Release Announcements
=====================
-This is the first preview release of Samba 4.9. This is *not*
+This is the first preview release of Samba 4.10. This is *not*
intended for production environments and is designed for testing
purposes only. Please report any defects via the Samba bug reporting
system at https://bugzilla.samba.org/.
-Samba 4.9 will be the next version of the Samba suite.
+Samba 4.10 will be the next version of the Samba suite.
UPGRADING
NEW FEATURES/CHANGES
====================
+GPO Improvements
+----------------
-net ads setspn
----------------
+A new 'samba-tool gpo export' command has been added that can export a
+set of Group Policy Objects from a domain in a generalised XML format.
-There is a new 'net ads setspn' sub command for managing Windows SPN(s)
-on the AD. This command aims to give the basic functionaility that is
-provided on windows by 'setspn.exe' e.g. ability to add, delete and list
-Windows SPN(s) stored in a Windows AD Computer object.
+A corresponding 'samba-tool gpo restore' command has been added to
+rebuild the Group Policy Objects from the XML after generalization.
+(The administrator needs to correct the values of XML entities between
+the backup and restore to account for the change in domain).
-The format of the command is:
+kdc prefork
+-----------
-net ads setspn list [machine]
-net ads setspn [add | delete ] SPN [machine]
+The KDC now supports the pre-fork process model and worker processes will be
+forked for the KDC when the pre-fork process model is selected for samba.
-'machine' is the name of the computer account on the AD that is to be managed.
-If 'machine' is not specified the name of the 'client' running the command
-is used instead.
+prefork 'prefork children'
+--------------------------
-The format of a Windows SPN is
- 'serviceclass/host:port/servicename' (servicename and port are optional)
+The default value for this smdb.conf parameter has been increased from 1 to
+4.
-serviceclass/host is generally sufficient to specify a host based service.
+netlogon prefork
+----------------
-net ads keytab changes
-----------------------
-net ads keytab add no longer attempts to convert the passed serviceclass
-(e.g. nfs, html etc.) into a Windows SPN which is added to the Windows AD
-computer object. By default just the keytab file is modified.
-
-A new keytab subcommand 'add_update_ads' has been added to preserve the
-legacy behaviour. However the new 'net ads setspn add' subcommand should
-really be used instead.
-
-net ads keytab create no longer tries to generate SPN(s) from existing
-entries in a keytab file. If it is required to add Windows SPN(s) then
-'net ads setspn add' should be used instead.
-
-Local authorization plugin for MIT Kerberos
--------------------------------------------
-
-This plugin controls the relationship between Kerberos principals and AD
-accounts through winbind. The module receives the Kerberos principal and the
-local account name as inputs and can then check if they match. This can resolve
-issues with canonicalized names returned by Kerberos within AD. If the user
-tries to log in as 'alice', but the samAccountName is set to ALICE (uppercase),
-Kerberos would return ALICE as the username. Kerberos would not be able to map
-'alice' to 'ALICE' in this case and auth would fail. With this plugin account
-names can be correctly mapped. This only applies to GSSAPI authentication,
-not for the geting the initial ticket granting ticket.
-
-Database audit support
-----------------------
-
-Changes to the Samba AD's sam.ldb database are now logged to Samba's debug log
-under the "dsdb_audit" debug class and "dsdb_json_audit" for JSON formatted log
-entries.
-
-Transaction commits and roll backs are now logged to Samba's debug logs under
-the "dsdb_transaction_audit" debug class and "dsdb_transaction_json_audit" for
-JSON formatted log entries.
-
-Password change audit support
------------------------------
+DCERPC now supports pre-forked NETLOGON processes. The netlogon processes are
+pre-forked when the prefork process model is selected for samba.
-Password changes in the AD DC are now logged to Samba's debug logs under the
-"dsdb_password_audit" debug class and "dsdb_password_json_audit" for JSON
-formatted log entries.
-
-Group membership change audit support
--------------------------------------
+Offline domain backups
+----------------------
-Group membership changes on the AD DC are now logged to
-Samba's debug log under the "dsdb_group_audit" debug class and
-"dsdb_group_json_audit" for JSON formatted log entries.
+The 'samba-tool domain backup' command has been extended with a new 'offline'
+option. This safely creates a backup of the local DC's database directly from
+disk. The main benefits of an offline backup are it's quicker, it stores more
+database details (for forensic purposes), and the samba process does not have
+to be running when the backup is made. Refer to the samba-tool help for more
+details on using this command.
-Log Authentication duration
+Group membership statistics
---------------------------
-For NTLM and Kerberos KDC authentication, the authentication duration is now
-logged. Note that the duration is only included in the JSON formatted log
-entries.
-
-New Experimental LMDB LDB backend
----------------------------------
-
-A new experimental LDB backend using LMBD is now available. This allows
-databases larger than 4Gb (Currently the limit is set to 6Gb, but this will be
-increased in a future release). To enable lmdb, provision or join a domain using
-the --backend-store=mdb option.
-
-This requires that a version of lmdb greater than 0.9.16 is installed and that
-samba has not been built with the --without-ldb-lmdb option.
-
-Please note this is an experimental feature and is not recommended for
-production deployments.
-
-Password Settings Objects
--------------------------
-Support has been added for Password Settings Objects (PSOs). This AD feature is
-also known as Fine-Grained Password Policies (FGPP).
-
-PSOs allow AD administrators to override the domain password policy settings
-for specific users, or groups of users. For example, PSOs can force certain
-users to have longer password lengths, or relax the complexity constraints for
-other users, and so on. PSOs can be applied to groups or to individual users.
-When multiple PSOs apply to the same user, essentially the PSO with the best
-precedence takes effect.
-
-PSOs can be configured and applied to users/groups using the 'samba-tool domain
-passwordsettings pso' set of commands.
-
-Domain backup and restore
--------------------------
-A new samba-tool command has been added that allows administrators to create a
-backup-file of their domain DB. In the event of a catastrophic failure of the
-domain, this backup-file can be used to restore Samba services.
-
-The new 'samba-tool domain backup online' command takes a snapshot of the
-domain DB from a given DC. In the event of a catastrophic DB failure, all DCs
-in the domain should be taken offline, and the backup-file can then be used to
-recreate a fresh new DC, using the 'samba-tool domain backup restore' command.
-Once the backed-up domain DB has been restored on the new DC, other DCs can
-then subsequently be joined to the new DC, in order to repopulate the Samba
-network.
-
-Domain rename tool
-------------------
-Basic support has been added for renaming a Samba domain. The rename feature is
-designed for the following cases:
-1). Running a temporary alternate domain, in the event of a catastrophic
-failure of the regular domain. Using a completely different domain name and
-realm means that the original domain and the renamed domain can both run at the
-same time, without interfering with each other. This is an advantage over
-creating a regular 'online' backup - it means the renamed/alternate domain can
-provide core Samba network services, while trouble-shooting the fault on the
-original domain can be done in parallel.
-2). Creating a realistic lab domain or pre-production domain for testing.
-
-Note that the renamed tool is currently not intended to support a long-term
-rename of the production domain. Currently renaming the GPOs is not supported
-and would need to be done manually.
-
-The domain rename is done in two steps: first, the 'samba-tool domain backup
-rename' command will clone the domain DB, renaming it in the process, and
-producing a backup-file. Then, the 'samba-tool domain backup restore' command
-takes the backup-file and restores the renamed DB to disk on a fresh DC.
-
-New samba-tool options for diagnosing DRS replication issues
-------------------------------------------------------------
-
-The 'samba-tool drs showrepl' command has two new options controlling
-the output. With --summary, the command says very little when DRS
-replication is working well. With --json, JSON is produced. These
-options are intended for human and machine audiences, respectively.
-
-The 'samba-tool visualize uptodateness' visualizes replication lag as
-a heat-map matrix based on the DRS uptodateness vectors. This will
-show you if (but not why) changes are failing to replicate to some DCs.
-
-Automatic site coverage and GetDCName improvements
---------------------------------------------------
-
-Samba's AD DC now automatically claims otherwise empty sites based on
-which DC is the nearest in the replication topology.
-
-This, combined with efforts to correctly identify the client side in
-the GetDCName Netlogon call will improve service to sites without a
-local DC.
-
-Improved samba-tool computer command
-------------------------------------
-
-The 'samba-tool computer' command allow manipulation of computer
-accounts including creating a new computer and resetting the password.
-This allows an 'offline join' of a member server or workstation to the
-Samba AD domain.
-
-Samba performance tool now operates against Microsoft Windows AD
-----------------------------------------------------------------
-
-The Samba AD performance testing tool traffic_reply can now operate
-against a Windows based AD domain. Previously it only operated
-correctly against Samba.
-
-DNS entries are now cleaned up during DC demote
------------------------------------------------
-
-DNS records are now cleaned up as part of the 'samba-tool domain
-demote' including both the default and --remove-other-dead-server
-modes.
-
-Additionally DNS records can be automatically cleaned up for a given
-name with the 'samba-tool dns cleanup' command, which aids in cleaning
-up partially removed DCs.
-
-Samba now tested with CI GitLab
--------------------------------
+A new 'samba-tool group stats' command has been added. This provides summary
+information about how the users are spread across groups in your domain.
+The 'samba-tool group list --verbose' command has also been updated to include
+the number of users in each group.
-Samba developers now have pre-commit testing available in GitLab,
-giving reviewers confidence that the submitted patches pass a full CI
-before being submitted to the Samba Team's own autobuild system.
+prefork process restart
+-----------------------
-Dynamic DNS record scavenging support
--------------------------------------
+The pre-fork process model now restarts failed processes. The delay between
+restart attempts is controlled by the "prefork backoff increment" (default = 10)
+and "prefork maximum backoff" (default = 120) smbd.conf parameters. A linear
+back off strategy is used with "prefork backoff increment" added to the
+delay between restart attempts up until it reaches "prefork maximum backoff".
-It is now possible to enable scavenging of DNS Zones to remove DNS
-records that were dynamically created and have not been touched in
-some time.
+Using the default sequence the restart delays (in seconds) are:
+ 0, 10, 20, ..., 120, 120, ...
-This support should however only be enabled on new zones or new
-installations. Sadly old Samba versions suffer from BUG 12451 and
-mark dynamic DNS records as static and static records as dynamic.
-While a dbcheck rule may be able to find these in the future,
-currently a reliable test has not been devised.
+standard process model
+----------------------
-Finally, there is not currently a command-line tool to enable this
-feature, currently it should be enabled from the DNS Manager tool from
-Windows. Also the feature needs to have been enabled by setting the smb.conf
-parameter "dns zone scavenging = yes".
+When using the standard process model samba forks a new process to handle ldap
+and netlogon connections. Samba now honours the 'max smbd processes' smb.conf
+parameter. The default value of 0, indicates there is no limit. The limit
+is applied individually to netlogon and ldap. When the process limit is
+exceeded Samba drops new connections immediately.
REMOVED FEATURES
================
+MIT Kerberos build of the AD DC
+-------------------------------
+While not removed, the MIT Kerberos build of the Samba AD DC is still
+considered experimental. Because Samba will not issue security
+patches for this configuration, such builds now require the explicit
+configure option: --with-experimental-mit-ad-dc
-smb.conf changes
-================
-
-As the most popular Samba install platforms (Linux and FreeBSD) both
-support extended attributes by default, the parameters "map readonly",
-"store dos attributes" and "ea support" have had their defaults changed
-to allow better Windows fileserver compatibility in a default install.
-
- Parameter Name Description Default
- -------------- ----------- -------
- map readonly Default changed no
- store dos attributes Default changed yes
- ea support Default changed yes
+For further details see
+https://wiki.samba.org/index.php/Running_a_Samba_AD_DC_with_MIT_Kerberos_KDC
-VFS interface changes
-=====================
+samba_backup
+------------
-The VFS ABI interface version has changed to 39. Function changes
-are:
+The samba_backup script has been removed. This has now been replaced by the
+'samba-tool domain backup offline' command.
-SMB_VFS_FSYNC: Removed: Only async versions are used.
-SMB_VFS_READ: Removed: Only PREAD or async versions are used.
-SMB_VFS_WRITE: Removed: Only PWRITE or async versions are used.
-SMB_VFS_CHMOD_ACL: Removed: Only CHMOD is used.
-SMB_VFS_FCHMOD_ACL: Removed: Only FCHMOD is used.
+smb.conf changes
+================
-Any external VFS modules will need to be updated to match these
-changes in order to work with 4.9.x.
+ Parameter Name Description Default
+ -------------- ----------- -------
+ prefork backoff increment Delay added to process restart 10 (seconds)
+ between attempts.
+ prefork maximum backoff Maximum delay for process between 120 (seconds)
+ process restart attempts
+ smbd search ask sharemode Name changed, old name was
+ "smbd:search ask sharemode"
+ smbd async dosmode Name changed, old name was
+ "smbd:async dosmode"
+ smbd max async dosmode Name changed, old name was
+ "smbd:max async dosmode"
+ smbd getinfo ask sharemode New: similar to "smbd search ask yes
+ sharemode" but for SMB getinfo
KNOWN ISSUES
============
-https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.9#Release_blocking_bugs
+https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.10#Release_blocking_bugs
#######################################
git.samba.org / amitay / samba.git / blobdiff