54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cloudinfo
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import (
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/ec2metadata"
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"github.com/aws/aws-sdk-go/aws/session"
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info "github.com/google/cadvisor/info/v1"
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)
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func onAWS() bool {
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// the default client behavior retried the operation multiple times with a 5s timeout per attempt.
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// if you were not on aws, you would block for 20s when invoking this operation.
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// we reduce retries to 0 and set the timeout to 2s to reduce the time this blocks when not on aws.
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client := ec2metadata.New(session.New(&aws.Config{MaxRetries: aws.Int(0)}))
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if client.Config.HTTPClient != nil {
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client.Config.HTTPClient.Timeout = time.Duration(2 * time.Second)
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}
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return client.Available()
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}
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func getAwsMetadata(name string) string {
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client := ec2metadata.New(session.New(&aws.Config{}))
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data, err := client.GetMetadata(name)
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if err != nil {
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return info.UnknownInstance
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}
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return data
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}
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func getAwsInstanceType() info.InstanceType {
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return info.InstanceType(getAwsMetadata("instance-type"))
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}
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func getAwsInstanceID() info.InstanceID {
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return info.InstanceID(getAwsMetadata("instance-id"))
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}
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