volumes.md

Volumes

you have two options

1. create a volume

docker volume create mydata

i gets created as a directory under /var/lib/docker/volumes/

inspect: 'docker volume inspect mydata`

mount

docker run -d \
  --name devtest \
  -v mydata:/app \
  nginx:latest

readonly

docker run -d \
  --name=nginxtest \
  -v mydata:/usr/share/nginx/html:ro \
  nginx:latest

2. mount an existing folder or file (bind mounts)

docker run -d \
  --restart always --name postgresdb -p 5432:5432 -e POSTGRES_PASSWORD=postgres_pw \
  -v /mnt/data/volumes/postgresql/data:/var/lib/postgresql/data \
  postgres:12

it mounts the directory /mnt/data/volumes/postgresql/data to the postrges container

docker run -d \
  -it \
  --name devtest \
  -v "$(pwd)"/target:/app:ro \
  nginx:latest

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