javascript - 使用Python脚本的Heroku Node.js

Question

我在Heroku上运行了一个Node.js应用程序。我在其中添加了一些代码，以使其使用node-cmd运行Python（python3）脚本。所有这些都在本地工作。当我尝试将其部署到Heroku时，构建成功，但是应用程序未加载-应用程序错误提示：“应用程序中发生错误，无法为您的页面提供服务。如果您是应用程序所有者，请检查您的日志有关详细信息。”

我已经添加了Heroku和Node.js buildpacks：

heroku buildpacks:add heroku/python
heroku buildpacks:add heroku/nodejs

我的Procfile看起来像这样：

web: pip3 install -r requirements.txt & npm start

这是控制台输出：

Counting objects: 8, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (8/8), done.
Writing objects: 100% (8/8), 925 bytes | 0 bytes/s, done.
Total 8 (delta 4), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Node.js app detected
remote: 
remote: -----> Creating runtime environment
remote:        
remote:        NPM_CONFIG_LOGLEVEL=error
remote:        NPM_CONFIG_PRODUCTION=true
remote:        NODE_VERBOSE=false
remote:        NODE_ENV=production
remote:        NODE_MODULES_CACHE=true
remote: 
remote: -----> Installing binaries
remote:        engines.node (package.json):  unspecified
remote:        engines.npm (package.json):   unspecified (use default)
remote:        engines.yarn (package.json):  unspecified (use default)
remote:        
remote:        Resolving node version 6.x...
remote:        Downloading and installing node 6.11.1...
remote:        Using default npm version: 3.10.10
remote:        Resolving yarn version (latest)...
remote:        Downloading and installing yarn (0.28.1)...
remote:        Installed yarn 0.28.1
remote: 
remote: -----> Restoring cache
remote:        Loading 2 from cacheDirectories (default):
remote:        - node_modules
remote:        - bower_components (not cached - skipping)
remote: 
remote: -----> Building dependencies
remote:        Installing node modules (yarn.lock)
remote:        yarn install v0.28.1
remote:        [1/4] Resolving packages...
remote:        [2/4] Fetching packages...
remote:        [3/4] Linking dependencies...
remote:        [4/4] Building fresh packages...
remote:        success Saved lockfile.
remote:        Done in 4.95s.
remote: 
remote: -----> Caching build
remote:        Clearing previous node cache
remote:        Saving 2 cacheDirectories (default):
remote:        - node_modules
remote:        - bower_components (nothing to cache)
remote: 
remote: -----> Build succeeded!
remote: -----> Python app detected
remote: -----> Installing python-3.6.2
remote: -----> Installing pip
remote: -----> Installing requirements with pip

[安装程序包]

remote:        Successfully installed Keras-2.0.6 Markdown-2.6.8 PyMySQL-0.7.11 PyYAML-3.12 SQLAlchemy-1.1.12 Theano-0.9.0 Werkzeug-0.12.2 backports.weakref-1.0rc1 bleach-1.5.0 configparser-3.5.0 h5py-2.7.0 html5lib-0.9999999 mysqlclient-1.3.10 numpy-1.13.1 pandas-0.20.3 protobuf-3.3.0 python-dateutil-2.6.1 pytz-2017.2 scikit-learn-0.18.2 scipy-0.19.1 six-1.10.0 sklearn-0.0 tensorflow-1.2.1
remote: 
remote: -----> Discovering process types
remote:        Procfile declares types -> web
remote: 
remote: -----> Compressing...
remote:        Done: 235.4M
remote: -----> Launching...
remote:        Released v17
remote:        https://fathomless-temple-41546.herokuapp.com/ deployed to Herok
remote: 
remote: Verifying deploy... done.
To https://git.heroku.com/fathomless-temple-41546.git
   3ed0799..e16fb12  master -> master

有什么我想念的吗？

Answer 1

heroku buildpacks:add heroku/python
heroku buildpacks:add heroku/nodejs
heroku ps:scale web=1

我得到一个 Scaling dynos... !
▸ Couldn't find that process type (web).
运行 scale web=1时发生错误，我通过使用 web: bundle exec node app -p $PORT临时添加Procfile并在从应用程序中删除Procfile之前再次运行它来解决此问题。