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Merge branch 'beorn7/fix-deadlock' into beorn7/storage3

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This commit is contained in:
beorn7 2016-02-29 16:37:16 +01:00
commit 536e0bc86b
2 changed files with 11 additions and 4 deletions
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3
documentation/examples/prometheus.yml
View File

@ -14,7 +14,7 @@ rule_files:
# - "first.rules"
# - "second.rules"
# A scrape configuration containing exactly one endpoint to scrape:
# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
# The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
@ -22,7 +22,6 @@ scrape_configs:
# Override the global default and scrape targets from this job every 5 seconds.
scrape_interval: 5s
scrape_timeout: 10s
# metrics_path defaults to '/metrics'
# scheme defaults to 'http'.

12
retrieval/target.go
View File

@ -335,6 +335,7 @@ func (t *Target) path() string {
}
// wrapAppender wraps a SampleAppender for samples ingested from the target.
// RLock must be acquired by the caller.
func (t *Target) wrapAppender(app storage.SampleAppender) storage.SampleAppender {
// The relabelAppender has to be inside the label-modifying appenders
// so the relabeling rules are applied to the correct label set.
@ -348,12 +349,12 @@ func (t *Target) wrapAppender(app storage.SampleAppender) storage.SampleAppender
if t.scrapeConfig.HonorLabels {
app = honorLabelsAppender{
SampleAppender: app,
labels: t.Labels(),
labels: t.unlockedLabels(),
}
} else {
app = ruleLabelsAppender{
SampleAppender: app,
labels: t.Labels(),
labels: t.unlockedLabels(),
}
}
return app
@ -361,6 +362,7 @@ func (t *Target) wrapAppender(app storage.SampleAppender) storage.SampleAppender
// wrapReportingAppender wraps an appender for target status report samples.
// It ignores any relabeling rules set for the target.
// RLock must not be acquired by the caller.
func (t *Target) wrapReportingAppender(app storage.SampleAppender) storage.SampleAppender {
return ruleLabelsAppender{
SampleAppender: app,
@ -647,6 +649,12 @@ func (t *Target) Labels() model.LabelSet {
t.RLock()
defer t.RUnlock()
return t.unlockedLabels()
}
// unlockedLabels does the same as Labels but does not lock the mutex (useful
// for internal usage when the mutex is already locked).
func (t *Target) unlockedLabels() model.LabelSet {
lset := make(model.LabelSet, len(t.labels))
for ln, lv := range t.labels {
if !strings.HasPrefix(string(ln), model.ReservedLabelPrefix) {