FTP interface to OpenStack Object Storage (Swift)
ftp-cloudfs is a ftp server acting as a proxy to OpenStack Object Storage (swift). It allow you to connect via any FTP client to do upload/download or create containers.
By default the server will bind to port 2021 which allow to be run as a non root/administrator user.
It supports pseudo-hierarchical folders/directories as described in the OpenStack Object Storage API.
- Python 2 >= 2.6
- python-swiftclient >= 2.1.0 - https://github.com/openstack/python-swiftclient/
- pyftpdlib >= 1.3.0 - http://code.google.com/p/pyftpdlib/
- python-daemon >= 1.5.5 - http://pypi.python.org/pypi/python-daemon/
- python-memcache >= 1.45 - http://www.tummy.com/Community/software/python-memcached/
IMPORTANT: pyftpdlib 1.2.0 has a couple of known issues (memory leak, file descriptor leak) and it shouldn’t be used in production systems.
python-swiftclient 2.x uses Requests and it is currently incompatible with ftp-cloudfs < 0.30.
ftp-cloudfs is developed and tested in Ubuntu and Debian Linux distributions but it should work on any Unix-like (including Mac OS X) as long as you install the requirements listed above.
Use standard setup.py directives ie.:
python setup.py install
Or if you have pip installed you can just run:
pip install ftp-cloudfs
which will install ftp-cloudfs with all the required dependencies.
We also provide a requirements.txt file in case you want to install all the dependencies using pip without installing ftp-cloudfs:
pip install -r requirements.txt
ftp-cloudfs has been included in Debian Jessie.
The install should have created a /usr/bin/ftpcloudfs (or whatever prefix defined in your python distribution or command line arguments) which can be used like this:
Usage: ftpcloudfs [options]
--version show program’s version number and exit -h, --help show this help message and exit -p PORT, --port=PORT Port to bind the server (default: 2021) -b BIND_ADDRESS, --bind-address=BIND_ADDRESS Address to bind (default: 127.0.0.1) -a AUTHURL, --auth-url=AUTHURL Authentication URL (required) --insecure Allow to access servers without checking SSL certs --memcache=MEMCACHE Memcache server(s) to be used for cache (ip:port) -v, --verbose Be verbose on logging -f, --foreground Do not attempt to daemonize but run in foreground -l LOG_FILE, --log-file=LOG_FILE Log File: Default stdout when in foreground --syslog Enable logging to the system logger (daemon facility) --pid-file=PID_FILE Pid file location when in daemon mode --uid=UID UID to drop the privilige to when in daemon mode --gid=GID GID to drop the privilige to when in daemon mode --keystone-auth Use auth 2.0 (Keystone, requires keystoneclient) --keystone-region-name=REGION_NAME Region name to be used in auth 2.0 --keystone-tenant-separator=TENANT_SEPARATOR Character used to separate tenant_name/username in auth 2.0 (default: TENANT.USERNAME) --keystone-service-type=SERVICE_TYPE Service type to be used in auth 2.0 (default: object- store) --keystone-endpoint-type=ENDPOINT_TYPE Endpoint type to be used in auth 2.0 (default: publicURL)
The defaults can be changed using a configuration file (by default in /etc/ftpcloudfs.conf). Check the example file included in the package.
OpenStack Object Storage (Swift) is an object storage and not a real file system. This proxy simulates enough file system functionality to be used over FTP, but it has a performance impact.
To improve the performance a cache is used. It can be local or external (with Memcache). By default a local cache is used, unless one or more Memcache servers are configured.
If you’re using just one client the local cache may be fine, but if you’re using several connections, configuring an external cache is highly recommended.
If an external cache is available it will be used to cache authentication tokens too so any Memcache server must be secured to prevent unauthorized access as it could be possible to associate a token with a specific user (not trivial) or even use the cache key (MD5 hash) to brute-force the user password.
By default ftp-cloudfs will use Swift auth 1.0, that is compatible with OpenStack Object Storage using swauth auth middleware and Swift implementations such as Rackspace Cloud Files or Memset’s Memstore Cloud Storage.
Optionally OpenStack Identity Service 2.0 can be used. Currently python-keystoneclient (0.3.2+ recommended) is required to use auth 2.0 and it can be enabled with keystone-auth option.
You can provide a tenant name in the FTP login user with TENANT.USERNAME (using a dot as separator). Please check the example configuration file for further details.
LARGE FILE SUPPORT
The object storage has a limit on the size of a single uploaded object (by default this is 5GB). Files larger than that can be split in parts and merged back on the fly using a manifest file.
ftp-cloudfs supports this transparently with the split-large-files configuration token, setting it to the number of megabytes wanted to use for each part (disabled by default).
When a FILE is larger than the specified amount of MB, a FILE.part directory will be created and n parts will be created splitting the file automatically. The original file name will be used to store the manifest. If the original file is downloaded, the parts will be served as it was a single file.
The FILE.part directory can be removed from directory listings using the hide-part-dir configuration token. Please be aware that the directory will still be visible when accessing the storage using swift API.
The project website is at:
There you can file bug reports, ask for help or contribute patches. There’s additional information at:
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