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9eaf824398
* add jaeger support, link hot container & req span * adds jaeger support now with FN_JAEGER_URL, there's a simple tutorial in the operating/metrics.md file now and it's pretty easy to get up and running. * links a hot request span to a hot container span. when we change this to sample at a lower ratio we'll need to finagle the hot container span to always sample or something, otherwise we'll hide that info. at least, since we're sampling at 100% for now if this is flipped on, can see freeze/unfreeze etc. if they hit. this is useful for debugging. note that zipkin's exporter does not follow the link at all, hence jaeger... and they're backed by the Cloud Empire now (CNCF) so we'll probably use it anyway. * vendor: add thrift for jaeger
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gensupport
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import (
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"io"
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"time"
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)
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// errReader reads out of a buffer until it is empty, then returns the specified error.
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type errReader struct {
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buf []byte
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err error
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}
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func (er *errReader) Read(p []byte) (int, error) {
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if len(er.buf) == 0 {
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if er.err == nil {
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return 0, io.EOF
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}
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return 0, er.err
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}
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n := copy(p, er.buf)
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er.buf = er.buf[n:]
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return n, nil
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}
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// UniformPauseStrategy implements BackoffStrategy with uniform pause.
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type UniformPauseStrategy time.Duration
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func (p UniformPauseStrategy) Pause() (time.Duration, bool) { return time.Duration(p), true }
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func (p UniformPauseStrategy) Reset() {}
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// NoPauseStrategy implements BackoffStrategy with infinite 0-length pauses.
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const NoPauseStrategy = UniformPauseStrategy(0)
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// LimitRetryStrategy wraps a BackoffStrategy but limits the number of retries.
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type LimitRetryStrategy struct {
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Max int
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Strategy BackoffStrategy
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n int
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}
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func (l *LimitRetryStrategy) Pause() (time.Duration, bool) {
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l.n++
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if l.n > l.Max {
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return 0, false
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}
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return l.Strategy.Pause()
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}
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func (l *LimitRetryStrategy) Reset() {
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l.n = 0
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l.Strategy.Reset()
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}
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