mailinabox/management/templates/system-backup.html

<style>
#backup-status th { text-align: center; }
#backup-status tr.full-backup td { font-weight: bold; }
</style>

<h2>Backup Status</h2>

<h3>Copying Backup Files</h3>

<p>The box makes an incremental backup each night. The backup is stored on the machine itself. You are responsible for copying the backup files off of the machine.</p>

<p>Many cloud providers make this easy by allowing you to take snapshots of the machine's disk.</p>

<p>You can also use SFTP (FTP over SSH) to copy files from <tt id="backup-location"></tt>. These files are encrpyted, so they are safe to store anywhere. Copy the encryption password from <tt id="backup-encpassword-file"></tt> also but keep it in a safe location.</p>

<h3>Current Backups</h3>

<p>The backup directory currently contains the backups listed below. The total size on disk of the backups is <span id="backup-total-size"></span>.</p>

<table id="backup-status" class="table" style="width: auto">
  <thead>
    <th colspan="2">When</th>
    <th>Type</th>
    <th>Size</th>
    <th>Deleted in...</th>
  </thead>
  <tbody>
  </tbody>
</table>

<p><small>The size column in the table indicates the size of the encrpyted backup, but the total size on disk shown above includes storage for unencrpyted intermediate files.</small></p>

<script>
function nice_size(bytes) {
  var powers = ['bytes', 'KB', 'MB', 'GB', 'TB'];
  while (true) {
    if (powers.length == 1) break;
    if (bytes < 1000) break;
    bytes /= 1024;
    powers.shift();
  }
  // round to have three significant figures but at most one decimal place
  if (bytes >= 100)
    bytes = Math.round(bytes)
  else
    bytes = Math.round(bytes*10)/10;
  return bytes + " " + powers[0];
}

function show_system_backup() {
  $('#backup-status tbody').html("<tr><td colspan='2' class='text-muted'>Loading...</td></tr>")
  api(
    "/system/backup/status",
    "GET",
    { },
    function(r) {
      $('#backup-location').text(r.encdirectory);
      $('#backup-encpassword-file').text(r.encpwfile);

      $('#backup-status tbody').html("");
      var total_disk_size = 0;
      for (var i = 0; i < r.backups.length; i++) {
        var b = r.backups[i];
        var tr = $('<tr/>');
        if (b.full) tr.addClass("full-backup");
        tr.append( $('<td/>').text(b.date_str + " " + r.tz) );
        tr.append( $('<td/>').text(b.date_delta + " ago") );
        tr.append( $('<td/>').text(b.full ? "full" : "increment") );
        tr.append( $('<td style="text-align: right"/>').text( nice_size(b.encsize)) );
        if (b.deleted_in)
          tr.append( $('<td/>').text(b.deleted_in) );
        else
          tr.append( $('<td class="text-muted">n/a</td>') );
        $('#backup-status tbody').append(tr);

        total_disk_size += b.size;
        total_disk_size += b.encsize;
      }

      $('#backup-total-size').text(nice_size(total_disk_size));
    })
}
</script>