mirror of https://github.com/pulumi/pulumi.git
70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
// Copyright 2016-2022, Pulumi Corporation.
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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 rpcutil
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import (
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"context"
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"time"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/credentials/insecure"
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healthpb "google.golang.org/grpc/health/grpc_health_v1"
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"google.golang.org/grpc/status"
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)
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// Healthcheck will poll the address at duration intervals and then call cancel once it reports unhealthy
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func Healthcheck(context context.Context, addr string, duration time.Duration, cancel context.CancelFunc) error {
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conn, err := grpc.NewClient(
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addr,
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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grpc.WithUnaryInterceptor(OpenTracingClientInterceptor()),
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grpc.WithStreamInterceptor(OpenTracingStreamClientInterceptor()),
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GrpcChannelOptions(),
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)
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if err != nil {
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return err
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}
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health := healthpb.NewHealthClient(conn)
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go func() {
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timer := time.NewTimer(duration)
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for {
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select {
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case <-timer.C:
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// Time to check the health status
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req := &healthpb.HealthCheckRequest{}
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_, err := health.Check(context, req)
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// Treat unimplemented as ok. We just want to check the engine looks alive.
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if err != nil && status.Code(err) != codes.Unimplemented {
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// Any other err should trigger the cancellation
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cancel()
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return
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}
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// TODO Should we cancel if the response is HealthCheckResponse_NOT_SERVING?
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// Restart the timer and wait again
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timer.Reset(duration)
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case <-context.Done():
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// Context is done, time to quit
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return
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}
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}
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}()
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return nil
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}
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