Add basic apps to test

.github/workflows/.gitignore

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+__pycache__/
+*.py[cod]
+
+.cache
+.coverage
+build
+dist
+specification
+*.egg-info
+tmp/
+var/
+.DS_Store
+*.swp
+.eggs
+*.gfs
+.venv
+.vscode
+
+tf/*/.terraform*
+tf/**/tfplan
+
+/.python-version
+.idea
+
+node_modules
+
+.editorconfig
+pyrightconfig.json
+tags
+__pycache__
+.mypy_cache
+
+.env
+.env.test
+.db-data
+static
+
+docker-compose.override.yml
+.junitxml
+.envrc
+.env.staging
+.env.sandbox
+.env.production
+coverage.xml
+.secrets

server.js

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+const express = require('express')
+const tests = require('./tests')
+const {createLogger, transports, format} = require('winston')
+
+const logger = createLogger({
+    level: 'info',
+    format: format.json(),
+    defaultMeta: {service: 'status'},
+    transports: [new transports.Console()],
+});
+
+const app = express()
+
+app.get('/', (req, res) => {
+    Promise.all(tests.map(test => new Promise((resolve) => {
+        test.check().then(result => {
+            resolve([test.print, {status: result ? 'success' : 'failure', result}])
+        }).catch(error => {
+            logger.error('error', {
+                test: test.print,
+                error,
+            });
+            resolve([test.print, {status: 'failure', error: error.message}])
+        })
+    }))).then(checks => {
+        if (checks.filter(([_, v]) => v.status === 'failure').length) res.statusCode = 500
+
+        logger.info(res.statusCode === 500 ? 'failure' : 'success', {
+            results: Object.fromEntries(checks),
+        });
+        res.json(Object.fromEntries(checks));
+    })
+})
+
+app.get('/health', (req, res) => {
+    logger.info('healthcheck');
+    res.status(200).json({applicationHealth: 'ok'})
+})
+
+app.listen(process.env.PORT || 80, () => {
+    logger.info(`Status application listening on port ${process.env.PORT || 80}`);
+})

tests.js

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+const {readFileSync} = require("fs");
+const {join} = require("path");
+const {Client} = require("pg");
+const {S3, STS} = require("aws-sdk");
+
+module.exports = [{
+    print: "DEPLOYMENT:TIME",
+    check: async () => readFileSync(join(process.cwd(), 'DEPLOY_TIME'), 'utf-8').replace('\n', ''),
+}, {
+    print: "DB:READ",
+    check: async () => {
+        const client = new Client({connectionString: process.env.READ_DATABASE_URL});
+        await client.connect();
+        await client.end();
+        return true;
+    },
+}, {
+    print: "DB:WRITE",
+    check: async () => {
+        const client = new Client({connectionString: process.env.WRITE_DATABASE_URL});
+        await client.connect();
+        await client.end();
+        return true;
+    },
+}, {
+    print: "BUCKET:READ",
+    check: async () => {
+        const client = new S3({region: 'eu-west-2'});
+        await client.getObject({Bucket: process.env.COLLECTION_DATA_BUCKET, Key: 'index.html'}).promise();
+        return true;
+    },
+}, {
+    print: "ROLE:APPLICATION",
+    check: async () => {
+        const client = new STS({region: 'eu-west-2'});
+        const response = await client.getCallerIdentity({}).promise();
+        return response.Arn.indexOf('task-application-role') !== -1;
+    },
+}]