Saltstack Study Notes 4-grains

Grains is a component of Saltstack record Minion static information, we can simply understand that the grains contains some of the common properties of each minion, such as CPU, memory, disk, network information, etc. We can view a minion of all grains information through the Grains.items, Minions grains information is minions start when the collection report to master, in the actual application environment we need to customize some grains according to their business needs.

There are three ways of defining Minion:

Minion end through configuration file definition

Minion end through module definition

Python is defined by a template

Grains Simple Command usage

Salt ' minion1 ' sys.list_functions grains

Minion1:

-Grains.append

-Grains.delval

-Grains.filter_by

-Grains.get

-Grains.get_or_set_hash

-Grains.has_value

-Grains.item

-Grains.items

-Grains.ls

-Grains.remove

-Grains.setval

-Grains.setvals

Grains like the above method, detailed usage can be viewed by command

Salt ' minion1 ' sys.doc grains

-----------------------------------------------------------------------

Minion through the configuration file definition, this method is very simple to modify the Minion configuration file

Vim/etc/salt/minion, the comment section has a

#grains:

# roles:

#-Webserver

#-Memcache

# Deployment:datacenter4

# cabinet:13

# cab_u:14-15

For unified control grains can write information to a file

Grains can be modified and defined in this YAML format

/etc/salt/grains

Grains

Roles

-Webserver

-Memcache

Deployment:datacenter4

Cabinet:13

Cab_u:14-15

Restart Minion to make it effective

Salt ' minion1 ' Grains.item grains:roles

Minion1:

----------

Grains:roles:

-Webserver

-Memcache

--------------------------------------------------------------------------------

Defined by the Grains module grains

Salt ' minion1 ' grains.append saltbook ' Verycool '

Minion1:

----------

Saltbook:

-Verycool

[email protected] apache]# Salt ' minion1 ' Grains.item saltbook

Minion1:

----------

Saltbook:

-Verycool

You can use Grains.setvals to set multiple grains information at the same time

Salt ' minion1 ' grains.setvals ' {' Salt ': ' Good ', ' book ': ' Cool '} '

Minion1:

----------

Book

Cool

Salt

Good

[[email protected] apache]# Salt ' minion1 ' grains.item salt

Minion1:

----------

Salt

Good

[[email protected] apache]# Salt ' minion1 ' Grains.item book

Minion1:

----------

Book

Cool

Of course, the deletion of grains information is also supported, and more usage can be queried by Sys.doc grains command

----------------------------------------------------------------------------

Adding grains methods using Python scripting we'll talk about it later.

This article from "Eight Miles" blog, declined reprint!

Saltstack Study Notes 4-grains