elasticsearch: add known unhandled libbeat config (elastic#3800)

elasticsearch/config_test.go

@@ -18,6 +18,7 @@
 package elasticsearch
 
 import (
+ "fmt"
  "net/http"
  "net/http/httptest"
  "os"
@@ -143,6 +144,29 @@ func TestBeatsConfigSynced(t *testing.T) {
  require.Contains(t, libbeatStructFields, name)
  libbeatStructField := libbeatStructFields[name]
  assert.Equal(t, localStructField.structTag, libbeatStructField.structTag)
- assert.Equal(t, localStructField.Type(), libbeatStructField.Type())
+ assert.Equal(t,
+ localStructField.Type(),
+ libbeatStructField.Type(),
+ fmt.Sprintf("expected type %s for config field %q, got %s",
+ libbeatStructField.Type(), name, localStructField.Type(),
+ ),
+ )
+ delete(libbeatStructFields, name)
+ }
+
+ knownUnhandled := []string{
+ "backoff",
+ "bulk_max_size",
+ "compression_level",
+ "escape_html",
+ "headers",
+ // TODO Kerberos auth (https:/elastic/apm-server/issues/3794)
+ "kerberos",
+ "loadbalance",
+ "max_retries",
+ "parameters",
+ }
+ for name := range libbeatStructFields {
+ assert.Contains(t, knownUnhandled, name)
  }
 }