From 2f6bfb30bd1430aa139b85fdf4de08920251bdde Mon Sep 17 00:00:00 2001
From: hugues bouvier <33438817+huguesBouvier@users.noreply.github.com>
Date: Mon, 29 Nov 2021 11:26:26 -0800
Subject: [PATCH] Add delay between nginx crashes (#5852)

Added a delay between nginx restarts to avoid spamming the log file.

## Azure IoT Edge PR checklist:
---
 edge-modules/api-proxy-module/src/main.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/edge-modules/api-proxy-module/src/main.rs b/edge-modules/api-proxy-module/src/main.rs
index bd5cf16c592..4e8190f4f76 100644
--- a/edge-modules/api-proxy-module/src/main.rs
+++ b/edge-modules/api-proxy-module/src/main.rs
@@ -19,6 +19,7 @@ use tokio::{
     process::{Child, Command},
     sync::Notify,
     task::JoinHandle,
+    time,
 };
 
 use api_proxy_module::{
@@ -28,6 +29,8 @@ use api_proxy_module::{
 };
 use shutdown_handle::ShutdownHandle;
 
+const MAX_LOOP_INTERVAL_SECONDS: tokio::time::Duration = tokio::time::Duration::from_secs(1);
+
 #[tokio::main]
 async fn main() -> Result<()> {
     env_logger::builder().filter_level(LevelFilter::Info).init();
@@ -188,6 +191,10 @@ pub fn nginx_controller_start(
                         return Ok(());
                     }
                 }
+
+                // This delay controls how fast the main loop can reconnect once nginx crashed.
+                // Without this, nginx crashes and restart continuously. Rapidly increasing the size of the logs.
+                time::sleep(MAX_LOOP_INTERVAL_SECONDS);
             }
         }
     });