5. Read log files

The logging behaviour is determined by the value of DOCKER_LOGS inside your .env file. By default logs are mounted to the host operating system for convenient access.

Table of Contents

5.1. Mounted logs

By default log files for PHP, the webserver and the MySQL server are mounted to the host system into your Devilbox git directory under ./log/. All logs are separated by service version in the following format: ./log/<service>-<version>/

The log directory structure would look something like this:

host> cd path/to/devilbox
host> tree log

├── nginx-stable/
│   ├── nginx-stable/
│   ├── defaultlocalhost-access.log
│   ├── defaultlocalhost-error.log
│   ├── <project-name>-access.log    # Each project has its own access log
│   ├── <project-name>-error.log     # Each project has its own error log
├── mariadb-10.1/
│   ├── error.log
│   ├── query.log
│   ├── slow.log
├── php-fpm-7.1/
│   ├── php-fpm.access
│   ├── php-fpm.error

Use your favorite tools to view log files such as tail, less, more, cat or others.


Currently logs are only mounted for PHP, HTTPD and MYSQL container. All other services will log to Docker logs.

5.2. Docker logs

You can also change the behaviour where logs are streamed by setting DOCKER_LOGS to 1 inside your .env file. When doing logs are sent to Docker logs.

When using this approach, you need to use the docker-compose logs command to view your log files from within the Devilbox git directory.

host> cd path/to/devilbox
host> docker-compose logs

When you want to continuously watch the log output (such as tail -f), you need to append -f to the command.

host> cd path/to/devilbox
host> docker-compose logs -f

When you only want to have logs displayed for a single service, you can also append the service name (works with or without -f as well):

host> cd path/to/devilbox
host> docker-compose logs php -f


This currently does not work for the MySQL container, which will always log to file.

5.3. Checklist

  1. You know how to switch between file and Docker logs
  2. You know where log files are mounted
  3. You know how to access Docker logs