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OpenStack Ussuri : How to use Swift
2020/06/11
 
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 unnecessary to add a new user, it's posibble to use with existing admin or swift user on Keystone.
# create [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          | 87b1d1e7adee45fa8b795fcfce82f276 |
| is_domain   | False                            |
| name        | swiftservice                     |
| options     | {}                               |
| parent_id   | default                          |
| tags        | []                               |
+-------------+----------------------------------+

# create [SwiftOperator] role

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

+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | None                             |
| domain_id   | None                             |
| id          | 227ce88634af424e90f8f6974e8ed3a5 |
| name        | SwiftOperator                    |
| options     | {}                               |
+-------------+----------------------------------+

# add a user

[root@dlp ~(keystone)]#
openstack user create --domain default --project swiftservice --password userpassword swiftuser01

+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| default_project_id  | 87b1d1e7adee45fa8b795fcfce82f276 |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | 658ed7ada25e44dca27e9b2648157a51 |
| name                | swiftuser01                      |
| options             | {}                               |
| password_expires_at | None                             |
+---------------------+----------------------------------+

# add the user to [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.
# install from Ussuri, EPEL, PowerTools

[root@client ~]#
dnf --enablerepo=centos-openstack-ussuri,PowerTools,epel -y install python3-openstackclient python3-keystoneclient python3-swiftclient
[3] Load environment variables first. ( it's just the value for a user added in [1] )
[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 status

[root@client ~(swift)]#
swift stat

               Account: AUTH_87b1d1e7adee45fa8b795fcfce82f276
            Containers: 0
               Objects: 0
                 Bytes: 0
          Content-Type: text/plain; charset=utf-8
           X-Timestamp: 1591752325.98893
       X-Put-Timestamp: 1591752325.98893
                  Vary: Accept
            X-Trans-Id: txc86186e6403446f19d727-005ee03685
X-Openstack-Request-Id: txc86186e6403446f19d727-005ee03685
[4] Create a Container for saving files.
[root@client ~(swift)]#
openstack container create test_container

+---------------------------------------+----------------+------------------------------------+
| account                               | container      | x-trans-id                         |
+---------------------------------------+----------------+------------------------------------+
| AUTH_87b1d1e7adee45fa8b795fcfce82f276 | test_container | tx0ab3d4e8bc664335b5af0-005ee03698 |
+---------------------------------------+----------------+------------------------------------+

[root@client ~(swift)]#
openstack container list

+----------------+
| Name           |
+----------------+
| test_container |
+----------------+
[5] Upload a file on local to the Container.
[root@client ~(swift)]#
openstack object create test_container testfile.txt

+--------------+----------------+----------------------------------+
| object       | container      | etag                             |
+--------------+----------------+----------------------------------+
| testfile.txt | test_container | afcd2f4903521cec2e268743ace2de05 |
+--------------+----------------+----------------------------------+

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

+--------------+
| Name         |
+--------------+
| testfile.txt |
+--------------+
[6] Download a file from Swift Storage to local.
[root@client ~(swift)]#
rm testfile.txt
[root@client ~(swift)]#
openstack object save test_container testfile.txt

[root@client ~(swift)]#
total 12
-rw-------. 1 root root 1534 Oct 12  2019 anaconda-ks.cfg
-rw-------. 1 root root  283 Jun 10 10:25 keystonerc_swift
-rw-r--r--. 1 root root   19 Jun 10 10:27 testfile.txt
[7] Delete a file on Swift Storage.
[root@client ~(swift)]#
openstack object delete test_container testfile.txt

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

# [testfile.txt] has been removed

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

[root@client ~(swift)]#
openstack container list

# [test_container] has been removed
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