componentstatus: support client cert health check

etcd has support for client-cert-auth, which can be configured via the flag `--ca-file`,
when that is enabled, all the client requests must present with a client certificate,
however, the current component status check uses a single transport for all of the checks,
this is wrong, the checks should be different for each of different component, and make
each of them use different transport(tls configurations).

pkg/probe/http/http.go

@@ -32,7 +32,12 @@ import (
 
 func New() HTTPProber {
 	tlsConfig := &tls.Config{InsecureSkipVerify: true}
-	transport := utilnet.SetTransportDefaults(&http.Transport{TLSClientConfig: tlsConfig, DisableKeepAlives: true})
+	return NewWithTLSConfig(tlsConfig)
+}
+
+// NewWithTLSConfig takes tls config as parameter.
+func NewWithTLSConfig(config *tls.Config) HTTPProber {
+	transport := utilnet.SetTransportDefaults(&http.Transport{TLSClientConfig: config, DisableKeepAlives: true})
 	return httpProber{transport}
 }