# 持续集成

持续集成指的是，频繁地（一天多次）将代码集成到主干。

![img](https://3031472641-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LAr2Be4dyt9wCNUgU_3%2Fuploads%2Fgit-blob-c5bb486ee42e5bfc40594b807c253b9594092ddc%2Fc5c8e6f40c7c133e22402c00bb7e1a25_720w.jpg?alt=media)

持续集成强调开发人员提交了新代码之后，立刻进行构建、（单元）测试。根据测试结果，我们可以确定新代码和原有代码能否正确地集成在一起。

## 持续交付

![img](https://3031472641-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LAr2Be4dyt9wCNUgU_3%2Fuploads%2Fgit-blob-74ab729afaae686debc0a24e23b6058ec6834d26%2Fdb7198e3c39e4656e18efcb4bd1b20b1_720w.jpg?alt=media)

**持续交付（Continuous delivery）指的是，频繁地将软件的新版本，交付给质量团队或者用户，以供评审。**

持续交付在持续集成的基础上，将集成后的代码部署到更贴近真实运行环境的「类生产环境」（*production-like environments*）中。比如，我们完成单元测试后，可以把代码部署到连接数据库的 Staging 环境中更多的测试。如果代码没有问题，可以继续手动部署到生产环境中。

## 持续部署

**持续部署（continuous deployment）是持续交付的下一步，指的是代码通过评审以后，自动部署到生产环境。**

![img](https://3031472641-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LAr2Be4dyt9wCNUgU_3%2Fuploads%2Fgit-blob-e06071090caf630a34fe8bd3aa94ac94ea903507%2Ff96f19e4d567aad5006d841963a86e41_720w.jpg?alt=media)

持续部署则是在持续交付的基础上，把部署到生产环境的过程自动化。


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