mongodb: do not apply memory limit when no avx

src/services.js

@@ -281,6 +281,12 @@ function requiresUpgrade(existingObjOrImageName, currentImageName) {
     return etag.version.major !== ctag.version.major;
 }
 
+async function hasAVX() {
+    // mongodb 5 and above requires AVX
+    const [error] = await safe(shell.exec('hasAVX', 'grep -q avx /proc/cpuinfo', {}));
+    return !error;
+}
+
 // paths for dumps
 function dumpPath(addon, appId) {
     switch (addon) {
@@ -763,6 +769,11 @@ async function applyMemoryLimit(id) {
         containerName = `${name}-${instance}`;
         memoryLimit = serviceConfig && serviceConfig.memoryLimit ? serviceConfig.memoryLimit : APP_SERVICES[name].defaultMemoryLimit;
     } else if (SERVICES[name]) {
+        if (name === 'mongodb' && !await hasAVX()) {
+            debug('applyMemoryLimit: skipping mongodb because CPU does not have AVX');
+            return;
+        }
+
         containerName = name;
         memoryLimit = serviceConfig && serviceConfig.memoryLimit ? serviceConfig.memoryLimit : SERVICES[name].defaultMemoryLimit;
     } else {
@@ -1488,12 +1499,6 @@ async function restorePostgreSql(app, options) {
     await pipeFileToRequest(dumpPath('postgresql', app.id), `http://${result.ip}:3000/databases/${database}/restore?access_token=${result.token}&username=${username}`);
 }
 
-async function hasAVX() {
-    // mongodb 5 and above requires AVX
-    const [error] = await safe(shell.exec('hasAVX', 'grep -q avx /proc/cpuinfo', {}));
-    return !error;
-}
-
 async function startMongodb(existingInfra) {
     assert.strictEqual(typeof existingInfra, 'object');