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>

<p>The box makes an incremental backup each night. By default the backup is stored on the machine itself, but you can also have it stored on Amazon S3.</p>

<h3>Configuration</h3>

<form class="form-horizontal" role="form" onsubmit="set_custom_backup(); return false;">
  <div class="form-group">
    <label for="backup-target-type" class="col-sm-2 control-label">Backup to:</label>
    <div class="col-sm-3">
      <select class="form-control" rows="1" id="backup-target-type" onchange="toggle_form()">
        <option value="off">Nowhere (Disable Backups)</option>
        <option value="local">{{hostname}}</option>
        <option value="rsync">rsync</option>
        <option value="s3">Amazon S3</option>
      </select>
    </div>
  </div>
  <!-- LOCAL BACKUP -->
  <div class="form-group backup-target-local">
    <div class="col-sm-10 col-sm-offset-2">
      <p>Backups are stored on this machine&rsquo;s own hard disk. You are responsible for periodically using SFTP (FTP over SSH) to copy the backup files from <tt class="backup-location"></tt> to a safe location. These files are encrypted, so they are safe to store anywhere.</p>
      <p>Separately copy the encryption password from <tt class="backup-encpassword-file"></tt> to a safe and secure location. You will need this file to decrypt backup files.</p>
    </div>
  </div>
  <!-- RSYNC BACKUP -->
  <div class="form-group backup-target-rsync">
    <div class="col-sm-10 col-sm-offset-2">

      <p>Backups synced to a remote machine using rsync over SSH, with local
      copies in <tt class="backup-location"></tt>. These files are encrypted, so
      they are safe to store anywhere.</p> <p>Separately copy the encryption
      password from <tt class="backup-encpassword-file"></tt> to a safe and
      secure location. You will need this file to decrypt backup files.</p>

    </div>
  </div>
  <div class="form-group backup-target-rsync">
    <label for="backup-target-rsync-host" class="col-sm-2 control-label">Hostname</label>
    <div class="col-sm-8">
      <input type="text" placeholder="hostname.local" class="form-control" rows="1" id="backup-target-rsync-host">
    </div>
  </div>
  <div class="form-group backup-target-rsync">
    <label for="backup-target-rsync-path" class="col-sm-2 control-label">Path</label>
    <div class="col-sm-8">
        <input type="text" placeholder="/backups/{{hostname}}" class="form-control" rows="1" id="backup-target-rsync-path">
    </div>
  </div>
  <div class="form-group backup-target-rsync">
    <label for="backup-target-rsync-user" class="col-sm-2 control-label">Username</label>
    <div class="col-sm-8">
      <input type="text" class="form-control" rows="1" id="backup-target-rsync-user">
    </div>
  </div>
  <div class="form-group backup-target-rsync">
    <label for="ssh-pub-key" class="col-sm-2 control-label">Public SSH Key</label>
    <div class="col-sm-8">
      <input type="text" class="form-control" rows="1" id="ssh-pub-key" readonly>
      <div class="small" style="margin-top: 2px">
        Copy the Public SSH Key above, and paste it within the <tt>~/.ssh/authorized_keys</tt>
        of target user on the backup server specified above. That way you'll enable secure and
        passwordless authentication from your mail-in-a-box server and your backup server.
      </div>
    </div>
  </div>
  <!-- S3 BACKUP -->
  <div class="form-group backup-target-s3">
    <div class="col-sm-10 col-sm-offset-2">
      <p>Backups are stored in an Amazon Web Services S3 bucket. You must have an AWS account already.</p>
      <p>You MUST manually copy the encryption password from <tt class="backup-encpassword-file"></tt> to a safe and secure location. You will need this file to decrypt backup files. It is NOT stored in your Amazon S3 bucket.</p>
    </div>
  </div>
  <div class="form-group backup-target-s3">
    <label for="backup-target-s3-host-select" class="col-sm-2 control-label">S3 Region</label>
    <div class="col-sm-8">
      <select class="form-control" rows="1" id="backup-target-s3-host-select">
        {% for name, host in backup_s3_hosts %}
          <option value="{{host}}">{{name}}</option>
        {% endfor %}
        <option value="other">Other</option>
      </select>
    </div>
  </div>
  <div class="form-group backup-target-s3">
    <label for="backup-target-s3-host" class="col-sm-2 control-label">S3 Host / Endpoint</label>
    <div class="col-sm-8">
      <input type="text" placeholder="Endpoint" class="form-control" rows="1" id="backup-target-s3-host">
    </div>
  </div>
  <div class="form-group backup-target-s3">
    <label for="backup-target-s3-path" class="col-sm-2 control-label">S3 Path</label>
    <div class="col-sm-8">
      <input type="text" placeholder="your-bucket-name/backup-directory" class="form-control" rows="1" id="backup-target-s3-path">
    </div>
  </div>
  <div class="form-group backup-target-s3">
    <label for="backup-target-user" class="col-sm-2 control-label">S3 Access Key</label>
    <div class="col-sm-8">
      <input type="text" class="form-control" rows="1" id="backup-target-user">
    </div>
  </div>
  <div class="form-group backup-target-s3">
    <label for="backup-target-pass" class="col-sm-2 control-label">S3 Secret Access Key</label>
    <div class="col-sm-8">
      <input type="text" class="form-control" rows="1" id="backup-target-pass">
    </div>
  </div>
  <!-- Common -->
  <div class="form-group backup-target-local backup-target-rsync backup-target-s3">
    <label for="min-age" class="col-sm-2 control-label">Retention Days:</label>
    <div class="col-sm-8">
      <input type="number" class="form-control" rows="1" id="min-age">
      <div class="small" style="margin-top: 2px">This is the minimum time backup data is kept for. The box makes an incremental backup most nights, which requires that previous backups back to the most recent full backup be preserved, so backup data is often kept much longer than this setting. Full backups are made periodically when the incremental backup data size exceeds a limit.</div>
    </div>
  </div>
  <div class="form-group">
    <div class="col-sm-offset-2 col-sm-10">
      <button id="set-s3-backup-button" type="submit" class="btn btn-primary">Save</button>
    </div>
  </div>
</form>

<h3>Available backups</h3>

<p>The backup location currently contains the backups listed below. The total size of the backups is currently <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>

<!-- Hide these buttons until we're sure we can use them :) -->
<button id="create-full-backup-button" class="btn btn-primary" onclick="do_backup(true)" style="display: none;">Create Full Backup Now</button>
<button id="create-incremental-backup-button" class="btn btn-primary" onclick="do_backup(false)" style="display: none;">Create Incremental Backup Now</button>

<script>

function toggle_form() {
  var target_type = $("#backup-target-type").val();
  $(".backup-target-local, .backup-target-rsync, .backup-target-s3").hide();
  $(".backup-target-" + target_type).show();

  init_inputs(target_type);
}

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() {
  show_custom_backup()

  $('#backup-status tbody').html("<tr><td colspan='2' class='text-muted'>Loading...</td></tr>")
  api(
    "/system/backup/status",
    "GET",
    { },
    function(r) {
      if (r.error) {
          show_modal_error("Backup Error", $("<pre/>").text(r.error));
          return;
      }

      $('#backup-status tbody').html("");
      var total_disk_size = 0;

      if (typeof r.backups == "undefined") {
        var tr = $('<tr><td colspan="3">Backups are turned off.</td></tr>');
        $('#backup-status tbody').append(tr);
        $('#create-full-backup-button').css("display","none")
        $('#create-incremental-backup-button').css("display","none")
        return;
      } else if (r.backups.length == 0) {
        var tr = $('<tr><td colspan="3">No backups have been made yet.</td></tr>');
        $('#backup-status tbody').append(tr);
      }

      // Backups ARE enabled.
      $('#create-full-backup-button').css("display","unset")
      $('#create-incremental-backup-button').css("display","unset")
      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) );
        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.size)) );
        if (b.deleted_in)
          tr.append( $('<td/>').text(b.deleted_in) );
        else
          tr.append( $('<td class="text-muted">unknown</td>') );
        $('#backup-status tbody').append(tr);

        total_disk_size += b.size;
      }

      total_disk_size += r.unmatched_file_size;
      $('#backup-total-size').text(nice_size(total_disk_size));
    })
}

function show_custom_backup() {
    $(".backup-target-local, .backup-target-rsync, .backup-target-s3").hide();
    api(
      "/system/backup/config",
      "GET",
      { },
      function(r) {
        $("#backup-target-user").val(r.target_user);
        $("#backup-target-pass").val(r.target_pass);
        $("#min-age").val(r.min_age_in_days);
        $(".backup-location").text(r.file_target_directory);
        $(".backup-encpassword-file").text(r.enc_pw_file);
        $("#ssh-pub-key").val(r.ssh_pub_key);

        if (r.target == "file://" + r.file_target_directory) {
          $("#backup-target-type").val("local");
        } else if (r.target == "off") {
          $("#backup-target-type").val("off");
        } else if (r.target.substring(0, 8) == "rsync://") {
          $("#backup-target-type").val("rsync");
          var path = r.target.substring(8).split('//');
          var host_parts = path.shift().split('@');
          $("#backup-target-rsync-user").val(host_parts[0]);
          $("#backup-target-rsync-host").val(host_parts[1]);
          $("#backup-target-rsync-path").val('/'+path[0]);
        } else if (r.target.substring(0, 5) == "s3://") {
          $("#backup-target-type").val("s3");
          var hostpath = r.target.substring(5).split('/');
          var host = hostpath.shift();
          $("#backup-target-s3-host").val(host);
          $("#backup-target-s3-path").val(hostpath.join('/'));
        }
        toggle_form()
      })
}

function set_custom_backup() {
  var target_type = $("#backup-target-type").val();
  var target_user = $("#backup-target-user").val();
  var target_pass = $("#backup-target-pass").val();

  var target;
  if (target_type == "local" || target_type == "off")
    target = target_type;
  else if (target_type == "s3")
    target = "s3://" + $("#backup-target-s3-host").val() + "/" + $("#backup-target-s3-path").val();
  else if (target_type == "rsync") {
    target = "rsync://" + $("#backup-target-rsync-user").val() + "@" + $("#backup-target-rsync-host").val()
                                                                + "/" + $("#backup-target-rsync-path").val();
    target_user = '';
  }


  var min_age = $("#min-age").val();
  api(
    "/system/backup/config",
    "POST",
    {
      target: target,
      target_user: target_user,
      target_pass: target_pass,
      min_age: min_age
    },
    function(r) {
      // use .text() --- it's a text response, not html
      show_modal_error("Backup configuration", $("<p/>").text(r), function() { if (r == "OK") show_system_backup(); }); // refresh after modal on success
    },
    function(r) {
      // use .text() --- it's a text response, not html
      show_modal_error("Backup configuration", $("<p/>").text(r));
    });
  return false;
}

function init_inputs(target_type) {
  function set_host(host) {
    if(host !== 'other') {
      $("#backup-target-s3-host").val(host);
    } else {
      $("#backup-target-s3-host").val('');
    }
  }
  if (target_type == "s3") {
    $('#backup-target-s3-host-select').off('change').on('change', function() {
      set_host($('#backup-target-s3-host-select').val());
    });
    set_host($('#backup-target-s3-host-select').val());
  }
}

function do_backup(is_full) {
  let disclaimer = "The backup process will pause some services (such as PHP, Postfix and Dovecot). Depending on the size of the data this can take a while."
  if (!is_full) {
    disclaimer += "\nDepending on the amount of incremental backups done after the last full backup, the box may decide to do a full backup instead."
  }
  show_modal_confirm("Warning!", disclaimer, "Start Backup", () => {
    api(
    "/system/backup/new",
    "POST",
    {
      full: is_full
    },
    function(r) {
      // use .text() --- it's a text response, not html
      show_modal_error("Backup configuration", $("<p/>").text(r), function() { if (r == "OK") show_system_backup(); }); // refresh after modal on success
    },
    function(r) {
      // use .text() --- it's a text response, not html
      show_modal_error("Backup configuration", $("<p/>").text(r));
    });
  return false;
  })
}

</script>