Due to a change in master to minion communication, 2014.1.0 minions are not compatible with older-version masters. Please upgrade masters first. More info on backwards-compatibility policy here, under the "Upgrading Salt" subheading.
The 2014.1.0 release of Salt is a major release which not only increases stability but also brings new capabilities in virtualization, cloud integration, and more. This release brings a great focus on the expansion of testing making roughly double the coverage in the Salt tests, and comes with many new features.
2014.1.0 is the first release to follow the new date-based release naming system. See the version numbers page for more details.
Salt Cloud is a tool for provisioning salted minions across various cloud providers. Prior to this release, Salt Cloud was a separate project but this marks its full integration with the Salt distribution. A Getting Started guide and additional documentation for Salt Cloud can be found here:
Alongside Salt Cloud comes new support for the Google Compute Engine. Salt Stack can now deploy and control GCE virtual machines and the application stacks that they run.
For more information on Salt Stack and GCE, please see this blog post.
Documentation for Salt and GCE can be found here.
Salt Virt is a cloud controller that supports virtual machine deployment, inspection, migration and integration with many aspects of Salt.
Salt Virt has undergone a major overhaul with this release and now supports many more features and includes a number of critical improvements.
Salt continues to increase its unit/regression test coverage. This release includes over 300 new tests.
BSD package management has been entirely rewritten. FreeBSD 9 and older now default to using pkg_add, while FreeBSD 10 and newer will use pkgng. FreeBSD 9 can be forced to use pkgng, however, by specifying the following option in the minion config file:
providers: pkg: pkgng
The iptables state and module now have IPv6 support. A new parameter family has been added to the states and execution functions, to distinguish between IPv4 and IPv6. The default value for this parameter is ipv4, specifying ipv6 will use ip6tables to manage firewall rules.
Several performance improvements have been made to the Git fileserver backend. Additionally, file states can now use any any SHA1 commit hash as a fileserver environment:
/etc/httpd/httpd.conf: file.managed: - source: salt://webserver/files/httpd.conf - saltenv: 45af879
This applies to the functions in the cp module as well:
salt '*' cp.get_file salt://readme.txt /tmp/readme.txt saltenv=45af879
This new fileserver backend allows files which have been pushed from the minion to the master (using cp.push) to be served up from the salt fileserver. The path for these files takes the following format:
minion-id is the id of the "source" minion, the one from which the files were pushed to the master. /path/to/file is the full path of the file.
The MinionFS Walkthrough contains a more thorough example of how to use this backend.
To distinguish between fileserver environments and execution functions which deal with environment variables, fileserver environments are now specified using the saltenv parameter. env will continue to work, but is deprecated and will be removed in a future release.
A caching layer has been added to the Grains system, which can help speed up minion startup. Disabled by default, it can be enabled by setting the minion config option grains_cache:
grains_cache: True # Seconds before grains cache is considered to be stale. grains_cache_expiration: 300
If set to True, the grains loader will read from/write to a msgpack-serialized file containing the grains data.
Additional command-line parameters have been added to salt-call, mainly for testing purposes:
When using the cmd module, either on the CLI or when developing Salt execution modules, a new keyword argument output_loglevel allows for greater control over how (or even if) the command and its output are logged. For example:
salt '*' cmd.run 'tail /var/log/messages' output_loglevel=debug
The package management modules (apt, yumpkg, etc.) have been updated to log the copious output generated from these commands at loglevel debug.
To keep a command from being logged, output_loglevel=quiet can be used.
Prior to this release, this could be done using quiet=True. This argument is still supported, but will be removed in a future Salt release.
Sometimes the subprocess module is not good enough, and, in fact, not even askpass is. This virtual terminal is still in it's infant childhood, needs quite some love, and was originally created to replace askpass, but, while developing it, it immediately proved that it could do so much more. It's currently used by salt-cloud when bootstrapping salt on clouds which require the use of a password.
Initial basic support for Proxy Minions is in this release. Documentation can be found here.
Proxy minions are a developing feature in Salt that enables control of devices that cannot run a minion. Examples include network gear like switches and routers that run a proprietary OS but offer an API, or "dumb" devices that just don't have the horsepower or ability to handle a Python VM.
Proxy minions can be difficult to write, so a simple REST-based example proxy is included. A Python bottle-based webserver can be found at https://github.com/cro/salt-proxy-rest as an endpoint for this proxy.
This is an ALPHA-quality feature. There are a number of issues with it currently, mostly centering around process control, logging, and inability to work in a masterless configuration.
Below are many of the fixes that were implemented in salt during the release candidate phase.
These docs are for Salt's development version: 442ca77.
Docs for previous releases are available on readthedocs.org.
Latest Salt release: 2014.1.10