连接:https://developers.sap.com/tu...html
本地文件:C:\Code\referenceCode\SAP Kyma教程例子\api-mssql-gogolang
go 应用的入口:sql
该 dockerfile 定义了两个阶段来构造 docker 镜像文件。docker
(1)In the first stage, a Go image is used. It copies the related content of the project into the image and builds the application. shell
(2)The built application is then copied into the Docker scratch image and exposed on port 8000. The scratch image is an empty image containing no other tools within it so obtaining a shell/bash session is not possible.json
FROM scratch WORKDIR /app COPY --from=builder /app/api-mssql-go /app/
若是上面三行代码删除,对最后构建好的 docker 镜像文件的影响就是,尺寸会比不注释后的镜像文件尺寸大。这三行代码的做用是,从一个空的 scratch 镜像开始构建,仅将以前 go 镜像 /app/api-mssql-go 文件夹拷贝到新镜像的 app 目录,这样尺寸大大减少。api
apirule:bash
从上图能够看到,这个 GO MSSQL API endpoint,支持对订单的增删改查。session
本地运行 go 应用:app
go run ./cmd/api/main.go
本地 endpoint 以下:
http://localhost:8000/orders
读取订单:curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET http://localhost:8000/orders
建立订单:curl --data "{\"order_id\":\"10000003\",\"description\":\"test from curl\"}" http://localhost:8000/orders
进入 api-mssql-go 文件夹,构建 docker 镜像:
docker build -t i042416/api-mssql-go -f docker/Dockerfile .
上传镜像:
docker push <your-docker-id>/api-mssql-go
本地启动镜像:
docker run -p 8000:8000 --name api-mssql-go \ -e MYAPP_username="sa" \ -e MYAPP_password="Yukon900" \ -e MYAPP_database="DemoDB" \ -e MYAPP_host="host.docker.internal" \ -e MYAPP_port="1433" \ -d <your-docker-id>/api-mssql-go:latest
最后,把 k8s 文件夹下全部 yaml 文件,部署到 SAP Kyma 便可。
更多Jerry的原创文章,尽在:"汪子熙":