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Add logging and error handling to backup script

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Add much needed logging and error handling to make sure backups happen
more consistently.
This commit is contained in:
ducoterra
2022-02-04 13:49:31 -05:00
parent 672371887c
commit 7c90ddc5ae
1 changed files with 36 additions and 43 deletions
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79
ansible/arch_backup/templates/btrfs_backup.sh.j2
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@@ -10,50 +10,11 @@
# 7. rm /tmp/uuid
# 8. luksclose
# Backup info
export BACKUP_DRIVE_UUID={{ disk.uuid }}
export BACKUP_DRIVE_PASSWORD={{ disk.password }}
export BACKUP_DRIVE_TMP_UUID=$(uuidgen)
export BACKUP_DRIVE_NAME=luks-$BACKUP_DRIVE_TMP_UUID
# For notifications
export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/{{ notifications.user.uid }}/bus
export USER={{ notifications.user.name }}
export SOURCE_DIR=${SOURCE_DIR:=/}
# Fix basename / showing up as "/" -> change to "root"
if [ $(basename $SOURCE_DIR) = / ]; then
export SNAPSHOT_PREFIX=${SNAPSHOT_PREFIX:=root}
else
export SNAPSHOT_PREFIX=${SNAPSHOT_PREFIX:=$(basename $SOURCE_DIR)}
fi
# Set snapshot prefix based on basename
export SNAPSHOT_TIME=$(date +"%y_%m_%d-%H.%M")
export SNAPSHOT_NAME=$SNAPSHOT_PREFIX-$SNAPSHOT_TIME
export SNAPSHOT_DIR=${SNAPSHOT_DIR:=/.snapshots}
export LATEST=$SNAPSHOT_PREFIX-latest
export BACKUP_DRIVE_MNT=/tmp/$BACKUP_DRIVE_TMP_UUID
export BACKUP_DIR=${BACKUP_DIR:=$BACKUP_DRIVE_MNT/$(hostname)}
# Show snapshot settings
echo "SOURCE_DIR" "$SOURCE_DIR"
echo "SNAPSHOT_PREFIX" "$SNAPSHOT_PREFIX"
echo "SNAPSHOT_TIME" "$SNAPSHOT_TIME"
echo "SNAPSHOT_NAME" "$SNAPSHOT_NAME"
echo "SNAPSHOT_DIR" "$SNAPSHOT_DIR"
echo "LATEST" "$LATEST"
echo "BACKUP_DRIVE_MNT" "$BACKUP_DRIVE_MNT"
echo "BACKUP_DIR" "$BACKUP_DIR"
function exit_success {
# Unmount /tmp/uuid
log "INFO" "Unmounting $BACKUP_DRIVE_MNT"
umount $BACKUP_DRIVE_MNT
# luksClose
log "INFO" "luksClose $BACKUP_DRIVE_NAME"
cryptsetup luksClose $BACKUP_DRIVE_NAME
# Exit
exit 0
}
@@ -63,10 +24,6 @@ function exit_fail {
log "INFO" "Unmounting $BACKUP_DRIVE_MNT"
umount $BACKUP_DRIVE_MNT
# luksClose
log "INFO" "luksClose $BACKUP_DRIVE_NAME"
cryptsetup luksClose $BACKUP_DRIVE_NAME
# Exit
exit 1
}
@@ -99,6 +56,41 @@ function notify {
sudo -E -u $USER notify-send "$LEVEL" "$MESSAGE"
}
# Backup info
export BACKUP_DRIVE_UUID={{ disk.uuid }}
export BACKUP_DRIVE_PASSWORD={{ disk.password }}
export BACKUP_DRIVE_TMP_UUID=$(uuidgen)
export BACKUP_DRIVE_NAME=luks-$BACKUP_DRIVE_UUID
# For notifications
export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/{{ notifications.user.uid }}/bus
export USER={{ notifications.user.name }}
export SOURCE_DIR=${SOURCE_DIR:=/}
# Fix basename / showing up as "/" -> change to "root"
if [ $(basename $SOURCE_DIR) = / ]; then
export SNAPSHOT_PREFIX=${SNAPSHOT_PREFIX:=root}
else
export SNAPSHOT_PREFIX=${SNAPSHOT_PREFIX:=$(basename $SOURCE_DIR)}
fi
# Set snapshot prefix based on basename
export SNAPSHOT_TIME=$(date +"%y_%m_%d-%H.%M")
export SNAPSHOT_NAME=$SNAPSHOT_PREFIX-$SNAPSHOT_TIME
export SNAPSHOT_DIR=${SNAPSHOT_DIR:=/.snapshots}
export LATEST=$SNAPSHOT_PREFIX-latest
export BACKUP_DRIVE_MNT=/tmp/$BACKUP_DRIVE_TMP_UUID
export BACKUP_DIR=${BACKUP_DIR:=$BACKUP_DRIVE_MNT/$(hostname)}
# Show snapshot settings
echo "SOURCE_DIR" "$SOURCE_DIR"
echo "SNAPSHOT_PREFIX" "$SNAPSHOT_PREFIX"
echo "SNAPSHOT_TIME" "$SNAPSHOT_TIME"
echo "SNAPSHOT_NAME" "$SNAPSHOT_NAME"
echo "SNAPSHOT_DIR" "$SNAPSHOT_DIR"
echo "LATEST" "$LATEST"
echo "BACKUP_DRIVE_MNT" "$BACKUP_DRIVE_MNT"
echo "BACKUP_DIR" "$BACKUP_DIR"
# Create readonly snapshot
log "INFO" "Creating snapshot from $SOURCE_DIR as $SNAPSHOT_DIR/$SNAPSHOT_NAME"
if [ -d $SNAPSHOT_DIR/$SNAPSHOT_NAME ]; then
@@ -114,6 +106,7 @@ update_latest $SNAPSHOT_DIR $SNAPSHOT_NAME
# Unlock backup drive
if [ -L /dev/disk/by-uuid/$BACKUP_DRIVE_UUID ]; then
cryptsetup luksOpen /dev/disk/by-uuid/$BACKUP_DRIVE_UUID $BACKUP_DRIVE_NAME --key-file=$BACKUP_DRIVE_PASSWORD
cryptsetup status /dev/mapper/$BACKUP_DRIVE_NAME
else
log "INFO" "Backup drive $BACKUP_DRIVE_UUID not found"
log "INFO" "Snapshot $SNAPSHOT_NAME completed successfully."