K8SPSMDB-1296: use direct conn for mongodb-healthcheck

cmd/mongodb-healthcheck/healthcheck/readiness.go

@@ -64,6 +64,7 @@ func MongodReadinessCheck(ctx context.Context, cnf *db.Config) error {
 		var rs mongo.Status
 		rs, err = client.RSStatus(ctx)
 		if err != nil {
+			// We should ignore this error to allow operator to fix the config. This pod should be ready
 			if errors.Is(err, mongo.ErrInvalidReplsetConfig) {
 				log.Info("Couldn't connect to mongo due to invalid replset config. Ignoring", "error", err)
 				return nil, nil

cmd/mongodb-healthcheck/tool/config.go

@@ -93,6 +93,7 @@ func NewConfig(app *kingpin.Application, envUser string, envPassword string) (*d
 	).Envar(EnvMongoDBNetSSLInsecure).BoolVar(&ssl.Insecure)
 
 	conf.SSL = ssl
+	conf.Direct = true
 
 	return conf, nil
 }