Commit 7ec35b21 authored by nimrod's avatar nimrod
Browse files

Simpler backup script. 

Backups across the different services have been changed. There are now
snapshots for each services with copies saved for a few weeks. All of
them under /var/backups. The backup script doesn't need to work around
btrfs subvolumes. Instead just snapshotting /var/backups and rsync'ing
to a removable media. The old script is kept in source for reference.
parent c10d7210

Ansible/roles/debian_server/files/offsite-backup

0 → 100755
+62 −0
Original line number Diff line number Diff line 
#!/bin/sh

set -eu



is_btrfs() {

    [ "$(df --output=fstype "$1" | tail +2)" = 'btrfs' ]

}



is_subvolume() {

    btrfs subvolume show "$1" >/dev/null 2>&1

}



root_subvolume() {

    path="$1"

    until is_subvolume "$path" || [ "$path" = '/' ]

    do

        path="$(dirname "$path")"

    done

    echo "$path"

}



cleanup() {

    exit_code="$?"

    if [ -n "${snapshot:-}" ]

    then

        btrfs subvolume delete "$snapshot"

    fi

    sync --file-system "$destination"

    if [ "$exit_code" -eq 0 ]

    then

        curl -so /dev/null "https://notify.shore.co.il/send?message=Backup%20finished%20successfully%20on%20$(hostname -s)."

    else

        curl -so /dev/null  "https://notify.shore.co.il/send?message=Backup%20failed%20on%20$(hostname -s)."

    fi

}



if [ "$#" -ne 1 ]

then

    echo "Usage: $0 destination" >&2

    exit 1

fi



if ! is_btrfs /var/backups

then

    echo '/var/backups is not on btrfs filesystem. Exiting.' >&2

    exit 1

fi



trap 'cleanup' INT QUIT EXIT TERM



destination="$1"

volume="$(root_subvolume /var/backups)"

snapshot="$(mktemp --dry-run "--tmpdir=$volume")"

btrfs subvolume snapshot -r "$volume" "$snapshot"

source="/var/backups"

source="${snapshot}${source#$volume}/"



sync --file-system /var/backups

rsync --archive \

      --delete \

      --info=progress2 \

      "$source" \

      "$destination"

Ansible/roles/debian_server/tasks/btrfs.yml

+2 −2
Original line number Diff line number Diff line
@@ -9,11 +9,11 @@ 


- name: Copy btrfs backup script

  ansible.builtin.copy:

    dest: /usr/local/sbin/btrfs-backup

    dest: /usr/local/sbin/offsite-backup

    group: root

    mode: preserve

    owner: root

    src: btrfs-backup

    src: offsite-backup



- name: Install btrfs scrub services and timers

  loop: &loop