Topology is a framework for building and testing network topologies, with support for pytest.
Framework for building and testing network topologies, with support for pytest.
https://topology.readthedocs.io/
.. code-block:: text
Copyright (C) 2015-2023 Hewlett Packard Enterprise Development LP
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Changes
- Add a step before build to resolve the topology graph. This additional step
allows the user to take decisions before trying to build the topology and
figuring out it is not possible too late.
- Add "platform" property so users can access the platform instance from the
topology manager.
1.18.3 (2024-06-25)
-------------------
Fix
~~~
- Move argparse type from 'int' to int.
In latest version of pytest, the 'int' value as type is
no longer supported, causing issues when topology is
started.
1.18.2 (2023-06-15)
-------------------
Fixes
~~~~~
- 'topology' executable was broken and could not be called. Fixed.
1.18.1 (2022-10-31)
-------------------
Fixes
~~~~~
- Using topology as module did not inject attributes appropriately. Now it uses
the topology file path as top search-path.
1.18.0 (2022-08-39)
-------------------
Changes
Add support for subnode. Subnodes can be specified using the node>subnode
syntax and they can be nested as well. Ports can be specified for any node
and links can be specified between any pair of nodes regardless the nesting
level, for example: node>subnode1>subnode2:p1 -- node:p1.
Replace NMLExtendedManager by a new TopologyGraph class and other classes for Node, Link and Port. TopologyGraph has the same API as the old NMLExtendedManager, thus backwards compatibility is preserved.
Drop support for NML and graphviz plot output which implies these pytest plugin flags and CLI arguments now do nothing. Notice they might be removed in a future release:
Changes
- pytest flag ``--topology-platform-options`` now uses the ExtendAction to
allowing extending and overriding options in CLI. [Francisco Mata]
1.16.0 (2021-05-11)
-------------------
New
~~~
- Add pytest option ``--topology-szn-dir``. [Jose Martinez]
This new option will allow to pass the path of a directory where topologies
files ``*.szn`` will be defined.
1.15.0 (2021-03-03)
-------------------
New
~~~
- Add pytest option ``--topology-build-retries``. [David Diaz]
Allow for unstable backends to try topology build more than once.
1.14.0 (2021-01-06)
-------------------
Changes
New
- Ignore the same paths pytest ignores. [David Diaz]
When running topology via the pytest plugin, ignore the same paths pytest
does by using norecursedirs ini option.
Also move topology plugin configuration to sessionstart as logs on pytest are
live only after that point.
1.12.0 (2020-06-05)
-------------------
Changes
Use realpath for pytest plugin search paths. [David Diaz]
Starting on pytest 3.9.2 pytest resolves symbolic links:
https://github.com/pytest-dev/pytest/pull/4108/
This causes an incompatibility with the attribute injection feature as the paths pytest sees (realpaths) differ from the injected_attr (abspath) found on the topology_plugin.
Changes
- Set a meaningful identifier for NML bilinks. [David Diaz]
Currently the bilinks ID is the Python instance ID, this commit set it to a
combination of the port IDs using the same syntax as pyszn:
``node0:port0 -- node1:port1``
1.10.0 (2020-01-28)
-------------------
New
~~~
- Platform arguments can now be passed from the CLI and/or the Pytest plugin.
Use ``--option key=value`` in the CLI and
``--topology-platform-option key=value`` in Pytest. Options given using
this method will be passed as keyword arguments to the platform. Values will
be "autoparsed" to a Python type using the following order: floats, integers,
booleans (yes, no, true, false, case insensitive) and finally any other is
considered a strings. [Carlos Jenkins & David Diaz]
1.9.15 (2019-11-18)
-------------------
Changes
Removed long ago deprecated module topology.platforms.base [Carlos Jenkins]
Change imports:
Update BaseShell call and execute to pass args and kwargs to the wrapped call to send_command() (#76) [Sergio Morales]
Changes to support newer versions of pytest. (#79) [Diego Dompe]
Drop support for Python 3.4. Minimal version is now 3.5. [Carlos Jenkins]
Fix
- Topology shells will now use pexpect poll() to support more than 1024 file
descriptors. This change requires pexpect >= 4.6. [Carlos Jenkins]
1.9.14 (2018-11-21)
-------------------
Changes
New
- Environment attributes are now passed to the NMLManager. [Javier
Peralta]
- Add functions for new test specific log. [Matthew Hall]
Changes
Remove unit test of functionalty no longer on topology. [Javier Peralta]
Moving injection to pyszn. [Diego Hurtado]
Customize term codes regex. [David Diaz]
Add the ability to customize the terminal regex code for special shells
Fix
- Pyszn uses correct depedency declaration. [Javier Peralta]
- Minor fixes. [David Diaz]
1.9.12 (2018-06-05)
-------------------
New
Add a dynamic timeout option. [Matthew Hall]
When this option is used expect will be repeated as long as output is still being returned.
Changes
- Add FORCED_PROMPT to the initial prompt. [Joseph Loaiza]
The original initial prompt does not match the FORCED_PROMPT, this makes the
shell to throw a timeout exception when trying to reconnect to a previously
used shell.
Fix
~~~
- Adding missing release information. [Diego Hurtado]
- Updating to new PEP8 requirements. [Diego Hurtado]
1.9.11 (2017-11-20)
-------------------
Changes
Modify pexpect logger to match actual data stream. [Javier Peralta]
This change adds a new filehandler that doesn't introduce line changes arbitrarily. Also Add some line changes on known places to keep output log file readable. With this changes the log file should match pexpect's command output stream closer.
Changes
- Extending connection and disconnection arguments. [Diego Hurtado]
Fix
~~~
- Refactoring _get_connection. [Diego Hurtado]
- Removing support for Python 2.7. [Diego Hurtado]
- Several fixes in the usage of the connection argument. [Diego Hurtado]
This intentionally breaks compatibility with Python 2.7 since it uses
syntax introduced in PEP 3102.
- Increase echo sleep 1 second. [Javier Peralta]
1.9.9 (2017-07-26)
------------------
New
~~~
- Adding support for sending control characters. [Diego Hurtado]
Fix
~~~
- Increased delay_after_echo_off a bit. [Javier Peralta]
1.9.8 (2017-06-13)
------------------
Changes
Fix
- Adding a delay after setting echo off. [Javier Peralta]
Command to set prompt was sometimes too fast and were sent before bash turned
off echo (stty -echo) resulting in unwanted information being displayed. This
commit makes sure bash always have time to turn echo off.
1.9.6 (2017-05-03)
------------------
New
platform_incompatible marker.Changes
- Adding workaround for bug in mock.
- Using ``python3`` as base Python.
1.9.5 (2017-01-06)
------------------
Fix
~~~
- Calling missing ``super``.
1.9.4 (2016-12-13)
------------------
Fix
~~~
- Fixing typo in README.
1.9.3 (2016-12-09)
------------------
Fix
~~~
- Making ``StepLogger`` backwards compatible.
1.9.2 (2016-12-01)
------------------
Fix
~~~
- Fixing broken ``step`` logger.
- Fixing the ``test_id`` marker to make it work with Pytest > 3.0.0.
1.9.1 (2016-11-23)
------------------
Fix
~~~
- Removing fixed dependencies.
1.9.0 (2016-11-10)
------------------
New
~~~
- Adding logging functionality.
Fix
~~~
- Fixing the shells connect process.
- Handling calls to ``decode`` safely.
1.8.1 (2016-09-22)
------------------
Fix
~~~
- Removed internal imports of deprecated modules.
1.8.0 (2016-08-26)
------------------
New
~~~
- A new ServicesAPI for the nodes is now available. This new API allows to
register and later on fetch information about the services a node provides.
- Greatly improved documentation for the Shell Low Level API introduced in
1.4.0. Check "The low-level shell API" in User Guide.
- The Low Level Shell API will now be able to log user commands. This new
feature is backward compatible.
Changes
Module topology.platforms.base is now deprecated. Please change your
imports to:
::
topology.platforms.base.BasePlatform => topology.platforms.platform.BasePlatform
topology.platforms.base.BaseNode => topology.platforms.node.BaseNode
topology.platforms.base.CommonNode => topology.platforms.node.CommonNode
Changes
- Adding ``user`` as an option for ``PExpectShell`` to support shells that use
this kind of authentication.
Fix
~~~
- Raising the proper exception when a shell connection fails for the user to
handle it properly.
1.7.1 (2016-05-26)
------------------
Changes
New
- The reference documentation for the *vtysh*, *ping* and *ip* communication
libraries has been added to the documentation.
- PExpect shells now support multiple connections. This means that the same
shell object can now use several ``pexpect`` ``spawn`` objects.
Changes
pexpect spawn arguments are now reachable from the initialization
of a shell object.Fix
- The base node class ``BaseNode`` now includes a ``ports`` attribute. This has
been used by all platform engine nodes so far, but was missing in their base
class.
- A missing history file does not raise an error whene executing ``topology``,
but is just logged as an error.
- A few CSS and other theme issues have been fixed.
1.6.0 (2016-03-21)
------------------
Changes
.py's that doesn't possess a TOPOLOGY variable will now be warned
and skipped instead of raising an exception.Fix
- Fixed attribute injection crashing when a SZN file is in the node expansion
search path.
- Fixed rollback routine not being triggered when an non ``Exception`` subclass
is raised.
1.5.0 (2016-03-02)
------------------
New
topology.platforms.shell.PExpectBashShell class that allows to easily
setup shells that uses bash.Fix
- Fixed small identation bug that caused the function ``get_shell()`` in the
node API to return always ``None``.
1.4.0 (2016-03-01)
------------------
New
New low level shell API that allows to define a common behavior for all low
level shell manipulation. This API is implemented by the
topology.platforms.shell module.
Two new high level API methods for accesing the low level shell API::
myshell = mynode.get_shell('python')
response = myshell.execute('1 + 1')
Or using a context manager::
with mynode.use_shell('python') as python:
# This context manager sets the default shell to 'python'
mynode('from os import getcwd')
cwd = mynode('print(getcwd())')
# Access to the low-level shell API
python.send_command('foo = (', matches=['... '])
Changes
- The shell used to execute a command will now be logged.
1.3.0 (2016-02-17)
------------------
Changes
Fix
- Fixed critical bug in injection attribute not considering matches in some
cases.
1.2.0 (2016-02-13)
------------------
New
mynode.default_shell = 'bash'.Fix
- Fixed a bug in attribute injection when using ``attribute=value`` as node
identifier that caused all nodes with the attribute to use that value.
1.1.0 (2016-01-26)
------------------
New
stateprovider decorator to topology.libraries.utils
that allows to easily inject state to an enode in a Communication library.NodeLoader class to topology.platforms.utils that
allows a Platform Engine to find a load nodes for it's platform.Fix
- Fixed fatal bug when running a single node topology without ports.
- Fixed new PEP8 checks on the codebase.
1.0.0 (2016-01-05)
------------------
New
FAQs
Topology is a framework for building and testing network topologies, with support for pytest.
We found that topology demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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