Overview

You can use the OpenStack APIs to generate different scripts in order to automate your actions on the Public Cloud.
The OpenStack Swift client lets you interact with and manage your containers and objects.

For example you can upload files to your containers regularly in order to back them up.

This guide will help you get to grips with the OpenStack APIs so you can manage your object containers using the Python-Swiftclient.
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Prerequisites

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Swift documentation

You can get the list of possible commands from the client's documentation:

admin@serveur-1:~$ swift --help

Here is the list of the main commands:

delete Deletes a container or objects within a container
download Downloads objects from containers
list Lists the containers for the account or the objects for a container
post Updates meta information for the account, container, or object. If the container is not found, it will be created automatically.
stat Displays information for the account, container, or object
upload Uploads specified files and directories to the given container
capabilities Retrieves capability of the proxy.
tempurl Generates a temporary URL for a Swift object
For help on a specific Swift command, enter "--help" at the end of it:

admin@serveur-1:~$ swift post --help

Updates meta information for the account, container, or object.
If the container is not found, it will be created automatically.


Positional arguments:
[container] Name of container to post to.
[object] Name of object to post. Specify multiple times
for multiple objects.
[...]
You can also find the Swift client documentation on the OpenStack website

Basic operations

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Creating a public object container

  • Create the container "container1"

  • admin@serveur-1:~$ swift post container1

  • Configure the access rights to make your container public

  • admin@serveur-1:~$ swift post --header "X-Container-Read: .r:*" container1

  • Check container configuration

  • admin@serveur-1:~$ swift stat container1
    
    Account: AUTH_b3e26xxxxxxxxxxxxxxxxxxxb0ba29
    Container: container1
    Objects: 0
    Bytes: 0
    Read ACL: .r:*
    Write ACL:
    Sync To:
    Sync Key:
    Accept-Ranges: bytes
    X-Trans-Id: B2210C05:8D93_052711A1:01BB_561CC9DF_1B305:30D7
    X-Storage-Policy: Policy-0
    Connection: close
    X-Timestamp: 1444726875.27475
    Content-Type: text/plain; charset=utf-8
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Upload files to your container

  • Uploading the content of a local folder to a container

  • admin@serveur-1:~$ swift upload container1 images/
    
    images/OVHlogo.png
    images/OVHSummitKeynote.jpg
A prefix will automatically be added to your files if you send an entire folder and not a single file.
  • List a container's files

  • admin@serveur-1:~$ swift list container1
    
    images/OVHSummitKeynote.jpg
    images/OVHlogo.png
    text1.txt
    text2.txt
    text3.txt
You can display the files with a particular prefix using the "--prefix" argument:

admin@serveur-1:~$ swift list container1 --prefix images

images/OVHSummitKeynote.jpg
images/OVHlogo.png
If the container is configured as public, you can access the file using a URL:
https://storage.gra1.cloud.ovh.net/v1/AUTH_b3e26xxxxxxxxxxxxxxxxxxxb0ba29/container1/images/OVHlogo.png
This URL is made up of an endpoint, which you can get from the Access and Security in Horizon menu in Horizon, the name of your container and the name of your object (including the prefix).
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Download files

  • Download a file:

  • admin@serveur-1:~$ swift download container1 text1.txt
    
    text1.txt [auth 0.328s, headers 0.452s, total 0.453s, 0.000 MB/s]
You can download lots of files with the same prefix, using the following command:

admin@serveur-1:~$ swift download container1 --prefix images

images/OVHlogo.png [auth 0.383s, headers 0.520s, total 0.522s, 0.135 MB/s]
images/OVHSummitKeynote.jpg [auth 0.371s, headers 0.514s, total 0.559s, 2.657 MB/s]
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Deleting containers or objects

  • Delete a file:

  • admin@serveur-1:~$ swift delete container1 text1.txt
    
    text1.txt
As with downloading, you can delete lots of files using the same prefix, with the following command:
admin@serveur-1:~$ swift 
delete container1 images/*

images/OVHSummitKeynote.jpg
images/OVHlogo.png
  • Delete a container

  • admin@serveur-1:~$ swift delete container1
    
    text2.txt
    text3.txt
This will delete all the files in the container.