fedora-intune: fix boot issues, add Himmelblau variant

Fixes found by building and inspecting the image:

- Select the Intune authselect profile with-altfiles. Without it system
  users in /usr/lib/passwd (gdm, pipewire, mdatp) do not resolve and the
  login screen never starts. The build now fails if gdm does not resolve.
- Ship /opt as a plain directory (opt-usrlocal: root). Defender installs
  to /opt/microsoft/mdatp and keeps state in /var/opt/microsoft/mdatp;
  with the default /opt -> /var/opt symlink those were the same
  read-only directory. rpm-ostree still relocates /opt content to
  /usr/lib/opt, so finalize.d/60-opt-links links it back (only for images
  where /opt is a directory; fedora-cosmic/remote are unaffected).
- Run Defender's %post on first boot (mdatp-firstboot.service): in a
  compose /var is read-only and the machine GUID/state must not be
  shared. mdatp.service waits for it.

New image fedora-intune-himmelblau: the same workstation with Entra ID
sign-in through Himmelblau (Community Nightly packages), which joins the
device at the first sign-in and enrolls it in Intune (apply_policy)
instead of the Microsoft Intune app. Workstation, Edge and Defender
manifests move to images/shared so both images use them; build.sh copies
images/shared/*.yaml and CI builds both images in one matrix job.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

images/fedora-intune-himmelblau/build.conf

@@ -0,0 +1,10 @@
+# Build configuration for images/fedora-intune-himmelblau. Sourced by build.sh.
+
+BUILD_MODE=upstream
+
+UPSTREAM_REPO="https://gitlab.com/fedora/ostree/ci-test.git"
+
+# Stable only, like fedora-intune.
+declare -A UPSTREAM_REFS=(
+  [44]=f44
+)

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

@@ -0,0 +1,3 @@
+# Intune compliance check at login and on a timer, for every user.
+enable himmelblau-compliance-check.service
+enable himmelblau-compliance-check.timer

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

@@ -0,0 +1,4 @@
+# Himmelblau daemons; they pull in their sockets with Requires=.
+enable himmelblaud.service
+enable himmelblaud-tasks.service
+enable himmelblau-hsm-pin-init.service

images/fedora-intune-himmelblau/files/himmelblau.conf

@@ -0,0 +1,17 @@
+# Himmelblau configuration. See himmelblau.conf(5) and
+# https://himmelblau-idm.org/docs/reference/himmelblau-conf/
+#
+# No tenant settings are needed: `domain` defaults to the domain of the first
+# user who signs in, and that user joins the device to Entra ID. Restrict who
+# may sign in with pam_allow_groups (group object IDs or UPNs).
+
+[global]
+# Enroll the device in Intune and apply/report compliance policies.
+apply_policy = true
+# Fedora's admin group; members of sudo_groups (Entra group object IDs) are
+# added to it.
+local_sudo_group = wheel
+# Home directories named after the account (e.g. /home/jdoe), with a UPN alias.
+home_attr = CN
+home_alias = SPN
+use_etc_skel = true

images/fedora-intune-himmelblau/himmelblau.yaml

@@ -0,0 +1,68 @@
+# Himmelblau: Entra ID sign-in (PAM/NSS), Entra join, Hello PIN, Intune
+# enrollment and compliance, and browser SSO.
+
+repo-packages:
+  - repo: himmelblau
+    packages:
+      - himmelblau
+      - pam-himmelblau
+      - nss-himmelblau
+      - himmelblau-selinux
+      # Shows a QR code on the login screen for the MFA/device-code prompts.
+      - himmelblau-qr-greeter
+      # Entra SSO in Edge (native messaging host) via the Himmelblau broker.
+      - himmelblau-broker
+      - himmelblau-sso
+
+packages:
+  - authselect
+  - nss-altfiles
+  # himmelblau-selinux compiles its policy module at install time.
+  - make
+  - selinux-policy-devel
+
+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"]
+
+postprocess:
+  # The package's %post selects its authselect vendor profile but drops
+  # with-altfiles; without it system users (gdm, pipewire, mdatp, ...) in
+  # /usr/lib/passwd do not resolve and the login screen never starts.
+  - |
+    #!/usr/bin/env bash
+    set -xeuo pipefail
+    authselect select himmelblau with-altfiles with-pam-gnome-keyring --force --nobackup
+    for user in gdm mdatp; do
+      getent passwd "${user}" >/dev/null
+    done
+    grep -q pam_himmelblau.so /etc/pam.d/system-auth
+
+  # himmelblau-selinux builds and loads its module in %posttrans, which does
+  # nothing in a compose; do it here.
+  - |
+    #!/usr/bin/env bash
+    set -xeuo pipefail
+    tmp="$(mktemp -d)"
+    cp /usr/share/selinux/packages/himmelblaud/himmelblaud.{te,if,fc} "${tmp}/"
+    make -C "${tmp}" -f /usr/share/selinux/devel/Makefile himmelblaud.pp
+    semodule -n -i "${tmp}/himmelblaud.pp"
+    rm -rf "${tmp}"
+
+  # Show the QR greeter on the GDM login screen, not only in user sessions.
+  - |
+    #!/usr/bin/env bash
+    set -xeuo pipefail
+    install -d /etc/dconf/db/gdm.d
+    cat > /etc/dconf/db/gdm.d/01-himmelblau-qr-greeter <<'CONF'
+    [org/gnome/shell]
+    enabled-extensions=['qr-greeter@himmelblau-idm.org']
+    CONF
+    dconf update
+
+  # Compliance check (user timer) and broker for every user.
+  - |
+    #!/usr/bin/env bash
+    set -xeuo pipefail
+    systemctl --user --global preset-all

images/fedora-intune-himmelblau/manifest.yaml

@@ -0,0 +1,37 @@
+# Minimal GNOME workstation where users sign in with their Entra ID account
+# (Himmelblau), with Microsoft Edge and Microsoft Defender for Endpoint.
+# Himmelblau joins the device to Entra ID at the first sign-in and, with
+# apply_policy, enrolls it in Intune and reports compliance itself, so the
+# Microsoft Intune app (fedora-intune) is not included.
+
+metadata:
+  summary: Fedora minimal GNOME workstation with Entra ID sign-in (Himmelblau)
+
+variables:
+  # Opt out of the upstream fedora.yaml so we don't pull the Firefox RPM.
+  distro: "fedora-intune-himmelblau"
+  variant: "intune-himmelblau"
+
+# Keep it small: no weak/optional dependencies.
+recommends: false
+
+default_target: graphical.target
+
+ref: fedora-intune-himmelblau/${releasever_ref}/${basearch}/intune-himmelblau
+
+# /opt as a plain directory; see fedora-intune/manifest.yaml.
+opt-usrlocal: root
+
+repos:
+  - himmelblau
+  - microsoft-rhel10
+  - microsoft-edge
+
+include:
+  - base-atomic.yaml
+  # Shared with fedora-intune (images/shared).
+  - workstation.yaml
+  - microsoft-edge.yaml
+  - defender.yaml
+  # Entra ID sign-in and Intune.
+  - himmelblau.yaml

images/fedora-intune-himmelblau/repos/himmelblau.repo

@@ -0,0 +1,9 @@
+# Himmelblau Community Nightly packages (free development builds). The
+# maintained Stable repositories need a subscription entitlement token:
+# https://himmelblau-idm.org/stable-repositories/
+[himmelblau]
+name=Himmelblau Community Nightly (Fedora 44)
+baseurl=https://packages.himmelblau-idm.org/nightly/latest/rpm/fedora44
+enabled=1
+gpgcheck=1
+gpgkey=https://packages.himmelblau-idm.org/himmelblau.asc

images/fedora-intune/defender.yaml

@@ -1,39 +0,0 @@
-# Microsoft Defender for Endpoint on Linux (mdatp), RHEL 10 build.
-#
-# mdatp's %post does the real install: it writes mdatp.service and the
-# mde_netfilter_v2 units, loads its SELinux module and creates a machine GUID
-# and state under /var/opt/microsoft/mdatp. In a compose the daemon cannot
-# start and /var is not shipped, so the units and SELinux module are handled
-# here and the per-machine state is left to the first start on the device.
-#
-# Onboarding is per tenant and not part of the image: run the onboarding script
-# from the Defender portal on the device (see the Intune test doc).
-
-repo-packages:
-  - repo: microsoft-rhel10
-    packages:
-      - mdatp
-
-packages:
-  # Used by the Defender TVM/inventory scripts and the onboarding script.
-  - python3
-
-add-files:
-  - ["50-defender.preset", "/usr/lib/systemd/system-preset/50-defender.preset"]
-
-postprocess:
-  - |
-    #!/usr/bin/env bash
-    set -xeuo pipefail
-    conf=/opt/microsoft/mdatp/conf
-    # Units the %post copies into place; install them if it did not get there.
-    for unit in mdatp.service mde_netfilter_v2.service mde_netfilter_v2.socket; do
-      if [[ ! -f "/usr/lib/systemd/system/${unit}" ]]; then
-        install -m 0644 "${conf}/${unit}" "/usr/lib/systemd/system/${unit}"
-      fi
-    done
-    semodule -n -i "${conf}/selinux_policies/out/mdatp_service.pp"
-    # Never ship a machine GUID or onboarding state baked in at build time.
-    ls -laR /etc/opt/microsoft /var/opt/microsoft 2>/dev/null || true
-    rm -rf /var/opt/microsoft/mdatp
-    rm -f /etc/opt/microsoft/mdatp/mdatp_onboard.json

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

@@ -1,3 +0,0 @@
-# Defender daemon and its network filter (socket-activated).
-enable mdatp.service
-enable mde_netfilter_v2.socket

images/fedora-intune/intune.yaml

@@ -1,23 +1,14 @@
-# Microsoft Intune app for Linux (intune-portal), the Microsoft identity broker
-# and Microsoft Edge (needed for Conditional Access to Microsoft 365 web apps).
+# Microsoft Intune app for Linux (intune-portal) and the Microsoft identity
+# broker, from the microsoft-rhel10 repo (shared/repos/microsoft.repo).
 #
 # Fedora is not a supported Intune distribution. The RHEL 10 builds are used
-# because they link against the same library generation as Fedora 44. The
-# repos are limited to these packages with includepkgs (repos/microsoft.repo),
-# so nothing else from the RHEL repo can replace a Fedora package.
-
-repos:
-  - microsoft-rhel10
-  - microsoft-edge
+# because they link against the same library generation as Fedora 44.
 
 repo-packages:
   - repo: microsoft-rhel10
     packages:
       - intune-portal
       - microsoft-identity-broker
-  - repo: microsoft-edge
-    packages:
-      - microsoft-edge-stable
 
 packages:
   # intune-portal scriptlet dependencies (authselect profile + SELinux module)
@@ -26,6 +17,7 @@ packages:
   - checkpolicy
   - policycoreutils
   - sssd-client
+  - nss-altfiles
   # Secret storage for the identity broker tokens.
   - gnome-keyring
   - libsecret
@@ -57,7 +49,10 @@ postprocess:
         -e '/^session[[:space:]]\+required[[:space:]]\+pam_unix.so/a session     optional                                     pam_intune.so' \
         "${profile}/${f}"
     done
-    authselect select custom/intune-profile --force --nobackup
+    # with-altfiles: system users (gdm, pipewire, mdatp, ...) live in
+    # /usr/lib/passwd on rpm-ostree systems, not in /etc/passwd as on RHEL.
+    authselect select custom/intune-profile with-altfiles --force --nobackup
+    getent passwd gdm >/dev/null
 
   - |
     #!/usr/bin/env bash

images/fedora-intune/manifest.yaml

@@ -18,8 +18,21 @@ default_target: graphical.target
 
 ref: fedora-intune/${releasever_ref}/${basearch}/intune
 
+# Ship /opt as a plain read-only directory instead of a symlink to /var/opt.
+# Defender installs to /opt/microsoft/mdatp and keeps its state in
+# /var/opt/microsoft/mdatp; with the default symlink those are the same,
+# read-only directory. Needs composefs, which upstream enables.
+opt-usrlocal: root
+
+repos:
+  - microsoft-rhel10
+  - microsoft-edge
+
 include:
   - base-atomic.yaml
-  - custom.yaml
-  - intune.yaml
+  # Shared with fedora-intune-himmelblau (images/shared).
+  - workstation.yaml
+  - microsoft-edge.yaml
   - defender.yaml
+  # Microsoft Intune app.
+  - intune.yaml

images/shared/defender.yaml

@@ -0,0 +1,46 @@
+# Microsoft Defender for Endpoint on Linux (mdatp), RHEL 10 build, from the
+# microsoft-rhel10 repo (shared/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,
+# logs). In a compose /var is read-only, and that state must not be shared
+# between machines anyway, so the %post is saved into the image and run once on
+# first boot by mdatp-firstboot.service. mdatp.service waits for it.
+#
+# Onboarding is per tenant and not part of the image: run the onboarding script
+# from the Defender portal on the device.
+
+repo-packages:
+  - repo: microsoft-rhel10
+    packages:
+      - mdatp
+
+packages:
+  # The %post is a bash script; Defender's inventory scripts and the
+  # onboarding script are Python.
+  - bash
+  - python3
+
+add-files:
+  - ["mdatp-firstboot", "/usr/libexec/mdatp-firstboot"]
+  - ["mdatp-firstboot.service", "/usr/lib/systemd/system/mdatp-firstboot.service"]
+  - ["mdatp-firstboot.conf", "/usr/lib/systemd/system/mdatp.service.d/10-firstboot.conf"]
+  - ["50-defender.preset", "/usr/lib/systemd/system-preset/50-defender.preset"]
+
+postprocess:
+  - |
+    #!/usr/bin/env bash
+    set -xeuo pipefail
+    # The %post wrote the units during the compose; fail the build if a newer
+    # mdatp stops doing that, rather than shipping a Defender that never starts.
+    for unit in mdatp.service mde_netfilter_v2.service mde_netfilter_v2.socket; do
+      test -f "/usr/lib/systemd/system/${unit}"
+    done
+    # rpm-ostree keeps /opt content in /usr/lib/opt until the commit.
+    for root in /usr/lib/opt /opt; do
+      pp="${root}/microsoft/mdatp/conf/selinux_policies/out/mdatp_service.pp"
+      [[ -f "${pp}" ]] && break
+    done
+    semodule -n -i "${pp}"
+    rpm -q --qf '%{POSTIN}' mdatp > /usr/libexec/mdatp-postinst
+    chmod 0755 /usr/libexec/mdatp-firstboot /usr/libexec/mdatp-postinst

images/shared/files/50-defender.preset

@@ -0,0 +1,4 @@
+# Defender: first-boot setup, the daemon and its network filter.
+enable mdatp-firstboot.service
+enable mdatp.service
+enable mde_netfilter_v2.socket

images/shared/files/finalize.d/60-opt-links

@@ -0,0 +1,20 @@
+#!/bin/bash
+# Runs in the target root during `rpm-ostree compose image` (edition 2024
+# finalize.d hook). rpm-ostree relocates RPM content under /opt to
+# /usr/lib/opt. With `opt-usrlocal: root` /opt is a plain directory in the
+# image and nothing links it back, so link each vendor directory. Images on the
+# default (/opt -> /var/opt, linked by tmpfiles.d) are left alone.
+set -euo pipefail
+
+root="${PWD}"
+
+[[ -d "${root}/usr/lib/opt" ]] || exit 0
+if [[ -L "${root}/opt" || ! -d "${root}/opt" ]]; then
+  exit 0
+fi
+
+for dir in "${root}"/usr/lib/opt/*; do
+  name="$(basename "${dir}")"
+  ln -sfn "../usr/lib/opt/${name}" "${root}/opt/${name}"
+  echo "Linked /opt/${name} -> /usr/lib/opt/${name}"
+done

images/shared/files/mdatp-firstboot

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Finish the Defender (mdatp) install on first boot by running the package's
+# own %post, saved at build time: it creates the machine GUID, state, logs and
+# definitions database under /var and then enables and starts mdatp.service.
+set -euo pipefail
+
+MARKER=/var/lib/mdatp-firstboot.done
+
+[[ -f "${MARKER}" ]] && exit 0
+
+# mdatp.service only starts once the marker exists (10-firstboot.conf), and the
+# %post starts it, so create the marker first and drop it again on failure.
+touch "${MARKER}"
+if ! bash /usr/libexec/mdatp-postinst 1; then
+  rm -f "${MARKER}"
+  exit 1
+fi

images/shared/files/mdatp-firstboot.conf

@@ -0,0 +1,3 @@
+# Don't start Defender before mdatp-firstboot.service has created its state.
+[Unit]
+ConditionPathExists=/var/lib/mdatp-firstboot.done

images/shared/files/mdatp-firstboot.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Finish the Microsoft Defender for Endpoint install on first boot
+Documentation=https://learn.microsoft.com/en-us/defender-endpoint/microsoft-defender-endpoint-linux
+After=network-online.target
+Wants=network-online.target
+ConditionPathExists=!/var/lib/mdatp-firstboot.done
+
+[Service]
+Type=oneshot
+ExecStart=/usr/libexec/mdatp-firstboot
+RemainAfterExit=yes
+TimeoutStartSec=15min
+
+[Install]
+WantedBy=multi-user.target

images/shared/microsoft-edge.yaml

@@ -0,0 +1,7 @@
+# Microsoft Edge, from the microsoft-edge repo (shared/repos/microsoft.repo).
+# Conditional Access to Microsoft 365 web apps on Linux requires Edge.
+
+repo-packages:
+  - repo: microsoft-edge
+    packages:
+      - microsoft-edge-stable

images/shared/repos/microsoft.repo

@@ -1,3 +1,6 @@
+# packages.microsoft.com, limited with includepkgs to the packages the images
+# use, so nothing else from the RHEL repo can replace a Fedora package.
+
 [microsoft-rhel10]
 name=Microsoft Production (RHEL 10)
 baseurl=https://packages.microsoft.com/rhel/10/prod/

images/shared/workstation.yaml

@@ -1,4 +1,5 @@
-# Minimal GNOME workstation.
+# Minimal GNOME workstation, shared by the fedora-intune images. Include it
+# from a manifest that sets `opt-usrlocal: root` (finalize.d/60-opt-links).
 
 packages:
   # Fedora integration normally provided by the upstream fedora.yaml (which we
@@ -45,7 +46,7 @@ exclude-packages:
 add-files:
   - ["50-workstation.preset", "/usr/lib/systemd/system-preset/50-workstation.preset"]
   # Key-only SSH for local accounts.
-  - ["10-intune-sshd.conf", "/etc/ssh/sshd_config.d/10-intune-sshd.conf"]
+  - ["10-workstation-sshd.conf", "/etc/ssh/sshd_config.d/10-workstation-sshd.conf"]
 
 postprocess:
   # uresourced breaks the GDM greeter's user manager; see fedora-remote.