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== Receive the alert from MDC (Mock Data Challenge) analysis == == Receive alert from MDC (Mock Data Challenge) analysis ==
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 * Launch the igwn-alert
 {{{
% igwn-alert --g gracedb-playground listen
 }}}

Introduction

  • LIGO-Virgo Alert System (LVAlert) igwn-alert

    • The International Gravitational Wave Network Alert System (igwn-alert) is a notification service built on the Apache Kafka protocol and the pubsub extension.
    • It is a higher-level modification of SCIMMA's hop-client to streamline receiving and responding to alerts from GraceDB.
    • This package replaces the legacy LIGO LVAlert XMPP-based alert system.
    • The API are compatible with Python 3
  • Retirement of existing LVAlert service targeted for ~April 2022.
    • In O4, we will use igwn-alert.

Install

  • The latest version is 0.1.2 (2021/12/07)
    • Available in pip and conda shortly. 
    conda install igwn-alert
    pip install igwn-alert
  • help 
    % igwn-alert -h
usage: igwn-alert [-h] [-g GROUP] [-l {critical,error,warning,info,debug}] [-n NETRC] [-s SERVER] [-u USERNAME] {listen,subscriptions,topics,unsubscribe,send} ...

positional arguments:
  {listen,subscriptions,topics,unsubscribe,send}
                        sub-command help
    listen              Listen for igwn-alert messages and print them to stdout.
    subscriptions       List your subscriptions
    topics              List available pubsub topics
    unsubscribe         Unsubscribe from one or more topics
    send                publish contents of a file to a pubsub topic

optional arguments:
  -h, --help            show this help message and exit
  -g GROUP, --group GROUP
                        GraceDB group name (e.g., gracedb, gracedb-playground)
  -l {critical,error,warning,info,debug}, --log {critical,error,warning,info,debug}
                        Log level
  -n NETRC, --netrc NETRC
                        netrc file (default: read from NETRC environment variable or ~/.netrc)
  -s SERVER, --server SERVER
                        igwn-alert server hostname
  -u USERNAME, --username USERNAME
                        User name (default: look up in auth.toml or .netrc)

Setting in advance on web

  • The authentification between the client and the server is managed by SciMMA.

  • The first step is to make a SCiMMa account by visiting https://my.hop.scimma.org/.

    • At this time, access to igwn-alert is limited to LIGO, Virgo, or KAGRA members.

  • After log-in https://my.hop.scimma.org/, by clicking Create new credentials, the password for your account will be shown just once.

Adding Authentication in local

  • Run the hop command and enter the username and the password.

    • Empty Hostname is fine. 
    hop auth add

  • Once you entered, the authentification credential is stored in ~/.config/hop/auth.toml .

Usage in local

  • Initially, no topic (you can consider channel) is registered to your account.

  • Command Line Interface

  • This doesn't show anything. 
    % igwn-alert topics
Topics for group gracedb associated with the current credential:

Receive alert from MDC (Mock Data Challenge) analysis

  • Follow instruction by Joe.

  • If you set up properly, check the topics which you are subscribing. 
    % igwn-alert --group gracedb-playground topics
Topics for group gracedb-playground associated with the current credential:
mdc_superevent
cbc_pycbc
  • Launch the igwn-alert 
    % igwn-alert --g gracedb-playground listen

KAGRA/Subgroups/DET/LVAlert (last edited 2022-05-26 18:05:01 by HirotakaYuzurihara)