moved all dracut modules to modules.d/ + support

1 files changed, 163 insertions, 0 deletions

diff --git a/builder/modules.d/dnbd3-rootfs/hooks/prepare-root-partition.sh b/builder/modules.d/dnbd3-rootfs/hooks/prepare-root-partition.sh
new file mode 100755
index 00000000..3e93253f
--- /dev/null
+++ b/builder/modules.d/dnbd3-rootfs/hooks/prepare-root-partition.sh
@@ -0,0 +1,163 @@
+#!/usr/bin/env bash
+# region imports
+source '/usr/lib/rebash/core.sh'
+core.import '/usr/lib/openslx/tools.sh'
+core.import exceptions
+core.import utils
+core.import logging
+type emergency_shell >/dev/null 2>&1 || source /lib/dracut-lib.sh
+# endregion
+exceptions.try
+{
+source /etc/openslx
+logging.set_commands_level debug
+logging.set_level debug
+[[ "$SLX_LOG_FILE_PATH" == "" ]] && SLX_LOG_FILE_PATH=/var/log/openslx
+logging.set_log_file "$SLX_LOG_FILE_PATH"
+
+# region find writable partition
+if [[ "$SLX_WRITABLE_DEVICE_IDENTIFIER" != '' ]] &&
+    ! persistent_device="$(
+        tools.find_block_device "$SLX_WRITABLE_DEVICE_IDENTIFIER" '' \
+        "$SLX_WRITABLE_DEVICE_IDENTIFIER_TIMEOUT_IN_SECONDS"
+    )"
+then
+    logging.warn "Failed to find unique device with identifier" \
+        "\"${SLX_WRITABLE_DEVICE_IDENTIFIER}\"; matched devices:" \
+        "\"${persistent_device}\""
+fi
+if [ -n "$SLX_WRITABLE_DEVICE_STORAGE_FILE_PATH" ] && [ -n "$persistent_device" ]
+then
+    persistent_mountpoint=/mnt/slx_writable_device
+    storage_file_path="${persistent_mountpoint}/$SLX_WRITABLE_DEVICE_STORAGE_FILE_PATH"
+    ! mkdir --parents "$(dirname "$storage_file_path")"
+    if ! mount --type auto "$persistent_device" "$persistent_mountpoint"; then
+        logging.warn "Failed to mount $persistent_device, checking filesystem."
+        ! $SLX_WRITABLE_DEVICE_STORAGE_FILESYSTEM_CHECK_COMMAND \
+            "$persistent_device"
+        if ! mount --type auto "$persistent_device" "$persistent_mountpoint"
+        then
+            logging.warn "Mounting $persistent_device, still failing," \
+                "creating new filesystem on device"
+            $SLX_WRITABLE_DEVICE_STORAGE_FILESYSTEM_CREATE_COMMAND \
+                "$persistent_device"
+        fi
+        if ! mount --type auto "$persistent_device" "$persistent_mountpoint"
+        then
+            logging.warn "Mounting $persistent_device, still failing," \
+                "giving up, and using ramdisk"
+            persistent_device=""
+        fi
+    fi
+    if [ -n "$persistent_device" ]; then
+        if [ ! -e "$storage_file_path" ]; then
+            # Create a sparse file.
+            dd of="$storage_file_path" bs=1M \
+                seek="$SLX_WRITABLE_DEVICE_STORAGE_MAXIMUM_FILE_SIZE_IN_MB" count=0
+        fi
+        persistent_device="$(losetup --find)"
+        losetup "$persistent_device" "$storage_file_path"
+    fi
+fi
+
+# "P" for persistent storage, "N" for not persistent (affects dmsetup call,
+# see scripts/device-add-write-layer.sh)
+persistent='N'
+if [ -n "$persistent_device" ]; then
+    writable_device="$persistent_device"
+    if [ "$SLX_WRITABLE_DEVICE_PERSISTENT" = "yes" ]; then
+        persistent='P'
+    fi
+else
+    ramdisk_size_in_kb="$SLX_RAMDISK_SIZE_IN_KB"
+    if [ "$ramdisk_size_in_kb" = '' ]; then
+        ramdisk_size_in_kb="$(awk '/MemTotal/ {print $2}' /proc/meminfo)"
+    fi
+    # NOTE: If the kernel modul "brd" is compiled into current kernel we can't
+    # configure ram disk size dynamically. In this case it have to be
+    # configured via kernel command line: "brd.rd_size=SITE_IN_KILOBYTE"
+    # statically:
+    #! rmmod brd 2>/dev/null
+    #modprobe brd max_part=1 rd_size="$ramdisk_size_in_kb"
+    #writable_device='/dev/ram0'
+    ramdisk_location="$(mktemp)"
+    dd of="$ramdisk_location" seek="$ramdisk_size_in_kb" count=0 1>/dev/null
+    writable_device="$(losetup --find)"
+    losetup "$writable_device" "$ramdisk_location"
+fi
+# endregion
+# region connect dnbd3
+IFS_backup="$IFS"
+IFS=","
+return_code=1
+for host in ${SLX_DNBD3_SERVERS}; do
+    logging.info "Trying host \"$host\"."
+    if systemd-preserve-process-marker dnbd3-client --host "$host" --image \
+        "${SLX_DNBD3_IMAGE}" --device "$SLX_DNBD3_DEVICE" \
+        --rid "$SLX_DNBD3_RID"
+    then
+        return_code=0
+        break
+    fi
+done
+IFS="$IFS_backup"
+
+if [[ $return_code != 0 ]]; then
+    logging.warn "Failed to connect \"${SLX_DNBD3_IMAGE}\" (revision" \
+        "\"$SLX_DNBD3_RID\") from one of \"$SLX_DNBD3_SERVERS\" to" \
+        "\"$SLX_DNBD3_DEVICE\"."
+    exit 1
+fi
+# endregion
+# region scan partitions
+if [ "$SLX_LOG_FILE_PATH" != "" ]; then
+    read_only_device="$(container-unpack-xmount "$SLX_DNBD3_DEVICE" \
+        2>>"$SLX_LOG_FILE_PATH")"
+else
+    read_only_device="$(container-unpack-xmount "$SLX_DNBD3_DEVICE")"
+fi
+
+
+# Fail fast if no device could be determined.
+[ -z "$read_only_device" ] && exit 1
+# endregion
+# region find read-only partition
+if [ -z "$SLX_SYSTEM_PARTITION_PREPARATION_SCRIPT" ]; then
+    if [ -z "$SLX_SYSTEM_PARTITION_IDENTIFIER" ]; then
+        # if empty use whole device
+        read_only_partition="$read_only_device"
+        true
+    else
+        read_only_partition="$(tools.find_block_device \
+            "$SLX_SYSTEM_PARTITION_IDENTIFIER" "$read_only_device")"
+    fi
+else
+    eval "$SLX_SYSTEM_PARTITION_PREPARATION_SCRIPT"
+fi
+if [[ ! $? || -z "$read_only_partition" ]]; then
+    logging.error "Failed to find unique device with identifier" \
+        "\"${SLX_SYSTEM_PARTITION_IDENTIFIER}\"; matched devices:" \
+        "\"${read_only_partition}\""
+    exit 1
+fi
+# endregion
+
+logging.info "Using read-only partition: $read_only_partition"
+logging.info "Using writable device $writable_device, persistency: $persistent"
+
+# combine devices with device mapper
+device-add-write-layer "root" "$read_only_partition" "$writable_device" \
+    "$persistent"
+
+}
+exceptions.catch
+{
+    logging.error "$exceptions_last_traceback"
+    emergency_shell "error in ${BASH_SOURCE[0]}"
+}
+# region vim modline
+
+# vim: set tabstop=4 shiftwidth=4 expandtab:
+# vim: foldmethod=marker foldmarker=region,endregion:
+
+# endregion