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Merge pull request #106674 from wojtek-t/fix_watch_metrics

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Fix logging resource-scoped watch requests as GET requests.
This commit is contained in:
Kubernetes Prow Robot 2022-01-05 14:55:55 -08:00 committed by GitHub
commit efa9f59f21
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2 changed files with 17 additions and 17 deletions
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22
staging/src/k8s.io/apiserver/pkg/endpoints/metrics/metrics.go
View File

@ -562,7 +562,7 @@ func CanonicalVerb(verb string, scope string) string {
// LIST and APPLY from PATCH.
func CleanVerb(verb string, request *http.Request) string {
reportedVerb := verb
if verb == "LIST" && checkIfWatch(request) {
if suggestedVerb := getVerbIfWatch(request); suggestedVerb == "WATCH" {
reportedVerb = "WATCH"
}
// normalize the legacy WATCHLIST to WATCH to ensure users aren't surprised by metrics
@ -593,27 +593,19 @@ func cleanVerb(verb, suggestedVerb string, request *http.Request) string {
return OtherRequestMethod
}
//getVerbIfWatch additionally ensures that GET or List would be transformed to WATCH
// getVerbIfWatch additionally ensures that GET or List would be transformed to WATCH
func getVerbIfWatch(req *http.Request) string {
if strings.ToUpper(req.Method) == "GET" || strings.ToUpper(req.Method) == "LIST" {
if checkIfWatch(req) {
return "WATCH"
// see apimachinery/pkg/runtime/conversion.go Convert_Slice_string_To_bool
if values := req.URL.Query()["watch"]; len(values) > 0 {
if value := strings.ToLower(values[0]); value != "0" && value != "false" {
return "WATCH"
}
}
}
return ""
}
//checkIfWatch check request is watch
func checkIfWatch(req *http.Request) bool {
// see apimachinery/pkg/runtime/conversion.go Convert_Slice_string_To_bool
if values := req.URL.Query()["watch"]; len(values) > 0 {
if value := strings.ToLower(values[0]); value != "0" && value != "false" {
return true
}
}
return false
}
func cleanDryRun(u *url.URL) string {
// avoid allocating when we don't see dryRun in the query
if !strings.Contains(u.RawQuery, "dryRun") {

12
staging/src/k8s.io/apiserver/pkg/endpoints/metrics/metrics_test.go
View File

@ -49,6 +49,7 @@ func TestCleanVerb(t *testing.T) {
desc: "LIST should be transformed to WATCH if we have the right query param on the request",
initialVerb: "LIST",
request: &http.Request{
Method: "GET",
URL: &url.URL{
RawQuery: "watch=true",
},
@ -59,6 +60,7 @@ func TestCleanVerb(t *testing.T) {
desc: "LIST isn't transformed to WATCH if we have query params that do not include watch",
initialVerb: "LIST",
request: &http.Request{
Method: "GET",
URL: &url.URL{
RawQuery: "blah=asdf&something=else",
},
@ -66,20 +68,25 @@ func TestCleanVerb(t *testing.T) {
expectedVerb: "LIST",
},
{
desc: "GET isn't be transformed to WATCH if we have the right query param on the request",
// The above may seem counter-intuitive, but it actually is needed for cases like
// watching a single item, e.g.:
// /api/v1/namespaces/foo/pods/bar?fieldSelector=metadata.name=baz&watch=true
desc: "GET is transformed to WATCH if we have the right query param on the request",
initialVerb: "GET",
request: &http.Request{
Method: "GET",
URL: &url.URL{
RawQuery: "watch=true",
},
},
expectedVerb: "GET",
expectedVerb: "WATCH",
},
{
desc: "LIST is transformed to WATCH for the old pattern watch",
initialVerb: "LIST",
suggestedVerb: "WATCH",
request: &http.Request{
Method: "GET",
URL: &url.URL{
RawQuery: "/api/v1/watch/pods",
},
@ -91,6 +98,7 @@ func TestCleanVerb(t *testing.T) {
initialVerb: "LIST",
suggestedVerb: "WATCHLIST",
request: &http.Request{
Method: "GET",
URL: &url.URL{
RawQuery: "/api/v1/watch/pods",
},