dracut: adopt CoreOS specific modules from Ignition-Dracut

With the merging of Ignition-Dracut into Ignition starting with version
2.5.0, we are moving the 99* and 30ignition CoreOS specific modules here.

Signed-off-by: Ben Howard <ben.howard@redhat.com>

overlay.d/05core/usr/lib/dracut/modules.d/30ignition-coreos/coreos-diskful-generator

@@ -0,0 +1,57 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+# Originally this was known as 'ignition-generator' found in ignition-dracut.
+# With Ignition v 2.5.0, ignition-dracut was merged into Ignition and the CoreOS
+# specific bits were deposited here.
+
+set -e
+
+# Generators don't have logging right now
+# https://github.com/systemd/systemd/issues/15638
+exec 1>/dev/kmsg; exec 2>&1
+
+UNIT_DIR="${1:-/tmp}"
+
+cmdline=( $(</proc/cmdline) )
+cmdline_arg() {
+    local name="$1" value="$2"
+    for arg in "${cmdline[@]}"; do
+        if [[ "${arg%%=*}" == "${name}" ]]; then
+            value="${arg#*=}"
+        fi
+    done
+    echo "${value}"
+}
+
+cmdline_bool() {
+    local value=$(cmdline_arg "$@")
+    case "$value" in
+        ""|0|no|off) return 1;;
+        *) return 0;;
+    esac
+}
+
+add_requires() {
+    local name="$1"; shift
+    local target="$1"; shift
+    local requires_dir="${UNIT_DIR}/${target}.requires"
+    mkdir -p "${requires_dir}"
+    ln -sf "../${name}" "${requires_dir}/${name}"
+}
+
+if ! $(cmdline_bool 'ignition.firstboot' 0); then
+    exit 0
+fi
+
+if ! command -v is-live-image >/dev/null || ! is-live-image; then
+    # ignition-setup-user.service should depend on the boot device node
+    # only on diskful boots
+    mkdir -p "${UNIT_DIR}/ignition-setup-user.service.d"
+    cat > "${UNIT_DIR}/ignition-setup-user.service.d/diskful-gpt.conf" <<EOF
+[Unit]
+Requires=coreos-gpt-setup.service
+After=coreos-gpt-setup.service
+EOF
+fi

overlay.d/05core/usr/lib/dracut/modules.d/30ignition-coreos/coreos-gpt-setup.service

@@ -0,0 +1,33 @@
+[Unit]
+Description=Generate new UUID for boot disk GPT
+ConditionPathExists=/etc/initrd-release
+DefaultDependencies=no
+Before=local-fs-pre.target systemd-fsck-root.service
+Before=ignition-diskful.target
+Wants=systemd-udevd.service
+After=systemd-udevd.service
+
+# This unit must the first to run when the disk holding the root partition
+# becomes available. To avoid relying on the name of the root partition which
+# is different between RHCOS LUKS setup and current FCOS setup, we wait for the
+# partition labeled 'boot' to become available. This is reliable as we don't
+# have any plan to support re-provisioning/re-writing the /boot partition,
+#
+# This is the only unit where it is safe to wait only on a specific disk label
+# as this will call udevadm settle after the GPT setup. Units that requires the
+# boot and root partitions to be available should order themselves after this
+# unit.
+Requires=dev-disk-by\x2dlabel-boot.device
+After=dev-disk-by\x2dlabel-boot.device
+
+# Run before services that use device nodes, preventing them from racing
+# with udev activity generated by sgdisk
+Before=ignition-setup-base.service ignition-setup-user.service ignition-disks.service
+
+OnFailure=emergency.target
+OnFailureJobMode=isolate
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/sbin/coreos-gpt-setup /dev/disk/by-label/boot

overlay.d/05core/usr/lib/dracut/modules.d/30ignition-coreos/coreos-gpt-setup.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# randomizes the disk guid on the disk containing the partition specified by $1
+# and moves the secondary gpt header/partition table to the end of the disk where it
+# should be. If the disk guid is already randomized, it does nothing.
+set -euo pipefail
+
+UNINITIALIZED_GUID='00000000-0000-4000-a000-000000000001'
+
+# On RHEL 8 the version of lsblk doesn't have PTUUID. Let's detect
+# if lsblk supports it. In the future we can remove the 'if' and
+# just use the 'else'.
+if ! lsblk --help | grep -q PTUUID; then
+    # Get the PKNAME
+    eval $(lsblk --output PKNAME --pairs --paths --nodeps "$1")
+    # Get the PTUUID
+    eval $(blkid -o export $PKNAME)
+else
+    # PTUUID is the disk guid, PKNAME is the parent kernel name
+    eval $(lsblk --output PTUUID,PKNAME --pairs --paths --nodeps "$1")
+fi
+
+[ "$PTUUID" != "$UNINITIALIZED_GUID" ] && exit 0
+
+sgdisk --disk-guid=R --move-second-header "$PKNAME"
+udevadm settle

overlay.d/05core/usr/lib/dracut/modules.d/30ignition-coreos/coreos-teardown-initramfs.service

@@ -0,0 +1,38 @@
+# Clean up the initramfs networking on first boot
+# so the real network is being brought up
+# https://github.com/coreos/fedora-coreos-tracker/issues/394#issuecomment-599721763
+
+[Unit]
+Description=CoreOS Tear down initramfs
+DefaultDependencies=false
+
+# We want to run the teardown after all other Ignition stages
+# have run because some platforms (like Packet) do remote status
+# reporting for each Ignition stage. Since we are tearing down
+# the networking using an ExecStop we need to make sure we run
+# the ExecStop *after* any other ignition*.service unit's ExecStop.
+# The only other one right now is ignition-mount that has an ExecStop
+# for doing an unmount. Since the ordering for ExecStop is the
+# opposite of ExecStart we need to use `Before=ignition-mount.service`.
+# https://github.com/coreos/fedora-coreos-tracker/issues/440
+Before=ignition-mount.service
+Before=ignition-complete.target
+
+# Make sure ExecStop= runs before we switch root
+Conflicts=initrd-switch-root.target umount.target
+Before=initrd-switch-root.target
+
+OnFailure=emergency.target
+OnFailureJobMode=isolate
+
+# If we are already heading towards emergency.target
+# then don't try to stop this unit because it will fail
+# when trying to access files in /sysroot/etc/. The failure
+# is mostly harmless but having the extra error messages
+# leads us away from the original problem.
+IgnoreOnIsolate=true
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStop=/usr/sbin/coreos-teardown-initramfs

overlay.d/05core/usr/lib/dracut/modules.d/30ignition-coreos/coreos-teardown-initramfs.sh

@@ -0,0 +1,187 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+set -euo pipefail
+
+# Load dracut libraries. Using getargbool() and getargs() from
+# dracut-lib and ip_to_var() from net-lib
+load_dracut_libs() {
+    # dracut is not friendly to set -eu
+    set +euo pipefail
+    type getargbool &>/dev/null || . /lib/dracut-lib.sh
+    type ip_to_var &>/dev/null  || . /lib/net-lib.sh
+    set -euo pipefail
+}
+
+dracut_func() {
+    # dracut is not friendly to set -eu
+    set +euo pipefail
+    "$@"; local rc=$?
+    set -euo pipefail
+    return $rc
+}
+
+selinux_relabel() {
+    # If we have access to coreos-relabel then let's use that because
+    # it allows us to set labels on things before switching root
+    # If not, fallback to tmpfiles.
+    if command -v coreos-relabel; then
+        coreos-relabel $1
+    else
+        echo "Z $1 - - -" >> "/run/tmpfiles.d/$(basename $0)-relabel.conf"
+    fi
+}
+
+# Propagate initramfs networking if desired. The policy here is:
+#
+#    - If a networking configuration was provided before this point
+#      (most likely via Ignition) and exists in the real root then
+#      we do nothing and don't propagate any initramfs networking.
+#    - If a user did not provide any networking configuration
+#      then we'll propagate the initramfs networking configuration
+#      into the real root.
+#
+# See https://github.com/coreos/fedora-coreos-tracker/issues/394#issuecomment-599721173
+propagate_initramfs_networking() {
+    # Check the two locations where a user could have provided network configuration
+    # On FCOS we only support keyfiles, but on RHCOS we support keyfiles and ifcfg
+    if [ -n "$(ls -A /sysroot/etc/NetworkManager/system-connections/)" -o \
+         -n "$(ls -A /sysroot/etc/sysconfig/network-scripts/)" ]; then
+        echo "info: networking config is defined in the real root"
+        echo "info: will not attempt to propagate initramfs networking"
+    else
+        echo "info: no networking config is defined in the real root"
+        if [ -n "$(ls -A /run/NetworkManager/system-connections/)" ]; then
+            echo "info: propagating initramfs networking config to the real root"
+            cp /run/NetworkManager/system-connections/* /sysroot/etc/NetworkManager/system-connections/
+            selinux_relabel /etc/NetworkManager/system-connections/
+        else
+            echo "info: no initramfs networking information to propagate"
+        fi
+    fi
+}
+
+# Propagate the ip= karg hostname if desired. The policy here is:
+#
+#     - IF a hostname is specified in static networking ip= kargs
+#     - AND no hostname was set via Ignition (realroot `/etc/hostname`)
+#     - THEN we make the last hostname specified in an ip= karg apply
+#       permanently by writing it into `/etc/hostname`
+#
+# This may no longer be needed when the following bug is fixed:
+# https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/419
+propagate_initramfs_hostname() {
+    if [ -e '/sysroot/etc/hostname' ]; then
+        echo "info: hostname is defined in the real root"
+        echo "info: will not attempt to propagate initramfs hostname"
+        return 0
+    fi
+    # Detect if any hostname was provided via static ip= kargs
+    # run in a subshell so we don't pollute our environment
+    hostnamefile=$(mktemp)
+    (
+        last_nonempty_hostname=''
+        # Inspired from ifup.sh from the 40network dracut module. Note that
+        # $hostname from ip_to_var will only be nonempty for static networking.
+        for iparg in $(dracut_func getargs ip=); do
+            dracut_func ip_to_var $iparg
+            [ -n "${hostname:-}" ] && last_nonempty_hostname="$hostname"
+        done
+        echo -n "$last_nonempty_hostname" > $hostnamefile
+    )
+    hostname=$(<$hostnamefile); rm $hostnamefile
+    if [ -n "$hostname" ]; then
+        echo "info: propagating initramfs hostname (${hostname}) to the real root"
+        echo $hostname > /sysroot/etc/hostname
+        selinux_relabel /etc/hostname
+    else
+        echo "info: no initramfs hostname information to propagate"
+    fi
+}
+
+# Persist automatic multipath configuration, if any.
+# When booting with `rd.multipath=default`, the default multipath
+# configuration is written. We need to ensure that the mutlipath configuration
+# is persisted to the final target.
+propagate_initramfs_multipath() {
+    if [ ! -f /sysroot/etc/multipath.conf ] && [ -f /etc/multipath.conf ]; then
+        echo "info: propagating automatic multipath configuration"
+        cp -v /etc/multipath.conf /sysroot/etc/
+        mkdir -p /sysroot/etc/multipath/multipath.conf.d
+        selinux_relabel /etc/multipath.conf
+        selinux_relabel /etc/multipath/multipath.conf.d
+    else
+        echo "info: no initramfs automatic multipath configuration to propagate"
+    fi
+}
+
+down_interface() {
+    echo "info: taking down network device: $1"
+    # On recommendation from the NM team let's try to delete the device
+    # first and if that doesn't work then set it to down and flush any
+    # associated addresses. Deleting virtual devices (bonds, teams, bridges,
+    # ip-tunnels, etc) will clean up any associated kernel resources. A real
+    # device can't be deleted so that will fail and we'll fallback to setting
+    # it down and flushing addresses.
+    if ! ip link delete $1; then
+        ip link set $1 down
+        ip addr flush dev $1
+    fi
+}
+
+# Iterate through the interfaces in the machine and take them down.
+# Note that in the futre we would like to possibly use `nmcli` networking off`
+# for this. See the following two comments for details:
+# https://github.com/coreos/fedora-coreos-tracker/issues/394#issuecomment-599721763
+# https://github.com/coreos/fedora-coreos-tracker/issues/394#issuecomment-599746049
+down_interfaces() {
+    if ! [ -z "$(ls /sys/class/net)" ]; then
+        for f in /sys/class/net/*; do
+            interface=$(basename "$f")
+            # The `bonding_masters` entry is not a true interface and thus
+            # cannot be taken down. Also skip local loopback
+            case "$interface" in
+                "lo" | "bonding_masters")
+                    continue
+                    ;;
+            esac
+            down_interface $interface
+        done
+    fi
+}
+
+main() {
+    # Load libraries from dracut
+    load_dracut_libs
+
+    # Take down all interfaces set up in the initramfs
+    down_interfaces
+
+    # Clean up all routing
+    echo "info: flushing all routing"
+    ip route flush table main
+    ip route flush cache
+
+    # Hopefully our logic is sound enough that this is never needed, but
+    # user's can explicitly disable initramfs network/hostname propagation
+    # with the coreos.no_persist_ip karg.
+    if dracut_func getargbool 0 'coreos.no_persist_ip'; then
+        echo "info: coreos.no_persist_ip karg detected"
+        echo "info: skipping propagating initramfs settings"
+    else
+        propagate_initramfs_hostname
+        propagate_initramfs_networking
+    fi
+
+    # Now that the configuration has been propagated (or not)
+    # clean it up so that no information from outside of the
+    # real root is passed on to NetworkManager in the real root
+    rm -rf /run/NetworkManager/
+
+    # If automated multipath configuration has been enabled, ensure
+    # that its propagated to the real rootfs.
+    propagate_initramfs_multipath
+}
+
+main

overlay.d/05core/usr/lib/dracut/modules.d/30ignition-coreos/module-setup.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+depends() {
+    echo systemd network ignition
+}
+
+install_ignition_unit() {
+    local unit="$1"; shift
+    local target="${1:-ignition-complete.target}"; shift
+    local instantiated="${1:-$unit}"; shift
+    inst_simple "$moddir/$unit" "$systemdsystemunitdir/$unit"
+    mkdir -p "$initdir/$systemdsystemunitdir/$target.requires"
+    ln_r "../$unit" "$systemdsystemunitdir/$target.requires/$instantiated"
+}
+
+install() {
+    inst_multiple \
+        basename \
+        lsblk \
+        sgdisk
+
+    inst_simple "$moddir/coreos-diskful-generator" \
+        "$systemdutildir/system-generators/coreos-diskful-generator"
+
+    inst_script "$moddir/coreos-gpt-setup.sh" \
+        "/usr/sbin/coreos-gpt-setup"
+
+    # For consistency tear down the network and persist multipath between the initramfs and
+    # real root. See https://github.com/coreos/fedora-coreos-tracker/issues/394#issuecomment-599721763
+    inst_script "$moddir/coreos-teardown-initramfs.sh" \
+        "/usr/sbin/coreos-teardown-initramfs"
+    install_ignition_unit coreos-teardown-initramfs.service
+
+    # units only started when we have a boot disk
+    # path generated by systemd-escape --path /dev/disk/by-label/root
+    install_ignition_unit coreos-gpt-setup.service ignition-diskful.target
+}

overlay.d/05core/usr/lib/dracut/modules.d/99emergency-timeout/ignition-virtio-dump-journal.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Dump journal to virtio port
+ConditionPathExists=/etc/initrd-release
+DefaultDependencies=false
+ConditionVirtualization=|kvm
+ConditionVirtualization=|qemu
+After=basic.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+EnvironmentFile=/run/ignition.env
+ExecStart=/usr/bin/ignition-virtio-dump-journal