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書名： OpenStack Cloud Computing Cookbook（Third Edition）
作者名： Kevin Jackson Cody Bunch Egle Sigler
本章字?jǐn)?shù)： 355字
更新時(shí)間： 2021-07-16 20:39:13

Configuring roles in Keystone

Roles are the permissions given to users within a tenant. Here, we will configure two roles: an admin role that allows for the administration of our environment, and a member role that is given to ordinary users who will be using the cloud environment.

Getting ready

We will be using the keystone client to operate Keystone. If the python-keystoneclient tool isn't available, follow the steps described at http://bit.ly/OpenStackCookbookClientInstall.

Ensure that we have our environment set correctly to access our OpenStack environment for administrative purposes:

export OS_TENANT_NAME=cookbook
export OS_USERNAME=admin
export OS_PASSWORD=openstack
export OS_AUTH_URL=https://192.168.100.200:5000/v2.0/
export OS_NO_CACHE=1
export OS_KEY=/vagrant/cakey.pem
export OS_CACERT=/vagrant/ca.pem

Tip

You can use the controller node if no other machines are available on your network, as this has the python-keystoneclient and the relevant access to the OpenStack environment. If you are using the Vagrant environment, issue the following command to get access to the Controller:

vagrant ssh controller

How to do it...

To create the required roles in our OpenStack environment, perform the following steps:

Create the admin role as follows:

# admin role
keystone role-create --name admin
You will get an output like this:
+----------+----------------------------------+
| Property | Value |
+----------+----------------------------------+
| id | 625b81ae9f024366bbe023a62ab8a18d |
| name | admin |
+----------+----------------------------------+

To create the Member role, we repeat the step and specify the Member role:
```
# Member role
keystone role-create --name Member
```

How it works...

Creation of the roles is simply achieved by using the keystone client and specifying the role-create option with the following syntax:

keystone role-create --name role_name

The role_name attribute can't be arbitrary for admin and Member roles. The admin role has been set by default in /etc/keystone/policy.json as having administrative rights:

{
 "admin_required": [["role:admin"], ["is_admin:1"]]
}

The Member role is also configured by default in the OpenStack Dashboard, Horizon, for a non-admin user created through the web interface.

On creation of the role, the ID associated with is returned, and we can use it when assigning roles to users. To see a list of roles and the associated IDs in our environment, we can issue the following command:

keystone role-list

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OpenStack Cloud Computing Cookbook（Third Edition）

Configuring roles in Keystone

Getting ready

Tip

How to do it...

How it works...