Expected behavior
When creating / removing / updating a file / folder in a mounted folder, inotify events are triggered inside the container
Actual behavior
Under certain conditions, no inotify events are triggered.
Information
I encountered this issue while working on a sync project to increase the performance of docker volumes.
Basically, it launches an unison server in a container and performs syncs in realtime by watching two folders in the container: a normal one and one mounted to the host OSXFS. Syncing from the container to the host, always work. However, it looks like syncing from the host to the container stop / doesn’t work under certain conditions…
I tried to reproduce these conditions by creating a simple example that you can grab at GitHub - mickaelperrin/docker-magic-sync at feature/1.
Docker for Mac: version: mac-v1.12.0-beta20
OS X: version 10.11.5 (build: 15F34)
logs: /tmp/20160725-190835.tar.gz
[OK] docker-cli
[OK] app
[OK] moby-syslog
[OK] virtualization
[OK] menubar
[OK] system
[OK] osxfs
[OK] db
[OK] slirp
[OK] moby-console
[OK] logs
[OK] vmnetd
[OK] env
[OK] moby
[OK] driver.amd64-linux
Steps to reproduce the behavior
#1. get the example from Github
git clone -b feature/1 https://github.com/mickaelperrin/docker-magic-sync
#2. start the containers
cd docker-magic-sync/example
./compose.sh up -d --build
# 3. launch inotify in the container
docker exec -it example-magic_sync_1 inotifywait -m /src/project.magic
# 4. open a new terminal and go to subfolder example
touch newfile
# 5. check that no notification is emitted by inotifywait
# 6. ensure the file is created
docker exec -it example_magic-sync_1 sh -c "test -f /src/project.magic/newfile && echo 'No events were emitted but file was created'"