Merge pull request #286 from markfuller/helm

Helm action with example

examples/go-samples/helm_go/helm_go.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+
+	"github.com/hashicorp/go-hclog"
+	"github.com/lyraproj/servicesdk/lang/go/lyra"
+)
+
+type helmIn struct {
+	Name      string
+	Chart     string
+	Overrides []string
+	Namespace *string
+}
+
+type helmOut struct {
+	Output string
+}
+
+func helmInstall(in helmIn) helmOut {
+	log := hclog.Default()
+	namespace := "default"
+	if in.Namespace != nil {
+		namespace = *in.Namespace
+	}
+	args := []string{
+		"upgrade",
+		"--install",
+		in.Name,
+		in.Chart,
+		"--namespace",
+		namespace,
+	}
+	if len(in.Overrides) > 0 {
+		args = append(args, "--set")
+		x := strings.Join(in.Overrides, ",")
+		args = append(args, x)
+	}
+	cmd := exec.Command("helm", args...)
+
+	log.Debug("about to run command", "cmd", cmd)
+
+	out, err := cmd.CombinedOutput()
+	output := fmt.Sprintf("%s", out)
+	if err != nil {
+		panic(fmt.Errorf("error running helm cmd %v \n error is %v \n output is %v", cmd, err, output))
+	}
+
+	return helmOut{Output: output}
+}
+
+func main() {
+	lyra.Serve(`helm_go`, nil, &lyra.Action{Do: helmInstall})
+}

workflows/helm.yaml

@@ -0,0 +1,11 @@
+returns: [helm_output]
+steps:
+  helm:
+    parameters:
+      name: {value: "wordpress"}
+      chart: {value: "stable/wordpress"}
+      namespace: {value: null}     
+      overrides: {value: ["wordpressUsername=somebody", "wordpressPassword=Anything", "wordpressBlogName=The Blog", "externalDatabase.Host=myserver"]}
+    returns:
+      helm_output: output
+    call: helm_go

workflows/helm_go.ll

@@ -0,0 +1,4 @@
+executable: go
+arguments:
+ - run
+ - 'examples/go-samples/helm_go/helm_go.go'