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Merge pull request #36702 from fabxc/client-metrics 

Automatic merge from submit-queue (batch tested with PRs 37701, 36702, 37145, 37424, 38261)

Limit unbound label cardinality on request errors

This converts all request errors to the string `<error>` instead of
passing the full error string. Error strings can have arbitrary values
and thus have a cardinality that is not suitable for a metric
use case.

Inspecting individual errors is a logging use case which can be handled separately by registering a client error handler.

@kubernetes/sig-instrumentation
pull/6/head
Kubernetes Submit Queue 2016-12-08 04:39:20 -08:00 committed by GitHub
parent b121411f91 a247736f2a
commit 1199d42210
1 changed files with 3 additions and 2 deletions
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5
pkg/client/restclient/request.go
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@ -694,9 +694,10 @@ func updateURLMetrics(req *Request, resp *http.Response, err error) {
url = req.baseURL.Host
}
// If we have an error (i.e. apiserver down) we report that as a metric label.
// Errors can be arbitrary strings. Unbound label cardinality is not suitable for a metric
// system so we just report them as `<error>`.
if err != nil {
metrics.RequestResult.Increment(err.Error(), req.verb, url)
metrics.RequestResult.Increment("<error>", req.verb, url)
} else {
//Metrics for failure codes
metrics.RequestResult.Increment(strconv.Itoa(resp.StatusCode), req.verb, url)