fetch capacity and simulate task fitting (#33)

cmd/simulate.go

@@ -0,0 +1,61 @@
+/**
+ * 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 cmd
+
+import (
+	"fmt"
+
+	"github.com/aurora-scheduler/australis/internal"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(simulateCmd)
+
+	simulateCmd.AddCommand(fitCmd)
+}
+
+var simulateCmd = &cobra.Command{
+	Use:   "simulate",
+	Short: "Simulate some work based on the current cluster condition, and return the output",
+}
+
+var fitCmd = &cobra.Command{
+	Use:   "fit",
+	Short: "Compute how many tasks can we fit to a cluster",
+	Run:   fit,
+	Args:  cobra.RangeArgs(1, 2),
+}
+
+func fit(cmd *cobra.Command, args []string) {
+	log.Infof("Compute how many tasks can be fit in the remaining cluster capacity")
+
+	taskConfig, err := internal.UnmarshalTaskConfig(args[0])
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	offers, err := client.Offers()
+	if err != nil {
+		log.Fatal("error: %+v", err)
+	}
+
+	numTasks, err := client.FitTasks(taskConfig, offers)
+	if err != nil {
+		log.Fatal("error: %+v", err)
+	}
+
+	fmt.Println(numTasks)
+}