COMMUNITIES OF PRACTICE i. Ensure automated tests demonstrate use and behavior of libraries and components ii. Test suite becomes the living documentation of the system specification and represent working ORGANIZATIONAL GOALS i. Balance team productivity against organizational goals; let operations influence components used in production or have the ability to not be responsible for unsupported platforms ii. Systematically assembling applications from third-party components and integrating them with our business logic. We inherit the vulnerabilities of these 3rd party components ii. Examine dependencies for known vulnerabilities

Implement Feature Toggles 1. Selectively enable/disable features without code deployments 2. Wrap UI or application logic in conditional statements or strategy patterns 3. Support easy roll back 4

deployed components are replaced in their entirety, rather than being updated in place. Deploying immutable infrastructure requires standardization and emulation of common infrastructure components to achieve

读操作一般都是升序或者降序 ③HTTP Server: 为告警和绘图提供查询接口 Promethus通过PromQL语句查询指标信息，并在页面展示。虽然Prometheus自 带UI界面，但是大多数是使用Grafana进行绘图展示。另外也可通过API接口来给 第三方软件提供监控指标。alertmanager组件负责邮件报警。 ★部署Prometheus 部署清单文件下载：