From 50201f0a991cb3fc9db42fbecf929091150b0874 Mon Sep 17 00:00:00 2001
From: zstadler <zeev.stadler@gmail.com>
Date: Mon, 7 Nov 2022 04:30:55 +0200
Subject: [PATCH] Add Docker Healthcheck (#636)

* Add Docker Healthcheck

Fixes #635

* Update Dockerfile_light

* Update healthcheck.js

fix healthcheck output error: "file:///usr/src/app/src/healthcheck.js:1\nvar http = require(\"http\");\n           ^\n\nReferenceError: require is not defined in ES module scope, you can use import instead\nThis file is being treated as an ES module because it has a '.js' file extension and '/usr/src/app/package.json' contains \"type\": \"module\". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.\n    at file:///usr/src/app/src/healthcheck.js:1:12\n    at ModuleJob.run (node:internal/modules/esm/module_job:193:25)\n    at async Promise.all (index 0)\n    at async ESMLoader.import (node:internal/modules/esm/loader:526:24)\n    at async loadESM (node:internal/process/esm_loader:91:5)\n    at async handleMainPromise (node:internal/modules/run_main:65:12)\n"

* update version

Co-authored-by: acalcutt <acalcutt@techidiots.net>
---
 Dockerfile         |  2 ++
 Dockerfile_light   |  1 +
 package-lock.json  |  4 ++--
 package.json       |  2 +-
 src/healthcheck.js | 18 ++++++++++++++++++
 5 files changed, 24 insertions(+), 3 deletions(-)
 create mode 100644 src/healthcheck.js

diff --git a/Dockerfile b/Dockerfile
index 7f50b00..8460f46 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -81,3 +81,5 @@ EXPOSE 80
 USER node:node
 
 ENTRYPOINT ["/usr/src/app/docker-entrypoint.sh"]
+
+HEALTHCHECK CMD node /usr/src/app/src/healthcheck.js
diff --git a/Dockerfile_light b/Dockerfile_light
index a452e53..ed488ef 100644
--- a/Dockerfile_light
+++ b/Dockerfile_light
@@ -32,3 +32,4 @@ COPY / /usr/src/app
 RUN cd /usr/src/app && npm install --omit=dev
 RUN ["chmod", "+x", "/usr/src/app/docker-entrypoint.sh"]
 USER node:node
+HEALTHCHECK CMD node /usr/src/app/src/healthcheck.js
diff --git a/package-lock.json b/package-lock.json
index 29234c5..d2416b6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "tileserver-gl",
-  "version": "4.1.2",
+  "version": "4.1.3",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "tileserver-gl",
-      "version": "4.1.2",
+      "version": "4.1.3",
       "license": "BSD-2-Clause",
       "dependencies": {
         "@mapbox/glyph-pbf-composite": "0.0.3",
diff --git a/package.json b/package.json
index a037263..ff4beae 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tileserver-gl",
-  "version": "4.1.2",
+  "version": "4.1.3",
   "description": "Map tile server for JSON GL styles - vector and server side generated raster tiles",
   "main": "src/main.js",
   "bin": "src/main.js",
diff --git a/src/healthcheck.js b/src/healthcheck.js
new file mode 100644
index 0000000..11d11f9
--- /dev/null
+++ b/src/healthcheck.js
@@ -0,0 +1,18 @@
+import * as http from 'http';
+var options = {
+  timeout: 2000,
+};
+var url = "http://localhost:80/health";
+var request = http.request(url, options, (res) => {
+  console.log(`STATUS: ${res.statusCode}`);
+  if (res.statusCode == 200) {
+    process.exit(0);
+  } else {
+    process.exit(1);
+  }
+});
+request.on("error", function (err) {
+  console.log("ERROR");
+  process.exit(1);
+});
+request.end();