So I'm trying to deploy on heroku my app that uses node.js and python. it works on my computer but when i try to run it on heroku i get an error:
from selenium import webdriver
ImportError: no module named selenium
I have added Chrome, chromedriver, and selenium as buildpacks and in my Procfile i even have:
worker: pip install selenium
worker: python scraper.py
I am current just trying to get my python to work as i have already confirmed my javascript works.
The best way i found after along search over the internet, is using PhantomJs() web driver from selenium
from selenium import webdriver
driver = webdriver.PhantomJS()
#your code here
driver.quit()
and then use this buildpackge https://github.com/stomita/heroku-buildpack-phantomjs
$ heroku create --stack cedar --buildpack https://github.com/stomita/heroku-buildpack-phantomjs.git
# or if your app is already created:
$ heroku buildpacks:add https://github.com/stomita/heroku-buildpack-phantomjs
$ git push heroku master
and it shall work for you :)
module dependencies don't go in the procfile, they go in the requirement.txt file on the root of your project.
When you deploy on Heroku, you should see the log of the modules that were installed.
Also, you probably don't want to use Chromedriver unless you're running Chrome Headless on Heroku, because Heroku cannot open a browser on the server: it has no graphic interface.
You might want to use something like PhantomJS or Chrome Headless to make this work.
Related
I am working with the Meteor application and I deployed the same over EC2 instance. It was working fine till a few days back.
But now the server process kill automatically without any error log or
console
I tried to get the error but unfortunately, as there are not any logs I am unable to find out why the server is crashing again and again.
I have a medium EC2 machine on which the application is running.
I am using nohup for running the application in the background.
Below is the command I used to start the server:-
nohup meteor --settings SETTINGS-PRODUCTION.JSON &
I am wondering to know about server crashes due to nohup or some other reason is there.
Please let me know how we can console uncaught exception in the meteor-like we do in express.
What should I use to auto restart the server if the process is killed
by any error or exception?
Any help would be much appreciated!
Thanks
Using nohup is quite a low-tech solution. Things like Phusion Passenger, PM2, or forever do a better job.
Also your docker container can be configured to automatically restart the process.
Even better is a tool called Meteor Up, which makes it really simple to deploy Meteor apps to EC2.
EASILY DEPLOY YOUR APP Meteor Up is a production quality Meteor app
deployment tool.
Install with one command:
$ npm install --global mup
http://meteor-up.com/
When following an article entitled, "Debugging React apps created with Create React App in WebStorm", the Debugger says it's connected to the JetBrains IDE Chrome Extension, but I can't get breakpoints to execute when using port 3000 and when I try to use the default debug port 63342 a 404 error is shown.
Here is a recording of my settings in Chrome and Webstorm 2016.2 IDE when trying to debug: http://recordit.co/MQ3LICuUIc
Steps Taken:
I've created a new JS debug configuration with the name 'ERS React Debug', the browser set to Chrome, and I've tried using the following URLs in the configuration:
http://localhost:3000/
http://localhost:3000/ers_react/public/index.html
http://localhost:63342/ers_react/public/index.html
(YT video I watched used the debug port, which is what is in my recording)
I also setup the mapping to webpack:///src as recommend in the article.
Default ReactJS app created with create-react-app is designed to be hosted on webpack server started with react-scripts start, that builds the application and starts the server. You won't be able to open this application on the simple built-in webserver (localhost:63342).
To be able to debug modern React app, you need upgrading Webstorm to the most recent version - debugging will work out of the box. Fot Webstorm 2016.2, you can try specifying URL mappings... For "react-scripts": "1.0.17", it should be http://localhost:3000/static/js/full/path to project, like http://localhost:3000/static/js/C:/WebstormProjects/untitled if the project path is C:/WebstormProjects/untitled should work:
Note that you would need to refresh the browser page to get breakpoints in code executed on pagfe loading hit
I have never setup things this way, I got it running locally but have no clue how I should have do it when I deploy it into an ec2 server
I have a node app running already in ec2 server but recently I have added spaCy into one of my api.
The basic logic is calling the api which runs node and part of the js script uses spawn to process the proc.py file and do some calculation with outputs.
I have tried the following below to setup on my server but of course it failed when calling the api
my original node app is in /var/www/myApp
I used sudo apt install virtualenv then inside my /var/www/myApp I ran the command virtualenv venv which creates the virtual environment...
I did a source venv/bin/activate to get into the virtual environment
Then I started running the commands to install spacy mentioned in the spacy documentation https://github.com/explosion/spaCy
used this command to install pip install -U spacy and python -m spacy download en
Then I ran python -m spacy validate to see if spacy is installed which I got
Installed models (spaCy v2.0.11)
/var/www/myApp/venv/local/lib/python2.7/site-packages/spacy
TYPE NAME MODEL VERSION
package en-core-web-sm en_core_web_sm 2.0.0 ✔
link en en_core_web_sm 2.0.0 ✔
which I believe this means the installation is a success.
But after this, I am not sure what I should do to continue.
I tried running my api but getting this as an error message "err": "Traceback (most recent call last):\n"
I would believe the spacy module is not being called that's why I am getting this error but I am not sure what I should do to get this working.
Would really appreciate for any help, thanks in advance for any advices.
EDIT:
my proc.py code is below
if __name__ == '__main__':
import sys
import json
import spacy
nlp = spacy.load('en')
text = sys.argv[1]
doc = nlp(text)
all_noun_tokens = [ token.lemma_ for token in doc
if (token.pos_ == 'PROPN'
or token.pos_ == 'NOUN'
or token.tag_ == 'NN'
or token.tag_ == 'NNP') ]
print(json.dumps(all_noun_tokens))
P.S. I am wondering if there's any config that I need to do in order for my app to find where the virtuanenv is so it can detect the spacy module?
I've got a simple Meteor app running on a Nitrous box. I'd like to be able to use node-inspector for server-side debugging (as described here), but I'm unable to get to the console.
My Meteor app is running locally on the box at http://0.0.0.0:3000/, and I can view it in Chrome by following the guide here. When I then run node-inspector, I get this message:
Node Inspector v0.8.3
Visit http://127.0.0.1:8080/debug?port=5858 to start debugging.
How can I get to this address? I've tried:
Navigating to https://example-name.example-region.nitrous.io:8080/debug?port=5858
Running: node-inspector --web-host 0.0.0.0
Running: node-inspector --web-host https://example-name.example-region.nitrous.io
Thoughts? Is there a way I can get to this console?
You should change the url on the box,
usually you just run the box running the meteor command
cd workspace
cd myAPP
meteor
and it works, but now you should run this commands.
cd workspace
cd myApp
ROOT_URL=http://machinename.abc1-2.nitrousbox.com meteor
Now run again node-inspector
you should get something like
Visit http://machinename.abc1-2.nitrousbox.com:8080/debug?port=5858 to start debugging.
Recently I have installed a nodejs app on my EC2 directory, listening to one of the port from EC2 instance. I also have a couple of executable python scripts on my EC2 ubuntu Linux server.
The way I run those executable python script is to use putty and connect to ubuntu via command line( for windows, Sure for Mac I use terminal). I am just wondering, is it possible to have the nodejs app does the same job, so I will have a UI based on the web app, which can talk to ubuntu and execute those scripts (python scripts such as "python run.py".
Please advice, thank you!
If I'm understanding correctly, the Python scripts are on the same server as the Node app, and you'd like to run them from Node.js
var execScript = require('child_process').execFile;
execScript('/path/to/python/script.py');
Should probably do the trick.
Can also add options or callbacks as needed, see the docs here: http://nodejs.org/api/child_process.html