Hello World with nginx + uwsgi + python on EC2

In addition to returning Hello World! Finally html, I also made the code to confirm that something can be written to S3.

environment

EC2(Amazon Linux)

Preparation

EC2 instance

Since the sample code is written to S3, assign a put_object-enabled role to S3.

Installation

nginx $ sudo yum install nginx

uwsgi $ sudo pip install uwsgi

you need a C compiler to build uWSGI If so, please install the C compiler. In Installing uWSGI, it was included below. $ sudo yum groupinstall "development tools"

Setting

Reference: Quickstart for Python / WSGI applications

nginx Edit /etc/nginx/nginx.conf

--Edit inside server {location / { --Add location = /favicon.ico {in server {

nginx.conf

server {

  location / {
      include uwsgi_params;
      uwsgi_pass 127.0.0.1:3031;
  }

  location = /favicon.ico{
    empty_gif;
  }

When I first tested it from the browser, it connected to uwsgi even for the favorite request, and it was double-executed. So I also specified location = /favicon.ico.

uwsgi

Prepare a directory for uwsgi appropriately $ mkdir /var/www/uwsgi

Proceed with the image that you put in this directory as follows.

uwsgi/
   index.py  #Execution source
   uwsgi.ini　　#setting file
   uwsgi.log #Log output destination
   uwsgi.pid　　#Process id output destination

uwsgi.ini Write options to pass at runtime. Since it became long, I wrote it in the ini file.

uwsgi.ini

[uwsgi]
master = True
socket = 127.0.0.1:3031
wsgi-file = index.py
stats = 127.0.0.1:9191
logto = uwsgi.log
pidfile = uwsgi.pid

Reference: uWSGI Options

code

In addition to returning Hello World! Finally html, I also made the code to confirm that something can be written to S3. I will use boto3 to export to s3, so I will put it in. $ sudo pip install boto3

The function called application is the entry point from uwsgi. Change the Bucket Name to your own bucket name.

index.py

# coding:utf-8

import boto3
import logging
import datetime
import uuid

handler = logging.StreamHandler()
handler.setFormatter(logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s'))
logger = logging.getLogger()
logger.addHandler(handler)
logger.setLevel(logging.INFO)

def main():

    # S3
    s3 = boto3.resource('s3')
    now_s = datetime.datetime.now().strftime('%Y.%m.%d-%H:%M:%S')
    key = 'test-folder/{0}-{1}.txt'.format(now_s, uuid.uuid4())
    s3.meta.client.put_object(Bucket='BucketName', Key=key, Body='test dayo')

    # log
    logger.info('test-log-dayo')



def application(env, start_response):
    main()
    start_response('200 OK', [('Content-Type','text/html')])
    return "Hello World!"

Move

Start-up

start nginx

$ service nginx start

start uwsgi

$ cd /var/www/uwsgi
$ uwsgi --ini uwsgi.ini

Verification

Http request to EC2. OK if you can confirm the following.

--The response is 200, and the html ** Hello World! ** is returned. --A file with a name like "date + date and time + uid.txt" is created in the test-folder of the bucket specified by S3. --The log says test-log-dayo.

Stop (uwsgi)

At the time of front execution

I stopped with ** control + c **.

When running in the background

I stopped at either of the following.

$ kill -9 `cat uwsgi.pid`

$ killall -9 uwsgi 

Other

Get query parameters for Get

Could not get from cgi.FieldStorage. Obtained from QUERY_STRING in the application argument env.

Get Post request body

Could not get from cgi.FieldStorage. I got it when I read wsgi.input of the argument env of application.

Reference: Accessing POST Data from WSGI

end

I'm going to touch it for a moment, but I wrote it because it took time. Linux is a man who has recently begun to touch. If something is wrong, please let me know. end.