Even if I often saw docker-compose misused...
"When you use the wrong abstraction" :O pic.twitter.com/8yppNG4BAQ
— François-G. Ribreau (@FGRibreau) February 23, 2017
... I do find it sometimes useful when I develop locally. But I can't bear the cmd+tab + ctrl+c + up + enter each time I want to reload my containers because some configuration file changed. I'm not the only one, an issue exists on docker-compose project since 2014 (Watch code and automatically rebuild when something changes).
So here is a one-liner that works and restart docker-compose each time a *.yml, *.toml or *.conf file change:
watchexec --restart --exts "yml,toml,conf" --watch . "docker-compose up"
I used watchexec (rust) but you could definitely use something else like nodemon (nodejs).
And if you wish to restart docker-compose each time files from a specific folder are updated (e.g. api/), --filter is what you are looking for:
watchexec --restart --filter "$(pwd)/api/*" --watch . "docker-compose up"
For extra sweetness — because who wants to remember this one-liner forever? — I put the function below in my ~/.zshrc
function docker-compose-watch() {
local args;
if [[ $1 == "help" ]] || [[ $1 = "--help" ]]; then
watchexec --help | grep -A 3 "OPTIONS:";
return;
else
args='--filter "*/docker-compose.yml"' && [[ $1 ]] && args=$@;
fi
eval watchexec --restart $args -w $(pwd) "docker-compose up"
}
alias docker-compose-reload=docker-compose-watch;Usage:
docker-compose-watch --help
OPTIONS:
-e, --exts Comma-separated list of file extensions to watch (js,css,html)
-f, --filter ... Ignore all modifications except those matching the pattern
-i, --ignore ... Ignore modifications to paths matching the pattern
docker-compose-watch -e '*.js' -i './api'
Starting api_worker_1
Starting api_postgrest_1
Attaching to api_worker_1, api_postgrest_1
[... updating a file ...]
Gracefully stopping... (press Ctrl+C again to force)
Stopping api_postgrest_1 ... done
Stopping api_worker_1 ... done
Starting api_worker_1
Starting api_postgrest_1
Note: I definitely prefer to restart docker-compose up after each file change (with soft shutdown) than have to first remember to run docker-compose up and then run watchexec ... "docker-compose restart" and finally ctrl+c + docker-compose down.