Release Announcements
=====================
-This is the first release candidate of Samba 4.4. This is *not*
+This is the first preview release of Samba 4.9. 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 4.4 will be the next version of the Samba suite.
+Samba 4.9 will be the next version of the Samba suite.
UPGRADING
=========
-Nothing special.
-
NEW FEATURES/CHANGES
====================
-Asynchronous flush requests
----------------------------
-
-Flush requests from SMB2/3 clients are handled asynchronously and do
-not block the processing of other requests. Note that 'strict sync'
-has to be set to 'yes' for Samba to honor flush requests from SMB
-clients.
-
-s3: smbd
---------
-
-Remove '--with-aio-support' configure option. We no longer would ever prefer
-POSIX-RT aio, use pthread_aio instead.
-
-samba-tool sites
-----------------
-
-The 'samba-tool sites' subcommand can now be run against another server by
-specifying an LDB URL using the '-H' option and not against the local database
-only (which is still the default when no URL is given).
-
-samba-tool domain demote
-------------------------
-
-Add '--remove-other-dead-server' option to 'samba-tool domain demote'
-subcommand. The new version of this tool now can remove another DC that is
-itself offline. The '--remove-other-dead-server' removes as many references
-to the DC as possible.
-
-samba-tool drs clone-dc-database
---------------------------------
-
-Replicate an initial clone of domain, but do not join it.
-This is developed for debugging purposes, but not for setting up another DC.
-
-pdbedit
--------
-
-Add '--set-nt-hash' option to pdbedit to update user password from nt-hash
-hexstring. 'pdbedit -vw' shows also password hashes.
-
-smbstatus
----------
-
-'smbstatus' was enhanced to show the state of signing and encryption for
-sessions and shares.
-
-s4-rpc_server
--------------
-
-Add a GnuTLS based backupkey implementation.
-
-ntlm_auth
----------
-
-Using the '--offline-logon' enables ntlm_auth to use cached passwords when the
-DC is offline.
-
-Allow '--password' force a local password check for ntlm-server-1 mode.
-vfs_offline
------------
-
-A new VFS module called vfs_offline has been added to mark all files in the
-share as offline. It can be useful for shares mounted on top of a remote file
-system (either through a samba VFS module or via FUSE).
-
-KCC
----
-
-The Samba KCC has been improved, but is still disabled by default.
-
-DNS
----
-
-There were several improvements concerning the Samba DNS server.
-
-Active Directory
-----------------
-
-There were some improvements in the Active Directory area.
-
-WINS nsswitch module
---------------------
-
-The WINS nsswitch module has been rewritten to address memory issues and to
-simplify the code. The module now uses libwbclient to do WINS queries. This
-means that winbind needs to be running in order to resolve WINS names using
-the nss_wins module. This does not affect smbd.
-
-CTDB changes
-------------
+net ads setspn
+---------------
-* CTDB now uses a newly implemented parallel database recovery scheme
- that avoids deadlocks with smbd.
+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.
- In certain circumstances CTDB and smbd could deadlock. The new
- recovery implementation avoid this. It also provides improved
- recovery performance.
+The format of the command is:
-* All files are now installed into and referred to by the paths
- configured at build time. Therefore, CTDB will now work properly
- when installed into the default location at /usr/local.
+net ads setspn list [machine]
+net ads setspn [add | delete ] SPN [machine]
-* Public CTDB header files are no longer installed, since Samba and
- CTDB are built from within the same source tree.
+'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.
-* CTDB_DBDIR can now be set to tmpfs[:<tmpfs-options>]
+The format of a Windows SPN is
+ 'serviceclass/host:port/servicename' (servicename and port are optional)
- This will cause volatile TDBs to be located in a tmpfs. This can
- help to avoid performance problems associated with contention on the
- disk where volatile TDBs are usually stored. See ctdbd.conf(5) for
- more details.
+serviceclass/host is generally sufficient to specify a host based service.
-* Configuration variable CTDB_NATGW_SLAVE_ONLY is no longer used.
- Instead, nodes should be annotated with the "slave-only" option in
- the CTDB NAT gateway nodes file. This file must be consistent
- across nodes in a NAT gateway group. See ctdbd.conf(5) for more
- details.
+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.
-* New event script 05.system allows various system resources to be
- monitored
+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.
- This can be helpful for explaining poor performance or unexpected
- behaviour. New configuration variables are
- CTDB_MONITOR_FILESYSTEM_USAGE, CTDB_MONITOR_MEMORY_USAGE and
- CTDB_MONITOR_SWAP_USAGE. Default values cause warnings to be
- logged. See the SYSTEM RESOURCE MONITORING CONFIGURATION in
- ctdbd.conf(5) for more information.
+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.
- The memory, swap and filesystem usage monitoring previously found in
- 00.ctdb and 40.fs_use is no longer available. Therefore,
- configuration variables CTDB_CHECK_FS_USE, CTDB_MONITOR_FREE_MEMORY,
- CTDB_MONITOR_FREE_MEMORY_WARN and CTDB_CHECK_SWAP_IS_NOT_USED are
- now ignored.
+Local authorization plugin for MIT Kerberos
+-------------------------------------------
-* The 62.cnfs eventscript has been removed. To get a similar effect
- just do something like this:
+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.
- mmaddcallback ctdb-disable-on-quorumLoss \
- --command /usr/bin/ctdb \
- --event quorumLoss --parms "disable"
+Database audit support
+----------------------
- mmaddcallback ctdb-enable-on-quorumReached \
- --command /usr/bin/ctdb \
- --event quorumReached --parms "enable"
+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.
-* The CTDB tunable parameter EventScriptTimeoutCount has been renamed
- to MonitorTimeoutCount
+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.
- It has only ever been used to limit timed-out monitor events.
+Password change audit support
+-----------------------------
- Configurations containing CTDB_SET_EventScriptTimeoutCount=<n> will
- cause CTDB to fail at startup. Useful messages will be logged.
+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.
-* The commandline option "-n all" to CTDB tool has been removed.
+Group membership change audit support
+-------------------------------------
- The option was not uniformly implemented for all the commands.
- Instead of command "ctdb ip -n all", use "ctdb ip all".
+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.
-* All CTDB current manual pages are now correctly installed
+Log Authentication duration
+---------------------------
+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
+-------------------------------
+
+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.
+
+Dynamic DNS record scavenging support
+-------------------------------------
+
+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.
+
+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.
+
+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".
REMOVED FEATURES
================
-Public headers
---------------
-Several public headers are not installed any longer. They are made for internal
-use only. More public headers will very likely be removed in future releases.
-The following headers are not installed any longer:
-dlinklist.h, gen_ndr/epmapper.h, gen_ndr/mgmt.h, gen_ndr/ndr_atsvc_c.h,
-gen_ndr/ndr_epmapper_c.h, gen_ndr/ndr_epmapper.h, gen_ndr/ndr_mgmt_c.h,
-gen_ndr/ndr_mgmt.h,gensec.h, ldap_errors.h, ldap_message.h, ldap_ndr.h,
-ldap-util.h, pytalloc.h, read_smb.h, registry.h, roles.h, samba_util.h,
-smb2_constants.h, smb2_create_blob.h, smb2.h, smb2_lease.h, smb2_signing.h,
-smb_cli.h, smb_cliraw.h, smb_common.h, smb_composite.h, smb_constants.h,
-smb_raw.h, smb_raw_interfaces.h, smb_raw_signing.h, smb_raw_trans2.h,
-smb_request.h, smb_seal.h, smb_signing.h, smb_unix_ext.h, smb_util.h,
-torture.h, tstream_smbXcli_np.h.
+smb.conf changes
+================
-vfs_smb_traffic_analyzer
-------------------------
+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.
-The SMB traffic analyzer VFS module has been removed, because it is not
-maintained any longer and not widely used.
+ Parameter Name Description Default
+ -------------- ----------- -------
+ map readonly Default changed no
+ store dos attributes Default changed yes
+ ea support Default changed yes
-vfs_scannedonly
----------------
-
-The scannedonly VFS module has been removed, because it is not maintained
-any longer.
+VFS interface changes
+=====================
-smb.conf changes
-----------------
+The VFS ABI interface version has changed to 39. Function changes
+are:
- Parameter Name Description Default
- -------------- ----------- -------
- aio max threads New 100
- ldap page size Changed default 1000
+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.
+Any external VFS modules will need to be updated to match these
+changes in order to work with 4.9.x.
KNOWN ISSUES
============
-Currently none.
+https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.9#Release_blocking_bugs
+
#######################################
Reporting bugs & Development Discussion
git.samba.org / samba.git / blobdiff