2.3-saltstack Grains

Grains #收集设备的所有信息

Grains is a collection of information that is collected at Minion startup, such as the operating system type, network card IP, kernel version, CPU architecture, and so on.

Using commands

Salt ' client.wyp.com ' grains.ls lists all grains project names

Salt ' client.wyp.com ' grains.items lists all grains items and values

Grains information is not dynamic and is not always changed, it is only collected at minion startup.

We can do configuration management according to some information collected by grains.

Grains supports custom information.

Custom Grains

On the client:

Vim/etc/salt/minion

Add or change:

Grains

Role

-Nginx

Env:

-Test

Or

Vim/etc/salt/grains

Add to:

Role:nginx #注意空格, preceded by a custom name, followed by a value.

Env:test

Restart Minion Service

To get grains on the server:

Salt ' * ' grains.item role env

Salt ' client.wyp.com ' grains.get role

Grains is actually very handy when executing commands remotely. We can follow some of the grains's indicators to operate. For example, the grains role of all Web servers is set to Nginx, so that we can batch to the Nginx server operation:

Salt-g role:nginx cmd.run ' hostname '

Salt-g os:centos cmd.run ' hostname '

2.3-saltstack Grains