Neutron的context攜帶哪些數據

(一) 從代碼看，攜帶以下信息：

安全上下文，請求信息；用來表示“正在執行一定動作的用戶”

 還包含db session

從類定義看所攜帶具體信息：

class ContextBase(common_context.RequestContext):
    ...
    def to_dict(self):
        return {'user_id': self.user_id,
                'tenant_id': self.tenant_id,
                'project_id': self.project_id,
                'is_admin': self.is_admin,
                'read_deleted': self.read_deleted,
                'roles': self.roles,
                'timestamp': str(self.timestamp),
                'request_id': self.request_id,
                'tenant': self.tenant,
                'user': self.user,
                'tenant_name': self.tenant_name,
                'project_name': self.tenant_name,
                'user_name': self.user_name,
                }
      ...

class Context(ContextBase):
    @property
    def session(self):
        if self._session is None:
            self._session = db_api.get_session()
        return self._session

(二) Neutron在哪裏用context

所有neutron API，如create_network

    def create_network(self, context, network):

(三) 抓一下context對象

1. 添加LOG

/opt/stack/neutron/neutron/plugins/ml2/plugin.py

     def create_network(self, context, network):
         LOG.info(_("**debug** %s, %s"), context.to_dict(), network)

2. devstack環境中，停掉neutron-server

$ ps -eLf | grep neutron-server
bengo     7884  2672  7884  0    1 18:35 pts/0    00:00:00 grep --color=auto neutron-server
bengo    10246  2672 10246  0    1 17:04 pts/0    00:00:21 python /usr/local/bin/neutron-server --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini

$ sudo kill $pid

3. devstack中爲配置log，配置/etc/neutron/neuron.conf

debug = False
use_stderr = False
log_file = server.log
log_dir = /var/log/neutron

4. 啓動neutron-server

$ python /usr/local/bin/neutron-server --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini &

5. 在neutron-client創建network

$ neutron net-create test-04

log文件中：

2014-01-17 17:04:55.702 INFO neutron.plugins.ml2.plugin [req-87d27c81-c30c-43ea-baa1-dead845e9a2a demo e70c0a66ca274efc9ca32a5d0532c298] **debug** {'project_name': u'demo', 'tenant_name': u'demo', 'timestamp': '2014-01-17 09:04:55.614450', 'is_admin': False, 'user': u'bcfca75777ed447297dee807677ee99e', 'tenant': u'e70c0a66ca274efc9ca32a5d0532c298', 'user_id': u'bcfca75777ed447297dee807677ee99e', 'roles': [u'anotherrole', u'Member'], 'tenant_id': u'e70c0a66ca274efc9ca32a5d0532c298', 'read_deleted': 'no', 'request_id': 'req-87d27c81-c30c-43ea-baa1-dead845e9a2a', 'project_id': u'e70c0a66ca274efc9ca32a5d0532c298', 'user_name': u'demo'}, {u'network': {'router:external': <object object at 0x7f7d81508140>, u'name': u'test-04', 'provider:physical_network': <object object at 0x7f7d81508140>, u'admin_state_up': True, 'tenant_id': u'e70c0a66ca274efc9ca32a5d0532c298', 'segments': <object object at 0x7f7d81508140>, 'provider:network_type': <object object at 0x7f7d81508140>, 'shared': False, 'provider:segmentation_id': <object object at 0x7f7d81508140>}}

6. 解析、整形

(1)  import json

       json.dumps(xxx)

(2)  用 $ echo ‘xxx’ | python -mjson.tool解析

context：

{
    "is_admin": false, 
    "project_id": "e70c0a66ca274efc9ca32a5d0532c298", 
    "project_name": "demo", 
    "read_deleted": "no", 
    "request_id": "req-5e88df50-e4ef-4ee2-be09-ee7d9ce25236", 
    "roles": [
        "anotherrole", 
        "Member"
    ], 
    "tenant": "e70c0a66ca274efc9ca32a5d0532c298", 
    "tenant_id": "e70c0a66ca274efc9ca32a5d0532c298", 
    "tenant_name": "demo", 
    "timestamp": "2014-01-18 01:20:38.758066", 
    "user": "bcfca75777ed447297dee807677ee99e", 
    "user_id": "bcfca75777ed447297dee807677ee99e", 
    "user_name": "demo"
}