First time deploying a GAE app here, I'm trying to follow this tutorial: https://firebase.googleblog.com/2016/08/sending-notifications-between-android.html (see node code section).
I ran
npm install firebase-admin --save
npm install request --save
on my machine, the package.json is here, but when I use gcloud app deploy, I get these logs when opening the app on my browser:
2017-02-10 09:35:02 default[20170210t103151] module.js:471
2017-02-10 09:35:02 default[20170210t103151] throw err;
2017-02-10 09:35:02 default[20170210t103151] ^
2017-02-10 09:35:02 default[20170210t103151]
2017-02-10 09:35:02 default[20170210t103151] Error: Cannot find module 'firebase-admin'
2017-02-10 09:35:02 default[20170210t103151] at Function.Module._resolveFilename (module.js:469:15)
2017-02-10 09:35:02 default[20170210t103151] at Function.Module._load (module.js:417:25)
2017-02-10 09:35:02 default[20170210t103151] at Module.require (module.js:497:17)
2017-02-10 09:35:02 default[20170210t103151] at require (internal/module.js:20:19)
2017-02-10 09:35:02 default[20170210t103151] at Object.<anonymous> (/app/server.js:1:78)
2017-02-10 09:35:02 default[20170210t103151] at Module._compile (module.js:570:32)
2017-02-10 09:35:02 default[20170210t103151] at Object.Module._extensions..js (module.js:579:10)
2017-02-10 09:35:02 default[20170210t103151] at Module.load (module.js:487:32)
2017-02-10 09:35:02 default[20170210t103151] at tryModuleLoad (module.js:446:12)
2017-02-10 09:35:02 default[20170210t103151] at Function.Module._load (module.js:438:3)
2017-02-10 09:35:07 default[20170210t103151] module.js:471
2017-02-10 09:35:07 default[20170210t103151] throw err;
2017-02-10 09:35:07 default[20170210t103151] ^
2017-02-10 09:35:07 default[20170210t103151]
2017-02-10 09:35:07 default[20170210t103151] Error: Cannot find module 'firebase-admin'
2017-02-10 09:35:07 default[20170210t103151] at Function.Module._resolveFilename (module.js:469:15)
2017-02-10 09:35:07 default[20170210t103151] at Function.Module._load (module.js:417:25)
2017-02-10 09:35:07 default[20170210t103151] at Module.require (module.js:497:17)
2017-02-10 09:35:07 default[20170210t103151] at require (internal/module.js:20:19)
2017-02-10 09:35:07 default[20170210t103151] at Object.<anonymous> (/app/server.js:1:78)
2017-02-10 09:35:07 default[20170210t103151] at Module._compile (module.js:570:32)
2017-02-10 09:35:07 default[20170210t103151] at Object.Module._extensions..js (module.js:579:10)
2017-02-10 09:35:07 default[20170210t103151] at Module.load (module.js:487:32)
2017-02-10 09:35:07 default[20170210t103151] at tryModuleLoad (module.js:446:12)
2017-02-10 09:35:07 default[20170210t103151] at Function.Module._load (module.js:438:3)
2017-02-10 09:43:58 default[20170210t104151] module.js:471
2017-02-10 09:43:58 default[20170210t104151] throw err;
2017-02-10 09:43:58 default[20170210t104151] ^
2017-02-10 09:43:58 default[20170210t104151]
2017-02-10 09:43:58 default[20170210t104151] Error: Cannot find module 'serviceAccountKey.json'
2017-02-10 09:43:58 default[20170210t104151] at Function.Module._resolveFilename (module.js:469:15)
2017-02-10 09:43:58 default[20170210t104151] at Function.Module._load (module.js:417:25)
2017-02-10 09:43:58 default[20170210t104151] at Module.require (module.js:497:17)
2017-02-10 09:43:58 default[20170210t104151] at require (internal/module.js:20:19)
2017-02-10 09:43:58 default[20170210t104151] at Object.<anonymous> (/app/server.js:7:22)
2017-02-10 09:43:58 default[20170210t104151] at Module._compile (module.js:570:32)
2017-02-10 09:43:58 default[20170210t104151] at Object.Module._extensions..js (module.js:579:10)
2017-02-10 09:43:58 default[20170210t104151] at Module.load (module.js:487:32)
2017-02-10 09:43:58 default[20170210t104151] at tryModuleLoad (module.js:446:12)
2017-02-10 09:43:58 default[20170210t104151] at Function.Module._load (module.js:438:3)
2017-02-10 09:44:10 default[20170210t104151] module.js:471
2017-02-10 09:44:10 default[20170210t104151] throw err;
2017-02-10 09:44:10 default[20170210t104151] ^
2017-02-10 09:44:10 default[20170210t104151]
2017-02-10 09:44:10 default[20170210t104151] Error: Cannot find module 'serviceAccountKey.json'
2017-02-10 09:44:10 default[20170210t104151] at Function.Module._resolveFilename (module.js:469:15)
2017-02-10 09:44:10 default[20170210t104151] at Function.Module._load (module.js:417:25)
2017-02-10 09:44:10 default[20170210t104151] at Module.require (module.js:497:17)
2017-02-10 09:44:10 default[20170210t104151] at require (internal/module.js:20:19)
2017-02-10 09:44:10 default[20170210t104151] at Object.<anonymous> (/app/server.js:7:22)
2017-02-10 09:44:10 default[20170210t104151] at Module._compile (module.js:570:32)
2017-02-10 09:44:10 default[20170210t104151] at Object.Module._extensions..js (module.js:579:10)
2017-02-10 09:44:10 default[20170210t104151] at Module.load (module.js:487:32)
2017-02-10 09:44:10 default[20170210t104151] at tryModuleLoad (module.js:446:12)
2017-02-10 09:44:10 default[20170210t104151] at Function.Module._load (module.js:438:3)
2017-02-10 16:20:02 default[20170210t124920] Error: Credential implementation provided to initializeApp() via the "credential" property failed to fetch a valid Google OAuth2 access token with the following error: "connect ETIMEDOUT 74.125.202.84:443".
2017-02-10 16:20:02 default[20170210t124920] at /app/node_modules/firebase-admin/lib/firebase-app.js:74:23
2017-02-10 16:20:02 default[20170210t124920] at process._tickCallback (internal/process/next_tick.js:103:7)
How do I fix this ??
These issues seem to be caused by a misunderstanding of how require() paths work. You cannot use an absolute path because something like require("/Users/username/somepath") obviously won't exist on the remote machine when the app is deployed and the import will fail. Using require("serviceAccountKey.json") is going to look in node_modules/serviceAccountKey.json relative to the app directory.
If you want to load serviceAccountKey.json from the app's root directory, you would use require("./serviceAccountKey.json"). If it were in a subdirectory called foo under the root you'd use require("./foo/serviceAccountKey.json"). This also applies to loading modules in general such as firebase-admin.
The NodeJS Modules documentation explains the require() mechanism in greater detail.
I could make a workaround on this proceeding like this: (passing the serviceAccountkeyFile.json parameters inside app.js code):
let defaultAppConfig = {
credential: admin.credential.cert({
type: "service_account",
project_id: "txxxxxxxxxx",
private_key_id: "xxxxxxxxxxxxxxxxxxxxxxxxxx",
private_key: "-----BEGIN PRIVATE KEY----------END PRIVATE KEY-----\n",
client_email: "firebaxxxxxxx@xxxxxxx.gserviceaccount.com",
client_id: "11111111111111111",
auth_uri: "https://accounts.google.com/o/oauth2/auth",
token_uri: "https://accounts.google.com/o/oauth2/token",
auth_provider_x509_cert_url: "https://www.googleapis.com/oauth2/v1/certs",
client_x509_cert_url: "https://www.googleapis.com/robot/v1/metadata/x509/jjjjjj.gserviceaccount.com"
}),
databaseURL: 'https://projectxxx.firebaseio.com/'
}
defaultApp = admin.initializeApp(defaultAppConfig);
I had a similar problem running gcloud app deploy
Error: Cannot find module 'webpack-dev-server'
at Function.Module._resolveFilename (module.js:469:15)
I solved the issue moving the given dependency (wepack-dev-server) from devDependencies to dependencies in package.json.
In case somebody else has the same problem I suggest to have look at your dependencies in package.json. dependencies are required to run, devDependencies only to develop, e.g.: unit tests, Coffeescript to Javascript transpilation, minification,
来源：https://stackoverflow.com/questions/42176453/google-app-engine-node-cannot-find-module-firebase-admin