in_kubernetes_events: add support for configuring input upstream network setup

- pass the input net_setup into network_init to reuse configured options
- apply flb_input_upstream_set so the upstream inherits the input context

Author: slab-msft

plugins/in_kubernetes_events/kubernetes_events_conf.c

@@ -89,7 +89,7 @@ static int flb_kubernetes_event_db_close(struct flb_sqldb *db)
 
 #endif
 
-static int network_init(struct k8s_events *ctx, struct flb_config *config)
+static int network_init(struct k8s_events *ctx, struct flb_config *config, struct flb_net_setup *net)
 {
     int io_type = FLB_IO_TCP;
 
@@ -128,6 +128,13 @@ static int network_init(struct k8s_events *ctx, struct flb_config *config)
         return -1;
     }
 
+    if (flb_input_upstream_set(ctx->upstream, ctx->ins) != 0) {
+        flb_plg_error(ctx->ins, "network upstream setup failed");
+        flb_upstream_destroy(ctx->upstream);
+        ctx->upstream = NULL;
+        return -1;
+    }
+
     return 0;
 }
 
@@ -218,7 +225,7 @@ struct k8s_events *k8s_events_conf_create(struct flb_input_instance *ins)
     flb_plg_info(ctx->ins, "API server: %s", ctx->kube_url);
 
     /* network setup */
-    ret = network_init(ctx, ins->config);
+    ret = network_init(ctx, ins->config, &ins->net_setup);
     if (ret == -1) {
         k8s_events_conf_destroy(ctx);
         return NULL;