January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Content preview from 可编程网络自动化
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自动化工具
｜
325
别忘了
top
文件也是
SLS
，因此默认仍为
Jinja
和
YAML
的组合体，可用于
生成动态映射。如果有一个比较长的区域列表，则上一个例子可以写作如下
形式。
base:
'G@vendor:juniper':
- junos
'G@os:ios and G@version:16*'
- ios_16
'E@(.*)-spine(\d)':
- spine
{% for region in ['emea', 'amers', 'apac'] -%}
'N@{{ region }}':
- communities_{{ region }}
{% endfor -%}
尽管我们的重点只是
Salt
入门，但你应该知道可以集成
Salt
来使用提供更多
动态
top
的外部系统。你可以使用外部服务，而非单个
top
文件。如果你在
其他内部系统或工具中已经有了清单或分组，则这会很有帮助。
4.
理解
grains
前面提到过
grains
，这里会对其做更详细的讲解
。记住，我们已经在
SLS
文件中定义过
pillar
。所以说，
pillar
是用户提供的数据。相比之下，
grains
描述的是
Salt
采集的数据。
grains
是
Salt
采集的有关特定设备的信息
，比如设备厂商、型号、序列号、操作系统版本、
内核、
DNS
、磁盘
、
GPU
以及正常运行时间（
uptime
）。你无须对这些数据做任何操作，
但应该知道它们的存在，因为其有
很多
用途。例如，前面已经展示过如何在
top
文件中使
用
grains
。还可以将其用于模板、条件语句和报表。 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.