Release Announcements
=====================
-This is the first preview release of Samba 4.6. This is *not*
+This is the first preview release of Samba 4.11. 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 4.6 will be the next version of the Samba suite.
+Samba 4.11 will be the next version of the Samba suite.
UPGRADING
=========
-vfs_fruit option "fruit:resource" spelling correction
------------------------------------------------------
-Due to a spelling error in the vfs_fruit option parsing for the "fruit:resource"
-option, users who have set this option in their smb.conf were still using the
-default setting "fruit:resource = file" as the parser was looking for the string
-"fruit:ressource" (two "s").
+NEW FEATURES/CHANGES
+====================
-After upgrading to this Samba version 4.6, you MUST either remove the option
-from your smb.conf or set it to the default "fruit:resource = file", otherwise
-your macOS clients will not be able to access the resource fork data.
+Default samba process model
+---------------------------
-This version Samba 4.6 accepts both the correct and incorrect spelling, but the
-next Samba version 4.7 will not accept the wrong spelling.
+The default for the --model argument passed to the samba executable has changed
+from 'standard' to 'prefork'. This means a difference in the number of samba
+child processes that are created to handle client connections. The previous
+default would create a separate process for every LDAP or NETLOGON client
+connection. For a network with a lot of persistent client connections, this
+could result in significant memory overhead. Now, with the new default of
+'prefork', the LDAP, NETLOGON, and KDC services will create a fixed number of
+worker processes at startup and share the client connections amongst these
+workers. The number of worker processes can be configured by the 'prefork
+children' setting in the smb.conf (the default is 4).
-Users who were using the wrong spelling "ressource" with two "s" can keep the
-setting, but are advised to switch to the correct spelling.
+Authentication Logging.
+-----------------------
-ID Mapping
-----------
-We discovered that the majority of users have an invalid or incorrect
-ID mapping configuration. We implemented checks in the 'testparm' tool to
-validate the ID mapping configuration. You should run it and check if it prints
-any warnings or errors after upgrading! If it does you should fix them. See the
-'IDENTITY MAPPING CONSIDERATIONS' section in the smb.conf manpage.
-There are some ID mapping backends which are not allowed to be used for the
-default backend. Winbind will no longer start if an invalid backend is
-configured as the default backend.
+Winbind now logs PAM_AUTH and NTLM_AUTH events, a new attribute "logonId" has
+been added to the Authentication JSON log messages. This contains a random
+logon id that is generated for each PAM_AUTH and NTLM_AUTH request and is passed
+to SamLogon, linking the windbind and SamLogon requests.
-To avoid problems in future we advise all users to run 'testparm' after
-changing the smb.conf file!
+The serviceDescription of the messages is set to "winbind", the authDescription
+is set to one of:
+ "PASSDB, <command>, <pid>"
+ "PAM_AUTH, <command>, <pid>"
+ "NTLM_AUTH, <command>, <pid>"
+where:
+ <command> is the name of the command makinmg the winbind request i.e. wbinfo
+ <pid> is the process id of the requesting process.
+The version of the JSON Authentication messages has been changed to 1.2 from 1.1
-NEW FEATURES/CHANGES
-====================
+LDAP referrals
+--------------
-Kerberos client encryption types
---------------------------------
-Some parts of Samba (most notably winbindd) perform Kerberos client
-operations based on a Samba-generated krb5.conf file. A new
-parameter, "kerberos encryption types" allows configuring the
-encryption types set in this file, thereby allowing the user to
-enforce strong or legacy encryption in Kerberos exchanges.
-
-The default value of "all" is compatible with previous behavior, allowing
-all encryption algorithms to be negotiated. Setting the parameter to "strong"
-only allows AES-based algorithms to be negotiated. Setting the parameter to
-"legacy" allows only RC4-HMAC-MD5 - the legacy algorithm for Active Directory.
-This can solves some corner cases of mixed environments with Server 2003R2 and
-newer DCs.
-
-Printing
---------
-Support for uploading printer drivers from newer Windows clients (Windows 10)
-has been added until our implementation of [MS-PAR] protocol is ready.
-Several issues with uploading different printing drivers have been addressed.
-
-The OS Version for the printing server has been increased to announce
-Windows Server 2003 R2 SP2. If a driver needs a newer version then you should
-check the smb.conf manpage for details.
-
-new option for owner inheritance
+The scheme of returned LDAP referrals now reflects the scheme of the original
+request, i.e. referrals received via ldap are prefixed with "ldap://"
+and those over ldaps are prefixed with "ldaps://"
+
+Previously all referrals were prefixed with "ldap://"
+
+Bind9 logging
+-------------
+
+It is now possible to log the duration of DNS operations performed by Bind9
+This should aid future diagnosis of performance issues, and could be used to
+monitor DNS performance. The logging is enabled by setting log level to
+"dns:10" in smb.conf
+
+The logs are currently Human readable text only, i.e. no JSON formatted output.
+
+Log lines are of the form:
+
+ <function>: DNS timing: result: [<result>] duration: (<duration>)
+ zone: [<zone>] name: [<name>] data: [<data>]
+
+ durations are in microseconds.
+
+Default schema updated to 2012_R2
+---------------------------------
+
+Default AD schema changed from 2008_R2 to 2012_R2. 2012_R2 functional level
+is not yet available. Older schemas can be used by provisioning with the
+'--base-schema' argument. Existing installations can be updated with the
+samba-tool command "domain schemaupgrade".
+
+Samba's replication code has also been improved to handle replication
+with the 2012 schema (the core of this replication fix has also been
+backported to 4.9.11 and will be in a 4.10.x release).
+
+GnuTLS 3.2 required
+-------------------
+
+Samba is making efforts to remove in-tree cryptographic functionality,
+and to instead rely on externally maintained libraries. To this end,
+Samba has chosen GnuTLS as our standard cryptographic provider.
+
+Samba now requires GnuTLS 3.2 to be installed (including development
+headers at build time) for all configurations, not just the Samba AD
+DC.
+
+NOTE WELL: The use of GnuTLS means that Samba will honour the
+system-wide 'FIPS mode' (a reference to the US FIPS-140 cryptographic
+standard) and so will not operate in many still common situations if
+this system-wide parameter is in effect, as many of our protocols rely
+on outdated cryptography.
+
+A future Samba version will mitigate this to some extent where good
+cryptography effectively wraps bad cryptography, but for now that above
+applies.
+
+samba-tool improvements
+-----------------------
+
+A new "samba-tool contact" command has been added to allow the
+command-line manipulation of contacts, as used for address book
+lookups in LDAP.
+
+The "samba-tool [user|group|computer|group|contact] edit" command has been
+improved to operate more pleasantly on international character sets.
+
+100,000 USER and LARGER Samba AD DOMAINS
+========================================
+
+Extensive efforts have been made to optimise Samba for use in
+organisations (for example) targeting 100,000 users, plus 120,000
+computer objects, as well as large number of group memberships.
+
+Many of the specific efforts are detailed below, but the net results
+is to remove barriers to significantly larger Samba deployments
+compared to previous releases.
+
+Reindex performance improvements
--------------------------------
-The "inherit owner" smb.conf parameter instructs smbd to set the
-owner of files to be the same as the parent directory's owner.
-Up until now, this parameter could be set to "yes" or "no".
-A new option, "unix only", enables this feature only for the UNIX owner
-of the file, not affecting the SID owner in the Windows NT ACL of the
-file. This can be used to emulate something very similar to folder quotas.
-
-Multi-process Netlogon support
-------------------------------
-
-The Netlogon server in the Samba AD DC can now run as multiple
-processes. The Netlogon server is a part of the AD DC that handles
-NTLM authentication on behalf of domain members, including file
-servers, NTLM-authenticated web servers and 802.1x gateways. The
-previous restriction to running as a single process has been removed,
-and it will now run in the same process model as the rest of the
-'samba' binary.
-
-As part of this change, the NETLOGON service will now run on a distinct
-TCP port, rather than being shared with all other RPC services (LSA,
-SAMR, DRSUAPI etc).
-
-new options for controlling TCP ports used for RPC services
------------------------------------------------------------
-
-The new 'rpc server port' option controls the default port used for
-RPC services other than Netlogon. The Netlogon server honours instead
-the 'rpc server port:netlogon' option. The default value for both
-these options is the first available port including or after 1024.
-
-Improve AD performance and replication improvements
----------------------------------------------------
-
-Samba's LDB and replication code continues to improve, particularly in
-respect to the handling of large numbers of linked attributes. We now
-respect an 'uptodateness vector' which will dramatically reduce the
-over-replication of links from new DCs. We have also made the parsing
-of on-disk linked attributes much more efficient.
-
-DNS improvements
+
+The performance of samba-tool dbcheck --reindex has been improved,
+especially for large domains.
+
+join performance improvements
+-----------------------------
+
+The performance of samba-tool domain join has been improved,
+especially for large domains.
+
+LDAP Server memory improvements
+-------------------------------
+
+The LDAP server has improved memory efficiency, ensuring that large
+LDAP responses (for example a search for all objects) is not copied
+multiple times into memory.
+
+Setting lmdb map size
+---------------------
+
+It is now possible to set the lmdb map size (The maximum permitted
+size for the database). "samba-tool" now accepts the
+"--backend-store-size" i.e. --backend-store-size=4Gb. If not
+specified it defaults to 8Gb.
+
+This option is avaiable for the following sub commands:
+ * domain provision
+ * domain join
+ * domain dcpromo
+ * drs clone-dc-database
+
+LDB "batch_mode"
----------------
-The samba-tool dns subcommand is now much more robust and can delete
-records in a number of situations where it was not possible to do so
-in the past.
+To improve performance during batch operations i.e. joins, ldb now
+accepts a "batch_mode" option. However to prevent any index or
+database inconsistencies if an operation fails, the entire transaction
+will be aborted at commit.
+
+New LDB pack format
+-------------------
-On the server side, DNS names are now more strictly validated.
+On first use (startup of 'samba' or the first transaction write)
+Samba's sam.ldb will be updated to a new more efficient pack format.
+This will take a few moments.
+
+New LDB <= and >= index mode to improve replication performance
+---------------------------------------------------------------
+
+As well as a new pack format, Samba's sam.ldb uses a new index format
+allowing Samba to efficiently select objects changed since the last
+replication cycle. This in turn improves performance during
+replication of large domains.
+
+Improvements to ldb search performance
+--------------------------------------
+
+Search performance on large LDB databases has been improved by
+reducing memory allocations made on each object.
+
+Improvements to subtree rename performance
+------------------------------------------
+
+Improvements have been made to Samba's handling of subtree renames,
+for example of containers and organisational units, however large
+renames are still not recommended.
CTDB changes
-------------
+============
+
+* nfs-linux-kernel-callout now defaults to using systemd service names
-* "ctdb event" is a new top-level command for interacting with event scripts
+ The Red Hat service names continue to be the default.
- "ctdb event status" replaces "ctdb scriptstatus" - the latter is
- maintained for backward compatibility but the output format has been
- cleaned up
+ Other distributions should patch this file when packaging it.
- "ctdb event run" replaces "ctdb eventscript"
+* The onnode -o option has been removed
- "ctdb event script enable" replaces "ctdb enablescript"
+* ctdbd logs when it is using more than 90% of a CPU thread
- "ctdb event script disable" replaces "ctdb disablescript"
+ ctdbd is single threaded, so can become saturated if it uses the
+ full capacity of a CPU thread. To help detect this situation, ctdbd
+ now logs messages when CPU utilisation exceeds 90%. Each change in
+ CPU utilisation over 90% is logged. A message is also logged when
+ CPU utilisation drops below the 90% threshold.
- The new command "ctdb event script list" lists event scripts.
+* Script configuration variable CTDB_MONITOR_SWAP_USAGE has been removed
-* CTDB's back-end for running event scripts has been replaced by a
- separate, long-running daemon ctdbd_eventd.
+ 05.system.script now monitors total memory (i.e. physical memory +
+ swap) utilisation using the existing CTDB_MONITOR_MEMORY_USAGE
+ script configuration variable.
-* Running ctdb interactively will log to stderr
-* CTDB logs now include process id for each process
+REMOVED FEATURES
+================
-* CTDB tags log messages differently. Changes include:
+Web server
+----------
- ctdb-recoverd: Messages from CTDB's recovery daemon
- ctdb-recovery: Messages from CTDB database recovery
- ctdb-eventd: Messages from CTDB's event daemon
- ctdb-takeover: Messgaes from CTDB's public IP takeover subsystem
+As a leftover from work related to the Samba Web Administration Tool (SWAT),
+Samba still supported a Python WSGI web server (which could still be turned on
+from the 'server services' smb.conf parameter). This service was unused and has
+now been removed from Samba.
-* The mapping between symbolic and numeric debug levels has changed
- Configurations containing numeric debug levels should be updated.
- Symbolic debug levels are recommended. See the DEBUG LEVEL section
- of ctdb(7) for details.
+samba-tool join subdommain
+--------------------------
-* Tunable IPAllocAlgorithm replaces LCP2PublicIPs, DeterministicIPs
+The subdommain role has been removed from the join command. This option did
+not work and has no tests.
- See ctdb-tunables(7) for details
-* CTDB's configuration tunables should be consistently set across a cluster
+Python2 support
+---------------
- This has always been the cases for most tunables but this fact is
- now documented.
+Samba 4.11 will not have any runtime support for Python 2.
-* CTDB ships with recovery lock helper call-outs for etcd and Ceph RADOS
+If you are building Samba using the '--disable-python' option
+(i.e. you're excluding all the run-time Python support), then this
+will continue to work on a system that supports either python2 or
+python3.
- To build/install these, use the --enable-etcd-reclock and
- --enable-ceph-reclock configure options.
+To build Samba with python2 you *must* set the 'PYTHON' environment
+variable for both the 'configure' and 'make' steps, i.e.
+ 'PYTHON=python2 ./configure'
+ 'PYTHON=python2 make'
+This will override the python3 default.
+Except for this specific build-time use of python2, Samba now requires
+Python 3.4 as a minimum.
smb.conf changes
================
- Parameter Name Description Default
- -------------- ----------- -------
- kerberos encryption types New all
- inherit owner New option
- fruit:resource Spelling correction
- lsa over netlogon New (deprecated) no
- rpc server port New 0
+ Parameter Name Description Default
+ -------------- ----------- -------
+
+ web port Removed
+ fruit:zero_file_id Changed default False
KNOWN ISSUES
============
-Currently none.
+https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.11#Release_blocking_bugs
+
#######################################
Reporting bugs & Development Discussion
git.samba.org / samba.git / blobdiff