devops Cheat Sheet

Dash

Install virtual environment
python3 -m venv name_folder	Create an environment for project inside folder. If folder does not exist, create one

Flash + plotly + react = Dash

GIT

git clone link-to-git-folder	clone code from git folder
mkdir	make directory. This command is useful for make new directory in termux.
git init	initialized empty git repository
touch name_file	create file

Manager code

NGINX

sudo apt install nginx	install nginx
sudo nano /etc/nginx/sites-enabled/dash_app	create dash_app to use with nginx
172.105.72.121	IP server
80	port for incoming request
http://127.0.0.1:8000	port of Gunicorn

server {
listen 80;
server_name 172.105.72.121;
location / {
proxy_pass http://127.0.0.1:8000;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_
forwarded_for;
}
}

SSH

ls	list out
rm	remove
sudo	super user do
cat	concatenate

WSGI-gunicorn

gunicorn name_python_app:server_name_in_python_app	run app by gunicorn
gunicorn --workers=9 --threads=4 name_python_app:app	create 9 workers and 4 threads for each worker

Bọc app python để mong muốn có thể nhân đôi nhiều phiên bản của app python, để có thể thực hiện nhiều yêu cầu cùng lúc

wrap python app to multi versions to implement many requests

Flask

@app.route("/change_img_color", methods=["POST"])

receive apihttp://127.0.0.1:8000/change_img_color

docker

docker file
docker image
docker build -t myimage .	build and tag an image from a Dockerfile
docker images	show a list of all images

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Dash