Custom resource definition

Co-authored-by: Mathieu Lonjaret <mathieu.lonjaret@gmail.com>

provider/kubernetes/k8s/namespace.go

@@ -0,0 +1,32 @@
+package k8s
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Namespaces holds kubernetes namespaces.
+type Namespaces []string
+
+// Set adds strings elem into the the parser
+// it splits str on , and ;.
+func (ns *Namespaces) Set(str string) error {
+	fargs := func(c rune) bool {
+		return c == ',' || c == ';'
+	}
+	// get function
+	slice := strings.FieldsFunc(str, fargs)
+	*ns = append(*ns, slice...)
+	return nil
+}
+
+// Get []string.
+func (ns *Namespaces) Get() interface{} { return *ns }
+
+// String return slice in a string.
+func (ns *Namespaces) String() string { return fmt.Sprintf("%v", *ns) }
+
+// SetValue sets []string into the parser.
+func (ns *Namespaces) SetValue(val interface{}) {
+	*ns = val.(Namespaces)
+}

provider/kubernetes/k8s/parser.go

@@ -0,0 +1,37 @@
+package k8s
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+
+	"github.com/containous/traefik/log"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes/scheme"
+)
+
+// MustParseYaml parses a YAML to objects.
+func MustParseYaml(content []byte) []runtime.Object {
+	acceptedK8sTypes := regexp.MustCompile(`(Deployment|Endpoints|Service|Ingress|IngressRoute|Middleware|Secret)`)
+
+	files := strings.Split(string(content), "---")
+	retVal := make([]runtime.Object, 0, len(files))
+	for _, file := range files {
+		if file == "\n" || file == "" {
+			continue
+		}
+
+		decode := scheme.Codecs.UniversalDeserializer().Decode
+		obj, groupVersionKind, err := decode([]byte(file), nil, nil)
+		if err != nil {
+			panic(fmt.Sprintf("Error while decoding YAML object. Err was: %s", err))
+		}
+
+		if !acceptedK8sTypes.MatchString(groupVersionKind.Kind) {
+			log.WithoutContext().Debugf("The custom-roles configMap contained K8s object types which are not supported! Skipping object with type: %s", groupVersionKind.Kind)
+		} else {
+			retVal = append(retVal, obj)
+		}
+	}
+	return retVal
+}