In addition to the formula itself, a
FORMULA file must exist which
describes the package. An example of this file is:
name: apache os: RedHat, Debian, Ubuntu, SUSE, FreeBSD os_family: RedHat, Debian, Suse, FreeBSD version: 201506 release: 2 summary: Formula for installing Apache description: Formula for installing Apache
This file must contain at least the following fields:
The name of the package, as it will appear in the package filename, in the
repository metadata, and the package database. Even if the source formula has
-formula in its name, this name should probably not include that. For
instance, when packaging the
apache-formula, the name should be set to
The value of the
os grain that this formula supports. This is used to
help users know which operating systems can support this package.
The value of the
os_family grain that this formula supports. This is used to
help users know which operating system families can support this package.
The version of the package. While it is up to the organization that manages this
package, it is suggested that this version is specified in a
For instance, if this version was released in June 2015, the package version
201506. If multiple releases are made in a month, the
field should be used.
Minimum recommended version of Salt to use this formula. Not currently enforced.
This field refers primarily to a release of a version, but also to multiple versions within a month. In general, if a version has been made public, and immediate updates need to be made to it, this field should also be updated.
A one-line description of the package.
A more detailed description of the package which can contain more than one line.
The following fields may also be present.
This field is optional, but highly recommended. If it is not specified, the package name will be used.
Formula repositories typically do not store
.sls files in the root of the
repository; instead they are stored in a subdirectory. For instance, an
apache-formula repository would contain a directory called
would contain an
init.sls, plus a number of other related files. In this
top_level_dir should be set to
Files outside the
top_level_dir, such as
LICENSE will not be installed. The exceptions to this rule are files that
are already treated specially, such as
A comma-separated list of packages that must be installed along with this package. When this package is installed, SPM will attempt to discover and install these packages as well. If it is unable to, then it will refuse to install this package.
This is useful for creating packages which tie together other packages. For instance, a package called wordpress-mariadb-apache would depend upon wordpress, mariadb, and apache.
A comma-separated list of packages which are related to this package, but are neither required nor necessarily recommended. This list is displayed in an informational message when the package is installed to SPM.
A comma-separated list of optional packages that are recommended to be installed with the package. This list is displayed in an informational message when the package is installed to SPM.
A files section can be added, to specify a list of files to add to the SPM. Such a section might look like:
files: - _pillar - FORMULA - _runners - d|mymodule/index.rst - r|README.rst
files are specified, then only those files will be added to the SPM,
regardless of what other files exist in the directory. They will also be added
in the order specified, which is useful if you have a need to lay down files in
a specific order.
As can be seen in the example above, you may also tag files as being a specific
type. This is done by pre-pending a filename with its type, followed by a pipe
|) character. The above example contains a document file and a readme. The
available file types are:
c: config file
d: documentation file
g: ghost file (i.e. the file contents are not included in the package payload)
l: license file
r: readme file
s: SLS file
m: Salt module
The first 5 of these types (
r) will be placed in
/usr/share/salt/spm/ by default. This can be changed by setting an
spm_share_dir value in your
/etc/salt/spm configuration file.
The last two types (
m) are currently ignored, but they are
reserved for future use.
It is possible to run Salt states before and after installing a package by
using pre and post states. The following sections may be declared in a
pre in their name are evaluated before a package is installed
and sections with
post are evaluated after a package is installed.
states are evaluated before
Each of these sections needs to be evaluated as text, rather than as YAML. Consider the following block:
Note that this declaration uses
pre_local_state. This is a YAML
marker that marks the next multi-line block as text, including newlines. It is
important to use this marker whenever declaring
post states, so
that the text following it can be evaluated properly.
local states are evaluated locally; this is analogous to issuing a state
run using a
salt-call --local command. These commands will be issued on the
local machine running the
spm command, whether that machine is a master or
local states do not require any special arguments, but they must still use
> marker to denote that the state is evaluated as text, not a data
tgt states are issued against a remote target. This is analogous to issuing
a state using the
salt command. As such it requires that the machine that
spm command is running on is a master.
tgt states require that a target be specified, their code blocks
are a little different. Consider the following state:
tgt states, the state data is placed under a
data section, inside
*_tgt_state code block. The target is of course specified as a
and you may also optionally specify a
tgt_type (the default is
You still need to use the
> marker, but this time it follows the
line, rather than the
The reason that state data must be evaluated as text rather than a data structure is because that state data is first processed through the rendering engine, as it would be with a standard state run.
This means that you can use Jinja or any other supported renderer inside of
Salt. All formula variables are available to the renderer, so you can reference
FORMULA data inside your state if you need to:
You may also declare your own variables inside the
FORMULA. If SPM doesn't
recognize them then it will ignore them, so there are no restrictions on
variable names, outside of avoiding reserved words.
By default the renderer is set to
yaml_jinja. You may change this by
renderer setting in the
FORMULA file has been created, it is placed into the root of the
formula that is to be turned into a package. The
spm build command is
used to turn that formula into a package:
spm build /path/to/saltstack-formulas/apache-formula
The resulting file will be placed in the build directory. By default this
directory is located at
When an execution module is placed in
<file_roots>/_modules/ on the master,
it will automatically be synced to minions, the next time a sync operation takes
place. Other modules are also propagated this way: state modules can be placed
_states/, and so on.
When SPM detects a file in a package which resides in one of these directories,
that directory will be placed in
<file_roots> instead of in the formula
directory with the rest of the files.
Packages may be removed once they are installed using the
spm remove apache
If files have been modified, they will not be removed. Empty directories will also be removed.
Packages are built using BZ2-compressed tarballs. By default, the package
database is stored using the
sqlite3 driver (see Loader Modules below).
Support for these are built into Python, and so no external dependencies are needed.
All other files belonging to SPM use YAML, for portability and ease of use and maintainability.
SPM was designed to behave like traditional package managers, which apply files to the filesystem and store package metadata in a local database. However, because modern infrastructures often extend beyond those use cases, certain parts of SPM have been broken out into their own set of modules.
By default, the package database is stored using the
sqlite3 module. This
module was chosen because support for SQLite3 is built into Python itself.
Please see the SPM Development Guide for information on creating new modules for package database management.
By default, package files are installed using the
local module. This module
applies files to the local filesystem, on the machine that the package is
Please see the SPM Development Guide for information on creating new modules for package file management.
SPM supports different types of formula packages. The function of each package
is denoted by its name. For instance, packages which end in
considered to be Salt States (the most common type of formula). Packages which
-conf contain configuration which is to be placed in the
/etc/salt/ directory. Packages which do not contain one of these names are
treated as if they have a
By default, most files from this type of package live in the
directory. The exception is the
pillar.example file, which will be renamed
<package_name>.sls and placed in the pillar directory (
By default, files from this type of package live in the
The files in this type of package are configuration files for Salt, which
normally live in the
/etc/salt/ directory. Configuration files for packages
other than Salt can and should be handled with a Salt State (using a
type of package).