CentOS 7
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OpenStack Rocky : How to use Swift
2018/09/03
 
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          | a1f297f56f014a59b4dc06abab17de1f |
| 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        | 17a29f2197d74bf2aa9c7dc81497574e |
| name      | SwiftOperator                    |
+-----------+----------------------------------+

# add a user

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

+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| default_project_id  | a1f297f56f014a59b4dc06abab17de1f |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | d49f19878a224398b25ff1f628f343cd |
| 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.
# install from Rocky, EPEL

[root@client ~]#
yum --enablerepo=centos-openstack-rocky,epel -y install python-openstackclient python-keystoneclient python-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_a1f297f56f014a59b4dc06abab17de1f
            Containers: 0
               Objects: 0
                 Bytes: 0
       X-Put-Timestamp: 1535958564.78869
           X-Timestamp: 1535958564.78869
            X-Trans-Id: tx38e11e44fce94548b4da6-005b8cde24
          Content-Type: text/plain; charset=utf-8
X-Openstack-Request-Id: tx38e11e44fce94548b4da6-005b8cde24
[4] Create a Container for saving files.
[root@client ~(swift)]#
openstack container create test_container

+---------------------------------------+----------------+------------------------------------+
| account                               | container      | x-trans-id                         |
+---------------------------------------+----------------+------------------------------------+
| AUTH_a1f297f56f014a59b4dc06abab17de1f | test_container | txf905afac028e4fd69cc9e-005b8cde4a |
+---------------------------------------+----------------+------------------------------------+

[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 | 3265825765bedcb5e8a0ea8827de62fa |
+----------+----------------+----------------------------------+

[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 12
-rw-------. 1 root root 1437 Feb  8  2018 anaconda-ks.cfg
-rw-------. 1 root root  283 Sep  3 19:09 keystonerc_swift
-rw-r--r--. 1 root root    9 Sep  3 19:11 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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