github.com/vmware/govmomi@v0.37.2/examples/alarms/main.go (about)

     1  /*
     2  Copyright (c) 2014-2022 VMware, Inc. All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"context"
    21  	"flag"
    22  	"fmt"
    23  
    24  	"github.com/dougm/pretty"
    25  
    26  	"github.com/vmware/govmomi/examples"
    27  	"github.com/vmware/govmomi/property"
    28  	"github.com/vmware/govmomi/vim25"
    29  	"github.com/vmware/govmomi/vim25/methods"
    30  	"github.com/vmware/govmomi/vim25/mo"
    31  	"github.com/vmware/govmomi/vim25/types"
    32  )
    33  
    34  func main() {
    35  	var limit int
    36  	flag.IntVar(&limit, "limit", 10, "maximum number of alarms to retrieve")
    37  
    38  	examples.Run(func(ctx context.Context, c *vim25.Client) error {
    39  		pc := property.DefaultCollector(c)
    40  		am := c.ServiceContent.AlarmManager
    41  
    42  		fmt.Println("retrieving all alarms")
    43  		alarms, err := methods.GetAlarm(ctx, c, &types.GetAlarm{
    44  			This:   *am,
    45  			Entity: nil, // if not set, alarms are returned for all visible entities
    46  		})
    47  		if err != nil {
    48  			return fmt.Errorf("could not get alarms: %w", err)
    49  		}
    50  
    51  		counter := 0
    52  		for _, a := range alarms.Returnval {
    53  			counter++
    54  			fmt.Printf("retrieving details for alarm %q\n", a.String())
    55  
    56  			var info mo.Alarm
    57  			if err = pc.RetrieveOne(ctx, a, nil, &info); err != nil {
    58  				return fmt.Errorf("retrieve alarm info: %w", err)
    59  			}
    60  
    61  			_, err = pretty.Println(info)
    62  			if err != nil {
    63  				return fmt.Errorf("print alarm: %w", err)
    64  			}
    65  
    66  			if counter == limit {
    67  				fmt.Printf("reached maximum number of alarms to read (limit=%d)\n", limit)
    68  				break
    69  			}
    70  		}
    71  
    72  		return nil
    73  	})
    74  }