mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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67 lines
2.0 KiB
Go
67 lines
2.0 KiB
Go
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// Copyright 2024 Google LLC
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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 compute
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import (
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"log"
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"runtime"
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"strings"
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"sync"
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)
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var (
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vmOnGCEOnce sync.Once
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vmOnGCE bool
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)
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// OnComputeEngine returns whether the client is running on GCE.
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//
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// This is a copy of the gRPC internal googlecloud.OnGCE() func at:
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// https://github.com/grpc/grpc-go/blob/master/internal/googlecloud/googlecloud.go
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// The functionality is similar to the metadata.OnGCE() func at:
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// https://github.com/xmenxk/google-cloud-go/blob/main/compute/metadata/metadata.go
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//
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// The difference is that OnComputeEngine() does not perform HTTP or DNS check on the metadata server.
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// In particular, OnComputeEngine() will return false on Serverless.
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func OnComputeEngine() bool {
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vmOnGCEOnce.Do(func() {
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mf, err := manufacturer()
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if err != nil {
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log.Printf("Failed to read manufacturer, vmOnGCE=false: %v", err)
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return
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}
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vmOnGCE = isRunningOnGCE(mf, runtime.GOOS)
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})
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return vmOnGCE
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}
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// isRunningOnGCE checks whether the local system, without doing a network request, is
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// running on GCP.
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func isRunningOnGCE(manufacturer []byte, goos string) bool {
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name := string(manufacturer)
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switch goos {
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case "linux":
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name = strings.TrimSpace(name)
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return name == "Google" || name == "Google Compute Engine"
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case "windows":
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name = strings.Replace(name, " ", "", -1)
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name = strings.Replace(name, "\n", "", -1)
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name = strings.Replace(name, "\r", "", -1)
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return name == "Google"
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default:
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return false
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}
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}
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