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183 lines
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ReStructuredText
183 lines
6.4 KiB
ReStructuredText
=========================
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Salt 0.10.3 Release Notes
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=========================
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:release: 2012-09-30
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The latest taste of Salt has come, this release has many fixes and feature
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additions. Modifications have been made to make ZeroMQ connections more
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reliable, the beginning of the ACL system is in place, a new command line
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parsing system has been added, dynamic module distribution has become more
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environment aware, the new `master_finger` option and many more!
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Major Features
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==============
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ACL System
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----------
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The new ACL system has been introduced. The ACL system allows for system users
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other than root to execute salt commands. Users can be allowed to execute
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specific commands in the same way that minions are opened up to the peer
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system.
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The configuration value to open up the ACL system is called ``client_acl``
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and is configured like so:
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.. code-block:: yaml
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client_acl:
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fred:
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- test..*
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- pkg.list_pkgs
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Where `fred` is allowed access to functions in the test module and to the
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``pkg.list_pkgs`` function.
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Master Finger Option
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--------------------
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The `master_finger` option has been added to improve the security of minion
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provisioning. The `master_finger` option allows for the fingerprint of the
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master public key to be set in the configuration file to double verify that the
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master is valid. This option was added in response to a motivation to
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pre-authenticate the master when provisioning new minions to help prevent
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man in the middle attacks in some situations.
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Salt Key Fingerprint Generation
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-------------------------------
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The ability to generate fingerprints of keys used by Salt has been added to
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``salt-key``. The new option `finger` accepts the name of the key to generate
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and display a fingerprint for.
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.. code-block:: bash
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salt-key -F master
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Will display the fingerprints for the master public and private keys.
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Parsing System
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--------------
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Pedro Algavio, aka s0undt3ch, has added a substantial update to the command
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line parsing system that makes the help message output much cleaner and easier
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to search through. Salt parsers now have `--versions-report` besides usual
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`--version` info which you can provide when reporting any issues found.
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Key Generation
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--------------
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We have reduced the requirements needed for `salt-key` to generate minion keys.
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You're no longer required to have salt configured and it's common directories
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created just to generate keys. This might prove useful if you're batch creating
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keys to pre-load on minions.
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Startup States
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--------------
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A few configuration options have been added which allow for states to be run
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when the minion daemon starts. This can be a great advantage when deploying
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with Salt because the minion can apply states right when it first runs. To
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use startup states set the ``startup_states`` configuration option on the
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minion to `highstate`.
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New Exclude Declaration
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-----------------------
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Some users have asked about adding the ability to ensure that other sls files
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or ids are excluded from a state run. The exclude statement will delete all of
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the data loaded from the specified sls file or will delete the specified id:
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.. code-block:: yaml
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exclude:
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- sls: http
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- id: /etc/vimrc
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Max Open Files
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--------------
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While we're currently unable to properly handle ZeroMQ's abort signals when the
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max open files is reached, due to the way that's handled on ZeroMQ's, we have
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minimized the chances of this happening without at least warning the user.
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More State Output Options
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-------------------------
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Some major changes have been made to the state output system. In the past state
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return data was printed in a very verbose fashion and only states that failed
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or made changes were printed by default. Now two options can be passed to the
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master and minion configuration files to change the behavior of the state
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output. State output can be set to verbose (default) or non-verbose with the
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``state_verbose`` option:
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.. code-block:: yaml
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state_verbose: False
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It is noteworthy that the state_verbose option used to be set to `False` by
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default but has been changed to `True` by default in 0.10.3 due to many
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requests for the change.
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Te next option to be aware of new and called ``state_output``. This option
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allows for the state output to be set to `full` (default) or `terse`.
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The `full` output is the standard state output, but the new `terse` output
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will print only one line per state making the output much easier to follow when
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executing a large state system.
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.. code-block:: yaml
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state_output: terse
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`state.file.append` Improvements
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--------------------------------
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The salt state `file.append()` tries *not* to append existing text. Previously
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the matching check was being made line by line. While this kind of check might
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be enough for most cases, if the text being appended was multi-line, the check
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would not work properly. This issue is now properly handled, the match is done
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as a whole ignoring any white space addition or removal except inside commas.
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For those thinking that, in order to properly match over multiple lines, salt
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will load the whole file into memory, that's not true. For most cases this is
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not important but an erroneous order to read a 4GB file, if not properly
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handled, like salt does, could make salt chew that amount of memory. Salt has
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a buffered file reader which will keep in memory a maximum of 256KB and
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iterates over the file in chunks of 32KB to test for the match, more than
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enough, if not, explain your usage on a ticket. With this change, also
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`salt.modules.file.contains()`, `salt.modules.file.contains_regex()`,
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`salt.modules.file.contains_glob()` and `salt.utils.find` now do the searching
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and/or matching using the buffered chunks approach explained above.
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Two new keyword arguments were also added, `makedirs` and `source`.
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The first, `makedirs` will create the necessary directories in order to append
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to the specified file, of course, it only applies if we're trying to append to
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a non-existing file on a non-existing directory:
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.. code-block:: yaml
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/tmp/salttest/file-append-makedirs:
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file.append:
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text: foo
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makedirs: True
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The second, `source`, allows one to append the contents of a file instead of
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specifying the text.
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.. code-block:: yaml
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/tmp/salttest/file-append-source:
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file.append:
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- source: salt://testfile
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Security Fix
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============
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A timing vulnerability was uncovered in the code which decrypts the AES
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messages sent over the network. This has been fixed and upgrading is
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strongly recommended.
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