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How to create a read only bind Mount?
The alternative (classic) way to create a read-only bind mount is to use the remount operation, for example: Note that a read-only bind will create a read-only mountpoint (VFS entry), but the original filesystem superblock will still be writable, meaning that the olddir will be writable, but the newdir will be read-only.
Where does the bind Mount call attach to?
The bind mount call attaches only (part of) a single filesystem, not possible submounts. The entire file hierarchy including submounts is attached a second place by using:
What is the difference between binding mounts and volumes?
Because the -v and –volume flags have been a part of Docker for a long time, their behavior cannot be changed. This means that there is one behavior that is different between -v and –mount. If you use -v or –volume to bind-mount a file or directory that does not yet exist on the Docker host, -v creates the endpoint for you.
What happens when you use bind Mount in Docker?
If you use –mount to bind-mount a file or directory that does not yet exist on the Docker host, Docker does not automatically create it for you, but generates an error. Consider a case where you have a directory source and that when you build the source code, the artifacts are saved into another directory, source/target/ .
When to use bind flag in Remount command?
If you have a system without the /etc/mtab file or if you explicitly define source and target for the remount command (then mount (8) does not read /etc/mtab), then you have to use bind flag (or option) for the remount command too. For example: . mount –bind olddir newdir mount -o remount,ro,bind olddir newdir
Is there a way to bind Mount in systemd?
There has been a feature request for systemd to support bind mount options directly, but it was closed with the response that the behavior should rather be fixed in the kernel or in the mount command. And while that may be a long-term solution for this issue, it does not help in the short term.
Do you need to specify _ netdev for bind mounts?
For bind mounts on network filesystems, one typically would specify the _netdev option for it to work properly (regardless of the init system), so depending on whether that option exists or not, the unit remounting the filesystem needs to have a different Before= dependency. Therefore]