Docker bind mount?

Docker bind mount?

When you use a bind mount, a file or directory on the host machine is mounted into a container.

Bind mounts may be stored anywhere on the host system. They may even be important system files or directories. Non-Docker processes on the Docker host or a Docker container can modify them at any time.

Sharing with one or more containers are allowed in bind mount.

Note: To attach multiple (bind mount) to container use -v/--mount flag more than once

Commands:

[root@localhost ~]# mkdir target
[root@localhost ~]# cd target/
[root@localhost target]# touch qader1

docker run -d \
-it \
--name devtest \
--mount type=bind,source="$(pwd)"/target,target=/app \
nginx:latest

[root@localhost ~]# docker run -d -it --name devtest --mount type=bind,source="$(pwd)"/target,target=/app nginx:latest

[root@localhost ~]# docker exec -it devtest bash
root@7e7fc162399c:/# ls
app bin boot dev docker-entrypoint.d docker-entrypoint.sh etc home lib lib32 lib64 libx32 media mnt opt proc root run sbin srv sys tmp usr var
root@7e7fc162399c:/# cd app/
root@7e7fc162399c:/app# ls
qader1
root@7e7fc162399c:/# cd app/
root@7e7fc162399c:/app# touch qader3
root@7e7fc162399c:/app# exit
exit
[root@localhost ~]# ls -ltrh target
total 0
-rw-r--r--. 1 root root 0 Aug 5 15:37 qader1
-rw-r--r--. 1 root root 0 Aug 5 15:41 qader2
-rw-r--r--. 1 root root 0 Aug 5 15:42 qader3


docker run -d \
-it \
--name abc \
-v "$(pwd)"/target:/app \
nginx:latest

[root@localhost ~]# docker run -d -it --name abc -v "$(pwd)"/target:/app nginx:latest
7e9d2a26b3b14a106f1855e0795808539ef28fa5c34d206ce1e1b64916c073d6

[root@localhost ~]# docker exec -it abc bash
root@7e9d2a26b3b1:/# cd app/
root@7e9d2a26b3b1:/app# ls
qader1
root@7e9d2a26b3b1:/app# touch qader2
rot@7e9d2a26b3b1:/app# exit
exit
[root@localhost ~]# ls -ltrh target
total 0
-rw-r--r--. 1 root root 0 Aug 5 15:37 qader1
-rw-r--r--. 1 root root 0 Aug 5 15:41 qader2