github.com/google/cloudprober@v0.11.3/targets/gce/gce_utils.go (about)

     1  // Copyright 2017-2019 The Cloudprober Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package gce
    16  
    17  import (
    18  	"context"
    19  	"errors"
    20  	"fmt"
    21  	"strings"
    22  
    23  	"github.com/golang/protobuf/proto"
    24  	rdspb "github.com/google/cloudprober/rds/proto"
    25  	configpb "github.com/google/cloudprober/targets/gce/proto"
    26  	dnsRes "github.com/google/cloudprober/targets/resolver"
    27  	"golang.org/x/oauth2/google"
    28  	compute "google.golang.org/api/compute/v1"
    29  )
    30  
    31  // defaultComputeService returns the compute service to use for the GCE API
    32  // calls.
    33  func defaultComputeService(apiVersion string) (*compute.Service, error) {
    34  	client, err := google.DefaultClient(context.TODO(), compute.ComputeScope)
    35  	if err != nil {
    36  		return nil, err
    37  	}
    38  	cs, err := compute.New(client)
    39  	if err != nil {
    40  		return nil, err
    41  	}
    42  	cs.BasePath = "https://www.googleapis.com/compute/" + apiVersion + "/projects/"
    43  	return cs, nil
    44  }
    45  
    46  // Utility function to parse "<key>:<value>" style strings into RDS style
    47  // label filters.
    48  func parseLabels(sl []string) ([]*rdspb.Filter, error) {
    49  	var result []*rdspb.Filter
    50  	for _, s := range sl {
    51  		tokens := strings.Split(s, ":")
    52  		if len(tokens) != 2 {
    53  			return nil, fmt.Errorf("invalid label definition: %s", s)
    54  		}
    55  		result = append(result, &rdspb.Filter{
    56  			Key:   proto.String("labels." + tokens[0]),
    57  			Value: proto.String(tokens[1]),
    58  		})
    59  	}
    60  	return result, nil
    61  }
    62  
    63  // Instances resource type related utilities.
    64  // ========================================
    65  
    66  func instancesIPConfig(ipb *configpb.Instances) *rdspb.IPConfig {
    67  	ipTypeMap := map[string]rdspb.IPConfig_IPType{
    68  		"PRIVATE": rdspb.IPConfig_DEFAULT,
    69  		"PUBLIC":  rdspb.IPConfig_PUBLIC,
    70  		"ALIAS":   rdspb.IPConfig_ALIAS,
    71  	}
    72  
    73  	return &rdspb.IPConfig{
    74  		NicIndex: proto.Int32(ipb.GetNetworkInterface().GetIndex()),
    75  		IpType:   ipTypeMap[ipb.GetNetworkInterface().GetIpType().String()].Enum(),
    76  	}
    77  }
    78  
    79  func verifyInstancesConfig(ipb *configpb.Instances, globalResolver *dnsRes.Resolver) error {
    80  	if ipb.GetUseDnsToResolve() {
    81  		if ipb.GetNetworkInterface() != nil {
    82  			return errors.New("network_intf and use_dns_to_resolve are mutually exclusive")
    83  		}
    84  		if globalResolver == nil {
    85  			return errors.New("use_dns_to_resolve configured, but globalResolver is nil")
    86  		}
    87  	}
    88  	return nil
    89  }