From 87972788624b2af9e8b85c50d179500227f85cf5 Mon Sep 17 00:00:00 2001
From: jan <jan.schnaidt@student.reutlingen-university.de>
Date: Tue, 3 Dec 2024 20:22:54 +0100
Subject: [PATCH] Load balancer
---
Caddyfile | 8 +++++---
docker-compose.yml | 11 +++++++----
.../todo/controller/HealthController.java | 14 ++++++++++++++
3 files changed, 26 insertions(+), 7 deletions(-)
create mode 100644 src/main/java/com/cloudcomputing/todo/controller/HealthController.java
diff --git a/Caddyfile b/Caddyfile
index fad2883..02b8af1 100644
--- a/Caddyfile
+++ b/Caddyfile
@@ -2,8 +2,10 @@
root * /usr/share/caddy
file_server
- reverse_proxy /user* {
- to backend_1:9876 backend_2:9877
- lb_policy round_robin
+ reverse_proxy /user* backend1:9876 backend2:9877 {
+ lb_policy first
+ health_uri /health
+ health_interval 10s
+ health_timeout 1s
}
}
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index 042d4a3..eb1e011 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -24,8 +24,8 @@ services:
networks:
- todo-network
- # backend stuff
- backend_1:
+ # backend1
+ backend1:
# builds backend from root
build: .
# the internal network our backend will be using
@@ -46,8 +46,8 @@ services:
depends_on:
- mongodb
- # backend stuff
- backend_2:
+ # backend2
+ backend2:
# builds backend from root
build: .
# the internal network our backend will be using
@@ -79,6 +79,7 @@ services:
networks:
- todo-network
+
# caddy for load balancing and reverse proxying
caddy:
image: caddy/caddy:alpine
@@ -90,6 +91,8 @@ services:
- "80:80" # default http port
networks:
- todo-network
+ depends_on:
+ - frontend
# were gonna use this network for both our backend and frontend
networks:
diff --git a/src/main/java/com/cloudcomputing/todo/controller/HealthController.java b/src/main/java/com/cloudcomputing/todo/controller/HealthController.java
new file mode 100644
index 0000000..b519eca
--- /dev/null
+++ b/src/main/java/com/cloudcomputing/todo/controller/HealthController.java
@@ -0,0 +1,14 @@
+package com.cloudcomputing.todo.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HealthController {
+
+ @GetMapping("/health")
+ public ResponseEntity<Boolean> health() {
+ return ResponseEntity.ok(true);
+ }
+}
--
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