php-fpm: preinstall wp-cli, add WP-independent healthcheck

2025-12-09 13:30:27 -08:00
parent 238d3244b2
commit 0d00fd2ac4
4 changed files with 131 additions and 5 deletions
--- a/shared/php-fpm/healthcheck.php
+++ b/shared/php-fpm/healthcheck.php
@@ -0,0 +1,94 @@
+<?php
+// healthcheck.php
+// Lightweight readiness probe independent of WordPress code.
+
+header('Content-Type: application/json');
+header('Cache-Control: no-store, no-cache, must-revalidate');
+
+$response = [
+    'status' => 'ok',
+    'php_version' => PHP_VERSION,
+    'checks' => [],
+];
+$httpStatus = 200;
+
+// Filesystem/webroot probe
+$webroot = '/var/www/html';
+$fsStatus = [
+    'name' => 'filesystem',
+    'status' => 'ok',
+    'detail' => 'Webroot mounted',
+];
+if (!is_dir($webroot)) {
+    $fsStatus['status'] = 'error';
+    $fsStatus['detail'] = 'Missing /var/www/html mount';
+    $httpStatus = 503;
+} elseif (!is_readable($webroot)) {
+    $fsStatus['status'] = 'error';
+    $fsStatus['detail'] = 'Webroot not readable';
+    $httpStatus = 503;
+}
+$response['checks'][] = $fsStatus;
+
+// Database probe (optional if env vars missing)
+$requiredEnv = ['WORDPRESS_DB_HOST', 'WORDPRESS_DB_USER', 'WORDPRESS_DB_PASSWORD', 'WORDPRESS_DB_NAME'];
+$dbConfig = [];
+$missingEnv = [];
+foreach ($requiredEnv as $var) {
+    $value = getenv($var);
+    if ($value === false || $value === '') {
+        $missingEnv[] = $var;
+    } else {
+        $dbConfig[$var] = $value;
+    }
+}
+
+$dbStatus = [
+    'name' => 'database',
+    'status' => 'skipped',
+    'detail' => 'Database env vars missing',
+];
+
+if (empty($missingEnv)) {
+    [$host, $port] = (function (string $rawHost): array {
+        if (preg_match('/^\[(.+)\](?::(\d+))?$/', $rawHost, $matches)) {
+            return [$matches[1], isset($matches[2]) ? (int) $matches[2] : 3306];
+        }
+        if (substr_count($rawHost, ':') === 1 && strpos($rawHost, '::') === false) {
+            [$h, $p] = explode(':', $rawHost, 2);
+            return [$h, (int) $p];
+        }
+        return [$rawHost, 3306];
+    })($dbConfig['WORDPRESS_DB_HOST']);
+
+    $mysqli = @mysqli_init();
+    if ($mysqli !== false) {
+        @mysqli_options($mysqli, MYSQLI_OPT_CONNECT_TIMEOUT, 3);
+        $connected = @$mysqli->real_connect(
+            $host,
+            $dbConfig['WORDPRESS_DB_USER'],
+            $dbConfig['WORDPRESS_DB_PASSWORD'],
+            $dbConfig['WORDPRESS_DB_NAME'],
+            $port
+        );
+        if ($connected) {
+            $dbStatus['status'] = 'ok';
+            $dbStatus['detail'] = 'DB connection OK';
+            $mysqli->close();
+        } else {
+            $dbStatus['status'] = 'error';
+            $dbStatus['detail'] = sprintf('DB connect failed: %s', $mysqli->connect_error ?? 'unknown error');
+            $httpStatus = 503;
+        }
+    } else {
+        $dbStatus['status'] = 'error';
+        $dbStatus['detail'] = 'Unable to init mysqli';
+        $httpStatus = 503;
+    }
+} else {
+    $dbStatus['detail'] = 'Missing env: ' . implode(', ', $missingEnv);
+}
+$response['checks'][] = $dbStatus;
+
+http_response_code($httpStatus);
+echo json_encode($response, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . "\n";