This is a text-only version of the following page on https://raymii.org:
---
Title : Openstack Swift Objectstore Access via FTP
Author : Remy van Elst
Date : 25-05-2014
URL : https://raymii.org/s/tutorials/Openstack-Swift-Objectstore-FTP-Access.html
Format : Markdown/HTML
---
![openStack Logo][1]
This is a guide on accessing the Openstack Swift Object Storage system using an
FTP client. Openstack Swift has a beautiful API which you can program to.
However, sometimes it is handy to quickly be able to access your
Swift/Objectstore data without programming around it. We will use ftp-cloudfs to
do this. There is also Softlayers swftp, but that does not support Keystone
Authentication (2.0). ftp-cloudfs does support this. The OS X Cyberduck FTP
client also has Openstack Swift support, however that is a native
implementation, not using FTP. With ftp-cloudfs we can use any ftp client, from
Filezilla to midnight commander.
[If you like this article, consider sponsoring me by trying out a Digital Ocean
VPS. With this link you'll get $100 credit for 60 days). (referral link)][2]
We will be using the Dutch provider [CloudVPS][3], which is the first European-
only Openstack Public Cloud, therefore not bound to the Patriot Act, so your
data is more safe than it is with a provider that is vulnerable to the Patriot
Act. [CloudVPS][4] provides 10GB free ObjectStore, if you have VPS with them,
the data is stored on at least 3 machines in 3 locations and they have a
boatload of certifications (ISO 27001 etc).
If you order a VPS or Objectstore at [CloudVPS][4], please mention my name or
this article. I'll get a little referal bonus, which will be used to keep this
awesome website running.
Note that this article is not sponsored nor endorsed by [CloudVPS][3], nor am I
speaking for or as [CloudVPS][3].
Openstack is one of those cloudy cloud projects. Warning, keep your buzzword
bingo cards ready for the [Wikipedia][5] definition:
OpenStack is a free and open-source software cloud computing platform. It is primarily deployed as an infrastructure as a service (IaaS) solution. The technology consists of a series of interrelated projects that control pools of processing, storage, and networking resources throughout a data center, able to be managed or provisioned through a web-based dashboard, command-line tools, or a RESTful API. It is released under the terms of the Apache License.
Basically it is a very nice project which provides an easy and scalable way to:
1. Virtualize (Compute / Nova) (KVM, VMWare, Xen)
2. Provide scalable object access (Swift / Objectstore) (like s3)
3. Manage it all using a nice dashboard (Horizon)
4. Have a great API which lets people develop applications for it.
5. Be open source. There is no vendor lock in, you can switch between any provider providing OpenStack.
In this tutorial we will focus on the Swift part, which provides s3 like access
to files, or, objects.
You can see all my [Openstack related tutorials here][6]. For example, how to
use [Duplicity to create Encrypted backups to the Openstack Swift Object
Store][7].
As said, Swift has a very nice API to program to. For example, you can create an
app for a TV show which streams extra video related to the TV show. This will be
a one time peak in traffic, depending on the TV show it can get pretty high in
volume. You don't want to set up all the capacity yourself, including scaling,
distributing files over multiple servers and load balancing it all. Swift
handles this for you. You do need to program to it, there is not an easy way
(yet) to access it in your file browser for example.
The project [ftp-cloudfs][8] solves this partly by acting as a proxy between the
Object Store API and an FTP client. Installation is easy, it can all be done via
[pip][9].
### Requirements
You will need the following:
* access to an Openstack Swift instance ([CloudVPS][4] for example)
* python 2.7
* python-keystoneclient (if you are going to use v2.0 authentication)
* python-swiftclient
* an ftp client
This tutorial was written and tested on Ubuntu 12.04 and CentOS 6, but works
everywhere the above requirements can be met.
### Installing packages
We need to make sure we have python 2, pip and the keystone client installed.
For Ubuntu/Debian:
apt-get install python-pip
For CentOS/RHEL:
yum install python-pip
Now we are going to install ftp-cloudfs, swiftclient and keystoneclient using
`pip`. You should do this in a python virtualenv, however that goes beyond the
scope of this tutorial.
pip install ftp-cloudfs python-keystoneclient python-swiftclient
### Running the FTP server
When that is all finished we can start the ftp proxy like so:
ftpcloudfs --foreground --keystone-auth --auth-url https://identity.stack.cloudvps.com/v2.0
This will start up the FTP server in the foreground on port 2021, talking to the
[CloudVPS][4] Swift Object Store.
`ftp-cloudfs` has the following usage options:
Usage: ftpcloudfs [options]
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)
--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)
For CloudVPS, the username will be in the form of:
`TENANTNAME.EMAIL@ADDRESS.EXT`. For example, `BLA000066
Cinderella.user@example.org`. If you have a tenant (tenant means project in
Openstack terminology) with a dot in the name, you can use the `--keystone-
tenant-separator` option to change it in, for example, a `\` backslash.
Now use your FTP client to connect to the server and there's your Object Store.
There are some limitations:
* you can not place files in the top level folder, you need a subfolder. This is because top level are containers.
* you can not rename a non-empty directory. You will get a `550 Directory not empty.` error.
* you can not recursively delete a folder. That is handled by most clients, filezilla understands that it has to go in every folder and remove all the things and then remove the folder.
* top level folders are created as private containers. You will need to change them to public if that is needed.
These limitations come from the fact that we are not talking to a file system
block storage, but to object storage. Try to force a square through a circle,
and then appreciate how well ftp-cloudfs handles this.
To set the ftp proxy open for other users, set the `--bind-address` to
`0.0.0.0`. Remember that there is no encryption on FTP, so make sure you handle
that in a different way.
### Authentication Data
If you are unsure about what data you should use to authenticate you can use the
[Openstack API][9] to get that data. Your provider may for example not have it
in a logical place. The Openstack Horizon dashboard provides all the required
data and URLs under the "Access and Security --> API Access".
First get an authentication token using cURL:
curl -i 'https://identity.stack.cloudvps.com/v2.0/tokens' -X POST -H "Content-Type: application/json" -H "Accept: application/json" -d '{"auth": {"tenantName": "", "passwordCredentials": {"username": "user@example.com", "password": "passw0rd"}}}'
Response:
HTTP/1.1 200 OK
Vary: X-Auth-Token
Content-Type: application/json
Content-Length: 543
Connection: close
{
"access": {
"token": {
"issued_at": "2014-05-19T03:24:50.971373",
"expires": "2014-05-20T03:24:50Z",
"id": "8g2CeQ3kM0tkRAEiu6KmGaI6M8NLFDJ8WQ"
},
"serviceCatalog": [],
"user": {
"username": "user@example.com",
"roles_links": [],
"id": "J0XPUWipImRpkFXAVxJYELAXnXx26jPPj9w",
"roles": [],
"name": "user@example.com"
},
"metadata": {
"is_admin": 0,
"roles": []
}
}
}
The token is the first `id`. In this case: `8g2CeQ3kM0tkRAEiu6KmGaI6M8NLFDJ8WQ`.
Use the token to get a list of tenants for that token:
curl -i -X GET 'https://identity.stack.cloudvps.com/v2.0/tenants' -H "User-Agent: python-keystoneclient" -H "X-Auth-Token: 8g2CeQ3kM0tkRAEiu6KmGaI6M8NLFDJ8WQ"
Response:
HTTP/1.1 200 OK
Vary: X-Auth-Token
Content-Type: application/json
Content-Length: 523
Connection: close
{
"tenants_links": [],
"tenants": [
{
"handle": "HANDLE",
"description": "HANDLE Projectname",
"enabled": true,
"id": "zORIDFV4ybpbV9bRg1gwNi7NNnTiCw",
"name": "HANDLE Projectname"
},
{
"handle": "HANDLE",
"description": "Main Customer Tenant",
"enabled": true,
"id": "vnsdmwzPSl8dHm2RQQe",
"name": "HANDLE"
}
]
}
The part you want to have is the `"name": "HANDLE Projectname"` part. That is
your tenant.
### Screenshot
Here is a screenshot of Filezilla uploading a copy of this website to the Object
Store:
![filezilla][10]
[1]: https://raymii.org/s/inc/img/openstack.jpg
[2]: https://www.digitalocean.com/?refcode=7435ae6b8212
[3]: http://www.cloudvps.com
[4]: http://www.cloudvps.com/openstack/object-store/
[5]: https://en.wikipedia.org/wiki/OpenStack
[6]: https://raymii.org/s/tags/openstack.html
[7]: https://raymii.org/s/tutorials/Encrypted_Duplicity_Backups_to_Openstack_Swift_Objectstore.html
[8]: https://github.com/cloudfs/ftp-cloudfs
[9]: http://docs.openstack.org/api/quick-start/content/
[10]: https://raymii.org/s/inc/img/filezilla-swift.png
---
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