Although docker compose watch is a really helpful tool, there are several problems that users run into when using it.
This post is focused on issues commonly faced by Linux users.
Let’s See what these Common Technical Issues are and how to resolve them.
Changes not Detected
The main problem in docker compose is that some times it does not detect the changes.
below are some reasons and solutions to fix this problem .
Using docker compose up –watch with detach mod:
While we can run docker compose up with -d flag for detach mod but when using docker compose up with --watch flag we can’t use -d flag.
If we use -d flag it won’t create any error but the watch is not enabled and hence the changes are not detected.
The reason it happens is because the docker compose watch uses command-line tools to detect changes.Those commands can’t be run in background.
Solution:
we can use && operator to run the command in background in terminal which is a terminal feature docker compose up --watch &&
using mounted folders for watch
If you are using mounted folders in your path in docker-compose.yml file then the watch will not be enabled because the folder is already sync in docker container and there is no need for the watch to enable for that folder.
Solution:
You have two choices to solve this problem.
- remove the mounted folder and use it in watch path only.
- remove the path because the watch is not needed on mounted folders.
Permission Issues
Folder used for detecting changes can have permission issues, especially if the user who run the docker compose command does not have access to that folder.
Permission issue restricts docker from accessing the folder because of which the changes are not detected and the files are not sync.
Solution:
Make sure the user have proper access on the folder to detect changes.
You can change the permission of a folder using chmod command.
Check here about AlmaLinux Web Console | Effortless Management with Cockpit Interface
Path Configuration:
- Incorrect Path Mappings: Incorrectly specifying paths in
docker-compose.ymlcan lead to files not being found or changes not being reflected. Ensuring that paths are correctly mapped is crucial.- Solution: The paths in
docker-compose.ymlis relative which means you have to put relative path to watch for changes.
- Solution: The paths in
- Case Sensitivity: File paths are case-sensitive in Linux containers, which can lead to issues if your host OS is not case-sensitive (e.g., Windows or macOS).
- Solution: be sure to write the exact path and watch for case-sensitivity
