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Python Tutorial
The Python program is deployed on the server (same as the virtual machine, taking CentOS7 as an example)
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1. Configure Python virtual environment
## Create a virtual environment (built-in server)
python -m venv environment name
## Switch virtual environment
source virtual environment directory/bin/activate
## Install corresponding library
pip install xxx
It is best to install python3.x first for the above operations, because the server comes with python2.x version
2. Upload code
It is best to upload it to the directory of the virtual environment. General remote connections can be dragged and dropped to upload. I will not explain it in detail here.
3. Write xxx.service service
## Switch directory
cd /etc/systemd/system
## Write service
sudo vim xxx.service
## Content
## Description: Description of this service, write whatever you want
## After: Specifies that the service starts after the network service starts, ensuring that the network is available
## WorkingDirectory: The directory where the .py file is located
## ExecStart: Which editor to run the file with
## Restart: If the service terminates unexpectedly, it will always restart automatically
## WantedBy: Specifies that the service is enabled in the system multi-user mode
## If you need to modify it, just modify WorkingDirectory, ExecStart, and Description
[Unit]
Description=Emotion Analysis Service
After=network.target
[Service]
User=root
WorkingDirectory=/opt/emotion/project
ExecStart=/opt/emotion/bin/python /opt/emotion/project/app.py
Restart=always
[Install]
WantedBy=multi-user.target
## Run (run as root, add sudo)
sudo systemctl start xxx.service/xxx (two ways, you can use .service or not)
## Set to start running
sudo systemctl enable xxx.service/xxx
4. View
## View status 2 sudo systemctl status xxx.service/xxx 3 4 ## View log 5 sudo journalctl -u "xxx" -f
This is the gradio interface I deployed on the virtual machine. It shows active, indicating successful operation.
5. Multiple Services
In case I need to deploy many services on the virtual machine, my virtual machine has three gradio interfaces deployed, so I need to write three services. This is easy to do, just copy and paste, but starting services is very cumbersome, which highlights the role of shell scripts
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