Update kubernetes quantity parsing error message

Author: deliahu

pkg/lib/k8s/errors.go

@@ -0,0 +1,81 @@
+/*
+Copyright 2019 Cortex Labs, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package k8s
+
+type ErrorKind int
+
+const (
+	ErrUnknown       ErrorKind = iota
+	ErrParseQuantity ErrorKind = iota
+)
+
+var errorKinds = []string{
+	"err_unknown",
+	"err_parse_quantity",
+}
+
+var _ = [1]int{}[int(ErrParseQuantity)-(len(errorKinds)-1)] // Ensure list length matches
+
+func (t ErrorKind) String() string {
+	return errorKinds[t]
+}
+
+// MarshalText satisfies TextMarshaler
+func (t ErrorKind) MarshalText() ([]byte, error) {
+	return []byte(t.String()), nil
+}
+
+// UnmarshalText satisfies TextUnmarshaler
+func (t *ErrorKind) UnmarshalText(text []byte) error {
+	enum := string(text)
+	for i := 0; i < len(errorKinds); i++ {
+		if enum == errorKinds[i] {
+			*t = ErrorKind(i)
+			return nil
+		}
+	}
+
+	*t = ErrUnknown
+	return nil
+}
+
+// UnmarshalBinary satisfies BinaryUnmarshaler
+// Needed for msgpack
+func (t *ErrorKind) UnmarshalBinary(data []byte) error {
+	return t.UnmarshalText(data)
+}
+
+// MarshalBinary satisfies BinaryMarshaler
+func (t ErrorKind) MarshalBinary() ([]byte, error) {
+	return []byte(t.String()), nil
+}
+
+type Error struct {
+	Kind    ErrorKind
+	message string
+}
+
+func (e Error) Error() string {
+	return e.message
+}
+
+func ErrorParseQuantity(qtyStr string) error {
+	return Error{
+		Kind:    ErrParseQuantity,
+		message: qtyStr + ": invalid kubernetes quantity, some valid examples are 1, 200m, 500Mi, 2G (see here for more information: https://docs.cortex.dev/deployments/compute)",
+	}
+}

pkg/operator/api/userconfig/quantity.go

@@ -23,6 +23,7 @@ import (
 	kresource "k8s.io/apimachinery/pkg/api/resource"
 
 	"github.com/cortexlabs/cortex/pkg/lib/configreader"
+	"github.com/cortexlabs/cortex/pkg/lib/k8s"
 	s "github.com/cortexlabs/cortex/pkg/lib/strings"
 )
 
@@ -42,7 +43,7 @@ func QuantityParser(v *QuantityValidation) func(string) (interface{}, error) {
 	return func(str string) (interface{}, error) {
 		k8sQuantity, err := kresource.ParseQuantity(str)
 		if err != nil {
-			return Quantity{}, err
+			return Quantity{}, k8s.ErrorParseQuantity(str)
 		}
 
 		if v.GreaterThan != nil {