENTS_PATH=/path/to/venv/share/ironic-python-agent-builder/dib:/path/to/custom_elements
+
+# distro version
+export DIB_RELEASE=bookworm
+
+diskimage-builder ipa-debian-bookworm.yaml

ironic-images/ipa-debian-bookworm/ipa-debian-bookworm.yaml

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+- imagename: ipa-debian-bookworm
+  elements:
+  - ironic-python-agent-ramdisk
+  - debian-minimal
+  - dynamic-login
+  - journal-to-console
+  - undercloud-ipa

ironic-images/ipa-debian-bookworm/package-installs.yaml

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+inetutils-ping:
+inetutils-telnet:
+mtr-tiny:
+tcpdump:
+systemd-timesyncd:
+bind9-dnsutils:

ironic-images/requirements.txt

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+diskimage-builder==3.33.0
+ironic-python-agent-builder==5.3.0
+python-keystoneclient==5.4.0
+python-swiftclient==4.6.0