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OpenStack Rocky : How to use Swift
2019/08/22
 
This section shows how to use Swift Storage from Clients.
This example is based on the emvironment like follows.
------------+---------------------------+-------------+---
            |                           |             |
        eth0|10.0.0.30              eth0|10.0.0.50    |
+-----------+-----------+   +-----------+-----------+ |
|    [ Control Node ]   |   |    [  Proxy Node  ]   | |
|                       |   |                       | |
|  MariaDB    RabbitMQ  |   |      Swift Proxy      | |
|  Memcached  httpd     |   |                       | |
|  Keystone             |   |                       | |
+-----------------------+   +-----------------------+ |
                                                      |
------------+---------------------------+-------------+-------------+-----------
        eth0|10.0.0.71              eth0|10.0.0.72              eth0|10.0.0.73
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|   [ Storage Node#1 ]  |   |   [ Storage Node#2 ]  |   |   [ Storage Node#3 ]  |
|                       |   |                       |   |                       |
|     Swift-Account     |   |     Swift-Account     |   |     Swift-Account     |
|    Swift-Container    |   |    Swift-Container    |   |    Swift-Container    |
|     Swift-Object      |   |     Swift-Object      |   |     Swift-Object      |
+-----------------------+   +-----------------------+   +-----------------------+

[1] Add a user for using Swift on Keystone Control Node.
By the way, if you'd like to use Swift Quickly, it's unnecessarry to add a new user, it's posibble to use with existing admin or swift user on Keystone.
# add swiftservice project

root@dlp ~(keystone)#
openstack project create --domain default --description "Swift Service Project" swiftservice

+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | Swift Service Project            |
| domain_id   | default                          |
| enabled     | True                             |
| id          | ae98eac2f9c24f108c7b6ebc78508faf |
| is_domain   | False                            |
| name        | swiftservice                     |
| parent_id   | default                          |
| tags        | []                               |
+-------------+----------------------------------+

# add SwiftOperator role

root@dlp ~(keystone)#
openstack role create SwiftOperator

+-----------+----------------------------------+
| Field     | Value                            |
+-----------+----------------------------------+
| domain_id | None                             |
| id        | 74be5b0708d042a2b2421263352d1e4d |
| name      | SwiftOperator                    |
+-----------+----------------------------------+

# add a user

root@dlp ~(keystone)#
openstack user create --domain default --project swiftservice --password userpassword Swiftuser01

+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| default_project_id  | ae98eac2f9c24f108c7b6ebc78508faf |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | 1ac8932790544087a9f3beeb46b7e5d9 |
| name                | Swiftuser01                      |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+

# add the user in SwiftOperator role

root@dlp ~(keystone)#
openstack role add --project swiftservice --user Swiftuser01 SwiftOperator
[2] Work on a Client from here and later.
Install Keystoneclient, Swiftclient on a Client first.
root@client:~#
apt -y install python-openstackclient python-keystoneclient python-swiftclient
[3] Login as a user and Load environment variables of the user for Swift added on [1] section.
root@client:~#
vi ~/keystonerc_swift
export OS_PROJECT_DOMAIN_NAME=default
export OS_USER_DOMAIN_NAME=default
export OS_PROJECT_NAME=swiftservice
export OS_USERNAME=Swiftuser01
export OS_PASSWORD=userpassword
export OS_AUTH_URL=http://10.0.0.30:5000/v3
export OS_IDENTITY_API_VERSION=3
export PS1='\u@\h \W(swift)\$ '
root@client:~#
chmod 600 ~/keystonerc_swift

root@client:~#
source ~/keystonerc_swift

root@client ~(swift)#
echo "source ~/keystonerc_swift " >> ~/.bash_profile
# show state

root@client ~(swift)#
swift stat

               Account: AUTH_ae98eac2f9c24f108c7b6ebc78508faf
            Containers: 0
               Objects: 0
                 Bytes: 0
       X-Put-Timestamp: 1566440083.15973
           X-Timestamp: 1566440083.15973
            X-Trans-Id: tx07d61db0a7c144879231e-005d5dfa91
          Content-Type: text/plain; charset=utf-8
X-Openstack-Request-Id: tx07d61db0a7c144879231e-005d5dfa91
[4] Create a Container for saving files.
root@client ~(swift)#
openstack container create test_container

+---------------------------------------+----------------+------------------------------------+
| account                               | container      | x-trans-id                         |
+---------------------------------------+----------------+------------------------------------+
| AUTH_ae98eac2f9c24f108c7b6ebc78508faf | test_container | txf23e15382bc44d12bb993-005d5dfaa3 |
+---------------------------------------+----------------+------------------------------------+

root@client ~(swift)#
openstack container list

+----------------+
| Name           |
+----------------+
| test_container |
+----------------+
[5] Upload a file on local to the Container.
# upload test.txt

root@client ~(swift)#
openstack object create test_container test.txt

+----------+----------------+----------------------------------+
| object   | container      | etag                             |
+----------+----------------+----------------------------------+
| test.txt | test_container | c199177c8f0bfea8fefbb792374a0cb9 |
+----------+----------------+----------------------------------+

root@client ~(swift)#
openstack object list test_container

+----------+
| Name     |
+----------+
| test.txt |
+----------+
[6] Download a file from Swift Storage to local.
# remove local file

root@client ~(swift)#
rm test.txt
root@client ~(swift)#
openstack object save test_container test.txt

root@client ~(swift)#
total 8
-rw------- 1 root root 281 Aug 22 11:14 keystonerc_swift
-rw-r--r-- 1 root root  16 Aug 22 11:16 test.txt
[7] Delete a file on Swift Storage.
root@client ~(swift)#
openstack object delete test_container test.txt

root@client ~(swift)#
openstack object list test_container

# test.txt is deleted

[8] Delete a Container on Swift Storage.
root@client ~(swift)#
openstack container delete test_container

root@client ~(swift)#
openstack container list

# test_container is deleted
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