commit	3c8e1c5e95e8bed8d0b4ae2c1ff47833a5eaf738	[log] [tgz]
author	subhash kumar singh <subh.singh@samsung.com>	Wed Aug 11 00:57:39 2021 +0530
committer	subhash kumar singh <subh.singh@samsung.com>	Wed Aug 11 00:57:39 2021 +0530
tree	d5ebdaddc9a7c7b747ab7b56c6e20450b7aa088e
parent	895402693b6c2c9dddfcefef1c411a821e42c42b [diff]

tree: d5ebdaddc9a7c7b747ab7b56c6e20450b7aa088e

README.md

O-RAN-SC Hello World Xapp in Golang

This repository contains open-source code for a prototype golang xAPP for near real-time RAN Intelligent Controller which makes use of golang Xapp Framework.

This xAPP aims to provide basic implementation of :

A1 interfaces interactions
Read-write operations into a persistent storage.
xAPP Configuration management
RMR Health Check
xAPP SDL Check
Raising alarms
Generating metrics
E2 Interface intereactions

Introduction

This document provides guidelines on how to install and configure the HW Golang xAPP in various environments/operating modes. The audience of this document is assumed to have good knowledge in RIC Platform.

Preface

This xAPP can be run directly as a Linux binary, as a docker image, or in a pod in a Kubernetes environment. The first two can be used for dev testing. The last option is how an xAPP is deployed in the RAN Intelligent Controller environment. This covers all three methods.

Docker
Linux Binary
Kubernetes

Software Installation and Deployment

Onboarding of hw-go using dms_cli tool

dms_cli offers rich set of command line utility to onboard hw-go xapp to chartmuseme.

First checkout the hw-go repository from gerrit.

git clone "https://gerrit.o-ran-sc.org/r/ric-app/hw-go"

hw-go has following folder structure

├── Dockerfile
├── INFO.yaml
├── LICENSES.txt
├── README.md
├── config
│   ├── config-file.json           // descriptor for hw-go
│   ├── schema.json                // schema for controls section of descriptor
│   └── uta_rtg.rt                 // local route file
├── docs
├── go.mod
├── go.sum
└── hwApp.go

For onboarding hw-go make sure that dms_cli and helm3 is installed. One can follow documentation to configure dms_cli.

Once dms_cli is availabe we can proceed to onboarding proceure.

configure the export CHART_REPO_URL to point chartmuseme.

$export CHART_REPO_URL=http://<service-ricplt-xapp-onboarder-http.ricplt>:8080

check if dms_cli working fine.

$ dms_cli health
True

Now move to config folder to initiate onboarding.

$ cd config
$ dms_cli onboard --config_file_path=config-file.json --shcema_file_path=schema.json
httpGet:
  path: '{{ index .Values "readinessProbe" "httpGet" "path" | toJson }}'
  port: '{{ index .Values "readinessProbe" "httpGet" "port" | toJson }}'
initialDelaySeconds: '{{ index .Values "readinessProbe" "initialDelaySeconds" | toJson }}'
periodSeconds: '{{ index .Values "readinessProbe" "periodSeconds" | toJson }}'

httpGet:
  path: '{{ index .Values "livenessProbe" "httpGet" "path" | toJson }}'
  port: '{{ index .Values "livenessProbe" "httpGet" "port" | toJson }}'
initialDelaySeconds: '{{ index .Values "livenessProbe" "initialDelaySeconds" | toJson }}'
periodSeconds: '{{ index .Values "livenessProbe" "periodSeconds" | toJson }}'

{
    "status": "Created"
}

Check if hw-go is onborded

$ curl --location --request GET "http://<appmgr>:32080/onboard/api/v1/charts"  --header 'Content-Type: application/json'

{
    "hw-go": [
        {
            "name": "hw-go",
            "version": "1.0.0",
            "description": "Standard xApp Helm Chart",
            "apiVersion": "v1",
            "appVersion": "1.0",
            "urls": [
                "charts/hw-go-1.0.0.tgz"
            ],
            "created": "2021-06-24T18:57:41.98056196Z",
            "digest": "14a484d9a394ed34eab66e5241ec33e73be8fa70a2107579d19d037f2adf57a0"
        }
    ]
}

If we would wish to download the charts then we can perform following curl operation :

curl --location --request GET "http://<appmgr>:32080/onboard/api/v1/charts/xapp/hw-go/ver/1.0.0"  --header 'Content-Type: application/json' --output hw-go.tgz

Now the onboarding is done.

Deployment of hw-go

Once charts are available we can deploy the the hw-go using following curl command :

$ curl --location --request POST "http://<appmgr>:32080/appmgr/ric/v1/xapps"  --header 'Content-Type: application/json'  --data-raw '{"xappName": "hw-go", "helmVersion": "1.0.0"}'
{"instances":null,"name":"hw-go","status":"deployed","version":"1.0"}

Deployment will be done in ricxapp ns :

# kubectl get po -n ricxapp
NAME                             READY   STATUS    RESTARTS   AGE
ricxapp-hw-go-55ff7549df-kpj6k   1/1     Running   0          2m

# kubectl get svc -n ricxapp
NAME                         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)             AGE
aux-entry                    ClusterIP   IP1             <none>        80/TCP,443/TCP      73d
service-ricxapp-hw-go-http   ClusterIP   IP2             <none>        8080/TCP            103m
service-ricxapp-hw-go-rmr    ClusterIP   IP3             <none>        4560/TCP,4561/TCP   103m

Now we can query to appmgr to get list of all the deployed xapps :

# curl http://service-ricplt-appmgr-http.ricplt:8080/ric/v1/xapps | jq .
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   347  100   347    0     0    578      0 --:--:-- --:--:-- --:--:--   579
[
  {
    "instances": [
      {
        "ip": "service-ricxapp-hw-go-rmr.ricxapp",
        "name": "hw-go-55ff7549df-kpj6k",
        "policies": [
          1
        ],
        "port": 4560,
        "rxMessages": [
          "RIC_SUB_RESP",
          "A1_POLICY_REQ",
          "RIC_HEALTH_CHECK_REQ"
        ],
        "status": "running",
        "txMessages": [
          "RIC_SUB_REQ",
          "A1_POLICY_RESP",
          "A1_POLICY_QUERY",
          "RIC_HEALTH_CHECK_RESP"
        ]
      }
    ],
    "name": "hw-go",
    "status": "deployed",
    "version": "1.0"
  }
]

Logs from hw-go :

# kubectl  logs ricxapp-hw-go-55ff7549df-kpj6k -n ricxapp
{"ts":1624562552123,"crit":"INFO","id":"hw-app","mdc":{"time":"2021-06-24T19:22:32"},"msg":"Using config file: config/config-file.json"}
{"ts":1624562552124,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Serving metrics on: url=/ric/v1/metrics namespace=ricxapp"}
{"ts":1624562552133,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Register new counter with opts: {ricxapp SDL Stored The total number of stored SDL transactions map[]}"}
{"ts":1624562552133,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Register new counter with opts: {ricxapp SDL StoreError The total number of SDL store errors map[]}"}
1624562552 6/RMR [INFO] ric message routing library on SI95 p=0 mv=3 flg=00 (fd4477a 4.5.2 built: Jan 21 2021)
{"ts":1624562552140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"new rmrClient with parameters: ProtPort=0 MaxSize=0 ThreadType=0 StatDesc=RMR LowLatency=false FastAck=false Policies=[]"}
{"ts":1624562552140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Register new counter with opts: {ricxapp RMR Transmitted The total number of transmited RMR messages map[]}"}
{"ts":1624562552140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Register new counter with opts: {ricxapp RMR Received The total number of received RMR messages map[]}"}
{"ts":1624562552140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Register new counter with opts: {ricxapp RMR TransmitError The total number of RMR transmission errors map[]}"}
{"ts":1624562552140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Register new counter with opts: {ricxapp RMR ReceiveError The total number of RMR receive errors map[]}"}
{"ts":1624562552140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"Xapp started, listening on: :8080"}
{"ts":1624562552140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:32"},"msg":"rmrClient: Waiting for RMR to be ready ..."}
{"ts":1624562553140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:33"},"msg":"rmrClient: RMR is ready after 1 seconds waiting..."}
{"ts":1624562553141,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:33"},"msg":"xApp ready call back received"}
1624562553 6/RMR [INFO] sends: ts=1624562553 src=service-ricxapp-hw-go-rmr.ricxapp:0 target=localhost:4591 open=0 succ=0 fail=0 (hard=0 soft=0)
1624562553 6/RMR [INFO] sends: ts=1624562553 src=service-ricxapp-hw-go-rmr.ricxapp:0 target=localhost:4560 open=0 succ=0 fail=0 (hard=0 soft=0)
1624562553 6/RMR [INFO] sends: ts=1624562553 src=service-ricxapp-hw-go-rmr.ricxapp:0 target=service-ricplt-a1mediator-rmr.ricplt:4562 open=0 succ=0 fail=0 (hard=0 soft=0)
RMR is ready now ...
{"ts":1624562557140,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:37"},"msg":"Application='hw-go' is not ready yet, waiting ..."}
{"ts":1624562562141,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:42"},"msg":"Application='hw-go' is not ready yet, waiting ..."}
{"ts":1624562567141,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:47"},"msg":"Application='hw-go' is not ready yet, waiting ..."}
{"ts":1624562567370,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:47"},"msg":"restapi: method=GET url=/ric/v1/health/ready"}
{"ts":1624562569766,"crit":"INFO","id":"hw-app","mdc":{"CONTAINER_NAME":"","HOST_NAME":"","HWApp":"0.0.1","PID":"6","POD_NAME":"","SERVICE_NAME":"","SYSTEM_NAME":"","time":"2021-06-24T19:22:49"},"msg":"restapi: method=GET url=/ric/v1/health/alive"}

Here we are done with the onboaring and deployment of hw-go.

License


   Copyright (c) 2021 Samsung Electronics Co., Ltd. All Rights Reserved.

   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.