CEPHFS-SHELL(8) Ceph CEPHFS-SHELL(8)

cephfs-shell - Shell-like tool talking with CephFS

cephfs-shell [options] [command]
cephfs-shell [options] -- [command, command,...]

CephFS Shell provides shell-like commands that directly interact with the Ceph File System.

This tool can be used in interactive mode as well as in non-interactive mode. In former mode, cephfs-shell opens a shell session and after the given command is finished, it prints the prompt string and waits indefinitely. When the shell session is finished, cephfs-shell quits with the return value of last executed command. In non-interactive mode, cephfs-shell issues a command and exits right after the command's execution is complete with the command's return value.

Behaviour of CephFS Shell can be tweaked using cephfs-shell.conf. Refer to CephFS Shell Configuration File for details.

Path to batch file.

Path to cephfs-shell.conf

Name of filesystem to mount.

Path to transcript(s) in FILE for testing

NOTE:

Latest version of the cmd2 module is required for running cephfs-shell. If CephFS is installed through source, execute cephfs-shell in the build directory. It can also be executed as following using virtualenv:


[build]$ python3 -m venv venv && source venv/bin/activate && pip3 install cmd2 colorama
[build]$ source vstart_environment.sh && source venv/bin/activate && python3 ../src/tools/cephfs/shell/cephfs-shell


NOTE:

Apart from Ceph File System, CephFS Shell commands can also interact directly with the local file system. To achieve this, ! (an exclamation point) must precede the CephFS Shell command.

Usage :

!<cephfs_shell_command>


For example,

CephFS:~/>>> !ls # Lists the local file system directory contents.
CephFS:~/>>> ls  # Lists the Ceph File System directory contents.




Create the directory(ies), if they do not already exist.

Usage :

mkdir [-option] <directory>...


•
directory - name of the directory to be created.

Sets the access mode for the new directory.
Create parent directories as necessary. When this option is specified, no error is reported if a directory already exists.


Copy a file/directory to Ceph File System from Local File System.

Usage :

put [options] <source_path> <target_path>


•
  • if . copies all the file/directories in the local working directory.
  • if - Reads the input from stdin.


•
•
if . files/directories are copied to the remote working directory.



Overwrites the destination if it already exists.


Copy a file from Ceph File System to Local File System.

Usage :

get [options] <source_path> <target_path>


•
•
if . copies all the file/directories in the remote working directory.


•
  • if . files/directories are copied to the local working directory.
  • if - Writes output to stdout.



Overwrites the destination if it already exists.


List all the files and directories in the current working directory.

Usage :

ls [option] [directory]...


•
•
By default current working directory's files/directories are listed.



-l, --long
list with long format - show permissions
-r, --reverse
reverse sort
human readable
-a,-all
ignore entries starting with .
Sort by file_size


Concatenate files and print on the standard output

Usage :

cat <file>....


•
file - name of the file

Add a hard link to an existing file or create a symbolic link to an existing file or directory.

Usage:

ln [options] <target> [link_name]


  • target - file/directory to which a link is to be created
  • link_name - link to target with the name link_name

-s, --symbolic
Create symbolic link
Print name of each linked file
Force create link/symbolic link


Change current working directory.

Usage :

cd [directory]


•
•
If '.' moves to the parent directory of the current directory.



Get current working directory.

Usage :

cwd


Close the shell.

Change the permissions of file/directory.

Usage :

chmod <mode> <file/directory>


Moves files/Directory from source to destination.

Usage :

mv <source_path> <destination_path>


Delete a directory(ies).

Usage :

rmdir <directory_name>.....


Remove a file(es).

Usage :

rm <file_name/pattern>...


Create and Write a file.

Usage :

write <file_name> <Enter Data> Ctrl+D Exit.


Lists all files and directories in the specified directory.Current local directory files and directories are listed if no path is mentioned

Usage:

lls <path>.....


Moves into the given local directory.

Usage :

lcd <path>


Prints the absolute path of the current local directory.

Usage :

lpwd


Set and get the file mode creation mask

Usage :

umask [mode]


Define or display aliases

Usage:

alias [name] | [<name> <value>]


  • name - name of the alias being looked up, added, or replaced
  • value - what the alias will be resolved to (if adding or replacing) this can contain spaces and does not need to be quoted

Runs a python script file inside the console

Usage:

run_pyscript <script_path> [script_arguments]


•
Console commands can be executed inside this script with cmd ("your command") However, you cannot run nested "py" or "pyscript" commands from within this script. Paths or arguments that contain spaces must be enclosed in quotes

NOTE:

This command is available as pyscript for cmd2 versions 0.9.13 or less.


Invoke python command, shell, or script

Usage :

py <command>: Executes a Python command. py: Enters interactive Python mode.


Lists shortcuts (aliases) available

Usage :

shortcuts


View, run, edit, and save previously entered commands.

Usage :

history [-h] [-r | -e | -s | -o FILE | -t TRANSCRIPT] [arg]


show this help message and exit
run selected history items
edit and then run selected history items
script format; no separation lines
output commands to a script file
output commands and results to a transcript file


Unsets aliases

Usage :

unalias [-a] name [name ...]


•
name - name of the alias being unset

remove all alias definitions


Sets a settable parameter or shows current settings of parameters.

Usage :

set [-h] [-a] [-l] [settable [settable ...]]


•
Call without arguments for a list of settable parameters with their values.

show this help message and exit
display read-only settings as well
describe function of parameter


Edit a file in a text editor.

Usage:

edit [file_path]


•
file_path - path to a file to open in editor

Runs commands in script file that is encoded as either ASCII or UTF-8 text. Each command in the script should be separated by a newline.

Usage:

run_script <file_path>


•
file_path - a file path pointing to a script

NOTE:

This command is available as load for cmd2 versions 0.9.13 or less.


Execute a command as if at the OS prompt.

Usage:

shell <command> [arguments]


Find an item in File System

Usage:

locate [options] <name>


Count number of items found
Ignore case


Display file status.

Usage :

stat [-h] <file_name> [file_name ...]


Shows the help message


Create or Delete Snapshot

Usage:

snap {create|delete} <snap_name> <dir_name>


  • snap_name - Snapshot name to be created or deleted
  • dir_name - directory under which snapshot should be created or deleted

Set extended attribute for a file

Usage :

setxattr [-h] <path> <name> <value>


  • path - Path to the file
  • name - Extended attribute name to get or set
  • value - Extended attribute value to be set

-h, --help
Shows the help message


Get extended attribute value for the name associated with the path

Usage :

getxattr [-h] <path> <name>


  • path - Path to the file
  • name - Extended attribute name to get or set

-h, --help
Shows the help message


List extended attribute names associated with the path

Usage :

listxattr [-h] <path>


•
path - Path to the file

-h, --help
Shows the help message


Display amount of available disk space

Usage :

df [-h] [file [file ...]]


•
file - name of the file

-h, --help
Shows the help message


Show disk usage of a directory

Usage :

du [-h] [-r] [paths [paths ...]]


•
paths - name of the directory

-h, --help
Shows the help message
Recursive Disk usage of all directories


Quota management for a Directory

Usage :

quota [-h] [--max_bytes [MAX_BYTES]] [--max_files [MAX_FILES]] {get,set} path


  • {get,set} - quota operation type.
  • path - name of the directory.

-h, --help
Shows the help message
Set max cumulative size of the data under this directory
Set total number of files under this directory tree


By default, CephFS Shell looks for cephfs-shell.conf in the path provided by the environment variable CEPHFS_SHELL_CONF and then in user's home directory (~/.cephfs-shell.conf).

Right now, CephFS Shell inherits all its options from its dependency cmd2. Therefore, these options might vary with the version of cmd2 installed on your system. Refer to cmd2 docs for a description of these options.

Following is a sample cephfs-shell.conf

[cephfs-shell]
prompt = CephFS:~/>>>
continuation_prompt = >
quiet = False
timing = False
colors = True
debug = False
abbrev = False
autorun_on_edit = False
echo = False
editor = vim
feedback_to_output = False
locals_in_py = True


Following exit codes are returned by cephfs shell

Error Type Exit Code
Miscellaneous 1
Keyboard Interrupt 2
Operation not permitted 3
Permission denied 4
No such file or directory 5
I/O error 6
No space left on device 7
File exists 8
No data available 9
Invalid argument 10
Operation not supported on transport endpoint 11
Range error 12
Operation would block 13
Directory not empty 14
Not a directory 15
Disk quota exceeded 16
Broken pipe 17
Cannot send after transport endpoint shutdown 18
Connection aborted 19
Connection refused 20
Connection reset 21
Interrupted function call 22

~/.cephfs-shell.conf

2010-2024, Inktank Storage, Inc. and contributors. Licensed under Creative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)

April 19, 2024 dev