Access running docker container filesystem

Question

I am developing a WordPress theme and set up the development environment using docker. My docker-compose.yml volume property looks like this;

volumes:                                                                                                                
  - ~/WordPress/wp-content:/var/www/html/wp-content

it mounts just the wp-content directory to the local machine. I now have to edit wp-config file which is in /var/www/html/ the docker image container. Can anyone here show me how to access and edit the wp-config file in the running docker container?

No, you need to change the configuration and recreate the container, at least. — Tatsuyuki Ishi
– Tatsuyuki Ishi, Commented Mar 12, 2017 at 10:22
That"s a relief. Any clue on accessing and editing the file? — forethought
– forethought, Commented Mar 12, 2017 at 10:25
@mike I do not want add another volume because I just need to edit the file once or twice in the whole theme development process. — forethought
– forethought, Commented Mar 12, 2017 at 10:35
This is against best practices. Your app will stop working when you recreate your container — Mike Doe
– Mike Doe, Commented Mar 12, 2017 at 16:47

3 revs · Accepted Answer · 2020-05-08 13:41:05Z

1

You can run a shell terminal in the running container.

Get the container ID
```
 docker container ls
```

Run the terminal

 docker container exec -it container_ID "/bin/bash"

But, whatever change you do, it will not be persisted. You have to map this volume also.

 volumes:
      - ~/WordPress/wp-content:/var/www/html

edited May 8, 2020 at 13:41

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3 revs
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2 Comments

forethought Over a year ago

How to make it persisted so that when I start the container tomorrow the changes still be in effect.

Mike Doe Over a year ago

You need to add the volume like I said previously

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