[YUNIKORN-1948] Introduce a command to validate the content of a give…

Makefile

@@ -177,7 +177,7 @@ pseudo:
 
 # Build the example binaries for dev and test
 .PHONY: commands
-commands: build/simplescheduler build/schedulerclient
+commands: build/simplescheduler build/schedulerclient build/queueconfigchecker
 
 build/simplescheduler: go.mod go.sum cmd
 	@echo "building example scheduler"
@@ -189,6 +189,11 @@ build/schedulerclient:
 	@mkdir -p build
 	"$(GO)" build $(RACE) -a -ldflags '-extldflags "-static"' -o build/schedulerclient ./cmd/schedulerclient
 
+build/queueconfigchecker:
+	@echo "building queueconfigchecker"
+	@mkdir -p build
+	"$(GO)" build $(RACE) -a -ldflags '-extldflags "-static"' -o build/queueconfigchecker ./cmd/queueconfigchecker
+
 # Build binaries for dev and test
 .PHONY: build
 build: commands

cmd/queueconfigchecker/queueconfigchecker.go

@@ -0,0 +1,47 @@
+/*
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements.  See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership.  The ASF licenses this file
+ to you 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 main
+
+import (
+	"log"
+	"os"
+
+	"github.com/apache/yunikorn-core/pkg/common/configs"
+)
+
+/*
+A utility command to load queue configuration file and check its validity
+*/
+func main() {
+	if len(os.Args) != 2 {
+		log.Println("Usage: " + os.Args[0] + " <queue-config-file>")
+		os.Exit(1)
+	}
+	queueFile := os.Args[1]
+	conf, err := os.ReadFile(queueFile)
+	if err != nil {
+		log.Printf("Could not read file: %v", err)
+		os.Exit(2)
+	}
+	_, err = configs.LoadSchedulerConfigFromByteArray(conf)
+	if err != nil {
+		log.Printf("Config validation failed: %v", err)
+		os.Exit(3)
+	}
+}

pkg/common/configs/config.go

@@ -149,7 +149,6 @@ type NodeSortingPolicy struct {
 	ResourceWeights map[string]float64 `yaml:",omitempty" json:",omitempty"`
 }
 
-// Visible by tests
 func LoadSchedulerConfigFromByteArray(content []byte) (*SchedulerConfig, error) {
 	conf, err := ParseAndValidateConfig(content)
 	if err != nil {