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README-devel.md

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Tasks

A Task represents the flasher work to install one or more firmware on a server.

Tasks may transition through four possible states,

  • pending
  • queued
  • active
  • failed
  • succeeded

Actions

Flasher plans and executes an Action for each firmware to be installed within a Task.

Steps

A Step is the smallest unit of work carried out by flasher as part of an Action.

Flow diagram

The diagram below depicts a flow diagram for a flasher Task to install one firmware.

graph TD;
	n5("Initialize");
	n7("Plan");
	n6("Query");
	n8("Run");
	n2("active");
	n10("checkInstalledFirmware");
	n11("downloadFirmware");
	n4("failed");
	n1("pending");
	n13("pollInstallStatus");
	n9("powerOnServer");
	n3("succeeded");
	n12("uploadFirmwareInitiateInstall");
	n5-->n6;
	n7-->|"Plan actions"|n8;
	n6-->|"Installed firmware equals expected"|n3;
	n6-->|"Query for installed firmware"|n7;
	n8-->|"Power on server - if its currently powered off."|n9;
	n2-->|"Invalid task parameters"|n4;
	n2-->n5;
	n10-->|"Task Failed"|n4;
	n10-->|"Download and verify firmware file checksum."|n11;
	n11-->|"Task Failed"|n4;
	n11-->|"Initiate firmware install for component."|n12;
	n1-->|"Task active"|n2;
	n13-->|"Task Failed"|n4;
	n13-->|"Task Successful"|n3;
	n9-->|"Task Failed"|n4;
	n9-->|"Check firmware currently installed on component"|n10;
	n12-->|"Task Failed"|n4;
	n12-->|"Poll BMC for firmware install status until its identified to be in a finalized state."|n13;
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