[DEPLOY] nginx 무중단 배포 설정

appspec.yml

@@ -13,11 +13,13 @@ permissions:
     group: ubuntu
 
 hooks:
-  AfterInstall:
-    - location: scripts/stop.sh
-      timeout: 60
-      runas: ubuntu
   ApplicationStart:
-    - location: scripts/start.sh
-      timeout: 60
-      runas: ubuntu
+    - location: scripts/run_new_was.sh
+      timeout: 180
+      runas: ubuntu
+    - location: scripts/health_check.sh
+      timeout: 180
+      runas: ubuntu
+    - location: scripts/switch.sh
+      timeout: 180
+      runas: ubuntu

scripts/health_check.sh

@@ -0,0 +1,35 @@
+# health_check.sh
+
+#!/bin/bash
+
+# Crawl current connected port of WAS
+CURRENT_PORT=$(cat /home/ubuntu/service_url.inc | grep -Po '[0-9]+' | tail -1)
+TARGET_PORT=0
+
+# Toggle port Number
+if [ ${CURRENT_PORT} -eq 8081 ]; then
+    TARGET_PORT=8082
+elif [ ${CURRENT_PORT} -eq 8082 ]; then
+    TARGET_PORT=8081
+else
+    echo "> No WAS is connected to nginx"
+    exit 1
+fi
+
+
+echo "> Start health check of WAS at 'http://127.0.0.1:${TARGET_PORT}' ..."
+
+for RETRY_COUNT in 1 2 3 4 5 6 7 8 9 10
+do
+    echo "> #${RETRY_COUNT} trying..."
+    RESPONSE_CODE=$(curl -s -o /dev/null -w "%{http_code}"  http://127.0.0.1:${TARGET_PORT}/health)
+
+    if [ ${RESPONSE_CODE} -eq 200 ]; then
+        echo "> New WAS successfully running"
+        exit 0
+    elif [ ${RETRY_COUNT} -eq 10 ]; then
+        echo "> Health check failed."
+        exit 1
+    fi
+    sleep 10
+done

scripts/nun_new_was.sh

@@ -0,0 +1,31 @@
+# run_new_was.sh
+
+#!/bin/bash
+
+CURRENT_PORT=$(cat /home/ubuntu/service_url.inc | grep -Po '[0-9]+' | tail -1)
+TARGET_PORT=0
+
+echo "> Current port of running WAS is ${CURRENT_PORT}."
+
+if [ ${CURRENT_PORT} -eq 8081 ]; then
+  TARGET_PORT=8082
+elif [ ${CURRENT_PORT} -eq 8082 ]; then
+  TARGET_PORT=8081
+else
+  echo "> No WAS is connected to nginx"
+fi
+
+TARGET_PID=$(lsof -Fp -i TCP:${TARGET_PORT} | grep -Po 'p[0-9]+' | grep -Po '[0-9]+')
+
+if [ ! -z ${TARGET_PID} ]; then
+  echo "> Kill WAS running at ${TARGET_PORT}."
+  sudo kill ${TARGET_PID}
+fi
+
+nohup java -jar \
+        -Dserver.port=${TARGET_PORT} \
+        -Dspring.config.location=/home/ubuntu/app/application.yml \
+        /home/ubuntu/app/build/libs/* > /home/ubuntu/nohup.out 2>&1 &
+echo "> Now new WAS runs at ${TARGET_PORT}."
+sleep 10s
+exit 0

scripts/switch.sh

@@ -0,0 +1,29 @@
+# switch.sh
+
+#!/bin/bash
+
+# Crawl current connected port of WAS
+CURRENT_PORT=$(cat /home/ubuntu/service_url.inc  | grep -Po '[0-9]+' | tail -1)
+TARGET_PORT=0
+
+echo "> Nginx currently proxies to ${CURRENT_PORT}."
+
+# Toggle port number
+if [ ${CURRENT_PORT} -eq 8081 ]; then
+    TARGET_PORT=8082
+elif [ ${CURRENT_PORT} -eq 8082 ]; then
+    TARGET_PORT=8081
+else
+    echo "> No WAS is connected to nginx"
+    exit 1
+fi
+
+# Change proxying port into target port
+echo "set \$service_url http://127.0.0.1:${TARGET_PORT};" | tee /home/ubuntu/service_url.inc
+
+echo "> Now Nginx proxies to ${TARGET_PORT}."
+
+# Reload nginx
+sudo service nginx reload
+
+echo "> Nginx reloaded."

src/main/java/com/favoriteplace/app/controller/HealthCheckController.java

@@ -0,0 +1,17 @@
+package com.favoriteplace.app.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HealthCheckController {
+
+    @GetMapping("/health")
+    public String hello(){
+        return "hello success!";
+    }
+
+}