nipyapi 0.19.0

Nifi-Python-Api: A convenient Python wrapper for the Apache NiFi Rest API

NiPyApi

Nifi-Python-Api: A rich Apache NiFi Python Client SDK

Features

Three layers of Python support for working with Apache NiFi:

• High-level Demos and example scripts

• Mid-level Client SDK for typical complex tasks

• Low-level Client SDKs for the full API implementation of NiFi and selected sub-projects

Functionality Highlights:

• Detailed documentation of the full SDK at all levels

• CRUD wrappers for common task areas like Processor Groups, Processors, Templates, Registry Clients, Registry Buckets, Registry Flows, etc.

• Convenience functions for inventory tasks, such as recursively retrieving the entire canvas, or a flat list of all Process Groups

• Support for scheduling and purging flows, controller services, and connections

• Support for fetching and updating Variable Registries

• Support for import/export of Versioned Flows from NiFi-Registry

• Docker Compose configurations for testing and deployment

• A scripted deployment of an interactive environment, and a secured configuration, for testing and demonstration purposes

Please see the issue register for more information on current development.

Quick Start

There are several scripts to produce demo environments in nipyapi.demo.*

The mid-level functionality is in nipyapi.canvas / nipyapi.security / nipyapi.templates / nipyapi.versioning

You can access the entire API using the low-level SDKs in nipyapi.nifi / nipyapi.registry

The easiest way to install NiPyApi is with pip:

# in bash
pip install nipyapi

You can set the config for your endpoints in the central config file:

# in python
import nipyapi
nipyapi.config.nifi_config.host = 'http://localhost:8080/nifi-api'
nipyapi.config.registry_config.host = 'http://localhost:18080/nifi-registry-api'

Then import a module and execute tasks:

nipyapi.canvas.get_root_pg_id()
>'4d5dcf9a-015e-1000-097e-e505ed0f7fd2'

You can use the Docker demos to create a secured interactive console showing many features:

from nipyapi.demo.secured_console import *
from nipyapi.demo.console import *

You can also explore the scripts to get ideas for how NiPyAPi can be used to automate your environment.

Please check out the Contribution Guide if you are interested in contributing to the feature set.

Background and Documentation

For more information on Apache NiFi, please visit https://nifi.apache.org

For Documentation on this package please visit https://nipyapi.readthedocs.io.

NiFi Version Support

Currently we are testing against NiFi versions 1.1.2 - 1.15.0, and NiFi-Registry versions 0.1.0 - 1.15.0.

If you find a version compatibility problem please raise an issue

Python Requirements

Python 2.7 or 3.5-8 supported, though other versions may work. We will shortly stop supporting Python2

Tested on AL2 and OSX 10.14.x - Windows automated testing not attempted

Outside of the standard Python modules, we make use of lxml, DeepDiff, ruamel.yaml and xmltodict in processing, and Docker for demo/tests.

History

0.18.0 (2021-11-29)

Updated client for NiFi & Registry 1.15.0 release

• Moved testing to secured single user by default for NiFi

• Consolidated clients to the 1.15.0 release version for both NiFi and Registry

• Updated logic to support changed working modes in tests

• Corrected minor functional issues for 1.15 in login handling, SSL certs, Parameter Updates and Testing

• Backwards compatibility and Regression tested as requiring no breaking changes

0.17.1 (2021-10-21)

Added gzip as default request header (PR from rsaggino)

Update ruamel.yaml to 0.17.16

Update file read/write to explicitly handle encoding, default to UTF8, configurable in nipyapi.config

Linting and style changes to update to Python 3.9 standards, except where it would break backwards compatibility to Python 2.7

Test support for Amazon Linux 2, mostly better error handling for filesystem responses

0.17.0 (2021-10-13)

Updated NiFi version and client to 1.13.2

Updated NiFi-Registry version and client to 0.8.0

• Note that these are the last versions where NiFi and NiFi-Registry are separate codebases

0.16.3 (2021-10-11)

Removed force reset of configuration.password and configuration.username to empty string. This was not increasing security, and was causing unexpected errors for users connecting to multiple services in a single script.

Add greedy control to versioning.get_registry_bucket and versioning.get_flow_in_bucket to avoid undesirable partial string match.

• Update readme to reflect switch from ‘master’ branch naming to ‘main’.

• Update tox to pin testing to Python 3.8, as Python 3.9 is producing unexpected and unrelated SSL failures

• Minor lint formatting improvements

0.16.2 (2021-02-10)

NOTE: If you are using secured Registry, this release will enforce access controls for the swagger interface which is used to determine which version of Registry is connected in order to correctly provide features - you may have to update your authorizations

• Update requirements.txt to unpin future and lxml

• Update lxml to 4.6.2 or newer to resolve vulnerability

• Pin watchdog to <1.0.0 per their docs to maintain Python2.7 compatibility

• Revert 0.14.3 changes to Authentication handling which introduced basicAuth support but resulted in some NiFi connections appearing incorrectly as Anonymous

• Added simpler basicAuth control to force it via a config switch without changing tokenAuth and other Authorization header behavior during normal usage

• nipyapi.config.global_force_basic_auth is now available for use for this purpose

• Secured Registry users will now require the authorization policy to retrieve the swagger so we may use it to validate which version of

• Registry is in use for feature enablement

• Moved all Security controls in config.py to a common area at the foot of the file

• Removed auth_type from security.service_login as it is now redundant

• Added controls to handle certificate checking behavior which has become more strict in recently versions of Python3, ssl_verify and check_hostname are now handled

• security.set_service_auth_token now has an explicit flag for ssl host checking as well

• Fix oversight where improved model serialisation logic was not correctly applied to Registry

• Removed unusused parameter refresh from parameters.update_parameter_context

• Reduced unecessary complexity in utils.dump with no change in functionality

• Updated client gen mustache templates to reflect refactored security and api client code

• Minor linting and docstring and codestyle improvements

• Set pyUp to ignore Watchdog as it must stay between versions to statisfy py2 and py3 compatibility

• If Client is not instantiated, optimistically instantiate for version checking

• add socks proxy support

0.16.3 (2021-10-11)

Removed force reset of configuration.password and configuration.username to empty string. This was not increasing security, and was causing unexpected errors for users connecting to multiple services in a single script.

Add greedy control to versioning.get_registry_bucket and versioning.get_flow_in_bucket to avoid undesirable partial string match.

• Update readme to reflect switch from ‘master’ branch naming to ‘main’.

• Update tox to pin testing to Python 3.8, as Python 3.9 is producing unexpected and unrelated SSL failures

• Minor lint formatting improvements

0.16.2 (2021-02-10)

NOTE: If you are using secured Registry, this release will enforce access controls for the swagger interface which is used to determine which version of Registry is connected in order to correctly provide features - you may have to update your authorizations

• Update requirements.txt to unpin future and lxml

• Update lxml to 4.6.2 or newer to resolve vulnerability

• Pin watchdog to <1.0.0 per their docs to maintain Python2.7 compatibility

• Revert 0.14.3 changes to Authentication handling which introduced basicAuth support but resulted in some NiFi connections appearing incorrectly as Anonymous

• Added simpler basicAuth control to force it via a config switch without changing tokenAuth and other Authorization header behavior during normal usage

• nipyapi.config.global_force_basic_auth is now available for use for this purpose

• Secured Registry users will now require the authorization policy to retrieve the swagger so we may use it to validate which version of

• Registry is in use for feature enablement

• Moved all Security controls in config.py to a common area at the foot of the file

• Removed auth_type from security.service_login as it is now redundant

• Added controls to handle certificate checking behavior which has become more strict in recently versions of Python3, ssl_verify and check_hostname are now handled

• security.set_service_auth_token now has an explicit flag for ssl host checking as well

• Fix oversight where improved model serialisation logic was not correctly applied to Registry

• Removed unusused parameter refresh from parameters.update_parameter_context

• Reduced unecessary complexity in utils.dump with no change in functionality

• Updated client gen mustache templates to reflect refactored security and api client code

• Minor linting and docstring and codestyle improvements

• Set pyUp to ignore Watchdog as it must stay between versions to statisfy py2 and py3 compatibility

• If Client is not instantiated, optimistically instantiate for version checking

• add socks proxy support

0.15.0 (2020-11-06)

Updated NiFi client and helpers to 1.12.1, Registry client to 0.7.0

Release to include new fixes and features in baseline, work continues on improving different Authentication methods

• Added new Parameter contexts API to docs

• Resolved bug where funnel position did not honour requested location (thanks @geocali)

• Fixed issue where users expected exact search by default but some functions were silently using greedy search (thanks @razdob15)

• Change deploy_template to use floats for deployment instead of int (thanks @bgeisberger)

• Fixed creation of empty user groups (thanks @razdob15)

0.14.0 (2019-11-06)

Updated NiFi client and helpers to 1.10.0

0.13.3 (2019-10-09)

Updated NiFi-Registry client for 0.5.0

Several Issues closed as bugfixes

Many canvas operations sped-up through refactoring of recursive code to fast iterators

0.13.0 (2019-04-22)

Updated NiFi client for 1.9.1

Major rework of security.py to handle TLS and BasicAuth scenarios

Major rework for test_security.py to cover Issues and common use cases

Update ‘set_endpoint’ to easily handle TLS and BasicAuth scenarios if https is set

• Add default BasicAuth params to config

• Add default ‘safe chars’ to config for URL encoding bypass where ‘/’ is in a string

• Add ‘bypass_slash_encoding’ to utils.py to simplify conditionally allowing ‘/’ in a string

• Update Docker compose files for Secure and tox-full environments to latest NiFi versions

• Add global test controls to top of conftest for default, security, and regression test modes

• Add fixtures to conftest for user and usergroup testing in secure scenarios

• Update fixtures to better handle mixed secure and insecure test environments

0.12.0 (2018-12-20)

Updated NiFi client for 1.8.0

Updated NiFi-Registry client for 0.3.0

Added Controller Service Management (experimental)

Added Connections Management (experimental)

New Project Logo! Kindly provided by KDoran

Fixed several bugs around how the special root Process Group is handled when listing all Project Groups for various methods

• Various backwards compatibility improvements for handling calls going back to NiFi-1.1.2

• Various speedups for NiFi-1.7+ using descendants functionality to recurse the canvas

• Ability for various methods to specify a Process Group to use as the parent instead of always using root

• Better username/password handling in security.py and config.py

• Support for global ssl_verify squashing in config.py

• Added swagger for 1.8.0 to project resources against potential future validation requirements

• Added versioned deployment convenience functions for finding sensitive and invalid processors, should make it easier to update properties when importing to a new canvas

• Added summary options to several calls to return simple objects suitable for quick processing rather than full objects that need to be parsed

• Added utils.infer_object_label_from_class to make it easier to create connections between objects

• Updated compound methods like delete_process_group to also handle connections and controllers elegantly if requested

• Various codestyle and testing improvements

0.11.0 (2018-10-12)

Added steps to fdlc demo to show sensitive and invalid processor testing and behavior during deployment

Added list_sensitive_processors and list_invalid_processors to nipyapi.canvas

Added simple caching capability for certain calls to nipyapi.config

Added placeholder tests for new functionality against next refactoring and integration run

Missing assertion test in get_process_group_status

deprecated use of tests_require setup.py as current best-practice

Update ruamel.yaml to support Python 3.7 with passing tests

Added test for docker image already present to avoid excessive downloading

Added option to recurse from a given pg_id, rather than always from root, to several canvas functions

Added default verify_ssl and ssl error squashing to config for user convenience

Added filter option to specify whether exact or greedy matching should be used, still greedy by default

Added hard logout when changing endpoint to ensure tokens are refreshed

Updated tests

updating travis to build all branches

Fix travis for Python 3.7 testing support

Fix edge case in delete process group where templates stop the revision from being refreshed

Fixed test case to decode string correctly in old python versions

Fixed race condition in test where not all processors started before test executes

bugfix for missing status value in Processor DTO

Updating pylint to ignore import errors on standard packages

added logging to docker image control

Bump version: 0.10.3 → 0.11.0

Install requirements reset

0.10.3 (2018-08-28)

Minor bugfix for versioning/deploy_flow_version to resolve additional edge case for version number type

0.10.2 (2018-08-27)

BugFix for Issue #66 in security/get_access_policy_for_resource where NiFi Api is not expecting a resource_id to be submitted

0.10.1 (2018-08-21)

Minor bugfix for versioning/deploy_flow_version where version number should be a str instead of int

0.10.0 (2018-08-03)

Updated NiFi client for 1.7.1 release

Updated NiFi-Registry client for 0.2.0 release

Key Changes

• Reworked NiFi-Registry pytest setup to support multiple versions

• Changed schedule_processor to use component. rather than status. tests as they are more reliable

• Swtiched Docker configs to use explicit versions instead of latest for more consistent behavior across environents

Version Changes

• Deprecated testing against NiFi-1.5.0 due to host headers issue - recommend users to upgrade to at least NiFi-1.6.0

• Deprecated testing against NiFi-1.4.0 as superfluous

• Added testing for NiFi-1.7.1 and NiFi-Registry-0.2.0

0.9.1 (2018-05-18)

Updated Demos for 0.9 release

New Features

• Added a new demo for Flow Development LifeCycle which illustrates the steps a user might automate to promote Versioned Flows between NiFi environments

• Check out nipyapi.demo.fdlc to see more details

0.9.0 (2018-05-16)

Updated NiFi client to 1.6.0 release

Potentially Breaking Changes

Users should check the updated documentation and ensure their tests pass as expected

• Several NiFi client API calls were inconsistently CamelCase’d and have been renamed in the upstream NiFi release, I have honoured those changes in this release. If you use them please check your function names if you get an error

New Features

• Added functionality to Deploy a versioned flow to the canvas. This was an oversight from the 0.8.0 release. Function is creatively named ./versioning/deploy_flow_version

Other Notes

• Updated the Issue Template to also ask how urgent the problem is so we can priortise work

• Where possible we have switched to using the Apache maintained Docker containers rather than our own, there should be no impact to this unless you were relying on some edge part of our test compose files

0.8.0 (2018-03-06)

Introducing Secured environment support, vastly expanded Versioning support including import/export.

Fixed Templates, better documentation, more demos, and NiFi version backtesting.

Potentially Breaking Changes

Users should check the updated documentation and ensure their tests pass as expected

• Import/Export of Flow Versions was reworked significantly and renamed to correct bugs and remove coding complications and be generally more obvious in its behavior

• Template upload/download reworked significantly to remove direct reliance on requests and correct bugs in some environments

• Reworked many list/get functions to be more standardised as we stabilise the approaches to certain tasks. This should not change again in future

• Standardised bad user submission on AssertionError, bad API submission errors on ValueError, and general API errors on ApiException. This standard should flow forwards

• Switched ruamel.yaml from >15 to <15 as advised in the project documentation, as >15 is not considered production ready

Known Issues

• Python2 environments with older versions of openssl may run into errors like ‘SSLV3_ALERT_HANDSHAKE_FAILURE’ when working in secured environments. This is not a NiPyApi bug, it’s a problem with py2/openssl which is fixed by either upgrading openssl or moving to Python3 like you know you should

New Features

• Added support for working with secured NiFi environments, contributed by KevDoran

  • Added demo compatibility between secured_connection and console to produce a rich secured and version-controlled demo environment

  • Added many secured environment convenience functions to security.py

  • Integrated tokenAuth support throughout the low-level clients

• Added simple Docker deployment support in utils module for test, demo, and development

• Standardised all documentation on more readable docstrings and rst templates across the entire codebase

• Significantly expanded versioning support, users should consult the refreshed documentation

• Added experimental support for cleaning queues, process_groups, and setting scheduling of various components

• Many calls now have an auto-refresh before action option to simplify applying changes

• Implemented short and long wait controls for relevant functions to allow more deterministic changes

• Implemented generic object-list-filtering-for-a-string-in-a-field for many response get/list types

• Standardised many responses to conform to a common response contract: None for none, object for single, and list-of-objects for many

• Implemented import/export to json/yaml in versioning

• Added regression/backtesting for many functions going back through major release versions to NiFi-1.1.2. More details will be obvious from reading tests/conftest.py

• Test suites now more reliably clean up after themselves when executed on long-running environments

• Apparently logging is popular, so standard Python logging is now included

Other notes

• Various low-level SDK bugfixes corrected in the swagger spec and updated in the provided client

• Enhanced Template and Flow Versioning to handle significantly more complex flows

• Significantly enhanced testing fixtures

• Refactored several common functions to utils.py, and moved several common configurations to config.py

• versioning.get_flow will now export the raw Registry object for convenience when serialising flows

• Significantly improved Py2/Py3 compatibility handling, and import management within the package

• Removed docs dependency on M2R by converting everything over to reStructuredText

0.7.0 (2018-01-30)

• Updated project to support NiFi-1.5.0 and NiFi-Registry-0.1.0

• Merged api clients into main codebase, deprecated external client requirement

• Created centralised project configuration and test configuration

• Updated automated test environment to consistent docker for local and Travis

• Removed procedurally generated boilerplate stub tests to improve readability

• Moved pytest fixtures into conftest and expanded dramatically

• Added limited support for processor and process group scheduling

• Added support for all common Nifi-Registry calls

• Added a demo package to provide an interactive test and demo console

• Significant readme, contribution, and other documentation refresh

• Expanded CRUD support for most processor, process group and related tasks

0.6.1 (2018-01-04)

• Added requested functions to find and list Processors on the canvas

• Fixed list all process groups to include the root special case properly

0.6.0 (2017-12-31)

• Refactored many functions to use native NiFi datatypes instead of generics

• Standardised several call names for consistency

• Updated examples

• Created additional tests and enhanced existing to capture several exceptions

0.5.1 (2017-12-07)

• Added template import/export with working xml parsing and tests

• Added a ton of testing and validation steps

• Cleared many todos out of code by either implementing or moving to todo doc

0.5.0 (2017-12-06)

• migrated swagger_client to separate repo to allow independent versions

• refactored wrapper Classes to simpler functions instead

• cleaned up documentation and project administrivia to support the split

0.4.0 (2017-10-29)

• Added wrapper functions for many common Template commands (templates.py)

• Added new functions for common Process Groups commands (canvas.py)

• Significant test framework enhancements for wrapper functions

• Many coding style cleanups in preparation for filling out test suite

• Added linting

• Cleaned up docs layout and placement within project

• Integrated with TravisCI

• Dropped Python2.6 testing (wasn’t listed as supported anyway)

• Updated examples and Readme to be more informative

0.3.2 (2017-09-04)

• Fixed bug where tox failing locally due to coveralls expecting travis

• Fixed bug where TravisCI failing due to incorrectly set install requirements

• Fixed bug where swagger_client not importing as expected

0.3.1 (2017-09-04)

• Fixed imports and requirements for wheel install from PyPi

0.3.0 (2017-09-04)

• Created basic wrapper structure for future development

• Added simple usage functions to complete todo task

• Added devnotes, updated usage, and various sundry other documentation cleanups

• Split tests into subfolders for better management and clarity

• Added Coveralls and License Badge

• Removed broken venv that ended up in project directory, added similar to ignore file

• Changed default URL in the configuration to default docker url and port on localhost

0.2.1 (2017-08-26)

• Fixed up removal of leftover swagger client dependencies

0.2.0 (2017-08-25)

• Merge the nifi swagger client into this repo as a sub package

  • Restructured tests into package subfolders

  • Consolidate package configuration

  • Setup package import structure

  • Updated usage instructions

  • Integrate documentation

0.1.2 (2017-08-24)

• Created basic integration with nifi-python-swagger-client

0.1.1 (2017-08-24)

• Cleaned up base project and integrations ready for code migration

0.1.0 (2017-08-24)

• First release on PyPI.