#==================================================================================
-
# Copyright (c) 2018-2019 AT&T Intellectual Property.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# limitations under the License.
#==================================================================================
-This repo contains code related to the admission control xapp.
-Main source code for the xapp is under src/
+This repository contains source code for a prototype open-source admission control xAPP.
+The admission control xAPP subscribes and listens for SgNB Addition Request X2AP messages. Upon
+receiving one, it makes a decision on whether to accept or reject the request based on a simple
+sliding window. If the decision is to accept the request, it sends an SgNB Addition Acknowledge, else
+it sends an SgNB Addition Reject message.
+
+1. Building docker image of the Admission Control xAPP
+------------------------------------------------------
+ Simply run : docker build -t <image-name> ./
+ IMPORTANT : docker user must have credentials to access to the LF O-RAN docker repository : nexus3.o-ran-sc.org:10004, which can be done with docker login prior to running the build
+
+
+2. Compiling and invoking the AC xAPP directly
+-----------------------------------------------
+The Admission Control xAPP may be compiled and invoked directly. Required components for compilation are documeted in the Dockerfile (and also in README under src/). A sample script src/run_xapp.sh is provided to show how to invoke the admission control xAPP with various options.
+
+3. Invoking xAPP docker container directly (ie not in RIC Kubernetes env.)
+------------------------------------------------------------------
+The xAPP docker run time can be configured with a json configuration file (example provided under init/config-file.json). Once such a file is availabel (say under directory /home/user/test-config), the docker image can be invoked as
+docker run --net host -it --rm -v "/home/user/test-config:/opt/ric/config" --name "AC-xAPP" <image>
+See REAMDE.md under the init directory for more details.
+
+
+4. Invoking docker xAPP container in RIC Kubernetes environment
+--------------------------------------------------------------
+xAPPs are deployed via the xapp manager in the RIC. In order to be deployable, a helm chart of the xAPP is created and uploaded to the helm
+repository. Typically the helm chart must be created by the RIC team rather than the xAPP owner since the helm chart will contain several environment
+specific parameters. However, the xAPP owner may provide any xAPP specific configuration via a JSON configuration file and associated schema.
+A sample configuration json file (which MUST be named config-file.json) and schema are provided under init/. Parameters of the JSON
+are documented in README under the init/ directory.
-Look at Dockerfile for building instructions
+5. Testing Admission Control xAPP
+---------------------------------
+The Admission Control xAPP can be tested using mockups available under the test directory.
+1. mock-e2term-server can be used to send X2 SgNB Addition Requests at a specified rate and monitor responses from the xAPP
+2. mock_ves_collectory.py is a simply cherrypy web-server which can be used to receive metrics from the AC xAPP
+3. mock_a1_mediator can be used to test sending policies to the AC xAPP.
+The README.md under the test directory contains instructions on how to build and use these mock up tools.
-NOTE : In order to compile code as a stand alone process, following pre-requisites are required
--- For compilation, the nanomsg, nng and ric messaging libraries, as well as ric messaging header must be installed in standard paths (or if non-default, then visible in search paths)
--- mdclog library and headers must be installed and available in search path
+6. Layout
+---------
+ a. src/ contains code for the admission control xAPP. See README.md under src for more information, as well as how to run the compiled executable directly (without docker container).
-NOTE:
-In order to test the code,
+ b. test/ contains unit tests as well as mock up tools for integration testing
--- An E2 termination must be available
+ c. schemas/ contains the various JSON schemas, sample responses/inputs used by the Admission Control (AC) xAPP for setting/getting policies as wellreporting metrics.
--- A ves collector which collects metrics must be available
+ d. init/ contains a sample JSON configuration file and python script for starting xAPP in a container (only the JSON config should be modified as per environment)
-The run_xapp.sh script provides a convenient way to set the various parameters and invoke the process (if not running in a docker container)
+ e. asn1c_defs : Contains all the getter/setting asn1c generated code for manipulating/decoding/encoding ASN1 E2AP/E2SM/X2AP packages
Code Review / ric-app / admin.git / blobdiff