This repository is for code related to the investigation of FABRIC as a type of resource useful to CMB-S4. More information for FABRIC is at FABRIC.

A full investigation would have prompt map making and transient processing occur in a fabric-like infrastructure.

The Phase One project is to mock up transient processing for the CMB-S4 DC1 within Fabric. The minimal intergration planned for evaluation is to attempt::

• Dynamically provision FABRIC Resources
• Ingest the maps needed for transient processing, thought to be 30 "per observations maps"
• Run transient detection codes.
• Emit transients to an endpoint representing "the transient community"
• Tear Down FABRIC resources.

and write up results.

We are using the hop-client package available from pip.

In the scimma hopskotch instance, The phase one channel is cmb-s4-fabric-tests.phase-one-testing

Before use,

• obtain an identity and SCRAM credential from my.hop.scimma.org
• use the "hop auth add" to store the credential (Leave hostname blank)
• Ask Don to authorize you to acess the cmb-s4-fabric-tests.phase-one-testing topic.
• arrange for outbound (kafka) port 9092 to be open
• test connectivity with 'echo 'test' | nc -w 10 kafka.scimma.org 9092; echo $?'

The scimma_utils packages included here further wraps the pbulish and subscribe subfunctions in hop.

Tutorial is here. Shell Command documentation is here.

your OS may be supplying a version of openssl with a bug in it. A work around is:

• $hop auth locate
• cat the file gven by hop auth locate
• edit the file pointed to by ssl_ca_location
• find the DST Root CA X3, in that file delete/cut that certificate out of it,

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