hello_world:\n component: \"@serverless/tencent-website\"\n inputs:\n code:\n src: ./public\n index: index.html\n error: index.html\n region: ap-shanghai\n bucketName: hello_world但是实际生产中，一个 Yaml 中会写很多的部分。
\n例如我的 Blog 的 Yaml：https://github.com/anycodes/ServerlessBlog/blob/master/serverless.yaml。这里面共有十几个函数，如果没有全局变量的话，那可能真的是噩梦。
\n比方有 10 个函数，这些函数都要部署在 ap-guangzhou。部署完成之后，我又要把它们部署到 ap-shanghai 区，如果没有全局变量，就要修改十几个函数的配置。即使批量替换修改，也可能出现问题。所以，此时若有全局变量的组件，就显得尤为重要。
\n为此，我贡献了这样一个组件：serverless-global。通过这个组件，我们可以设置一些全局变量，在程序中使用：
\nConf:\n component: \"serverless-global\"\n inputs:\n region: ap-shanghai\n mysql_host: gz-cdb-mytest.sql.tencentcdb.com\n mysql_user: mytest\n mysql_password: mytest\n mysql_port: 62580\n mysql_db: mytest\n\nAlbum_Login:\n component: \"@serverless/tencent-scf\"\n inputs:\n name: Album_Login\n codeUri: ./album/login\n handler: index.main_handler\n runtime: Python3.6\n region: ${Conf.region}\n environment:\n variables:\n mysql_host: ${Conf.mysql_host}\n mysql_port: ${Conf.mysql_port}\n mysql_user: ${Conf.mysql_user}\n mysql_password: ${Conf.mysql_password}\n mysql_db: ${Conf.mysql_db}通过 serverless-global，我们可以定义一些全局的公共参数，并且通过变量的方法引用这些参数，例如 ${Conf.region} 就是引用 Conf-inputs 中定义的 region 变量。期待 Serverless 团队在未来能支持全局变量的功能。
单独部署组件
\n还是 Serverless Blog 这个例子，里面有多个模块，包括十几个函数、API 网关以及 Website 等。初次部署真的爽歪歪+美滋滋：一键部署就是爽！
\n但是，当我修改其中的某个函数，仅仅修改了一个配置信息，我再执行 sls --debug 部署的时候，它竟然又为我重新部署了一次！部署一次约 10min，可我仅仅修改了一行代码。虽说不是什么大问题，但体验也不如人意：为什么 Component 没有指定部署某个资源的功能？
我猜想：如果可通过某个参数，来控制我要部署那个资源，该有多好？
\n例如：我用命令 sls --debug -n website 可以只部署 website，而不是全部资源再跑一次部署，那多方便啊！于是我思前想后，通过简单的几行代码，实现了一套非常简单的 Component：
![\"流程图\"](\"https://img.serverlesscloud.cn/202034/1583327304232-liucheng.png\")
是的，我就是在官方 Component 上层，嵌套了一个 tempComponent。使用方法很简单，例如，有这么一个 website 的部分：
\ntest1:\n component: \"@serverless/tencent-website\"\n inputs:\n code:\n src: ./public\n index: index.html\n error: index.html\n region: ap-shanghai\n bucketName: test1把里面 component 的名字改一下，改成@gosls：
\ntest1:\n component: \"@gosls/tencent-website\"\n inputs:\n code:\n src: ./public\n index: index.html\n error: index.html\n region: ap-shanghai\n bucketName: test1这样就变成了支持部署单个组件的 component 了，并且所有腾讯云的组件都可以通过修改前面的前缀进行变化，如果不想用了，可以随时修改回 @serverless，下面的 inputs 的内容和格式，和官方的一模一样，直接转发给对应的 @serverless/tencent-website。例如：
\n# serverless.yml\n\ntest1:\n component: \"@gosls/tencent-website\"\n inputs:\n code:\n src: ./public\n index: index.html\n error: index.html\n region: ap-shanghai\n bucketName: test1\n\n\ntest2:\n component: \"@gosls/tencent-website\"\n inputs:\n code:\n src: ./public\n index: index.html\n error: index.html\n region: ap-shanghai\n bucketName: test2\n\n\ntest3:\n component: \"@gosls/tencent-website\"\n inputs:\n code:\n src: ./public\n index: index.html\n error: index.html\n region: ap-shanghai\n bucketName: test3执行 sls --debug：
DFOUNDERLIU-MB0:website_test dfounderliu$ sls --debug\n\n DEBUG ─ Resolving the template's static variables.\n DEBUG ─ Collecting components from the template.\n DEBUG ─ Downloading any NPM components found in the template.\n DEBUG ─ Analyzing the template's components dependencies.\n .....\n DEBUG ─ Website deployed successfully to URL: http://test2-1256773370.cos-website.ap-shanghai.myqcloud.com.\n DEBUG ─ Website deployed successfully to URL: http://test3-1256773370.cos-website.ap-shanghai.myqcloud.com.\n\n test1:\n url: http://test1-1256773370.cos-website.ap-shanghai.myqcloud.com\n env:\n test2:\n url: http://test2-1256773370.cos-website.ap-shanghai.myqcloud.com\n env:\n test3:\n url: http://test3-1256773370.cos-website.ap-shanghai.myqcloud.com\n env:\n\n 19s › test1 › done可以看到完成了三个的部署，当我使用参数，执行部署 test2 的时候：
\nDFOUNDERLIU-MB0:website_test dfounderliu$ sls --debug -n test2\n\n DEBUG ─ Resolving the template's static variables.\n DEBUG ─ Collecting components from the template.\n DEBUG ─ Downloading any NPM components found in the template.\n DEBUG ─ Analyzing the template's components dependencies.\n DEBUG ─ Creating the template's components graph.\n ......\n DEBUG ─ Uploading directory /Users/dfounderliu/Desktop/ServerlessComponents/test/website_test/public to bucket test2-1256773370\n DEBUG ─ Website deployed successfully to URL: http://test2-1256773370.cos-website.ap-shanghai.myqcloud.com.\n\n test1:\n test2:\n url: http://test2-1256773370.cos-website.ap-shanghai.myqcloud.com\n env:\n test3:\n\n 6s › test3 › done可以看到，通过 -n 参数，只部署了 test2，其他的组件没有发生任何变化。\n目前这个功能支持绝大部分 Tencent 官方提供的组件（https://github.com/gosls ）：
\n@serverless/tencent-apigateway\n@serverless/tencent-cam-policy\n@serverless/tencent-cam-role\n@serverless/tencent-cdn\n@serverless/tencent-cos\n@serverless/tencent-egg\n@serverless/tencent-express\n@serverless/tencent-flask\n@serverless/tencent-koa\n@serverless/tencent-laravel\n@serverless/tencent-scf\n@serverless/tencent-website快来开始动手吧～
\n\n
\n\n传送门：
\n\n
\n- GitHub: github.com/serverless
\n- 官网：serverless.com
\n
欢迎访问：Serverless 中文网，您可以在 最佳实践 里体验更多关于 Serverless 应用的开发！
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