On Mon, Mar 08, 2021 at 12:56:24PM +0800, Xu Xijian wrote:

When mount local filesystem in os starting, we will create or use a local existed logical volume to replace remote filesystem.

Signed-off-by: Xu Xijian hdxuxijian@163.com

.../dracut-initrd/bin/set-local-sysroot.sh | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 container/dracut-initrd/bin/set-local-sysroot.sh

diff --git a/container/dracut-initrd/bin/set-local-sysroot.sh b/container/dracut-initrd/bin/set-local-sysroot.sh new file mode 100644 index 0000000..65e6d3e --- /dev/null +++ b/container/dracut-initrd/bin/set-local-sysroot.sh @@ -0,0 +1,78 @@ +#!/bin/sh

+analyse_kernel_cmdline_params() {

• rootfs="$(getarg root=)"

Add sample like: root=172.168.131.2:/os/openeuler/aarch64/xxj-snapshot/20210226104900

• rootfs_src=$(echo $"$rootfs" | sed 's////')
• timestamp="$(basename $root)"
• export rootfs_src timestamp

+}

+rsync_src_lv() {

rsync_src_lv() => sync_src_lv()

• local src_lv="$1"

add one comment for src_lv maybe enough? /dev/mapper/os-openeuler_aarch64_20.03_20210226104900

• [ -e "$src_lv" ] && return # /dev/mapper/os-openeuler-aarch64-20210226104900
• # create logical volume
• src_lv_devname="$(basename $src_lv)" # os-openeuler_aarch64_20210226104900
• lvm lvcreate -L 10G --name "${src_lv_devname#os-}" os # openeuler_aarch64_20210226104900

maybe you need -y for lvcreate here?

• mke2fs -t ext4 -F "$src_lv"
• # sync nfsroot to $src_lv
• mkdir -p /mnt1 && mount -t nfs "$rootfs_src" /mnt1
• mkdir -p /mnt2 && mount "$src_lv" /mnt2
• cp -a /mnt1/. /mnt2/
• umount /mnt1 /mnt2
• # change permission of "$src_lv" to readonly
• lvm lvchange --permission r "$src_lv"

+}

+snapshot_boot_lv() {

• local src_lv="$1"
• local boot_lv="$2"
• [ "$src_lv" == "$boot_lv" ] && return
• lvm lvremove --force "$boot_lv"
• boot_lv_devname="$(basename $boot_lv)"
• lvm lvcreate --size 10G --name ${boot_lv_devname#os-} --snapshot "$src_lv"

+}

+set_sysroot() {

• boot_lv="$1"
• umount "$NEWROOT"
• mount "$boot_lv" "$NEWROOT"

+}

+if ! getargbool 0 local; then

• exit 0

+fi

+analyse_kernel_cmdline_params

+sed -i "s/^locking_type = .*/locking_type = 1/" /etc/lvm/lvm.conf

+use_root_partition="$(getarg use_root_partition=)" +if [ -n "$use_root_partition" ]; then

• src_lv="$use_root_partition" # "$use_root_partition" "$root_$timestamp", root from getarg root=

=> # "$use_root_partition": /dev/mapper/os-${os}_${os_arch}_${os_version}_${timestamp} The format of src_lv need to be changed.

• rsync_src_lv "$src_lv"

+else

• src_lv="/dev/mapper/os-openeuler_aarch64_$timestamp" # "os-openeuler_aarch64_$timestamp"
• [ -e "src_lv" ] || {

•    echo "warn dracut: FATAL: no src_lv with local mount, reboot"
  

•    reboot
  

• }

+fi

+save_root_partition="$(getarg save_root_partition=)" +if [ -n "$save_root_partition" ]; then

• boot_lv="$save_root_partition" # "os-openeuler_aarch64_$save_partition"

The format of boot_lv need to be changed.

+else

• boot_lv="/dev/mapper/os-openeuler_aarch64_default"

os-openeuler_aarch64_default should be os-${os}_${os_arch}_${os_version}. The same as upon.

-------- Thanks Yu Chuan

+fi

+snapshot_boot_lv "$src_lv" "$boot_lv"

+set_sysroot "$boot_lv"

+exit 0

2.23.0