Zakhar Bessarab 06947c2685 vmagent: add support of HTTP2 client for Kubernetes SD (#7114) ... ### Describe Your Changes Currently, vmagent always uses a separate `http.Client` for every group watcher in Kubernetes SD. With a high number of group watchers this leads to large amount of opened connections. This PR adds 2 changes to address this: - re-use of existing `http.Client` - in case `http.Client` is connecting to the same API server and uses the same parameters it will be re-used between group watchers - HTTP2 support - this allows to reuse connections more efficiently due to ability of using streaming via existing connections. See this issue for the details and test results - https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5971 ### Checklist The following checks are **mandatory**: - [ ] My change adheres [VictoriaMetrics contributing guidelines](https://docs.victoriametrics.com/contributing/). --------- Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com> Co-authored-by: Roman Khavronenko <roman@victoriametrics.com> (cherry picked from commit eefae85450)		2024-10-08 10:37:48 +02:00
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testdata
api_watcher_test.go	all: consistently use 'any' instead of 'interface{}'	2024-07-10 00:23:26 +02:00
api_watcher.go	vmagent: add support of HTTP2 client for Kubernetes SD (#7114)	2024-10-08 10:37:48 +02:00
api.go
common_types.go
endpoints_test.go
endpoints.go	lib/promscrape/discovery/kubernetes: do not generate targets for already terminated pods and containers	2024-01-24 14:58:51 +02:00
endpointslice_test.go	lib: consistently use f-tests instead of table-driven tests	2024-07-09 22:39:13 +02:00
endpointslice.go	lib/promscrape/discovery/kubernetes: do not generate targets for already terminated pods and containers	2024-01-24 14:58:51 +02:00
ingress_test.go
ingress.go
kubeconfig_test.go
kubeconfig.go	lib: consistently use f-tests instead of table-driven tests	2024-07-09 22:39:13 +02:00
kubernetes.go	all: consistently use 'any' instead of 'interface{}'	2024-07-10 00:23:26 +02:00
node_test.go
node.go
pod_test.go	lib/promscrape/discovery/kubernetes: do not generate targets for already terminated pods and containers	2024-01-24 14:58:51 +02:00
pod_timing_test.go
pod.go	lib/promscrape/discovery/kubernetes: typo fix in the comment for ContainerStateTerminated struct	2024-01-24 15:10:47 +02:00
service_test.go
service.go