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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
20
|
第
2
章
这种灵活性不仅有助于迁移,还可以帮助
DR
,因为在生产和
DR
数据中心中配备不同的
交换机型号,甚至不同的厂商都是很常见的事。如果设备发生故障,不得不替换为其他平
台,就可以迅速利用通用数据模型(想想参数输入)立即生成新的配置。接下来,我们将
不那么严格地使用
数据模型
(
data
model
)这个术语,不过请放心,第
5
章会详细描述和
强调什么是数据模型。
所以,在进行迁移时,不妨从更抽象的层面上思考,仔细考虑从一个平台迁移到另一个平
台所需的步骤。然后看看怎样才能自动化地完成这些任务,因为有动力实现多厂商自动化
的只有你自己,大型网络厂商才不会操心这种事。例如,把添加
VLAN
视为一个抽象步
骤,然后再考虑各个平台所用的低层命令。关键在于,当你开始实现自动化的时候,需要
在键入
CLI
命令或编写代码
(各个平台)之前思考涉及的各项任务,并使用与厂商无关
(
vendor
-neutral
)的易读形式记录下来。
2.2.4
配置管理
配置管理是最为常见的自动化类型,所以本书不打算在这个话题上花费太多时间。你应该
意识到,在谈及配置管理的时候,所指的是部署、推送以及管理设备配置状态,其中涉及
的工作从基础的
VLAN
配
给到配置架顶式交换机、防火墙、负载均衡器、高级安全基础设
施以部署三层架构应用程序的更为复杂的工作流。
你也已经见识过了只用
照搬配置
(
read-only
)的自动化形式
,没必要通过推送配置信息来
开启自动化之旅。不过,如果你一直在花费大把时间向成批的路由器或交换机推送相同的
变更,那么也许会想试试自动化推送。 ...
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Publisher Resources
ISBN: 9787115606181