why:
网络管理中的多因子，需要对接不同的系统；
不同的设备，NSO/AOC都能直接搞定，
设备数量大，需要很多的AOC管理不同区域的设备；
客户变更管理流程通常需要验证基本假设，例如进行网络扫描以确认已部署设备的类型和合规性，验证计划变更的就绪性，以及将变更前后的网络状态存档。所有这些都是成功的网络更新的关键，需要一个自动化工具，允许客户自动化和管理这些步骤。目标：使过程自动化，但使其风险较低。
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Figure 1.
Crosswork Workflow Manager - at a glance
通过Adapter对接Operations Support Systems (OSS) and Business Support Systems (BSS)
默认支持NSO Adapter和Rest Adapter，提供SDK自定义实现Adapter。
该系统构建在基于Kubernetes的云原生基础架构上，因此客户可以利用开源扩展带来额外的功能。=》云原生
Features and benefits
**Table 1. **CWM Features and Benefits
|
Feature
|
Benefit
|
| --- | --- |
|
Workflow scheduling and management platform
|
Enables execution of thousands of workflows in parallel.
|
|
Graphical user interface
|
The GUI provides controls for operational control of workflows, visibility to job scheduling and history, and administrative activities.
|
|
Workflow Authoring compliant with Serverless Workflow specification
|
Customers can build workflows to automate their operational needs. Serverless Workflow specification is used as the domain-specific language for writing such workflows.
|
|
Swagger-enabled REST APIs for northbound integration
|
The product can be controlled through REST APIs. Swagger is used to facilitate coding to those APIs.
|
|
Adapter: NSO
|
Adapter allows integration to drive NSO for device interaction
|
|
Adapter: REST
|
Adapter allows integration to REST-enabled applications
|
|
Adapter: SDK for building custom adapters
|
Customers can build adapters to enable integration to their existing OSS systems. A Software Development Kit (SDK) is provided for customers to use for this. Adapters are written in Golang.
|
|
High availability: Workflow recoverability
|
Workflows are recoverable from a failure within the system.
|
|
High availability: Platform active/standby
|
The Workflow Manager supports an active/standby configuration to allow recovery from a failure of the active system.
|
|
Management: Role-Based Access Control (RBAC)
|
Allows the administrator to define security levels differentiating administration, workflow creation, and operation
|
|
Management: Activity logging
|
Logging is made available through imbedded MinIO and Grafana Loki components
|
|
Management: Performance metrics
|
Metrics are made available through imbedded TimescaleDB
|
特性价值
工作流调度和管理平台，支持数千个工作流并行执行。=>并发涉及的可靠性&CPU占用；调度应该包含时间的设置。
图形用户界面，GUI为工作流的操作控制、作业调度和历史记录的可见性以及管理活动提供了控件。=》拖拽估计必不可少。如何引入三方系统在GUI的体现对于易用性比较关键
工作流编写符合无服务器工作流规范，客户可以构建工作流以自动化他们的操作需求。Serverless Workflow规范被用作编写此类工作流的领域特定语言。=》这种规范在高层次上能打击打击开发人员的积极性，就是不知道客户的决策层是否关注这个。
支持Swagger北向集成的REST API，可以通过REST API控制产品。Swagger是为了方便对这些API进行编码。=》不知道是否是yaml描述。
适配器：NSO，适配器允许集成以驱动NSO进行设备交互
适配器：REST，适配器允许集成到支持REST的应用程序
Adapter：用于构建自定义适配器的SDK，客户可以构建适配器以实现与现有OSS系统的集成。提供软件开发工具包（SDK）供客户使用。适配器是用Golang编写的。
高可用性：工作流可恢复性，工作流可从系统内的故障中恢复。=》这种恢复机制不知道是怎么做的，重试还是回滚？
高可用性：平台主用/备用，工作流管理器支持主用/备用配置，以允许从主用系统的故障中恢复。
管理：基于角色的访问控制（RBAC），允许管理员定义区分管理、工作流创建和操作的安全级别
管理：活动日志记录，通过嵌入式MinIO和Grafana Loki组件提供
管理：性能指标，通过嵌入式TimescaleDB提供指标
**Table 2. **Interoperability
|
Product Family
|
Versions supported
|
Comment
|
| --- | --- | --- |
|
NSO (Network Services Orchestrator)
|
V6.0
|
Using NSO adapter provided by Cisco
|
|
REST
|
NA
|
Using REST adapter provided by Cisco
|
**Table 3. **Compliance
|
Product Family
|
Versions supported
|
Compliance caveats
|
| --- | --- | --- |
|
Serverless Workflow Specification
|
v0.8
|
Partially compliant. Detailed compliance statement is available upon request.
|
|
Swagger
|
v2.0
| |
|
Protocol Buffers (Protobuf)
|
v3
|
Partially compliant. Detailed compliance statement is available upon request.
|
Serverless Workflow Specification这个看起来有点用，其他两个是拿来凑数的。
除了用于本地监控Crosswork Workflow Manager (CWM)的内置功能外，还包括以下基础架构组件以允许与外部监控的接口：
**Table 4. **Infrastructure components used for monitoring the system
|
Component
|
Version
|
Role
|
| --- | --- | --- |
|
TimescaleDB
|
2.9.1-pg15
|
Metrics storage
|
|
MinIO
|
2022-12-12T19-27-27Z
|
Log storage
|
|
Grafana Loki
|
2.6.1
|
Log aggregation
|
这个一般不作为自动化的部分，我司涉A比较难搞
通过使用上述组件提供的接口，客户可以通过Prometheus和Grafana集成到他们的管理系统中，以进行可视化表示、自定义管理视图和产生告警。
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DEMO：
https://www.youtube.com/watch?v=uBl7XMC-JT4
怎么编排只是展示，没有具体代码的介绍；SDK能同步看到代码与编排的步骤；
编排完之后可以在GUI页面直接操作，看到运行结果。可以重复执行；
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