.gitea/workflows/build.yaml

@@ -2,6 +2,12 @@ name: Build containers
 
 on:
   workflow_dispatch:
+    inputs:
+      image:
+        description: Image to build
+        type: choice
+        options: [all, fedora-cosmic, fedora-remote, fedora-intune]
+        default: all
   pull_request:
     branches: ["main"]
   push:
@@ -15,11 +21,17 @@ jobs:
   changes:
     name: Compute changes
     runs-on: job-v2
+    # The runner has no git: without it actions/checkout falls back to a
+    # tarball with no history, `git diff` fails and every image is rebuilt.
+    container:
+      image: "quay.io/fedora-ostree-desktops/buildroot:44"
     outputs:
       cosmic: ${{ steps.changes.outputs.cosmic }}
       remote: ${{ steps.changes.outputs.remote }}
       intune: ${{ steps.changes.outputs.intune }}
     steps:
+      - name: Install tools
+        run: dnf install -y nodejs git
       - name: Checkout
         uses: actions/checkout@v4
         with:
@@ -27,17 +39,53 @@ jobs:
       - name: Detect changed images
         id: changes
         shell: bash
+        env:
+          EVENT: ${{ github.event_name }}
+          BEFORE: ${{ github.event.before }}
+          SHA: ${{ github.sha }}
+          BASE_REF: ${{ github.base_ref }}
+          DISPATCH_IMAGE: ${{ inputs.image }}
         run: |
           set -euo pipefail
-          if [[ "${{ github.event_name }}" == "push" \
-                && -n "${{ github.event.before }}" \
-                && "${{ github.event.before }}" != "0000000000000000000000000000000000000000" ]]; then
-            changed="$(git diff --name-only "${{ github.event.before }}" "${{ github.sha }}" || true)"
-          elif [[ "${{ github.event_name }}" == "pull_request" ]]; then
-            changed="$(git diff --name-only "origin/${{ github.base_ref }}...HEAD" || true)"
+          # Diff the event's commits; any failure rebuilds everything, but
+          # say so instead of hiding it.
+          diff_or_all() {
+            if ! changed="$(git diff --name-only "$@")"; then
+              echo "::warning::git diff $* failed; rebuilding every image"
+              changed=""
+            elif [[ -z "${changed}" ]]; then
+              # Nothing changed (e.g. an empty merge): build nothing rather
+              # than everything.
+              changed="(none)"
+            fi
+          }
+          case "${EVENT}" in
+            push)
+              if [[ -n "${BEFORE}" && "${BEFORE}" != 0000000000000000000000000000000000000000 ]]; then
+                diff_or_all "${BEFORE}" "${SHA}"
+              else
+                echo "::warning::push without a previous commit; rebuilding every image"
+                changed=""
+              fi
+              ;;
+            pull_request)
+              diff_or_all "origin/${BASE_REF}...HEAD"
+              ;;
+            workflow_dispatch)
+              # Pretend the chosen image's directory changed; "all" (or no
+              # input) rebuilds everything.
+              if [[ -n "${DISPATCH_IMAGE}" && "${DISPATCH_IMAGE}" != all ]]; then
+                changed="images/${DISPATCH_IMAGE}/"
               else
                 changed=""
               fi
+              ;;
+            *)
+              # schedule: the weekly rebuild picks up package updates for all.
+              changed=""
+              ;;
+          esac
+          printf 'Changed paths:\n%s\n' "${changed:-(all)}"
           eval "$(printf '%s\n' "${changed}" | ./ci-changes.sh)"
           echo "cosmic=${cosmic}" >> "$GITHUB_OUTPUT"
           echo "remote=${remote}" >> "$GITHUB_OUTPUT"

images/fedora-intune/build.conf

@@ -4,7 +4,7 @@ BUILD_MODE=upstream
 
 UPSTREAM_REPO="https://gitlab.com/fedora/ostree/ci-test.git"
 
-# Stable only; Defender comes from Microsoft's RHEL 10 repo, not rawhide.
+# Stable only; Microsoft's Defender repo (fedora/44) has no rawhide build.
 declare -A UPSTREAM_REFS=(
   [44]=f44
 )

images/fedora-intune/defender.yaml

@@ -1,5 +1,5 @@
-# Microsoft Defender for Endpoint on Linux (mdatp), RHEL 10 build, from the
-# microsoft-rhel10 repo (repos/microsoft.repo).
+# Microsoft Defender for Endpoint on Linux (mdatp), Fedora 44 build, from the
+# microsoft-fedora44 repo (repos/microsoft.repo).
 #
 # mdatp's %post does the real install: units, SELinux module, and per-machine
 # state under /var/opt/microsoft/mdatp (machine GUID, definitions database,
@@ -11,7 +11,7 @@
 # from the Defender portal on the device.
 
 repo-packages:
-  - repo: microsoft-rhel10
+  - repo: microsoft-fedora44
     packages:
       - mdatp
 

images/fedora-intune/files/10-himmelblau-os-release.conf

@@ -0,0 +1,9 @@
+# Report the full image version (VERSION_ID=44.20261019.0) to Entra ID and
+# Intune instead of "44"; see /usr/libexec/himmelblau-os-release. Only this
+# service's mount namespace sees the replacement os-release.
+[Unit]
+Requires=himmelblau-os-release.service
+After=himmelblau-os-release.service
+
+[Service]
+BindReadOnlyPaths=/run/himmelblau-os-release:/etc/os-release

images/fedora-intune/files/50-himmelblau.preset

@@ -2,3 +2,5 @@
 enable himmelblaud.service
 enable himmelblaud-tasks.service
 enable himmelblau-hsm-pin-init.service
+# Runs the Intune custom configuration scripts Himmelblau puts in /etc/cron.d.
+enable crond.service

images/fedora-intune/files/himmelblau-os-release

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Write the os-release that the Himmelblau daemons see (10-os-release.conf):
+# the image's /usr/lib/os-release with VERSION_ID set to the full image version
+# (OSTREE_VERSION, e.g. 44.20261019.0), so Intune shows the build and not just
+# "44". Himmelblau reports VERSION_ID as the device's OS version and has no
+# setting for it. The rest of the system keeps the stock VERSION_ID, which
+# toolbox, flatpak and dnf expect to be the plain release.
+set -euo pipefail
+
+SRC=/usr/lib/os-release
+DEST=/run/himmelblau-os-release
+
+version="$(. "${SRC}" && echo "${OSTREE_VERSION:-${IMAGE_VERSION:-}}")"
+
+tmp="$(mktemp "${DEST}.XXXXXX")"
+if [[ -n "${version}" ]]; then
+  sed "s/^VERSION_ID=.*/VERSION_ID=${version}/" "${SRC}" > "${tmp}"
+else
+  # No image version (not an ostree/bootc deployment): pass it through as-is.
+  cat "${SRC}" > "${tmp}"
+fi
+chmod 0644 "${tmp}"
+mv -f "${tmp}" "${DEST}"

images/fedora-intune/files/himmelblau-os-release.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Generate the os-release reported by Himmelblau to Intune
+DefaultDependencies=no
+After=local-fs.target
+Before=himmelblaud.service himmelblaud-tasks.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/libexec/himmelblau-os-release
+RemainAfterExit=yes

images/fedora-intune/himmelblau.yaml

@@ -20,11 +20,18 @@ packages:
   # himmelblau-selinux compiles its policy module at install time.
   - make
   - selinux-policy-devel
+  # Intune custom configuration scripts are installed as /etc/cron.d jobs.
+  - cronie
 
 add-files:
   - ["himmelblau.conf", "/etc/himmelblau/himmelblau.conf"]
   - ["50-himmelblau.preset", "/usr/lib/systemd/system-preset/50-himmelblau.preset"]
   - ["50-himmelblau-user.preset", "/usr/lib/systemd/user-preset/50-himmelblau-user.preset"]
+  # Report the full image version (44.20261019.0) as the OS version in Intune.
+  - ["himmelblau-os-release", "/usr/libexec/himmelblau-os-release"]
+  - ["himmelblau-os-release.service", "/usr/lib/systemd/system/himmelblau-os-release.service"]
+  - ["10-himmelblau-os-release.conf", "/usr/lib/systemd/system/himmelblaud.service.d/10-os-release.conf"]
+  - ["10-himmelblau-os-release.conf", "/usr/lib/systemd/system/himmelblaud-tasks.service.d/10-os-release.conf"]
 
 postprocess:
   # The package's %post selects its authselect vendor profile but drops
@@ -38,6 +45,8 @@ postprocess:
       getent passwd "${user}" >/dev/null
     done
     grep -q pam_himmelblau.so /etc/pam.d/system-auth
+    chmod 0755 /usr/libexec/himmelblau-os-release
+    test -d /etc/cron.d
 
   # himmelblau-selinux builds and loads its module in %posttrans, which does
   # nothing in a compose; do it here.

images/fedora-intune/intune/defender-compliance.json

@@ -0,0 +1,102 @@
+{
+  "Rules": [
+    {
+      "SettingName": "DefenderInstalled",
+      "Operator": "IsEquals",
+      "DataType": "Boolean",
+      "Operand": true,
+      "MoreInfoUrl": "https://learn.microsoft.com/en-us/defender-endpoint/linux-install-manually",
+      "RemediationStrings": [
+        {
+          "Language": "en_US",
+          "Title": "Microsoft Defender is not installed.",
+          "Description": "Microsoft Defender for Endpoint (mdatp) must be installed on this device."
+        }
+      ]
+    },
+    {
+      "SettingName": "DefenderRunning",
+      "Operator": "IsEquals",
+      "DataType": "Boolean",
+      "Operand": true,
+      "MoreInfoUrl": "https://learn.microsoft.com/en-us/defender-endpoint/linux-install-manually",
+      "RemediationStrings": [
+        {
+          "Language": "en_US",
+          "Title": "Microsoft Defender is not running.",
+          "Description": "The Microsoft Defender service (mdatp.service) is not responding. Restart the device or contact IT."
+        }
+      ]
+    },
+    {
+      "SettingName": "DefenderOnboarded",
+      "Operator": "IsEquals",
+      "DataType": "Boolean",
+      "Operand": true,
+      "MoreInfoUrl": "https://learn.microsoft.com/en-us/defender-endpoint/linux-install-manually",
+      "RemediationStrings": [
+        {
+          "Language": "en_US",
+          "Title": "Microsoft Defender is not onboarded.",
+          "Description": "This device is not onboarded to your organization's Microsoft Defender tenant. Contact IT."
+        }
+      ]
+    },
+    {
+      "SettingName": "DefenderLicensed",
+      "Operator": "IsEquals",
+      "DataType": "Boolean",
+      "Operand": true,
+      "MoreInfoUrl": "https://learn.microsoft.com/en-us/defender-endpoint/linux-install-manually",
+      "RemediationStrings": [
+        {
+          "Language": "en_US",
+          "Title": "Microsoft Defender is not licensed.",
+          "Description": "Microsoft Defender has no valid license on this device. Contact IT."
+        }
+      ]
+    },
+    {
+      "SettingName": "DefenderHealthy",
+      "Operator": "IsEquals",
+      "DataType": "Boolean",
+      "Operand": true,
+      "MoreInfoUrl": "https://learn.microsoft.com/en-us/defender-endpoint/linux-install-manually",
+      "RemediationStrings": [
+        {
+          "Language": "en_US",
+          "Title": "Microsoft Defender reports a problem.",
+          "Description": "Run 'mdatp health' to see the reported issues, or contact IT."
+        }
+      ]
+    },
+    {
+      "SettingName": "DefenderRealTimeProtection",
+      "Operator": "IsEquals",
+      "DataType": "Boolean",
+      "Operand": true,
+      "MoreInfoUrl": "https://learn.microsoft.com/en-us/defender-endpoint/linux-install-manually",
+      "RemediationStrings": [
+        {
+          "Language": "en_US",
+          "Title": "Real-time protection is off.",
+          "Description": "Microsoft Defender real-time protection must be enabled."
+        }
+      ]
+    },
+    {
+      "SettingName": "DefenderDefinitionsUpToDate",
+      "Operator": "IsEquals",
+      "DataType": "Boolean",
+      "Operand": true,
+      "MoreInfoUrl": "https://learn.microsoft.com/en-us/defender-endpoint/linux-install-manually",
+      "RemediationStrings": [
+        {
+          "Language": "en_US",
+          "Title": "Microsoft Defender definitions are out of date.",
+          "Description": "Connect the device to the network so Microsoft Defender can update its security intelligence."
+        }
+      ]
+    }
+  ]
+}

images/fedora-intune/intune/defender-compliance.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+# Intune custom compliance discovery script for Linux: is Microsoft Defender
+# for Endpoint (mdatp) installed, onboarded, licensed and protecting?
+#
+# Upload in Intune > Devices > Compliance > Scripts (Linux), and pair it with
+# defender-compliance.json in a Linux compliance policy (Custom compliance).
+# Himmelblau runs it as root inside himmelblaud-tasks.service and sends the
+# JSON on stdout to Intune, which evaluates it against the rules. Every setting
+# is always emitted, so a missing or stopped Defender reads as non-compliant
+# instead of as a script error.
+
+MDATP=/usr/bin/mdatp
+
+# Print one `mdatp health` field without quotes or a trailing " [managed]".
+# Unlicensed or unonboarded, mdatp prints "ATTENTION: ..." lines first.
+field() {
+  "${MDATP}" health --field "$1" 2>/dev/null | grep -v '^ATTENTION' | tail -n1 \
+    | sed -e 's/ \[managed\]$//' -e 's/^"//' -e 's/"$//'
+}
+
+bool() {
+  [[ "$1" == true ]] && echo true || echo false
+}
+
+installed=false
+running=false
+healthy=false
+licensed=false
+onboarded=false
+rtp=false
+definitions_ok=false
+definitions_age=-1
+version=""
+
+if [[ -x "${MDATP}" ]]; then
+  installed=true
+  if [[ "$(field healthy)" =~ ^(true|false)$ ]]; then
+    # The daemon answered.
+    running=true
+    healthy="$(bool "$(field healthy)")"
+    licensed="$(bool "$(field licensed)")"
+    rtp="$(bool "$(field real_time_protection_enabled)")"
+    [[ -n "$(field org_id)" ]] && onboarded=true
+    [[ "$(field definitions_status)" == up_to_date ]] && definitions_ok=true
+    age="$(field definitions_updated_minutes_ago)"
+    [[ "${age}" =~ ^[0-9]+$ ]] && definitions_age=$(( age / 1440 ))
+    version="$(field app_version)"
+    version="${version//[^0-9A-Za-z._-]/}"
+  fi
+fi
+
+cat <<EOF
+{
+  "DefenderInstalled": ${installed},
+  "DefenderRunning": ${running},
+  "DefenderHealthy": ${healthy},
+  "DefenderLicensed": ${licensed},
+  "DefenderOnboarded": ${onboarded},
+  "DefenderRealTimeProtection": ${rtp},
+  "DefenderDefinitionsUpToDate": ${definitions_ok},
+  "DefenderDefinitionsAgeDays": ${definitions_age},
+  "DefenderVersion": "${version}"
+}
+EOF

images/fedora-intune/intune/defender-remediation.sh

@@ -0,0 +1,102 @@
+#!/bin/bash
+# Intune custom configuration script for Linux: bring Microsoft Defender for
+# Endpoint (mdatp) back to the state defender-compliance.sh checks for.
+#
+# Intune has no "run only when non-compliant" trigger for Linux, so this runs
+# on the policy's schedule and only acts on what is wrong; on a healthy device
+# it only reads `mdatp health`. Himmelblau installs it as an /etc/cron.d job.
+#
+# Intune > Devices > Configuration > Create > Linux > Settings catalog >
+# Custom Configuration:
+#   Execution context:   root
+#   Execution frequency: every 1 hour (or 15 minutes while rolling out)
+#   Execution retries:   1
+#   Script:              this file, with ONBOARDING_JSON filled in
+#
+# Exit status is non-zero when Defender is still not healthy afterwards.
+
+# Contents of mdatp_onboard.json from the Defender portal: Settings > Endpoints
+# > Onboarding > Linux Server > "Local Script (Python)". The downloaded
+# MicrosoftDefenderATPOnboardingLinuxServer.py writes this file to
+# /etc/opt/microsoft/mdatp/ on the machine it runs on; paste that file's
+# contents here. Leave the placeholder to skip onboarding.
+ONBOARDING_JSON=$(cat <<'JSON'
+REPLACE_WITH_MDATP_ONBOARD_JSON
+JSON
+)
+
+MDATP=/usr/bin/mdatp
+ONBOARD_FILE=/etc/opt/microsoft/mdatp/mdatp_onboard.json
+
+log() {
+  logger -t defender-remediation -- "$*"
+  echo "$*"
+}
+
+# Print one `mdatp health` field without quotes, a trailing " [managed]" or
+# the "ATTENTION: ..." lines mdatp prints while unlicensed.
+field() {
+  "${MDATP}" health --field "$1" 2>/dev/null | grep -v '^ATTENTION' | tail -n1 \
+    | sed -e 's/ \[managed\]$//' -e 's/^"//' -e 's/"$//'
+}
+
+# Wait up to 2 minutes for the daemon to answer.
+wait_for_daemon() {
+  local i
+  for i in $(seq 1 24); do
+    [[ "$(field healthy)" =~ ^(true|false)$ ]] && return 0
+    sleep 5
+  done
+  return 1
+}
+
+if [[ ! -x "${MDATP}" ]]; then
+  log "mdatp is not installed; it ships in the image, so update or rebase the device."
+  exit 1
+fi
+
+# The image finishes the Defender install on first boot (mdatp-firstboot).
+if [[ ! -f /var/lib/mdatp-firstboot.done ]]; then
+  log "Defender first-boot setup has not completed; starting it."
+  systemctl start mdatp-firstboot.service
+fi
+
+if ! systemctl is-active --quiet mdatp.service; then
+  log "mdatp.service is not running; restarting it."
+  systemctl restart mdatp.service
+fi
+if ! wait_for_daemon; then
+  log "The Defender daemon does not respond."
+  exit 1
+fi
+
+if [[ -z "$(field org_id)" ]]; then
+  if [[ "${ONBOARDING_JSON}" == REPLACE_WITH_MDATP_ONBOARD_JSON ]]; then
+    log "Defender is not onboarded and this script has no onboarding JSON."
+  else
+    log "Defender is not onboarded; writing ${ONBOARD_FILE}."
+    install -d -m 0755 "$(dirname "${ONBOARD_FILE}")"
+    printf '%s\n' "${ONBOARDING_JSON}" > "${ONBOARD_FILE}.tmp"
+    chown root:mdatp "${ONBOARD_FILE}.tmp"
+    chmod 0600 "${ONBOARD_FILE}.tmp"
+    mv -f "${ONBOARD_FILE}.tmp" "${ONBOARD_FILE}"
+    systemctl restart mdatp.service
+    wait_for_daemon || { log "The Defender daemon does not respond after onboarding."; exit 1; }
+  fi
+fi
+
+# Settings Defender's own policy manages show " [managed]" and can't be
+# changed locally; this only fixes a locally disabled real-time protection.
+if [[ "$(field real_time_protection_enabled)" != true ]]; then
+  log "Real-time protection is off; enabling it."
+  "${MDATP}" config real-time-protection --value enabled
+fi
+
+if [[ "$(field definitions_status)" != up_to_date ]]; then
+  log "Definitions are not up to date; updating them."
+  "${MDATP}" definitions update
+fi
+
+healthy="$(field healthy)"
+log "healthy=${healthy} licensed=$(field licensed) org_id=$(field org_id) rtp=$(field real_time_protection_enabled) definitions=$(field definitions_status)"
+[[ "${healthy}" == true ]]

images/fedora-intune/manifest.yaml

@@ -27,7 +27,7 @@ opt-usrlocal: root
 
 repos:
   - himmelblau
-  - microsoft-rhel10
+  - microsoft-fedora44
   - microsoft-edge
 
 include:

images/fedora-intune/repos/microsoft.repo

@@ -1,9 +1,13 @@
 # packages.microsoft.com, limited with includepkgs to the packages the image
-# uses, so nothing else from the RHEL repo can replace a Fedora package.
+# uses, so nothing else from the Microsoft repo can replace a Fedora package.
+#
+# Fedora 44 build of Defender (mdatp): Fedora is a supported Defender
+# distribution, servers and desktops. Pinned to 44 rather than $releasever so a
+# new Fedora release doesn't fail the build before Microsoft publishes its repo.
 
-[microsoft-rhel10]
-name=Microsoft Production (RHEL 10)
-baseurl=https://packages.microsoft.com/rhel/10/prod/
+[microsoft-fedora44]
+name=Microsoft Production (Fedora 44)
+baseurl=https://packages.microsoft.com/fedora/44/prod/
 enabled=1
 gpgcheck=1
 repo_gpgcheck=1