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Diffstat (limited to 'builder/dnbd3-qcow2-rootfs/module-setup.sh')
| -rw-r--r-- | builder/dnbd3-qcow2-rootfs/module-setup.sh | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/builder/dnbd3-qcow2-rootfs/module-setup.sh b/builder/dnbd3-qcow2-rootfs/module-setup.sh new file mode 100644 index 00000000..b3f14c1d --- /dev/null +++ b/builder/dnbd3-qcow2-rootfs/module-setup.sh @@ -0,0 +1,121 @@ +#!/bin/bash + +check() { + if ! type -f qemu-nbd >/dev/null; then + echo "'qemu-nbd' not found on this system, install it to use this module." + return 1 + fi + if ! type -f qemu-img >/dev/null; then + echo "'qemu-img' not found on this system, install it to use this module." + return 1 + fi + if ! type -f nbd-client >/dev/null; then + echo "'nbd-client' not found on this system, install it to use this module." + return 1 + else + # check version + local nbd_client_version="$(nbd-client --help 2>&1 | grep -oE '3\.[0-9]+')" + local nbd_client_version_major="${nbd_client_version%.*}" + local nbd_client_version_minor="${nbd_client_version#*.}" + if [ "${nbd_client_version_major}" -ne 3 ]; then + # nbd-client probably too old + echo "The nbd-client major version is not 3, meaning its probably too old." + return 1 + fi + if [ "${nbd_client_version_minor}" -gt 8 ]; then + # TODO check if ver = 3.9 has the same new syntax... + echo "The nbd-client minor version is greater than 8. A new syntax has been + introduced starting with 3.10 which we do not support." + return 1 + fi + return 0 + fi +} + +depends() { + echo base network bash kernel-modules + return 0 +} + +installkernel() { + instmods ext4 +} + +install() { + ### BINARIES + # + # busybox: cause we want lightweight tools + inst "$moddir/binaries/busybox" /usr/bin/busybox + # dnbd3-client: needed to mount remote dnbd3 filesystem. + inst "$moddir/binaries/dnbd3-client" /usr/bin/dnbd3-client + # A generic wrapper program to prepend a "@" to each process + # spawned by given nested programs. + inst "$moddir/binaries/systemd-preserve-process-marker" \ + /usr/bin/systemd-preserve-process-marker + + # NOTE: These modules are build again Kernel: 3.10.0-229.1.2.el7.x86_64 + # TODO: build these in check() ! + inst "$moddir/kernel_modules/dnbd3.ko" \ + /usr/lib/modules/current/extra/dnbd3.ko + inst "$moddir/kernel_modules/nbd.ko" \ + /usr/lib/modules/current/extra/nbd.ko + + ### HOOKS + ## HOOK cmdline + # enables sysrq-shortcuts + inst_hook cmdline 00 "$moddir/hooks/cmdline/enable-sysrq.sh" + + # expands the ip parameter in the kernel command line to + # make it dracut-compatible + # TODO: dracut still parses this incorrectly... + inst_hook cmdline 10 "$moddir/hooks/cmdline/expand-kcl-ip.sh" + + # sets environment variables to tell dracut which device + # holds the future root filesystem + inst_hook cmdline 90 "$moddir/hooks/cmdline/mark-root-device.sh" + + ## HOOK pre-udev + # loads the dnbd3/nbd kernel modules + inst_hook pre-udev 00 "$moddir/hooks/pre-udev/load-dnbd3-nbd-modules.sh" + + # setup loopback device + inst_hook pre-udev 00 "$moddir/hooks/pre-udev/lo-setup.sh" + + ## HOOK pre-mount + # this is the configuration hook where the config stuff is wget'ed + inst_hook pre-mount 00 "$moddir/hooks/pre-mount/fetch-config.sh" + + # this is the main hook where all the magic is triggered + inst_hook pre-mount 10 "$moddir/hooks/pre-mount/mount-qcow.sh" + + ## HOOK mount + # this simply mounts the prepared /dev/root to $NEWROOT + # aka "the dracut way" + inst_hook mount 10 "$moddir/hooks/mount/mount-root-device.sh" + + ## HOOK pre-pivot + # this checks whether we found a partition suitable for + # the future /tmp and if so, mounts it + inst_hook pre-pivot 00 "$moddir/hooks/pre-pivot/mount-tmp.sh" + + ### SCRIPTS + # the main magic script containing all the functions needed + # to prepare the qcow2-based root filesystem + inst "$moddir/scripts/setup-qcow2" /sbin/setup-qcow2 + + # the script triggered by udev upon finding the right partitions + inst "$moddir/scripts/prepare-disks" /sbin/prepare-disks + + # udev rules detecting 44, 45, 46 partitions and running + # 'prepare-disks' to do then format/mount/use them + inst "$moddir/udev/70-openslx-disk.rules" /etc/udev/rules.d/70-openslx-disk.rules + + # Debugging Uncomment this version if you need some useful debugging tools + # in your iniramfs. + inst_multiple lsblk ping ip ifconfig sshd htop tail head cat vim \ + touch sed lsmod insmod qemu-img sleep route wget find lsof strace \ + chroot switch_root pivot_root qemu-nbd mount nbd-client fdisk mkfs.xfs + # Production: + # inst_multiple insmod qemu-img qemu-nbd + return 0 +} |