WIP, possibility to create cronjob

generator/crontabs.go

@@ -0,0 +1,84 @@
+package generator
+
+import (
+	"fmt"
+	"katenary/helm"
+	"log"
+
+	"github.com/compose-spec/compose-go/types"
+	"gopkg.in/yaml.v3"
+)
+
+const (
+	cronMulti    = `pods=$(kubectl get pods --selector=%s/component=%s,%s/resource=deployment -o jsonpath='{.items[*].metadata.name}')`
+	cronMultiCmd = `
+for pod in $pods; do
+    kubectl exec -i $pod -c %s -- sh -c '%s'
+done`
+	cronSingle = `pod=$(kubectl get pods --selector=%s/component=%s,%s/resource=deployment -o jsonpath='{.items[0].metadata.name}')`
+	cronCmd    = `
+kubectl exec -i $pod -c %s -- sh -c '%s'`
+)
+
+type CronDef struct {
+	Command  string `yaml:"command"`
+	Schedule string `yaml:"schedule"`
+	Multi    bool   `yaml:"allPods,omitempty"`
+}
+
+func buildCrontab(deployName string, deployment *helm.Deployment, s *types.ServiceConfig, fileGeneratorChan HelmFileGenerator) {
+	// get the cron label from the service
+	var crondef string
+	var ok bool
+	if crondef, ok = s.Labels[helm.LABEL_CRON]; !ok {
+		return
+	}
+
+	// parse yaml
+	crons := []CronDef{}
+	err := yaml.Unmarshal([]byte(crondef), &crons)
+	if err != nil {
+		log.Fatalf("error: %v", err)
+	}
+	log.Println(crons)
+
+	// create a serviceAccount
+	sa := helm.NewServiceAccount(deployName)
+	// create a role
+	role := helm.NewCronRole(deployName)
+
+	// create a roleBinding
+	roleBinding := helm.NewRoleBinding(deployName, sa, role)
+
+	// make generation
+	fileGeneratorChan <- sa
+	fileGeneratorChan <- role
+	fileGeneratorChan <- roleBinding
+
+	// create crontabs
+	for _, cron := range crons {
+		var cmd, podget string
+		if cron.Multi {
+			podget = cronMulti
+			cmd = cronMultiCmd
+		} else {
+			podget = cronSingle
+			cmd = cronCmd
+		}
+		podget = fmt.Sprintf(podget, helm.K, deployName, helm.K)
+		cmd = fmt.Sprintf(cmd, s.Name, cron.Command)
+		cmd = podget + cmd
+
+		cronTab := helm.NewCrontab(
+			deployName,
+			"bitnami/kubectl",
+			cmd,
+			cron.Schedule,
+			sa,
+		)
+		// add crontab
+		fileGeneratorChan <- cronTab
+	}
+
+	return
+}