Re:Docker Compose syntax: Volume or Bind mount?
by maximization on Thursday April 02, 2020 @02:38PM
(#22762144)
Compose allows you to configure volumes using a short syntax format: `[SOURCE:]TARGET[:MODE]`
In practice, this leads to different string variations. Every time I read a docker-compose.yml file, I had to refer to the docs or run a quick test to figure out if a volume or a bind mount is used. I wrote a short guide so I wouldn't have to look this stuff up anymore and be able to memorise it by heart.
The gist of it is:
1. No source -> anonymous volume
2. Non-path source -> named volume (defined in a top-level `volumes` key)
3. Relative or absolute path source -> bind mount
Hope this helps some of you out there that trip over this syntax like me.
In practice, this leads to different string variations. Every time I read a docker-compose.yml file, I had to refer to the docs or run a quick test to figure out if a volume or a bind mount is used. I wrote a short guide so I wouldn't have to look this stuff up anymore and be able to memorise it by heart.
The gist of it is:
1. No source -> anonymous volume
2. Non-path source -> named volume (defined in a top-level `volumes` key)
3. Relative or absolute path source -> bind mount
Hope this helps some of you out there that trip over this syntax like me.
Stay home and be safe!