Merge pull request #2989 from lorin/keystone_user

OpenStack Identity (keystone) user module

library/cloud/keystone_user

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# Based on Jimmy Tang's implementation
+
+DOCUMENTATION = '''
+---
+module: keystone_user
+short_description: Manage OpenStack Identity (keystone) users, tenants and roles
+requirements: [ python-keystoneclient ]
+examples:
+   - code: 'keystone_user: tenant=demo tenant_description="Default Tenant"'
+     description: Create a tenant
+   - code: 'keystone_user: user=john tenant=demo password=secrete'
+     description: Create a user
+   - code: 'keystone_user: role=admin user=john tenant=demo'
+     description: Apply the admin role to the john user in the demo tenant
+author: Lorin Hochstein
+'''
+
+try:
+    from keystoneclient.v2_0 import client
+except ImportError:
+    keystoneclient_found = False
+else:
+    keystoneclient_found = True
+
+
+def authenticate(endpoint, token, login_user, login_password):
+    """Return a keystone client object"""
+
+    if token:
+        return client.Client(endpoint=endpoint, token=token)
+    else:
+        return client.Client(endpoint=endpoint, username=login_user,
+                             password=login_password)
+
+
+def tenant_exists(keystone, tenant):
+    """ Return True if tenant already exists"""
+    return tenant in [x.name for x in keystone.tenants.list()]
+
+
+def user_exists(keystone, user):
+    """" Return True if user already exists"""
+    return user in [x.name for x in keystone.users.list()]
+
+
+def get_tenant(keystone, name):
+    """ Retrieve a tenant by name"""
+    tenants = [x for x in keystone.tenants.list() if x.name == name]
+    count = len(tenants)
+    if count == 0:
+        raise KeyError("No keystone tenants with name %s" % name)
+    elif count > 1:
+        raise ValueError("%d tenants with name %s" % (count, name))
+    else:
+        return tenants[0]
+
+
+def get_user(keystone, name):
+    """ Retrieve a user by name"""
+    users = [x for x in keystone.users.list() if x.name == name]
+    count = len(users)
+    if count == 0:
+        raise KeyError("No keystone users with name %s" % name)
+    elif count > 1:
+        raise ValueError("%d users with name %s" % (count, name))
+    else:
+        return users[0]
+
+
+def get_role(keystone, name):
+    """ Retrieve a role by name"""
+    roles = [x for x in keystone.roles.list() if x.name == name]
+    count = len(roles)
+    if count == 0:
+        raise KeyError("No keystone roles with name %s" % name)
+    elif count > 1:
+        raise ValueError("%d roles with name %s" % (count, name))
+    else:
+        return roles[0]
+
+
+def get_tenant_id(keystone, name):
+    return get_tenant(keystone, name).id
+
+
+def get_user_id(keystone, name):
+    return get_user(keystone, name).id
+
+
+def ensure_tenant_exists(keystone, tenant_name, tenant_description,
+                         check_mode):
+    """ Ensure that a tenant exists.
+
+        Return (True, id) if a new tenant was created, (False, None) if it
+        already existed.
+    """
+
+    # Check if tenant already exists
+    try:
+        tenant = get_tenant(keystone, tenant_name)
+    except KeyError:
+        # Tenant doesn't exist yet
+        pass
+    else:
+        if tenant.description == tenant_description:
+            return (False, tenant.id)
+        else:
+            # We need to update the tenant description
+            if check_mode:
+                return (True, tenant.id)
+            else:
+                tenant.update(description=tenant_description)
+                return (True, tenant.id)
+
+    # We now know we will have to create a new tenant
+    if check_mode:
+        return (True, None)
+
+    ks_tenant = keystone.tenants.create(tenant_name=tenant_name,
+                                        description=tenant_description,
+                                        enabled=True)
+    return (True, ks_tenant.id)
+
+
+def ensure_tenant_absent(keystone, tenant, check_mode):
+    """ Ensure that a tenant does not exist
+
+         Return True if the tenant was removed, False if it didn't exist
+         in the first place
+    """
+    if not tenant_exists(keystone, tenant):
+        return False
+
+    # We now know we will have to delete the tenant
+    if check_mode:
+        return True
+
+
+def ensure_user_exists(keystone, user_name, password, email, tenant_name,
+                       check_mode):
+    """ Check if user exists
+
+        Return (True, id) if a new user was created, (False, id) user alrady
+        exists
+    """
+
+    # Check if tenant already exists
+    try:
+        user = get_user(keystone, user_name)
+    except KeyError:
+        # Tenant doesn't exist yet
+        pass
+    else:
+        # User does exist, we're done
+        return (False, user.id)
+
+    # We now know we will have to create a new user
+    if check_mode:
+        return (True, None)
+
+    tenant = get_tenant(keystone, tenant_name)
+
+    user = keystone.users.create(name=user_name, password=password,
+                                 email=email, tenant_id=tenant.id)
+    return (True, user.id)
+
+
+def ensure_role_exists(keystone, user_name, tenant_name, role_name,
+                       check_mode):
+    """ Check if role exists
+
+        Return (True, id) if a new role was created or if the role was newly
+        assigned to the user for the tenant. (False, id) if the role already
+        exists and was already assigned to the user ofr the tenant.
+
+    """
+    # Check if the user has the role in the tenant
+    user = get_user(keystone, user_name)
+    tenant = get_tenant(keystone, tenant_name)
+    roles = [x for x in keystone.roles.roles_for_user(user, tenant)
+                     if x.name == role_name]
+    count = len(roles)
+
+    if count == 1:
+        # If the role is in there, we are done
+        role = roles[0]
+        return (False, role.id)
+    elif count > 1:
+        # Too many roles with the same name, throw an error
+        raise ValueError("%d roles with name %s" % (count, role_name))
+
+    # At this point, we know we will need to make changes
+    if check_mode:
+        return (True, None)
+
+    # Get the role if it exists
+    try:
+        role = get_role(keystone, role_name)
+    except KeyError:
+        # Role doesn't exist yet
+        role = keystone.roles.create(role_name)
+
+    # Associate the role with the user in the admin
+    keystone.roles.add_user_role(user, role, tenant)
+    return (True, role.id)
+
+
+def ensure_user_absent(keystone, user, check_mode):
+    raise NotImplementedError("Not yet implemented")
+
+
+def ensure_role_absent(keystone, uesr, tenant, role, check_mode):
+    raise NotImplementedError("Not yet implemented")
+
+
+def main():
+
+    module = AnsibleModule(
+        argument_spec=dict(
+            user=dict(required=False),
+            password=dict(required=False),
+            tenant=dict(required=False),
+            tenant_description=dict(required=False),
+            email=dict(required=False),
+            role=dict(required=False),
+            state=dict(default='present', choices=['present', 'absent']),
+            endpoint=dict(required=False,
+                          default="http://127.0.0.1:35357/v2.0"),
+            token=dict(required=False),
+            login_user=dict(required=False),
+            login_password=dict(required=False)
+        ),
+        supports_check_mode=True,
+        mutually_exclusive=[['token', 'login_user'],
+                            ['token', 'login_password']]
+    )
+
+    if not keystoneclient_found:
+        module.fail_json(msg="the python-keystoneclient module is required")
+
+    user = module.params['user']
+    password = module.params['password']
+    tenant = module.params['tenant']
+    tenant_description = module.params['tenant_description']
+    email = module.params['email']
+    role = module.params['role']
+    state = module.params['state']
+    endpoint = module.params['endpoint']
+    token = module.params['token']
+    login_user = module.params['login_user']
+    login_password = module.params['login_password']
+
+    keystone = authenticate(endpoint, token, login_user, login_password)
+
+    check_mode = module.check_mode
+
+    try:
+        d = dispatch(keystone, user, password, tenant, tenant_description,
+                     email, role, state, endpoint, token, login_user,
+                     login_password, check_mode)
+    except Exception as e:
+        if check_mode:
+            # If we have a failure in check mode
+            module.exit_json(changed=True,
+                             msg="exception: %s" % e.message)
+        else:
+            module.fail_json(msg=e.message)
+    else:
+        module.exit_json(**d)
+
+
+def dispatch(keystone, user=None, password=None, tenant=None,
+             tenant_description=None, email=None, role=None,
+             state="present", endpoint=None, token=None, login_user=None,
+             login_password=None, check_mode=False):
+    """ Dispatch to the appropriate method.
+
+        Returns a dict that will be passed to exit_json
+
+        tenant  user  role   state
+        ------  ----  ----  --------
+          X                  present     ensure_tenant_exists
+          X                  absent      ensure_tenant_absent
+          X      X           present     ensure_user_exists
+          X      X           absent      ensure_user_absent
+          X      X     X     present     ensure_role_exists
+          X      X     X     absent      ensure_role_absent
+
+
+        """
+    changed = False
+    id = None
+    if tenant and not user and not role and state == "present":
+        changed, id = ensure_tenant_exists(keystone, tenant,
+                                           tenant_description, check_mode)
+    elif tenant and not user and not role and state == "absent":
+        changed = ensure_tenant_absent(keystone, tenant, check_mode)
+    elif tenant and user and not role and state == "present":
+        changed, id = ensure_user_exists(keystone, user, password,
+                                         email, tenant, check_mode)
+    elif tenant and user and not role and state == "absent":
+        changed = ensure_user_absent(keystone, user, check_mode)
+    elif tenant and user and role and state == "present":
+        changed, id = ensure_role_exists(keystone, user, tenant, role,
+                                         check_mode)
+    elif tenant and user and role and state == "absent":
+        changed = ensure_role_absent(keystone, user, tenant, role, check_mode)
+    else:
+        # Should never reach here
+        raise ValueError("Code should never reach here")
+
+    return dict(changed=changed, id=id)
+
+# this is magic, see lib/ansible/module_common.py
+#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+if __name__ == '__main__':
+    main()