Merge pull request #604 from grego952/add-api-go-folder

Add api-postgres-go and delete api-mssql-go

Author: grego952

README.md

@@ -91,8 +91,8 @@ Running various samples requires access to the Kyma environment. There are also
 
 | Name                                                                      | Description                                                                                                 | References                                                                     |
 | ------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------ |
+| [Deploy a Go PostgreSQL API Endpoint in SAP BTP, Kyma Runtime](./api-postgresql-go/README.md)                    | This sample provides a Golang API endpoint for communication with an MS SQL database                        | [Tutorial](https://developers.sap.com/tutorials/cp-kyma-api-mssql-golang.html) |
 | [Use and Seed SAP BTP PostgreSQL in SAP BTP, Kyma Runtime](./database-postgres/README.md)                             | This sample demonstrates how to containerize and deploy an MS SQL database                                   | [Tutorial](https://developers.sap.com/tutorials/cp-kyma-mssql-deployment.html) |
-| [Golang MS SQL database API](./api-mssql-go/README.md)                    | This sample provides a Golang API endpoint for communication with an MS SQL database                        | [Tutorial](https://developers.sap.com/tutorials/cp-kyma-api-mssql-golang.html) |
 
 ## Advanced Scenarios
 

api-mssql-go/README.md

@@ -0,0 +1,78 @@
+# Deploy a Go PostgreSQL API Endpoint in SAP BTP, Kyma Runtime
+
+## Overview
+
+> [!NOTE]
+> This sample is used in the Deploy a Go PostgreSQL API Endpoint in SAP BTP, Kyma Runtime tutorial.
+
+This sample provides a Golang API endpoint for communication with PostgreSQL databases. The API connects to a BTP-managed PostgreSQL instance using Service Binding credentials available in the Kyma cluster.
+
+## PostgreSQL Database Example
+
+For the PostgreSQL example, use the `deployment.yaml` file. It provides the Deployment definition as well as an APIRule to expose the API without authentication. The Deployment references the PostgreSQL Service Binding Secret for connection credentials.
+
+This sample demonstrates how to:
+
+- Create a development namespace in the Kyma runtime.
+- Deploy the following Kubernetes resources:
+  - API deployment written in GO
+  - API Rule
+  - Service
+  - ConfigMap
+
+## Prerequisites
+
+- SAP BTP, Kyma runtime instance
+- PostgreSQL Service Instance and Service Binding in the Kyma cluster
+- [Docker](https://www.docker.com/)
+- [Go](https://golang.org/doc/install)
+- [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) configured to use the `KUBECONFIG` file downloaded from the Kyma runtime
+
+## Procedure
+
+### Build the Docker Image
+
+1. Build and push the image to your Docker repository:
+
+   ```shell script
+   docker build -t {your-docker-account}/api-postgresql-go -f docker/Dockerfile .
+   docker push {your-docker-account}/api-postgresql-go
+   ```
+
+### Deploy the API
+
+1. Create a new `dev` namespace:
+
+   ```shell script
+   kubectl create namespace dev
+   kubectl label namespaces dev istio-injection=enabled
+   ```
+
+2. Apply the ConfigMap:
+
+   ```shell script
+   kubectl -n dev apply -f ./k8s/configmap.yaml
+   ```
+
+3. Apply the Deployment:
+
+   ```shell script
+   kubectl -n dev apply -f ./k8s/deployment.yaml
+   ```
+
+4. Apply the APIRule:
+
+   ```shell script
+   kubectl -n dev apply -f ./k8s/apirule.yaml
+   ```
+
+5. Verify that the Deployment is up and running:
+
+   ```shell script
+   kubectl -n dev get deployment api-postgresql-go
+   ```
+
+6. Use the APIRule:
+
+   - `https://api-postgresql-go.{cluster-domain}/orders`
+   - `https://api-postgresql-go.{cluster-domain}/orders/10000001`

api-mssql-go/k8s/configmap.yaml

@@ -6,7 +6,7 @@ import (
 
 	"github.com/gorilla/mux"
 
-	"github.com/SAP-samples/kyma-runtime-extension-samples/api-mssql-go/internal/api"
+	"github.com/SAP-samples/kyma-runtime-extension-samples/api-postgresql-go/internal/api"
 )
 
 func main() {

api-mssql-go/k8s/deployment-servicebinding.yaml

@@ -1,4 +1,4 @@
-FROM golang:1.14 as builder
+FROM golang:1.21 as builder
 
 ENV GO111MODULE=on
 
@@ -12,11 +12,11 @@ COPY cmd               ./cmd
 COPY internal               ./internal
 
 RUN ls /app/
-RUN CGO_ENABLED=0 GOOS=linux go build -v -a -o api-mssql-go ./cmd/api
+RUN CGO_ENABLED=0 GOOS=linux go build -v -a -o api-postgresql-go ./cmd/api
 
 FROM scratch
 WORKDIR /app
-COPY --from=builder /app/api-mssql-go /app/
+COPY --from=builder /app/api-postgresql-go /app/
 
 EXPOSE 8000
-ENTRYPOINT ["/app/api-mssql-go"]
+ENTRYPOINT ["/app/api-postgresql-go"]

api-mssql-go/k8s/secret.yaml

@@ -1,10 +1,9 @@
-module github.com/SAP-samples/kyma-runtime-extension-samples/api-mssql-go
+module github.com/SAP-samples/kyma-runtime-extension-samples/api-postgresql-go
 
 go 1.14
 
 require (
-	github.com/denisenkom/go-mssqldb v0.0.0-20200910202707-1e08a3fab204
 	github.com/gorilla/mux v1.8.0
+	github.com/lib/pq v1.10.9
 	github.com/vrischmann/envconfig v1.3.0
-	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 // indirect
 )