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O'Reilly Platform
book
可编程网络自动化
by
Jason Edelman
,
Scott S. Lowe
,
Matt Oswalt
January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Posts & Telecom Press
Content preview from
可编程网络自动化
320
|
第
9
章
9.3.2
熟悉
Salt
要想使用
Salt
,需要知晓大量的术语。为了理解和使用该系统,必须对这些概念及其如何
适应整个
Salt
框架有所了解。我们接下来将介绍其中一些。首先来看
SLS
文件格式。
1.
理解
SLS
文件格式
你已经学过了
Jinja
模板和
Y
AML
文件。就这两者而言,
Jinja
只是一种模板语言,而
YAML
则是一种以人类易读格式结构化数据的方式
。想象一下,使用一个同时理解
Jinja
(和其他模板语言)和
Y
AML
(和其他数据格式)的文件来创建不同的数据集(将数据插
入模板的过程)。
SLS
文件正是如此。
SLS
是
Salt
的专有文件格式
,代表
SaLt State
。这是一种可以在同一文件中使用数据描述
和模板语言的混合体。
在默认情况下,
SLS
文件是
Y
AML
和
Jinja
的组合体。但由于
Salt
和
SLS
的灵活性,很
容易切换到不同的组合。这正体现了
Salt
所具有的可插入性
(
pluggability
)——并不局
限于
Jinja
和
Y
AML
,你拥有多种选择。例如,对于数据描述,你可以从中选择
YAML
、
YAMLEX
、
JSON
、
JSON5
、
HJSON
,甚至是纯
Python
;对于模板
,你可以从中选择
Jinja
、
Mako
、
Genshi
、
Cheetach
、
W
empy
,或者纯
Python
。也可以根据需求和偏好做出其他选择。
支持不同类型的数据描述和模板引擎的一个用例是,它简化了从其他工具的迁移。如果你
有一个内部(或定制)工具使用
Mako
模板
(另一个基于
Python
的模板引擎),则可以轻
松地将其与
Salt
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Publisher Resources
ISBN: 9787115606181