Updating documentation and adding monitor verb and noun.

cmd/monitor.go

@@ -0,0 +1,59 @@
+package cmd
+
+import (
+	"strings"
+	"time"
+
+	"github.com/paypal/gorealis/v2/gen-go/apache/aurora"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(monitorCmd)
+
+	monitorCmd.AddCommand(monitorHostCmd)
+	monitorHostCmd.Flags().DurationVar(&monitorInterval, "interval", time.Second*5, "Interval at which to poll scheduler.")
+	monitorHostCmd.Flags().DurationVar(&monitorTimeout, "timeout", time.Minute*10, "Time after which the monitor will stop polling and throw an error.")
+	monitorHostCmd.Flags().StringSliceVar(&statusList, "statuses", []string{aurora.MaintenanceMode_DRAINED.String()}, "List of acceptable statuses for a host to be in. (case-insensitive) [NONE, SCHEDULED, DRAINED, DRAINING]")
+}
+
+var monitorCmd = &cobra.Command{
+	Use:   "monitor",
+	Short: "Watch for a specific state change",
+}
+
+var monitorHostCmd = &cobra.Command{
+	Use:   "hosts",
+	Short: "Watch a host maintenance status until it enters one of the desired statuses.",
+	Long: `Provide a list of hosts to monitor for desired statuses. Statuses may be passed using the --statuses
+flag with a list of comma separated statuses. Statuses include [NONE, SCHEDULED, DRAINED, DRAINING]`,
+	PreRun: func(cmd *cobra.Command, args []string) {
+		// Manually initializing default values for this command as the default value for shared variables will
+		// be dependent on the order in which all commands were initialized
+		monitorTimeout = time.Minute * 10
+		monitorInterval = time.Second * 5
+	},
+	Run: monitorHost,
+}
+
+func monitorHost(cmd *cobra.Command, args []string) {
+	maintenanceModes := make([]aurora.MaintenanceMode, 0)
+
+	for _, status := range statusList {
+		mode, err := aurora.MaintenanceModeFromString(strings.ToUpper(status))
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		maintenanceModes = append(maintenanceModes, mode)
+	}
+
+	log.Println(monitorTimeout)
+	log.Println(monitorInterval)
+	hostResult, err := client.HostMaintenanceMonitor(args, maintenanceModes, monitorInterval, monitorTimeout)
+
+	maintenanceMonitorPrint(hostResult, maintenanceModes)
+	if err != nil {
+		log.Fatalf("error: %+v", err)
+	}
+}