The new Salt project, Salt Cloud, is introduced with version 0.6.0. Salt Cloud has been developed to ease the automation and integration of Salt with public cloud providers by allowing cloud vms to be cleanly defined, created and automatically hooked back into a Salt Master.
While Salt Cloud is primarily made to build cloud vms to tie into a Salt Mater, it has been created in a generic way, so that it can be used to provision and hook systems of any type via the familiar Salt modules system.
This release supports three public cloud providers (all via libcloud), Amazon EC2, Rackspace Cloud and Linode.
The documentation for Salt Cloud can be found on Read the Docs: http://salt-cloud.readthedocs.org
Salt Cloud can be downloaded and install via pypi or github:
Packages are not yet available, Salt Cloud requires three dependencies, the salt libs, libcloud, and paramiko.
The Salt loader system has been employed to make adding support for additional public cloud systems just as modular and simple as adding support for new package managers in Salt.
Adding support for a new cloud provider is extremely simple, just add a cloud module and everything cleanly links together.
The way a vms is created is done via profiles. Profiles are used to define what properties a vm will have, the cloud provider, the size and the image.
centos_rackspace: provider: rackspace image: CentOS 6.2 size: 1024 server os: RHEL6 minion: grains: role: webserver master: salt.example.com
This profile will be used to create vms on Rackspace cloud with the CentOS 6.2 image and the Rackspace 1024 vm size. Particulars of the minion config can also be specified.
Individual vms can be created from profiles:
# salt-cloud -p centos_rackspace web1
This command creates a vms with the name web1 on the Rackspace cloud and connects the new vm to a Salt Master located at salt.example.com. The new VM has the Salt id of web1.
When it is desired to have a predefined mapping of many, or a specific group of vms then a cloud map can be defined:
centos_rackspace: web1 web2 web3 web4 centos_linode: redis1 riak1 riak2 riak3 ubuntu_ec2: dev1 dev2 cassandra1 cassandra2 cassandra3
This map file will create vms named web 1-4 using the centos_rackspace profile on rackspace, the redis and riak vms on linode and the dev and Cassandra vms on ec2. It can be run with salt-cloud:
# salt-cloud -m mapfile
When creating more than one vm the -P option can be passed, to make the vms provision in parallel, greatly speeding up large scale expansions of vms.