How To Deploy Python App No Internet

Flask deploy into Apache on CentOS without Internet

Environment

CentOS Linux release 7.5.1804 (Core)
httpd 2.4.6 (Apache)
Python 3.5.1
mod_wsgi 4.6.4

Project Structure

log: sotre apache log such as error log and access log
static: sotre static file such as image, css, js
templates: store html file
web.py

                      from            flask            import            Flask  app = Flask(__name__)            @app.route("/")                          def              hello              ():            return            "Hello world!"

app.wsgi

          from web import app as application

Deployment Process

Install Apache and Additional Modules for Apache

          $ yum install httpd $ yum install httpd-devel

Install Required Tools

python3 requires

          $ yum -y groupinstall development

pip requires

          $ yum install openssl-devel

Install Python 3.5.1

          $ wget -q 'https://www.python.org/ftp/python/3.5.1/Python-3.5.1.tgz' $ tar -xzf 'Python-3.5.1.tgz' $ cd Python-3.5.1 $ CXX=g++ ./configure --enable-shared $ make $ make altinstall $ cd .. $ rm Python-3.5.1.tgz $ rm -rf Python-3.5.1 $ ln -fs /usr/local/bin/python3.5 /usr/bin/python3.5 $ echo "/usr/local/lib/python3.5" > /etc/ld.so.conf.d/python35.conf $ echo "/usr/local/lib" >> /etc/ld.so.conf.d/python35.conf $ ldconfig

Install mod_wsgi 4.6.4

          $ wget -q "https://github.com/GrahamDumpleton/mod_wsgi/archive/4.6.4.tar.gz" $ tar -xzf 'mod_wsgi-4.6.4.tar.gz' $ cd mod_wsgi-4.6.4 $ ./configure --with-python=/usr/local/bin/python3.5 $ make $ make install

After installing, the wsgi_module will be installed into /usr/lib64/httpd/modules/mod_wsgi.so

Create Python Virtual Environment

Switch to the path where you want to create a virtual environment.

          $ cd your_venv_path

Create a virtual environment

          $ python3.5 -m venv venv_name

Activate the virtual environment

          $ source venv_name/bin/activate

After activating the environment

          (venv_name) $

Prepare requirements.txt and Download all the Packages from your Developing Virtual Environment

get requirements.txt

          (devel_venv) $ pip freeze > requirements.txt

download all the packages into your path

          (devel_venv) $ pip install --download=/your/path/packages -r requirements.txt

Take requirements.txt and all the Downloaded Packages into your Deployment Server

install packages into venv of deployment server

          (venv_name) $ pip install --no-index --find-links=/your/path/packages -r requirements.txt

Set Apache Configure

create a 02-wsgi.conf to load mod_wsgi into apache

          $ vim /etc/httpd/conf.modules.d/02-wsgi.conf

add following command line in 02-wsgi.conf

          LoadModule wsgi_module "/usr/lib64/httpd/modules/mod_wsgi.so"

create a app.conf to set your project execution environment

          $ vim /etc/httpd/conf.d/app.conf

add the following content in app.conf

          # define a variable which is your project path Define PROJECT_PATH /your_project_path/MyApp  Listen 80 <virtualhost *:80>     # wsgi settings     WSGIDaemonProcess myapp python-path=${PROJECT_PATH}:/root/venv/lib/python3.5/site-packages     WSGIProcessGroup myapp     WSGIScriptAlias / ${PROJECT_PATH}/app.wsgi      # map server side static directory to {ip or domain_name}/static     Alias /static  ${PROJECT_PATH}/static      # allow all requests to access this project file     <Directory ${PROJECT_PATH}/>         Require all granted     </Directory>      # set log saved path     ErrorLog ${PROJECT_PATH}/log/error.log     CustomLog ${PROJECT_PATH}/log/access.log combined </virtualhost>

Start Apache

          $ systemctl start httpd

If you encounter startup error, using following command to see startup log.

          $ systemctl -l status httpd.service

References

pip error while installing Python:'pip requires SSL/TLS'
How to compile mod_wsgi with Python3 under centos7?
How to use pip to download the zipped files for packages?
How to enable or disable repositories in CentOS?