out_stackdriver: Initialize the metadata_server value to NULL

Signed-off-by: Deepak Raja <[email protected]>

Author: Deepak Raja

plugins/out_stackdriver/stackdriver.c

@@ -2426,7 +2426,7 @@ static struct flb_config_map config_map[] = {
      "Set the path for the google service credentials file"
     },
     {
-     FLB_CONFIG_MAP_STR, "metadata_server", FLB_STD_METADATA_SERVER,
+     FLB_CONFIG_MAP_STR, "metadata_server", (char *)NULL,
      0, FLB_TRUE, offsetof(struct flb_stackdriver, metadata_server),
      "Set the metadata server"
     },

plugins/out_stackdriver/stackdriver_conf.c

@@ -275,6 +275,9 @@ struct flb_stackdriver *flb_stackdriver_conf_create(struct flb_output_instance *
             ctx->env->metadata_server = flb_sds_create(tmp);
             ctx->metadata_server = ctx->env->metadata_server;
         }
+        else {
+            ctx->metadata_server = flb_sds_create(FLB_STD_METADATA_SERVER);
+        }
     }
     flb_plg_info(ctx->ins, "metadata_server set to %s", ctx->metadata_server);