Salt 0.9.0 Release Notes¶

Salt Syndic¶

The new Syndic interface allows a master to be commanded via another higher level salt master. This is a powerful solution allowing a master control structure to exist, allowing salt to scale to much larger levels then before.

Peer Communication¶

0.9.0 introduces the capability for a minion to call a publication on the master and receive the return from another set of minions. This allows salt to act as a communication channel between minions and as a general infrastructure message bus.

Peer communication is turned off by default but can be enabled via the peer option in the master configuration file. Documentation on the new Peer interface.

Easily Extensible API¶

The minion and master classes have been redesigned to allow for specialized minion and master servers to be easily created. An example on how this is done for the master can be found in the master.py salt module:

https://github.com/saltstack/salt/blob/develop/salt/master.py

The Master class extends the SMaster class and set up the main master server.

The minion functions can now also be easily added to another application via the SMinion class, this class can be found in the minion.py module:

https://github.com/saltstack/salt/blob/develop/salt/minion.py

Cleaner Key Management¶

This release changes some of the key naming to allow for multiple master keys to be held based on the type of minion gathering the master key.

The -d option has also been added to the salt-key command allowing for easy removal of accepted public keys.

The --gen-keys option is now available as well for salt-key, this allows for a salt specific RSA key pair to be easily generated from the command line.

Improved 0MQ Master Workers¶

The 0MQ worker system has been further refined to be faster and more robust. This new system has been able to handle a much larger load than the previous setup. The new system uses the IPC protocol in 0MQ instead of TCP.

New Minion Modules¶