meter_id contains postfix \n

[ZhiQiang Fan]

# zypper pa | grep ceilometer-api
v | Havana | openstack-ceilometer-api | 2013.2.2.dev6.g16eb199-1.1 | x86_64

# ceilometer --debug meter-list -q resource=7e4efa20-a852-4995-b8f0-cdb104cadcaf

[{"user_id": "30aee73695744a6096e35fdab25b6766", "name": "volume.size", "resource_id": "7e4efa20-a852-4995-b8f0-cdb104cadcaf", "source": "openstack", "meter_id": "N2U0ZWZhMjAtYTg1Mi00OTk1LWI4ZjAtY2RiMTA0Y2FkY2FmK3ZvbHVtZS5zaXpl\n", "project_id": "313a8bc21b994e60b93d6fff7c1e0c1b", "type": "gauge", "unit": "GB"}, {"user_id": "30aee73695744a6096e35fdab25b6766", "name": "volume", "resource_id": "7e4efa20-a852-4995-b8f0-cdb104cadcaf", "source": "openstack", "meter_id": "N2U0ZWZhMjAtYTg1Mi00OTk1LWI4ZjAtY2RiMTA0Y2FkY2FmK3ZvbHVtZQ==\n", "project_id": "313a8bc21b994e60b93d6fff7c1e0c1b", "type": "gauge", "unit": "volume"}]

+-------------+-------+--------+--------------------------------------+----------------------------------+----------------------------------+
| Name | Type | Unit | Resource ID | User ID | Project ID |
+-------------+-------+--------+--------------------------------------+----------------------------------+----------------------------------+
| volume | gauge | volume | 7e4efa20-a852-4995-b8f0-cdb104cadcaf | 30aee73695744a6096e35fdab25b6766 | 313a8bc21b994e60b93d6fff7c1e0c1b |
| volume.size | gauge | GB | 7e4efa20-a852-4995-b8f0-cdb104cadcaf | 30aee73695744a6096e35fdab25b6766 | 313a8bc21b994e60b93d6fff7c1e0c1b |
+-------------+-------+--------+--------------------------------------+----------------------------------+----------------------------------+

[ZhiQiang Fan (aji-zqfan)]

see: https://github.com/openstack/ceilometer/blob/master/ceilometer/api/controllers/v2.py#L857

        meter_id = base64.encodestring('%s+%s' % (kwargs['resource_id'],
                                                  kwargs['name']))
        kwargs['meter_id'] = meter_id
        super(Meter, self).__init__(**kwargs)

and here is a test:

    # python
    Python 2.7.3 (default, Sep 26 2013, 20:03:06)
    [GCC 4.6.3] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import base64
    >>> base64.encodestring('test')
    'dGVzdA==\n'
    >>>

so problem is base64.encodestring always return a string with a postfix '\n',
see: http://docs.python.org/2/library/base64.html#base64.encodestring

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/69333

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/220901

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/220901
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=c8f4e4bef6b633d7c42ac24ed1ef7926fa4d3ac0
Submitter: Jenkins
Branch: master

commit c8f4e4bef6b633d7c42ac24ed1ef7926fa4d3ac0
Author: liu-sheng <email address hidden>
Date: Mon Sep 7 15:37:03 2015 +0800

    Use b64encode to replace of encodestring

    The encodestring() method is used to encode a string, and return a string
    containing one or more lines of base64-encoded data. For meter_id, the
    return is same as b64encode() method except an extra trailing newline
    ('\n').

    Change-Id: Ia14747ff0b4c643b33ed99da7fa422480f0f8095
    Closes-Bug: #1271530