MOUNT.CEPH(8) | Ceph | MOUNT.CEPH(8) |
mount.ceph - mount a ceph file system
mount.ceph [monaddr1,monaddr2,...]:/[subdir] dir [ -o options ]
mount.ceph is a helper for mounting the Ceph file system on a Linux host. It serves to resolve monitor hostname(s) into IP addresses and read authentication keys from disk; the Linux kernel client component does most of the real work. In fact, it is possible to mount a non-authenticated Ceph file system without mount.ceph by specifying monitor address(es) by IP:
mount -t ceph 1.2.3.4:/ mountpoint
Each monitor address monaddr takes the form host[:port]. If the port is not specified, the Ceph default of 6789 is assumed.
Multiple monitor addresses can be separated by commas. Only one responsible monitor is needed to successfully mount; the client will learn about all monitors from any responsive monitor. However, it is a good idea to specify more than one in case one happens to be down at the time of mount.
If the host portion of the device is left blank, then mount.ceph will attempt to determine monitor addresses using local configuration files and/or DNS SRV records.
A subdirectory subdir may be specified if a subset of the file system is to be mounted.
Mount helper application conventions dictate that the first two options are device to be mounted and destination path. Options must be passed only after these fixed arguments.
If the secret and secretfile options are not specified on the command-line then the mount helper will spawn a child process that will use the standard ceph library routines to find a keyring and fetch the secret from it.
Mount the full file system:
mount.ceph monhost:/ /mnt/foo
If there are multiple monitors:
mount.ceph monhost1,monhost2,monhost3:/ /mnt/foo
If ceph-mon(8) is running on a non-standard port:
mount.ceph monhost1:7000,monhost2:7000,monhost3:7000:/ /mnt/foo
To automatically determine the monitor addresses from local configuration:
mount.ceph :/ /mnt/foo
To mount only part of the namespace:
mount.ceph monhost1:/some/small/thing /mnt/thing
Assuming mount.ceph(8) is installed properly, it should be automatically invoked by mount(8) like so:
mount -t ceph monhost:/ /mnt/foo
mount.ceph is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer to the Ceph documentation at http://ceph.com/docs for more information.
2010-2021, Inktank Storage, Inc. and contributors. Licensed under Creative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)
May 27, 2021 | dev |