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| author | Mitch Riedstra <mitch@riedstra.us> | 2019-03-17 23:47:27 -0400 |
|---|---|---|
| committer | Mitch Riedstra <mitch@riedstra.us> | 2019-03-17 23:47:27 -0400 |
| commit | 0622e7892223ec3b1438bd50c7863f37aad3d10a (patch) | |
| tree | 23eb98dd579b78d8fdf3e925a8eb71c98a47b176 /lvm-snapshot.sh | |
| parent | fa6940329295979ef41f616680b6dede583ddb05 (diff) | |
| parent | d40c833ea8d95808c09e6463725dfe678f195185 (diff) | |
| download | dotfiles-0622e7892223ec3b1438bd50c7863f37aad3d10a.tar.gz dotfiles-0622e7892223ec3b1438bd50c7863f37aad3d10a.tar.xz | |
Merge branch 'master' of rygel.us:~/mitch/dotfiles
Diffstat (limited to 'lvm-snapshot.sh')
| -rw-r--r-- | lvm-snapshot.sh | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lvm-snapshot.sh b/lvm-snapshot.sh new file mode 100644 index 0000000..4991495 --- /dev/null +++ b/lvm-snapshot.sh @@ -0,0 +1,31 @@ +#!/bin/sh +set -e + +vg="x230" +lv="root" +snap_name="${lv}-snap" +mountpoint="/mnt/snap" +PERCENT="100" + +mount_fs() { + _device="$1"; shift + _opts="nouuid,rw" + _mntpoint="$1"; shift + if ! [ -d "$_mntpoint" ] ; then + mkdir "$_mntpoint" + fi + mount -o "$_opts" "$_device" "$_mntpoint" +} + +# If snapshot doesn't exist +if ! lvm lvs "$vg/$snap_name" >/dev/null 2>&1 ; then + lvm lvcreate "$vg/$lv" -s --name "$snap_name" -l "${PERCENT}%ORIGIN" + mount_fs "/dev/$vg/$snap_name" "$mountpoint" + sed -i.bak -r "s@(/dev/${vg}/${lv})@\1${snap_name}@" \ + "$mountpoint/etc/fstab" + umount "$mountpoint" +else + printf 'Cannot continue snapshot "%s" already exists.\n' \ + "$vg/$snap_name" + exit 1; +fi |