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[doc] Follow-up logging service for firewall_group

This patch updates the networking guide to include 'firewall_group'
as a new resource-type in 'Neutron Packet Logging Framework'

Change-Id: I94d779fcabc64417d4d561c659270501c0651a66
Co-Authored-By: Nguyen Phuong An <AnNP@vn.fujitsu.com>
Partial-Bug: #1720727
tags/13.0.0.0rc1
Kim Bao Long 2 years ago
parent
commit
e82a17527d
2 changed files with 323 additions and 244 deletions
  1. +323
    -244
      doc/source/admin/config-logging.rst
  2. BIN
      doc/source/admin/figures/logging-framework.png

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doc/source/admin/config-logging.rst View File

@@ -1,244 +1,323 @@
.. _config-logging:

===========================
Logging for security groups
===========================

Logging is designed as a service plug-in that captures events for
relevant resources (for example, security groups or firewalls) when they occur.


Supported logging resource types
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

As of the Queens release, the ``security_group`` resource type is supported.


Configuration
~~~~~~~~~~~~~

To enable the service, follow the steps below.

#. On Neutron server node:

#. Add the Logging service to the ``service_plugins`` setting in
``/etc/neutron/neutron.conf``. For example:

.. code-block:: none

service_plugins = router,metering,log

#. Add the Logging extension to the ``extensions`` setting in
``/etc/neutron/plugins/ml2/ml2_conf.ini``. For example:

.. code-block:: ini

[agent]
extensions = log

#. On compute/network nodes:

#. In ``/etc/neutron/plugins/ml2/openvswitch_agent.ini``, add ``log``
to the ``extensions`` setting in the ``[agent]`` section. For example:

.. code-block:: ini

[agent]
extensions = log

#. In ``/etc/neutron/plugins/ml2/openvswitch_agent.ini``, add configuration
options for logging feature in the ``[network_log]`` section. For example:

.. code-block:: ini

[network_log]
rate_limit = 100
burst_limit = 25
#local_output_log_base = <None>

In which, ``rate_limit`` is used to configure the maximum number of packets
to be logged per second (packets per second). When a high rate triggers
``rate_limit``, logging queues packets to be logged. ``burst_limit`` is used
to configure the maximum of queued packets. And logged data can be stored
anywhere by using ``local_output_log_base``.

.. note::

- Logging currently works with ``openvswitch`` firewall driver only.
- It requires at least 100 for ``rate_limit`` and at least 25 for ``burst_limit``.
- If ``rate_limit`` is unset, logging will log unlimited.
- If we don't specify ``local_output_log_base``, logged data will be stored
in system journal like ``/var/log/syslog``.

Trusted projects policy.json configuration
------------------------------------------

With the default ``/etc/neutron/policy.json``, administrators must
set up resource logging on behalf of the cloud projects.

If projects are trusted to administer their own resource logging in your cloud,
neutron's file ``policy.json`` can be modified to allow this.

Modify ``/etc/neutron/policy.json`` policy entries as follows:

.. code-block:: none

"get_loggable_resources": "rule:regular_user",
"create_log": "rule:regular_user",
"update_log": "rule:regular_user",
"delete_log": "rule:regular_user",
"get_logs": "rule:regular_user",
"get_log": "rule:regular_user",

Operator workflow
~~~~~~~~~~~~~~~~~

#. Confirm logging resources are supported:

.. code-block:: console

$ openstack network loggable resources list
+-----------------+
| Supported types |
+-----------------+
| security_group |
+-----------------+

#. Create a logging resource with an appropriate resource type:

.. code-block:: console

$ openstack network log create --resource-type security_group \
--description "Collecting all security events in project demo" \
--enable --event ALL Log_Created
+-----------------+------------------------------------------------+
| Field | Value |
+-----------------+------------------------------------------------+
| Description | Collecting all security events in project demo |
| Enabled | True |
| Event | ALL |
| ID | 8085c3e6-0fa2-4954-b5ce-ff6207931b6d |
| Name | Log_Created |
| Project | 02568bd62b414221956f15dbe9527d16 |
| Resource | None |
| Target | None |
| Type | security_group |
| created_at | 2017-07-05T02:56:43Z |
| revision_number | 0 |
| tenant_id | 02568bd62b414221956f15dbe9527d16 |
| updated_at | 2017-07-05T02:56:43Z |
+-----------------+------------------------------------------------+

.. note::

The ``Enabled`` field is set to ``True`` by default. If enabled,
log information is written to the destination if configured in
``local_output_log_base`` or system journal like ``/var/log/syslog``.


Enable/Disable log
------------------

We can enable or disable logging objects at runtime. It means that it will
apply to all attached ports with the logging object immediately.

For example:

.. code-block:: console

$ openstack network log set --disable Log_Created
$ openstack network log show Log_Created
+-----------------+------------------------------------------------+
| Field | Value |
+-----------------+------------------------------------------------+
| Description | Collecting all security events in project demo |
| Enabled | False |
| Event | ALL |
| ID | 8085c3e6-0fa2-4954-b5ce-ff6207931b6d |
| Name | Log_Created |
| Project | 02568bd62b414221956f15dbe9527d16 |
| Resource | None |
| Target | None |
| Type | security_group |
| created_at | 2017-07-05T02:56:43Z |
| revision_number | 1 |
| tenant_id | 02568bd62b414221956f15dbe9527d16 |
| updated_at | 2017-07-05T03:12:01Z |
+-----------------+------------------------------------------------+


Events collected description
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Logging will collect ``ACCEPT`` or ``DROP`` or both events related to security group,
with the following general characteristics:

* Log every ``DROP`` event: Every ``DROP`` security event will be generated when
an incoming or outgoing session is dropped, that is the new session is not
allowed for the security group and because of that blocked.

* Log an ``ACCEPT`` event: An ``ACCEPT`` security event will be generated for each
**NEW** incoming or outgoing session that is allowed by the ports security group.
More details for the events follow below:

* North/South ``ACCEPT``: For a North/South session there would be a single ``ACCEPT``
event irrespective of direction.

* East/West ``ACCEPT``/``ACCEPT``: In an intra-project East/West session where the
security group on the originating port allows the session and the security
group on the destination port allows the session, i.e. the traffic is allowed,
there would be two ``ACCEPT`` security events generated, one from the perspective
of the originating port and one from the perspective of the destination port.

* East/West ``ACCEPT``/``DROP``: In an intra-project East/West session initiation
where the security group on the originating port allows the session and the
security group on the destination port does not allow the session there would
be ``ACCEPT`` security events generated from the perspective of the originating
port and ``DROP`` security events generated from the perspective of the
destination port.

General data requirements: The security event should include:

* A status of the flow ``ACCEPT``/``DROP``.
* An indication of the originator of the flow, e.g which project or log resource
generated the event.
* A timestamp of the flow.
* An identifier of the associated instance interface (neutron port id).
* An identifier of the matching security group rule.
* A layer 3 and 4 information (address, port, protocol, etc).

.. note::

No other extraneous events are generated within the security event logs,
e.g. no debugging data, etc.

* Security event record format:

* Logged data of an ``ACCEPT`` event would look like:

.. code-block:: console

May 5 09:05:07 action=ACCEPT project_id=736672c700cd43e1bd321aeaf940365c
log_resource_ids=['4522efdf-8d44-4e19-b237-64cafc49469b', '42332d89-df42-4588-a2bb-3ce50829ac51']
vm_port=e0259ade-86de-482e-a717-f58258f7173f
ethernet(dst='fa:16:3e:ec:36:32',ethertype=2048,src='fa:16:3e:50:aa:b5'),
ipv4(csum=62071,dst='10.0.0.4',flags=2,header_length=5,identification=36638,offset=0,
option=None,proto=6,src='172.24.4.10',tos=0,total_length=60,ttl=63,version=4),
tcp(ack=0,bits=2,csum=15097,dst_port=80,offset=10,option=[TCPOptionMaximumSegmentSize(kind=2,length=4,max_seg_size=1460),
TCPOptionSACKPermitted(kind=4,length=2), TCPOptionTimestamps(kind=8,length=10,ts_ecr=0,ts_val=196418896),
TCPOptionNoOperation(kind=1,length=1), TCPOptionWindowScale(kind=3,length=3,shift_cnt=3)],
seq=3284890090,src_port=47825,urgent=0,window_size=14600)

* Logged data of a ``DROP`` event:

.. code-block:: console

May 5 09:05:07 action=DROP project_id=736672c700cd43e1bd321aeaf940365c
log_resource_ids=['4522efdf-8d44-4e19-b237-64cafc49469b'] vm_port=e0259ade-86de-482e-a717-f58258f7173f
ethernet(dst='fa:16:3e:ec:36:32',ethertype=2048,src='fa:16:3e:50:aa:b5'),
ipv4(csum=62071,dst='10.0.0.4',flags=2,header_length=5,identification=36638,offset=0,
option=None,proto=6,src='172.24.4.10',tos=0,total_length=60,ttl=63,version=4),
tcp(ack=0,bits=2,csum=15097,dst_port=80,offset=10,option=[TCPOptionMaximumSegmentSize(kind=2,length=4,max_seg_size=1460),
TCPOptionSACKPermitted(kind=4,length=2), TCPOptionTimestamps(kind=8,length=10,ts_ecr=0,ts_val=196418896),
TCPOptionNoOperation(kind=1,length=1), TCPOptionWindowScale(kind=3,length=3,shift_cnt=3)],
seq=3284890090,src_port=47825,urgent=0,window_size=14600)
.. _config-logging:
================================
Neutron Packet Logging Framework
================================
Packet logging service is designed as a Neutron plug-in that captures network
packets for relevant resources (e.g. security group or firewall group) when the
registered events occur.
.. image:: figures/logging-framework.png
:width: 100%
:alt: Packet Logging Framework
Supported loggable resource types
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
From Rocky release, both of ``security_group`` and ``firewall_group`` are
supported as resource types in Neutron packet logging framework.
Service Configuration
~~~~~~~~~~~~~~~~~~~~~
To enable the logging service, follow the below steps.
#. On Neutron controller node, add ``log`` to ``service_plugins`` setting in
``/etc/neutron/neutron.conf`` file. For example:
.. code-block:: none
service_plugins = router,metering,log
#. To enable logging service for ``security_group`` in Layer 2, add ``log`` to
option ``extensions`` in section ``[agent]`` in ``/etc/neutron/plugins/ml2/ml2_conf.ini``
for controller node and in ``/etc/neutron/plugins/ml2/openvswitch_agent.ini``
for compute/network nodes. For example:
.. code-block:: ini
[agent]
extensions = log
#. To enable logging service for ``firewall_group`` in Layer 3, add
``fwaas_v2_log`` to option ``extensions`` in section ``[AGENT]`` in
``/etc/neutron/l3_agent.ini`` for network nodes. For example:
.. code-block:: ini
[AGENT]
extensions = fwaas_v2,fwaas_v2_log
#. On compute/network nodes, add configuration for logging service to
``[network_log]`` in ``/etc/neutron/plugins/ml2/openvswitch_agent.ini`` as
shown bellow:
.. code-block:: ini
[network_log]
rate_limit = 100
burst_limit = 25
#local_output_log_base = <None>
In which, ``rate_limit`` is used to configure the maximum number of packets
to be logged per second (packets per second). When a high rate triggers
``rate_limit``, logging queues packets to be logged. ``burst_limit`` is
used to configure the maximum of queued packets. And logged packets can be
stored anywhere by using ``local_output_log_base``.
.. note::
- It requires at least ``100`` for ``rate_limit`` and at least ``25``
for ``burst_limit``.
- If ``rate_limit`` is unset, logging will log unlimited.
- If we don't specify ``local_output_log_base``, logged packets will be
stored in system journal like ``/var/log/syslog`` by default.
Trusted projects policy.json configuration
----------------------------------------------
With the default ``/etc/neutron/policy.json``, administrators must set up
resource logging on behalf of the cloud projects.
If projects are trusted to administer their own loggable resources in their
cloud, neutron's policy file ``policy.json`` can be modified to allow this.
Modify ``/etc/neutron/policy.json`` entries as follows:
.. code-block:: none
"get_loggable_resources": "rule:regular_user",
"create_log": "rule:regular_user",
"get_log": "rule:regular_user",
"get_logs": "rule:regular_user",
"update_log": "rule:regular_user",
"delete_log": "rule:regular_user",
Service workflow for Operator
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#. To check the loggable resources that are supported by framework:
.. code-block:: console
$ openstack network loggable resources list
+-----------------+
| Supported types |
+-----------------+
| security_group |
| firewall_group |
+-----------------+
.. note::
- In VM ports, logging for ``security_group`` in currently works with
``openvswitch`` firewall driver only. ``linuxbridge`` is under
development.
- Logging for ``firewall_group`` works on internal router ports only. VM
ports would be supported in the future.
#. Log creation:
* Create a logging resource with an appropriate resource type
.. code-block:: console
$ openstack network log create --resource-type security_group \
--description "Collecting all security events" \
--event ALL Log_Created
+-----------------+------------------------------------------------+
| Field | Value |
+-----------------+------------------------------------------------+
| Description | Collecting all security events |
| Enabled | True |
| Event | ALL |
| ID | 8085c3e6-0fa2-4954-b5ce-ff6207931b6d |
| Name | Log_Created |
| Project | 02568bd62b414221956f15dbe9527d16 |
| Resource | None |
| Target | None |
| Type | security_group |
| created_at | 2017-07-05T02:56:43Z |
| revision_number | 0 |
| tenant_id | 02568bd62b414221956f15dbe9527d16 |
| updated_at | 2017-07-05T02:56:43Z |
+-----------------+------------------------------------------------+
.. warning::
In the case of ``--resource`` and ``--target`` are not specified from the
request, these arguments will be assigned to ``ALL`` by default. Hence,
there is an enormous range of log events will be created.
* Create logging resource with a given resource (sg1 or fwg1)
.. code-block:: console
$ openstack network log create my-log --resource-type security_group --resource sg1
$ openstack network log create my-log --resource-type firewall_group --resource fwg1
* Create logging resource with a given target (portA)
.. code-block:: console
$ openstack network log create my-log --resource-type security_group --target portA
* Create logging resource for only the given target (portB) and the given
resource (sg1 or fwg1)
.. code-block:: console
$ openstack network log create my-log --resource-type security_group --target portB --resource sg1
$ openstack network log create my-log --resource-type firewall_group --target portB --resource fwg1
.. note::
- The ``Enabled`` field is set to ``True`` by default. If enabled, logged
events are written to the destination if ``local_output_log_base`` is
configured or ``/var/log/syslog`` in default.
- The ``Event`` field will be set to ``ALL`` if ``--event`` is not specified
from log creation request.
#. Enable/Disable log
We can ``enable`` or ``disable`` logging objects at runtime. It means that
it will apply to all registered ports with the logging object immediately.
For example:
.. code-block:: console
$ openstack network log set --disable Log_Created
$ openstack network log show Log_Created
+-----------------+------------------------------------------------+
| Field | Value |
+-----------------+------------------------------------------------+
| Description | Collecting all security events |
| Enabled | False |
| Event | ALL |
| ID | 8085c3e6-0fa2-4954-b5ce-ff6207931b6d |
| Name | Log_Created |
| Project | 02568bd62b414221956f15dbe9527d16 |
| Resource | None |
| Target | None |
| Type | security_group |
| created_at | 2017-07-05T02:56:43Z |
| revision_number | 1 |
| tenant_id | 02568bd62b414221956f15dbe9527d16 |
| updated_at | 2017-07-05T03:12:01Z |
+-----------------+------------------------------------------------+
Logged events description
~~~~~~~~~~~~~~~~~~~~~~~~~
Currently, packet logging framework supports to collect ``ACCEPT`` or ``DROP``
or both events related to registered resources. As mentioned above, Neutron
packet logging framework offers two loggable resources through the ``log``
service plug-in: ``security_group`` and ``firewall_group``.
The general characteristics of each event will be shown as the following:
* Log every ``DROP`` event: Every ``DROP`` security events will be generated
when an incoming or outgoing session is blocked by the security groups or
firewall groups
* Log an ``ACCEPT`` event: The ``ACCEPT`` security event will be generated only
for each ``NEW`` incoming or outgoing session that is allowed by security
groups or firewall groups. More details for the ``ACCEPT`` events are shown
as bellow:
* North/South ``ACCEPT``: For a North/South session there would be a single
``ACCEPT`` event irrespective of direction.
* East/West ``ACCEPT``/``ACCEPT``: In an intra-project East/West session
where the originating port allows the session and the destination port
allows the session, i.e. the traffic is allowed, there would be two
``ACCEPT`` security events generated, one from the perspective of the
originating port and one from the perspective of the destination port.
* East/West ``ACCEPT``/``DROP``: In an intra-project East/West session
initiation where the originating port allows the session and the
destination port does not allow the session there would be ``ACCEPT``
security events generated from the perspective of the originating port and
``DROP`` security events generated from the perspective of the destination
port.
#. The security events that are collected by security group should include:
* A timestamp of the flow.
* A status of the flow ``ACCEPT``/``DROP``.
* An indication of the originator of the flow, e.g which project or log resource
generated the events.
* An identifier of the associated instance interface (neutron port id).
* A layer 2, 3 and 4 information (mac, address, port, protocol, etc).
* Security event record format:
* Logged data of an ``ACCEPT`` event would look like:
.. code-block:: console
May 5 09:05:07 action=ACCEPT project_id=736672c700cd43e1bd321aeaf940365c
log_resource_ids=['4522efdf-8d44-4e19-b237-64cafc49469b', '42332d89-df42-4588-a2bb-3ce50829ac51']
vm_port=e0259ade-86de-482e-a717-f58258f7173f
ethernet(dst='fa:16:3e:ec:36:32',ethertype=2048,src='fa:16:3e:50:aa:b5'),
ipv4(csum=62071,dst='10.0.0.4',flags=2,header_length=5,identification=36638,offset=0,
option=None,proto=6,src='172.24.4.10',tos=0,total_length=60,ttl=63,version=4),
tcp(ack=0,bits=2,csum=15097,dst_port=80,offset=10,option=[TCPOptionMaximumSegmentSize(kind=2,length=4,max_seg_size=1460),
TCPOptionSACKPermitted(kind=4,length=2), TCPOptionTimestamps(kind=8,length=10,ts_ecr=0,ts_val=196418896),
TCPOptionNoOperation(kind=1,length=1), TCPOptionWindowScale(kind=3,length=3,shift_cnt=3)],
seq=3284890090,src_port=47825,urgent=0,window_size=14600)
* Logged data of a ``DROP`` event:
.. code-block:: console
May 5 09:05:07 action=DROP project_id=736672c700cd43e1bd321aeaf940365c
log_resource_ids=['4522efdf-8d44-4e19-b237-64cafc49469b'] vm_port=e0259ade-86de-482e-a717-f58258f7173f
ethernet(dst='fa:16:3e:ec:36:32',ethertype=2048,src='fa:16:3e:50:aa:b5'),
ipv4(csum=62071,dst='10.0.0.4',flags=2,header_length=5,identification=36638,offset=0,
option=None,proto=6,src='172.24.4.10',tos=0,total_length=60,ttl=63,version=4),
tcp(ack=0,bits=2,csum=15097,dst_port=80,offset=10,option=[TCPOptionMaximumSegmentSize(kind=2,length=4,max_seg_size=1460),
TCPOptionSACKPermitted(kind=4,length=2), TCPOptionTimestamps(kind=8,length=10,ts_ecr=0,ts_val=196418896),
TCPOptionNoOperation(kind=1,length=1), TCPOptionWindowScale(kind=3,length=3,shift_cnt=3)],
seq=3284890090,src_port=47825,urgent=0,window_size=14600)
#. The events that are collected by firewall group should include:
* A timestamp of the flow.
* A status of the flow ``ACCEPT``/``DROP``.
* The identifier of log objects that are collecting this event
* An identifier of the associated instance interface (neutron port id).
* A layer 2, 3 and 4 information (mac, address, port, protocol, etc).
* Security event record format:
* Logged data of an ``ACCEPT`` event would look like:
.. code-block:: console
Jul 26 14:46:20:
action=ACCEPT, log_resource_ids=[u'2e030f3a-e93d-4a76-bc60-1d11c0f6561b'], port=9882c485-b808-4a34-a3fb-b537642c66b2
pkt=ethernet(dst='fa:16:3e:8f:47:c5',ethertype=2048,src='fa:16:3e:1b:3e:67')
ipv4(csum=47423,dst='10.10.1.16',flags=2,header_length=5,identification=27969,offset=0,option=None,proto=1,src='10.10.0.5',tos=0,total_length=84,ttl=63,version=4)
icmp(code=0,csum=41376,data=echo(data='\xe5\xf2\xfej\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x00\x00\x00\x00\x00',id=29185,seq=0),type=8)
* Logged data of a ``DROP`` event:
.. code-block:: console
Jul 26 14:51:20:
action=DROP, log_resource_ids=[u'2e030f3a-e93d-4a76-bc60-1d11c0f6561b'], port=9882c485-b808-4a34-a3fb-b537642c66b2
pkt=ethernet(dst='fa:16:3e:32:7d:ff',ethertype=2048,src='fa:16:3e:28:83:51')
ipv4(csum=17518,dst='10.10.0.5',flags=2,header_length=5,identification=57874,offset=0,option=None,proto=1,src='10.10.1.16',tos=0,total_length=84,ttl=63,version=4)
icmp(code=0,csum=23772,data=echo(data='\x8a\xa0\xac|\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x00\x00\x00\x00\x00',id=25601,seq=5),type=8)
.. note::
No other extraneous events are generated within the security event logs,
e.g. no debugging data, etc.

BIN
doc/source/admin/figures/logging-framework.png View File

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