AppEngine NodeJS flexible memcache未定义的GAE_MEMCACHE_HOST和GAE_MEMCACHE_PORT

Question

我想在我的NodeJS灵活环境中使用memcache AppEngine服务。正如文档中所指定的：https://cloud.google.com/appengine/docs/flexible/nodejs/using-redislabs-memcache

我使用了建议的app.yaml文件，对USE_GAE_MEMCACHE: 1进行了分解，并注释了其他变量。但是当我运行我的部署命令时，它失败了，并显示以下错误：

net.js:1048
      throw new RangeError('"port" option should be >= 0 and < 65536: ' + port);
      ^

RangeError: "port" option should be >= 0 and < 65536: NaN
    at lookupAndConnect (net.js:1048:13)
    at Socket.connect (net.js:1021:5)
    at Object.connect (net.js:113:35)
    at Server.sock (/app/node_modules/memjs/lib/memjs/server.js:120:24)
    at Server.write (/app/node_modules/memjs/lib/memjs/server.js:219:8)
    at handleFlush (/app/node_modules/memjs/lib/memjs/memjs.js:620:10)
    at Client.flush (/app/node_modules/memjs/lib/memjs/memjs.js:624:5)
    at MemcachedDriver.flush (/app/data_manager/memcached_driver.js:42:17)
    at Storage.intialize (/app/data_manager/storage.js:45:12)
    at Object.<anonymous> (/app/app.js:22:9)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! waternamics@1.0.0 start: `node ./bin/www`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the waternamics@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2018-07-26T14_39_48_624Z-debug.log

当我记录MEMCACHE_URL变量时，它会显示: undefined:undefined以下是我用来连接到memcache的代码：

let MEMCACHE_URL = process.env.MEMCACHE_URL || '127.0.0.1:11211';

    if (process.env.USE_GAE_MEMCACHE) {
        MEMCACHE_URL = `${process.env.GAE_MEMCACHE_HOST}:${process.env.GAE_MEMCACHE_PORT}`;
    }

    this.client = Memcached.Client.create(MEMCACHE_URL);

我不知道为什么它不工作，它在文档中说明它是alpha，但它应该工作，不是吗？

Answer 1

要在App Engine flex中使用Memcache，您需要注册此表单才能访问alpha。[Memcache flex form](https://docs.google.com/a/google.com/forms/d/e/1FAIpQLSfGMYNeKC0G5aw6GEiocL1DjT2H5AFUCqsbxoerfuj3Y1rHxw/viewform?c=0&w=1)。

或者，您可以选择设置自己的Memcache (Redis等)或将Memcache用于App Engine标准环境。