forked from GoogleCloudPlatform/k8s-stackdriver
/
gce_config.go
67 lines (54 loc) · 1.72 KB
/
gce_config.go
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/*
Copyright 2017 The Kubernetes Authors.
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 config
import (
"fmt"
gce "cloud.google.com/go/compute/metadata"
)
// GceConfig aggregates all GCE related configuration parameters.
type GceConfig struct {
Project string
Zone string
Cluster string
Instance string
MetricsPrefix string
}
// GetGceConfig builds GceConfig based on the provided prefix and metadata server available on GCE.
func GetGceConfig(metricsPrefix string) (*GceConfig, error) {
if !gce.OnGCE() {
return nil, fmt.Errorf("Not running on GCE.")
}
project, err := gce.ProjectID()
if err != nil {
return nil, fmt.Errorf("error while getting project id: %v", err)
}
zone, err := gce.Zone()
if err != nil {
return nil, fmt.Errorf("error while getting zone: %v", err)
}
cluster, err := gce.InstanceAttributeValue("cluster-name")
if err != nil {
return nil, fmt.Errorf("error while getting cluster name: %v", err)
}
instance, err := gce.Hostname()
if err != nil {
return nil, fmt.Errorf("error while getting instance hostname: %v", err)
}
return &GceConfig{
Project: project,
Zone: zone,
Cluster: cluster,
Instance: instance,
MetricsPrefix: metricsPrefix,
}, nil
}