feat: add native and container custom transformer variants for maven to helm

maven-helmchartgen-container/Dockerfile

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+FROM ubuntu
+WORKDIR /m2k
+COPY . .

maven-helmchartgen-container/templates/helm-chart/{{ .ServiceName }}/Chart.yaml

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+apiVersion: v2
+description: A Helm Chart generated by Move2Kube for <~ .ServiceName ~>
+keywords:
+ - <~ .ServiceName ~>
+name: <~ .ServiceName ~>
+version: 0.1.0

maven-helmchartgen-container/templates/helm-chart/{{ .ServiceName }}/templates/{{ .ServiceName }}-deployment.yaml

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+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ annotations:
+ move2kube.konveyor.io/service.expose: "true"
+ creationTimestamp: null
+ labels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ name: <~ .ServiceName ~>
+spec:
+ progressDeadlineSeconds: 600
+ replicas: 2
+ revisionHistoryLimit: 10
+ selector:
+ matchLabels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ strategy:
+ rollingUpdate:
+ maxSurge: 25%
+ maxUnavailable: 25%
+ type: RollingUpdate
+ template:
+ metadata:
+ annotations:
+ move2kube.konveyor.io/service.expose: "true"
+ creationTimestamp: null
+ labels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ name: <~ .ServiceName ~>
+ spec:
+ containers:
+ - image: {{ .Values.registryurl }}/{{ .Values.registrynamespace }}/<~ .ServiceName ~>:latest
+ imagePullPolicy: Always
+ name: <~ .ServiceName ~>
+ ports:
+ - containerPort: 8080
+ protocol: TCP
+ resources: {}
+ terminationMessagePath: /dev/termination-log
+ terminationMessagePolicy: File
+ dnsPolicy: ClusterFirst
+ restartPolicy: Always
+ schedulerName: default-scheduler
+ securityContext: {}
+ terminationGracePeriodSeconds: 30
+status: {}
+
+...

maven-helmchartgen-container/templates/helm-chart/{{ .ServiceName }}/templates/{{ .ServiceName }}-ingress.yaml

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+
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+ creationTimestamp: null
+ labels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ name: <~ .ServiceName ~>
+spec:
+ rules:
+ - host: '{{ .Values.ingresshostdomain }}'
+ http:
+ paths:
+ - backend:
+ service:
+ name: <~ .ServiceName ~>
+ port:
+ name: port-8080
+ path: /gateway
+ pathType: Prefix
+status:
+ loadBalancer: {}
+
+...

maven-helmchartgen-container/templates/helm-chart/{{ .ServiceName }}/templates/{{ .ServiceName }}-service.yaml

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+
+---
+apiVersion: v1
+kind: Service
+metadata:
+ annotations:
+ move2kube.konveyor.io/service.expose: "true"
+ creationTimestamp: null
+ labels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ name: <~ .ServiceName ~>
+spec:
+ ports:
+ - name: port-8080
+ port: 8080
+ protocol: TCP
+ targetPort: 8080
+ selector:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ sessionAffinity: None
+ type: ClusterIP
+status:
+ loadBalancer: {}
+
+...

maven-helmchartgen-container/templates/helm-chart/{{ .ServiceName }}/values.yaml

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+ingresshostdomain: put.the.hostdomain.of.ingress.here
+registryurl: put.the.image.registry.url.here
+registrynamespace: put.the.registry.namespace.here
+imagetag: put.the.image.tag.here

maven-helmchartgen-container/transformer.go

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+package main
+
+import (
+ "encoding/json"
+ "fmt"
+ "io/ioutil"
+ "os"
+ "path/filepath"
+ "regexp"
+ "strings"
+)
+
+var artifactRegex = regexp.MustCompile(`<artifactId>(\w+)</artifactId>`)
+
+const PomFile = "pom.xml"
+
+var input []byte = make([]byte, 2048)
+
+// DirectoryDetect runs detect in each sub directory
+func DirectoryDetect(inputPath string) map[string]interface{} {
+ jsonFile, err := os.Open(inputPath)
+ if err != nil {
+ fmt.Println(err)
+
+ }
+ defer jsonFile.Close()
+ byteValue, _ := ioutil.ReadAll(jsonFile)
+ var data map[string]interface{}
+ err = json.Unmarshal(byteValue, &data)
+ dataFilePath := filepath.Join(data["InputDirectory"].(string), PomFile)
+
+ transform_return_data := make(map[string]interface{})
+ if _, err := os.Stat(dataFilePath); err == nil {
+ serviceName := getServiceName(dataFilePath)
+ transform_return_data = map[string]interface{}{
+ serviceName: []map[string]interface{}{
+ {
+ "paths": map[string]interface{}{
+ "ServiceDirectories": []string{data["InputDirectory"].(string)},
+ "ServiceRootDirectory": []string{data["InputDirectory"].(string)},
+ "pomFiles": []string{dataFilePath},
+ },
+ },
+ },
+ }
+ return transform_return_data
+ }
+ return transform_return_data
+}
+
+// Transform transforms
+func Transform(inputPath string) map[string]interface{} {
+ jsonFile, err := os.Open(inputPath)
+ if err != nil {
+ fmt.Println(err)
+ }
+ defer jsonFile.Close()
+ byteValue, _ := ioutil.ReadAll(jsonFile)
+ var data map[string]interface{}
+ err = json.Unmarshal(byteValue, &data)
+ if err != nil {
+ panic(err)
+ }
+ newArtifacts := data["newArtifacts"].([]interface{})
+
+ pathMappings := []map[string]interface{}{}
+ artifacts := []map[string]interface{}{}
+ pathTemplate := "{{ SourceRel .ServiceFsPath }}"
+ for _, v := range newArtifacts {
+ v := v.(map[string]interface{})
+ serviceName := v["configs"].(map[string]interface{})["Service"].(map[string]interface{})["ServiceName"].(string)
+ paths := v["paths"].(map[string]interface{})
+ dirs := paths["ServiceDirectories"].([]interface{})
+ dir := dirs[0].(string)
+
+ // Create a path template for the service
+ pathTemplateName := strings.ReplaceAll(serviceName, "-", "") + "path"
+ tplPathData := map[string]interface{}{
+ "ServiceFsPath": dir,
+ "PathTemplateName": pathTemplateName,
+ }
+ pathMappings = append(pathMappings, map[string]interface{}{
+ "type": "PathTemplate",
+ "sourcePath": pathTemplate,
+ "templateConfig": tplPathData,
+ })
+ // Since the helm chart uses the same templating character {{ }} as Golang templates,
+ // we use `SpecialTemplate` type here where the templating character is <~ ~>.
+ // The `Template` type can be used for all normal cases
+ pathMappings = append(pathMappings, map[string]interface{}{
+ "type": "SpecialTemplate",
+ "destinationPath": "{{ ." + pathTemplateName + " }}",
+ "templateConfig": map[string]interface{}{
+ "ServiceFsPath": dir,
+ "ServiceName": serviceName,
+ },
+ })
+ pathMappings = append(pathMappings, map[string]interface{}{
+ "type": "Source",
+ "sourcePath": "{{ ." + pathTemplateName + " }}",
+ "destinationPath": "{{ ." + pathTemplateName + " }}",
+ })
+ }
+ transform_return_data := map[string]interface{}{
+ "pathMappings": pathMappings,
+ "artifacts": artifacts,
+ }
+ return transform_return_data
+}
+
+// getServiceName extracts service name from pom file
+func getServiceName(filePath string) string {
+ data, err := os.ReadFile(filePath)
+ if err != nil {
+ fmt.Println("Error reading file:", err)
+ return ""
+ }
+ lines := strings.Split(string(data), "\n")
+ for _, line := range lines {
+ m := artifactRegex.FindStringSubmatch(line)
+ if len(m) != 0 {
+ return m[1]
+ }
+ }
+ return ""
+}
+
+func main() {
+ // ./transformer detect inputpath outputpath
+ // ./transformer transform inputpath outputpath
+ action := os.Args[1]
+ var data map[string]interface{}
+ inputPath := os.Getenv(os.Args[2])
+ // fmt.Println(inputPath)
+ if action == "detect" {
+ data = DirectoryDetect(inputPath)
+ } else {
+ data = Transform(inputPath)
+ }
+ outputPath := os.Getenv(os.Args[3])
+ // fmt.Println(outputPath)
+ file, err := json.Marshal(data)
+ if err != nil {
+ panic(err)
+ }
+ os.MkdirAll(filepath.Dir(outputPath), 0755)
+ err = ioutil.WriteFile(outputPath, file, 0644)
+ if err != nil {
+ panic(err)
+ }
+}

maven-helmchartgen-container/transformer.yaml

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+apiVersion: move2kube.konveyor.io/v1alpha1
+kind: Transformer
+metadata:
+ name: HelmChartGeneratorContainer
+ labels: 
+ move2kube.konveyor.io/built-in: false
+spec:
+ mode: "Container"
+ class: "Executable"
+ isolated: true
+ override:
+ matchLabels: 
+ move2kube.konveyor.io/built-in: "true"
+ directoryDetect:
+ levels: -1
+ consumes:
+ Service:
+ merge: false
+ config:
+ platforms: 
+ - "darwin"
+ directoryDetectCMD: ["./transformer", "detect", "M2K_DETECT_INPUT_PATH", "M2K_DETECT_OUTPUT_PATH"]
+ transformCMD: ["./transformer", "transform", "M2K_TRANSFORM_INPUT_PATH", "M2K_TRANSFORM_OUTPUT_PATH"]
+ container: 
+ image: containerizedtransformer:latest
+ workingDir: "/m2k/"
+ keepAliveCommand: ["tail", "-f", "/dev/null"]
+ build:
+ dockerfile: "Dockerfile"
+ context: "."

maven-helmchartgen-native/templates/helm-chart/{{ .ServiceName }}/Chart.yaml

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+apiVersion: v2
+description: A Helm Chart generated by Move2Kube for <~ .ServiceName ~>
+keywords:
+ - <~ .ServiceName ~>
+name: <~ .ServiceName ~>
+version: 0.1.0

maven-helmchartgen-native/templates/helm-chart/{{ .ServiceName }}/templates/{{ .ServiceName }}-deployment.yaml

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+
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+ annotations:
+ move2kube.konveyor.io/service.expose: "true"
+ creationTimestamp: null
+ labels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ name: <~ .ServiceName ~>
+spec:
+ progressDeadlineSeconds: 600
+ replicas: 2
+ revisionHistoryLimit: 10
+ selector:
+ matchLabels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ strategy:
+ rollingUpdate:
+ maxSurge: 25%
+ maxUnavailable: 25%
+ type: RollingUpdate
+ template:
+ metadata:
+ annotations:
+ move2kube.konveyor.io/service.expose: "true"
+ creationTimestamp: null
+ labels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ name: <~ .ServiceName ~>
+ spec:
+ containers:
+ - image: {{ .Values.registryurl }}/{{ .Values.registrynamespace }}/<~ .ServiceName ~>:latest
+ imagePullPolicy: Always
+ name: <~ .ServiceName ~>
+ ports:
+ - containerPort: 8080
+ protocol: TCP
+ resources: {}
+ terminationMessagePath: /dev/termination-log
+ terminationMessagePolicy: File
+ dnsPolicy: ClusterFirst
+ restartPolicy: Always
+ schedulerName: default-scheduler
+ securityContext: {}
+ terminationGracePeriodSeconds: 30
+status: {}
+
+...

maven-helmchartgen-native/templates/helm-chart/{{ .ServiceName }}/templates/{{ .ServiceName }}-ingress.yaml

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+
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+ creationTimestamp: null
+ labels:
+ move2kube.konveyor.io/service: <~ .ServiceName ~>
+ name: <~ .ServiceName ~>
+spec:
+ rules:
+ - host: '{{ .Values.ingresshostdomain }}'
+ http:
+ paths:
+ - backend:
+ service:
+ name: <~ .ServiceName ~>
+ port:
+ name: port-8080
+ path: /gateway
+ pathType: Prefix
+status:
+ loadBalancer: {}
+
+...