176 lines
6.2 KiB
Markdown
176 lines
6.2 KiB
Markdown
# Clixon
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Clixon is an automatic configuration manager where you generate
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interactive CLI, NETCONF, RESTCONF and embedded databases with
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transaction support from a YANG specification.
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* [Background](#background)
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* [Frequently asked questions](doc/FAQ.md)
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* [Installation](#installation)
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* [Licenses](#licenses)
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* [Support](#support)
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* [Dependencies](#dependencies)
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* [Extending](#extending)
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* [Yang](#yang)
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* [Netconf](#netconf)
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* [Restconf](#restconf)
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* [Datastore](datastore/README.md)
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* [Authentication and Authorization](#auth)
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* [Example](example/)
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* [Changelog](CHANGELOG.md)
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* [Runtime](#runtime)
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* [Clicon and Clixon project page](http://www.clicon.org)
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* [Tests](test/)
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* [Reference manual](http://www.clicon.org/doxygen/index.html) (Note: the link may not be up-to-date. It is better to build your own: `cd doc; make doc`)
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Background
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==========
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Clixon was implemented to provide an open-source generic configuration
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tool. The existing [CLIgen](http://www.cligen.se) tool was extended to
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a framework. Most of the user projects are for embedded network and
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measuring devices, but can be deployed for more general use.
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Users of clixon currently include:
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* [Netgate](https://www.netgate.com)
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* [CloudMon360](http://cloudmon360.com)
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* [Grideye](http://hagsand.se/grideye)
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* [Netclean](https://www.netclean.com/solutions/whitebox) # only CLIgen
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* [Prosilient's PTAnalyzer](https://prosilient.com) # only CLIgen
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See also [Clicon project page](http://clicon.org).
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Installation
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============
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A typical installation is as follows:
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```
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configure # Configure clixon to platform
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make # Compile
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sudo make install # Install libs, binaries, and config-files
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sudo make install-include # Install include files (for compiling)
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```
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One [example application](example/README.md) is provided, a IETF IP YANG datamodel with
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generated CLI and configuration interface.
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Licenses
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========
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Clixon is open-source and dual licensed. Either Apache License, Version 2.0 or GNU
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General Public License Version 2; you choose.
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See [LICENSE.md](LICENSE.md) for the license.
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Dependencies
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============
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Clixon depends on the following software packages, which need to exist on the target machine.
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- [CLIgen](http://www.cligen.se) is required for building Clixon. If you need
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to build and install CLIgen:
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```
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git clone https://github.com/olofhagsand/cligen.git
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cd cligen; configure; make; make install
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```
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- Yacc/bison
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- Lex/Flex
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- Fcgi (if restconf is enabled)
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There is no yum/apt/ostree package for Clixon (please help?)
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Support
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=======
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Clixon interaction is best done posting issues, pull requests, or joining the [slack channel](https://join.slack.com/t/clixondev/shared_invite/enQtMzI3OTM4MzA3Nzk3LTA3NWM4OWYwYWMxZDhiYTNhNjRkNjQ1NWI1Zjk5M2JjMDk4MTUzMTljYTZiYmNhODkwMDI2ZTkyNWU3ZWMyN2U).
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Extending
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=========
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Clixon provides a core system and can be used as-is using available
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Yang specifications. However, an application very quickly needs to
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specialize functions. Clixon is extended by (most commonly) writing
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plugins for cli and backend. Extensions for netconf and restconf
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are also available.
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Plugins are written in C and easiest is to look at
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[example](example/README.md) or consulting the [FAQ](doc/FAQ.md).
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Yang
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====
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YANG and XML is at the heart of Clixon. Yang modules are used as a
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specification for handling XML configuration data. The YANG spec is
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used to generate an interactive CLI, netconf and restconf clients. It
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also manages an XML datastore.
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Clixon mainly follows [YANG 1.0 RFC 6020](https://www.rfc-editor.org/rfc/rfc6020.txt) with some exceptions:
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- conformance: feature, if-feature, deviation
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- identity, base, identityref
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- list features: min/max-elements, unique
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The aim is also to cover new featires in YANG 1.1 [YANG RFC 7950](https://www.rfc-editor.org/rfc/rfc7950.txt)
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Clixon has its own XML library designed for performance.
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Netconf
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=======
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Clixon implements the following NETCONF proposals or standards:
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- [NETCONF Configuration Protocol](http://www.rfc-base.org/txt/rfc-4741.txt)
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- [Using the NETCONF Configuration Protocol over Secure SHell (SSH)](http://www.rfc-base.org/txt/rfc-4742.txt)
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- [NETCONF Event Notifications](http://www.rfc-base.org/txt/rfc-5277.txt)
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Some updates are being made to RFC 6241 and RFC 6242.
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Clixon does not support the following features:
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- :url capability
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- copy-config source config
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- edit-config testopts
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- edit-config erropts
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- edit-config config-text
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Restconf
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========
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Clixon restconf is a daemon based on FASTCGI. Instructions are available to
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run with NGINX.
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The implementatation is based on [RFC 8040: RESTCONF Protocol](https://tools.ietf.org/html/rfc8040).
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The following features are supported:
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- OPTIONS, HEAD, GET, POST, PUT, DELETE
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The following are not implemented
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- PATCH
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- query parameters (section 4.9)
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- notifications (sec 6)
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- schema resource
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See [more detailed instructions](apps/restconf/README.md).
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Datastore
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=========
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The Clixon datastore is a stand-alone XML based datastore. The idea is
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to be able to use different datastores backends with the same
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API.
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Update: There used to be a key-value plugin based on qdbm but isnow obsoleted. Only a text datastore is implemented.
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The datastore is primarily designed to be used by Clixon but can be used
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separately.
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See [more detailed instructions](datastore/README.md).
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Auth
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====
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Authentication is managed outside Clixon using SSH, SSL, Oauth2, etc.
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For CLI, login is typically made via SSH. For netconf, SSH netconf subsystem can be used.
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Restconf however needs credentials. This is done by writing a credentials callback in a restconf plugin. See:
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* [FAQ](doc/FAQ.md#how-do-i-write-an-authentication-callback).
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* [Example](example/README.md) has an example how to do this with HTTP basic auth.
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* It would be possible for do this for more advanced mechanisms such as Oauth2 or (https://github.com/CESNET/Netopeer2/tree/master/server/configuration)
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There is an ongoing effort to implement authorization for Clixon according to [RFC8341(NACM)](https://tools.ietf.org/html/rfc8341), at least a subset of the functionality.
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Runtime
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=======
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<img src="doc/clixon_example_sdk.png" alt="clixon sdk" style="width: 180px;"/>
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The figure shows the SDK runtime of Clixon.
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