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|
/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Timers;
using System.Text.RegularExpressions;
using log4net;
using Mono.Addins;
using Nini.Config;
using OpenSim.Framework;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
namespace OpenSim.Region.OptionalModules.World.AutoBackup
{
/// <summary>
/// Choose between ways of naming the backup files that are generated.
/// </summary>
/// <remarks>Time: OARs are named by a timestamp.
/// Sequential: OARs are named by counting (Region_1.oar, Region_2.oar, etc.)
/// Overwrite: Only one file per region is created; it's overwritten each time a backup is made.</remarks>
public enum NamingType
{
Time,
Sequential,
Overwrite
}
///<summary>
/// AutoBackupModule: save OAR region backups to disk periodically
/// </summary>
/// <remarks>
/// Config Settings Documentation.
/// Configuration setting can be specified in two places: OpenSim.ini and/or Regions.ini.
///
/// OpenSim.ini only settings section [AutoBackupModule]
/// AutoBackupModuleEnabled: True/False. Default: False. If True, use the auto backup module.
/// if false module is disable and all rest is ignored
/// AutoBackupInterval: Double, non-negative value. Default: 720 (12 hours).
/// The number of minutes between each backup attempt.
///
/// Next can be set on OpenSim.ini, as default, and or per region in Regions.ini
/// Region-specific settings take precedence.
///
/// AutoBackup: True/False. Default: False. If True, activate auto backup functionality.
/// controls backup per region, with default optionaly set on OpenSim.ini
/// AutoBackupSkipAssets
/// If true, assets are not saved to the oar file. Considerably reduces impact on simulator when backing up. Intended for when assets db is backed up separately
/// AutoBackupKeepFilesForDays
/// Backup files older than this value (in days) are deleted during the current backup process, 0 will disable this and keep all backup files indefinitely
/// AutoBackupScript: String. Default: not specified (disabled).
/// File path to an executable script or binary to run when an automatic backup is taken.
/// The file should really be (Windows) an .exe or .bat, or (Linux/Mac) a shell script or binary.
/// Trying to "run" directories, or things with weird file associations on Win32, might cause unexpected results!
/// argv[1] of the executed file/script will be the file name of the generated OAR.
/// If the process can't be spawned for some reason (file not found, no execute permission, etc), write a warning to the console.
/// AutoBackupNaming: string. Default: Time.
/// One of three strings (case insensitive):
/// "Time": Current timestamp is appended to file name. An existing file will never be overwritten.
/// "Sequential": A number is appended to the file name. So if RegionName_x.oar exists, we'll save to RegionName_{x+1}.oar next. An existing file will never be overwritten.
/// "Overwrite": Always save to file named "${AutoBackupDir}/RegionName.oar", even if we have to overwrite an existing file.
/// AutoBackupDir: String. Default: "." (the current directory).
/// A directory (absolute or relative) where backups should be saved.
/// </remarks>
[Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "AutoBackupModule")]
public class AutoBackupModule : ISharedRegionModule
{
private static readonly ILog m_log =
LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private readonly AutoBackupModuleState m_defaultState = new AutoBackupModuleState();
private readonly Dictionary<IScene, AutoBackupModuleState> m_states =
new Dictionary<IScene, AutoBackupModuleState>(1);
private delegate T DefaultGetter<T>(string settingName, T defaultValue);
private bool m_enabled;
private ICommandConsole m_console;
private List<Scene> m_Scenes = new List<Scene> ();
private Timer m_masterTimer;
private bool m_busy;
private IConfigSource m_configSource;
/// <summary>
/// Required by framework.
/// </summary>
public bool IsSharedModule
{
get { return true; }
}
#region ISharedRegionModule Members
/// <summary>
/// Identifies the module to the system.
/// </summary>
string IRegionModuleBase.Name
{
get { return "AutoBackupModule"; }
}
/// <summary>
/// We don't implement an interface, this is a single-use module.
/// </summary>
Type IRegionModuleBase.ReplaceableInterface
{
get { return null; }
}
/// <summary>
/// Called once in the lifetime of the module at startup.
/// </summary>
/// <param name="source">The input config source for OpenSim.ini.</param>
void IRegionModuleBase.Initialise(IConfigSource source)
{
// Determine if we have been enabled at all in OpenSim.ini -- this is part and parcel of being an optional module
m_configSource = source;
IConfig moduleConfig = source.Configs["AutoBackupModule"];
if (moduleConfig == null)
{
m_enabled = false;
return;
}
m_enabled = moduleConfig.GetBoolean("AutoBackupModuleEnabled", false);
if(!m_enabled)
return;
m_log.Info("[AUTO BACKUP]: AutoBackupModule enabled");
m_masterTimer = new Timer(43200000);
m_masterTimer.Elapsed += HandleElapsed;
m_masterTimer.AutoReset = false;
ParseDefaultConfig();
m_log.Debug("[AUTO BACKUP]: Default config:");
m_log.Debug(m_defaultState.ToString());
m_console = MainConsole.Instance;
m_console.Commands.AddCommand (
"AutoBackup", true, "dooarbackup",
"dooarbackup <regionName>",
"do single region backup into a oar. Identical to save oar but using AutoBackup settings for name etc", DoBackup);
m_busy = true;
}
/// <summary>
/// Called once at de-init (sim shutting down).
/// </summary>
void IRegionModuleBase.Close()
{
if (!m_enabled)
return;
// We don't want any timers firing while the sim's coming down; strange things may happen.
m_masterTimer.Dispose();
}
/// <summary>
/// Currently a no-op for AutoBackup because we have to wait for region to be fully loaded.
/// </summary>
/// <param name="scene"></param>
void IRegionModuleBase.AddRegion (Scene scene)
{
if (!m_enabled)
return;
lock (m_Scenes)
m_Scenes.Add (scene);
}
/// <summary>
/// Here we just clean up some resources and stop the OAR backup (if any) for the given scene.
/// </summary>
/// <param name="scene">The scene (region) to stop performing AutoBackup on.</param>
void IRegionModuleBase.RemoveRegion(Scene scene)
{
if (m_enabled)
return;
lock(m_Scenes)
{
if (m_states.ContainsKey(scene))
m_states.Remove(scene);
m_Scenes.Remove(scene);
}
}
/// <summary>
/// Most interesting/complex code paths in AutoBackup begin here.
/// We read lots of Nini config, maybe set a timer, add members to state tracking Dictionaries, etc.
/// </summary>
/// <param name="scene">The scene to (possibly) perform AutoBackup on.</param>
void IRegionModuleBase.RegionLoaded(Scene scene)
{
if (!m_enabled)
return;
// This really ought not to happen, but just in case, let's pretend it didn't...
if (scene == null)
return;
AutoBackupModuleState abms = ParseConfig(scene);
if(abms == null)
{
m_log.Debug("[AUTO BACKUP]: Config for " + scene.RegionInfo.RegionName);
m_log.Debug("DEFAULT");
abms = new AutoBackupModuleState(m_defaultState);
}
else
{
m_log.Debug("[AUTO BACKUP]: Config for " + scene.RegionInfo.RegionName);
m_log.Debug(abms.ToString());
}
m_states.Add(scene, abms);
m_busy = false;
m_masterTimer.Start();
}
/// <summary>
/// Currently a no-op.
/// </summary>
void ISharedRegionModule.PostInitialise()
{
}
#endregion
private void DoBackup (string module, string[] args)
{
if (!m_enabled)
return;
if(m_busy)
{
MainConsole.Instance.OutputFormat ("Already doing a backup, please try later");
return;
}
if (args.Length != 2)
{
MainConsole.Instance.OutputFormat ("Usage: dooarbackup <regionname>");
return;
}
m_busy = true;
bool found = false;
string name = args [1];
Scene[] scenes;
lock (m_Scenes)
scenes = m_Scenes.ToArray();
if(scenes == null)
return;
Scene s;
try
{
for(int i = 0; i < scenes.Length; i++)
{
s = scenes[i];
if (s.Name == name)
{
found = true;
m_masterTimer.Stop();
DoRegionBackup(s);
break;
}
}
} catch { }
if (!found)
MainConsole.Instance.OutputFormat ("No such region {0}. Nothing to backup", name);
m_busy = false;
}
private void ParseDefaultConfig()
{
IConfig config = m_configSource.Configs["AutoBackupModule"];
if (config == null)
return;
// Borrow an existing timer if one exists for the same interval; otherwise, make a new one.
double interval = config.GetDouble("AutoBackupInterval", 720);
interval *= 60000.0;
m_masterTimer.Interval = interval;
m_defaultState.Enabled = config.GetBoolean("AutoBackup", m_defaultState.Enabled);
// Included Option To Skip Assets
m_defaultState.SkipAssets = config.GetBoolean("AutoBackupSkipAssets",m_defaultState.SkipAssets);
// How long to keep backup files in days, 0 Disables this feature
m_defaultState.KeepFilesForDays = config.GetInt("AutoBackupKeepFilesForDays",m_defaultState.KeepFilesForDays);
// Set file naming algorithm
string stmpNamingType = config.GetString("AutoBackupNaming", m_defaultState.NamingType.ToString());
NamingType tmpNamingType;
if (stmpNamingType.Equals("Time", StringComparison.CurrentCultureIgnoreCase))
tmpNamingType = NamingType.Time;
else if (stmpNamingType.Equals("Sequential", StringComparison.CurrentCultureIgnoreCase))
tmpNamingType = NamingType.Sequential;
else if (stmpNamingType.Equals("Overwrite", StringComparison.CurrentCultureIgnoreCase))
tmpNamingType = NamingType.Overwrite;
else
{
m_log.Warn("Unknown naming type specified for Default");
tmpNamingType = NamingType.Time;
}
m_defaultState.NamingType = tmpNamingType;
m_defaultState.Script = config.GetString("AutoBackupScript", m_defaultState.Script);
string backupDir = config.GetString("AutoBackupDir", ".");
if (backupDir != ".")
{
try
{
DirectoryInfo dirinfo = new DirectoryInfo(backupDir);
if (!dirinfo.Exists)
dirinfo.Create();
}
catch (Exception e)
{
m_log.Warn(
"[AUTO BACKUP]: BAD NEWS. You won't be able to save backups to directory " +
backupDir +
" because it doesn't exist or there's a permissions issue with it. Here's the exception.",
e);
}
}
m_defaultState.BackupDir = backupDir;
}
/// <summary>
/// Set up internal state for a given scene. Fairly complex code.
/// When this method returns, we've started auto-backup timers, put members in Dictionaries, and created a State object for this scene.
/// </summary>
/// <param name="scene">The scene to look at.</param>
/// <param name="parseDefault">Whether this call is intended to figure out what we consider the "default" config (applied to all regions unless overridden by per-region settings).</param>
/// <returns>An AutoBackupModuleState contains most information you should need to know relevant to auto-backup, as applicable to a single region.</returns>
private AutoBackupModuleState ParseConfig(IScene scene)
{
if(scene == null)
return null;
string sRegionName;
string sRegionLabel;
AutoBackupModuleState state = null;
sRegionName = scene.RegionInfo.RegionName;
sRegionLabel = sRegionName;
// Read the config settings and set variables.
IConfig regionConfig = scene.Config.Configs[sRegionName];
if (regionConfig == null)
return null;
state = new AutoBackupModuleState();
state.Enabled = regionConfig.GetBoolean("AutoBackup", m_defaultState.Enabled);
// Included Option To Skip Assets
state.SkipAssets = regionConfig.GetBoolean("AutoBackupSkipAssets", m_defaultState.SkipAssets);
// How long to keep backup files in days, 0 Disables this feature
state.KeepFilesForDays = regionConfig.GetInt("AutoBackupKeepFilesForDays", m_defaultState.KeepFilesForDays);
// Set file naming algorithm
string stmpNamingType = regionConfig.GetString("AutoBackupNaming", m_defaultState.NamingType.ToString());
NamingType tmpNamingType;
if (stmpNamingType.Equals("Time", StringComparison.CurrentCultureIgnoreCase))
tmpNamingType = NamingType.Time;
else if (stmpNamingType.Equals("Sequential", StringComparison.CurrentCultureIgnoreCase))
tmpNamingType = NamingType.Sequential;
else if (stmpNamingType.Equals("Overwrite", StringComparison.CurrentCultureIgnoreCase))
tmpNamingType = NamingType.Overwrite;
else
{
m_log.Warn("Unknown naming type specified for region " + sRegionLabel + ": " +
stmpNamingType);
tmpNamingType = NamingType.Time;
}
m_defaultState.NamingType = tmpNamingType;
state.Script = regionConfig.GetString("AutoBackupScript", m_defaultState.Script);
string tmpBackupDir = regionConfig.GetString("AutoBackupDir", ".");
// Let's give the user some convenience and auto-mkdir
if (tmpBackupDir != "." && tmpBackupDir != m_defaultState.BackupDir)
{
try
{
DirectoryInfo dirinfo = new DirectoryInfo(state.BackupDir);
if (!dirinfo.Exists)
{
dirinfo.Create();
}
}
catch (Exception e)
{
m_log.Warn(
"[AUTO BACKUP]: BAD NEWS. You won't be able to save backups to directory " +
state.BackupDir +
" because it doesn't exist or there's a permissions issue with it:",
e);
}
}
state.BackupDir = tmpBackupDir;
return state;
}
/// <summary>
/// Helper function for ParseConfig.
/// </summary>
/// <param name="settingName"></param>
/// <param name="defaultValue"></param>
/// <param name="global"></param>
/// <param name="local"></param>
/// <returns></returns>
private bool ResolveBoolean(string settingName, bool defaultValue, IConfig global, IConfig local)
{
if(local != null)
{
return local.GetBoolean(settingName, global.GetBoolean(settingName, defaultValue));
}
else
{
return global.GetBoolean(settingName, defaultValue);
}
}
/// <summary>
/// Called when any auto-backup timer expires. This starts the code path for actually performing a backup.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void HandleElapsed(object sender, ElapsedEventArgs e)
{
if (!m_enabled || m_busy)
return;
m_busy = true;
foreach (IScene scene in m_Scenes)
{
if (!m_enabled)
return;
DoRegionBackup(scene);
}
if (m_enabled)
{
m_masterTimer.Start();
m_busy = false;
}
}
/// <summary>
/// Save an OAR, register for the callback for when it's done, then call the AutoBackupScript (if applicable).
/// </summary>
/// <param name="scene"></param>
private void DoRegionBackup(IScene scene)
{
if (!scene.Ready)
{
// We won't backup a region that isn't operating normally.
m_log.Warn("[AUTO BACKUP]: Not backing up region " + scene.RegionInfo.RegionName +
" because its status is " + scene.RegionStatus);
return;
}
m_busy = true;
AutoBackupModuleState state;
if(!m_states.TryGetValue(scene, out state))
return;
if(state == null || !state.Enabled)
return;
IRegionArchiverModule iram = scene.RequestModuleInterface<IRegionArchiverModule>();
if(iram == null)
return;
string savePath = BuildOarPath(scene.RegionInfo.RegionName,
state.BackupDir,
state.NamingType);
if (savePath == null)
{
m_log.Warn("[AUTO BACKUP]: savePath is null in HandleElapsed");
return;
}
Guid guid = Guid.NewGuid();
m_log.Info("[AUTO BACKUP]: Backing up region " + scene.RegionInfo.RegionName);
// Must pass options, even if dictionary is empty!
Dictionary<string, object> options = new Dictionary<string, object>();
if (state.SkipAssets)
options["noassets"] = true;
iram.ArchiveRegion(savePath, guid, options);
ExecuteScript(state.Script, savePath);
}
// For the given state, remove backup files older than the states KeepFilesForDays property
private void RemoveOldFiles(AutoBackupModuleState state)
{
// 0 Means Disabled, Keep Files Indefinitely
if (state.KeepFilesForDays > 0)
{
string[] files = Directory.GetFiles(state.BackupDir, "*.oar");
DateTime CuttOffDate = DateTime.Now.AddDays(0 - state.KeepFilesForDays);
foreach (string file in files)
{
try
{
FileInfo fi = new FileInfo(file);
if (fi.CreationTime < CuttOffDate)
fi.Delete();
}
catch (Exception Ex)
{
m_log.Error("[AUTO BACKUP]: Error deleting old backup file '" + file + "': " + Ex.Message);
}
}
}
}
/// <summary>This format may turn out to be too unwieldy to keep...
/// Besides, that's what ctimes are for. But then how do I name each file uniquely without using a GUID?
/// Sequential numbers, right? We support those, too!</summary>
private static string GetTimeString()
{
StringWriter sw = new StringWriter();
sw.Write("_");
DateTime now = DateTime.Now;
sw.Write(now.Year);
sw.Write("y_");
sw.Write(now.Month);
sw.Write("M_");
sw.Write(now.Day);
sw.Write("d_");
sw.Write(now.Hour);
sw.Write("h_");
sw.Write(now.Minute);
sw.Write("m_");
sw.Write(now.Second);
sw.Write("s");
sw.Flush();
string output = sw.ToString();
sw.Close();
return output;
}
/// <summary>
/// Run the script or executable specified by the "AutoBackupScript" config setting.
/// Of course this is a security risk if you let anyone modify OpenSim.ini and they want to run some nasty bash script.
/// But there are plenty of other nasty things that can be done with an untrusted OpenSim.ini, such as running high threat level scripting functions.
/// </summary>
/// <param name="scriptName"></param>
/// <param name="savePath"></param>
private static void ExecuteScript(string scriptName, string savePath)
{
// Do nothing if there's no script.
if (scriptName == null || scriptName.Length <= 0)
{
return;
}
try
{
FileInfo fi = new FileInfo(scriptName);
if (fi.Exists)
{
ProcessStartInfo psi = new ProcessStartInfo(scriptName);
psi.Arguments = savePath;
psi.CreateNoWindow = true;
Process proc = Process.Start(psi);
proc.ErrorDataReceived += HandleProcErrorDataReceived;
}
}
catch (Exception e)
{
m_log.Warn(
"Exception encountered when trying to run script for oar backup " + savePath, e);
}
}
/// <summary>
/// Called if a running script process writes to stderr.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void HandleProcErrorDataReceived(object sender, DataReceivedEventArgs e)
{
m_log.Warn("ExecuteScript hook " + ((Process) sender).ProcessName +
" is yacking on stderr: " + e.Data);
}
/// <summary>
/// Determine the next unique filename by number, for "Sequential" AutoBackupNamingType.
/// </summary>
/// <param name="dirName"></param>
/// <param name="regionName"></param>
/// <returns></returns>
private static string GetNextFile(string dirName, string regionName)
{
FileInfo uniqueFile = null;
long biggestExistingFile = GetNextOarFileNumber(dirName, regionName);
biggestExistingFile++;
// We don't want to overwrite the biggest existing file; we want to write to the NEXT biggest.
uniqueFile =
new FileInfo(dirName + Path.DirectorySeparatorChar + regionName + "_" +
biggestExistingFile + ".oar");
return uniqueFile.FullName;
}
/// <summary>
/// Top-level method for creating an absolute path to an OAR backup file based on what naming scheme the user wants.
/// </summary>
/// <param name="regionName">Name of the region to save.</param>
/// <param name="baseDir">Absolute or relative path to the directory where the file should reside.</param>
/// <param name="naming">The naming scheme for the file name.</param>
/// <returns></returns>
private static string BuildOarPath(string regionName, string baseDir, NamingType naming)
{
FileInfo path = null;
switch (naming)
{
case NamingType.Overwrite:
path = new FileInfo(baseDir + Path.DirectorySeparatorChar + regionName + ".oar");
return path.FullName;
case NamingType.Time:
path =
new FileInfo(baseDir + Path.DirectorySeparatorChar + regionName +
GetTimeString() + ".oar");
return path.FullName;
case NamingType.Sequential:
// All codepaths in GetNextFile should return a file name ending in .oar
path = new FileInfo(GetNextFile(baseDir, regionName));
return path.FullName;
default:
m_log.Warn("VERY BAD: Unhandled case element " + naming);
break;
}
return null;
}
/// <summary>
/// Helper function for Sequential file naming type (see BuildOarPath and GetNextFile).
/// </summary>
/// <param name="dirName"></param>
/// <param name="regionName"></param>
/// <returns></returns>
private static long GetNextOarFileNumber(string dirName, string regionName)
{
long retval = 1;
DirectoryInfo di = new DirectoryInfo(dirName);
FileInfo[] fi = di.GetFiles(regionName, SearchOption.TopDirectoryOnly);
Array.Sort(fi, (f1, f2) => StringComparer.CurrentCultureIgnoreCase.Compare(f1.Name, f2.Name));
if (fi.LongLength > 0)
{
long subtract = 1L;
bool worked = false;
Regex reg = new Regex(regionName + "_([0-9])+" + ".oar");
while (!worked && subtract <= fi.LongLength)
{
// Pick the file with the last natural ordering
string biggestFileName = fi[fi.LongLength - subtract].Name;
MatchCollection matches = reg.Matches(biggestFileName);
long l = 1;
if (matches.Count > 0 && matches[0].Groups.Count > 0)
{
try
{
long.TryParse(matches[0].Groups[1].Value, out l);
retval = l;
worked = true;
}
catch (FormatException fe)
{
m_log.Warn(
"[AUTO BACKUP]: Error: Can't parse long value from file name to determine next OAR backup file number!",
fe);
subtract++;
}
}
else
{
subtract++;
}
}
}
return retval;
}
}
}
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