mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-30 07:40:06 +01:00
68 lines
2.3 KiB
Go
68 lines
2.3 KiB
Go
package kubernetes
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"strings"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promauth"
|
|
)
|
|
|
|
// apiConfig contains config for API server
|
|
type apiConfig struct {
|
|
aw *apiWatcher
|
|
}
|
|
|
|
func newAPIConfig(sdc *SDConfig, baseDir string, swcFunc ScrapeWorkConstructorFunc) (*apiConfig, error) {
|
|
switch sdc.Role {
|
|
case "node", "pod", "service", "endpoints", "endpointslices", "ingress":
|
|
default:
|
|
return nil, fmt.Errorf("unexpected `role`: %q; must be one of `node`, `pod`, `service`, `endpoints`, `endpointslices` or `ingress`", sdc.Role)
|
|
}
|
|
ac, err := sdc.HTTPClientConfig.NewConfig(baseDir)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot parse auth config: %w", err)
|
|
}
|
|
apiServer := sdc.APIServer
|
|
if len(apiServer) == 0 {
|
|
// Assume we run at k8s pod.
|
|
// Discover apiServer and auth config according to k8s docs.
|
|
// See https://kubernetes.io/docs/reference/access-authn-authz/service-accounts-admin/#service-account-admission-controller
|
|
host := os.Getenv("KUBERNETES_SERVICE_HOST")
|
|
port := os.Getenv("KUBERNETES_SERVICE_PORT")
|
|
if len(host) == 0 {
|
|
return nil, fmt.Errorf("cannot find KUBERNETES_SERVICE_HOST env var; it must be defined when running in k8s; " +
|
|
"probably, `kubernetes_sd_config->api_server` is missing in Prometheus configs?")
|
|
}
|
|
if len(port) == 0 {
|
|
return nil, fmt.Errorf("cannot find KUBERNETES_SERVICE_PORT env var; it must be defined when running in k8s; "+
|
|
"KUBERNETES_SERVICE_HOST=%q", host)
|
|
}
|
|
apiServer = "https://" + net.JoinHostPort(host, port)
|
|
tlsConfig := promauth.TLSConfig{
|
|
CAFile: "/var/run/secrets/kubernetes.io/serviceaccount/ca.crt",
|
|
}
|
|
acNew, err := promauth.NewConfig(".", nil, nil, "", "/var/run/secrets/kubernetes.io/serviceaccount/token", nil, &tlsConfig)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot initialize service account auth: %w; probably, `kubernetes_sd_config->api_server` is missing in Prometheus configs?", err)
|
|
}
|
|
ac = acNew
|
|
}
|
|
if !strings.Contains(apiServer, "://") {
|
|
proto := "http"
|
|
if sdc.HTTPClientConfig.TLSConfig != nil {
|
|
proto = "https"
|
|
}
|
|
apiServer = proto + "://" + apiServer
|
|
}
|
|
for strings.HasSuffix(apiServer, "/") {
|
|
apiServer = apiServer[:len(apiServer)-1]
|
|
}
|
|
aw := newAPIWatcher(apiServer, ac, sdc, swcFunc)
|
|
cfg := &apiConfig{
|
|
aw: aw,
|
|
}
|
|
return cfg, nil
|
|
}
|