Event Logger Data Interfaces

Documenting the event logger data interfaces and action models.

• The EVT is the Event Translation Layer, which receive a set of events from a Bitbake build run, and builds a in-memory record set describing the build.
• The DSI is the Data Store Interface that will poll new records from each of the EVTs assigned to it, and write them in permanent record.
• The AAM is the Artifacts Analysis Module. This module is run on build complete, scans the build/ directory for artifacts, and generates records sets about the build artifacts that will be stored in the data store.

EVT

Bitbake uses a push-event model where it sends pickled Python objects over XMLRPC to an event sink. EVT receives Python objects describing the progress of a build run, and updates its internal state to match the state of the Bitbake server. It will generate a set of records describing the statistics and results of the build run, e.g. task records for all the tasks that did run, build records for all targets, etc.

interface with bitbake

The bitbake server runs at IP:PORT location. A event server controller lives at IP:(PORT+2) accepting a XMLRPC interface with two commands: registerEventHandler and unregisterEventHandler.

EVT will run resident in memory, connecting to the bitbake server and accepting events. It will have an internal state that will follow the internal state of the bitbake server. This allows the EVT to infer information about the server state, and export this information to the DSI.

The event list that it receives from Bitbake is documented here, together with standard actions being taken in Knotty and what should happen in EVT.

Event object type	action taken in Knotty	action in EVT
bb.runqueue.runQueueExitWait	Assigns 1 for main.shutdown if not already set
bb.event.LogExecTTY	If the stdin and stdout are terminals -> while there are still tries: if the event finishes successfully, the loop exists, and bb continues with other events. else it waits for sleep_delay amount of time and retries. A warning message is written in the logger file.
logging.LogRecord	If there is an error or warning, count them Log every event
bb.build.TaskFailed	If a logfile is found: display error by reading the logfile
bb.build.TaskBase	Log the event message in the logger file
bb.event.ParseStarted	Start a new parseprogress if event.total is not zero
bb.event.ParseProgress	Update the parse progress based on the current event
bb.event.ParseCompleted	If there is a parseprogress object, finish it and print to the console the results of the parse
bb.event.CacheLoadStarted	Create a cacheprogress object
bb.event.CacheLoadProgress	Update the cacheprogress based on the current event
bb.event.CacheLoadCompleted	Finish the current cacheprogress and print the number of events grabbed from dependency cache
bb.command.CommandFailed	Mark this as an error and exit the main loop by putting shudown into state 2
bb.command.CommandExit	If a returned value is not set, grab the event exit code and set it as a return value
bb.command.CommandCompleted	Put shutdown into state 2
bb.cooker.CookerExit	Put shutdown into state 2
bb.event.MultipleProviders	Log info about multiple providers available and instruct the user to define a PREFERRED_PROVIDER
bb.event.NoProvider	Mark this as an error Check dependees and log the error List the error reasons in the log file
bb.runqueue.sceneQueueTaskStarted	Marks the start of a scene queue task and logs info about it
bb.runqueue.runQueueTaskStarted	Marks the start of a queue task and logs info about it
bb.runqueue.runQueueTaskFailed	Grab failed task, append it to task failures and log the error together with the exit code
bb.runqueue.sceneQueueTaskFailed	Log a warning about the setscene task that failed together with the exit code and report that the real task will be ran instead
bb.event.BuildBase	ignored	ignored
bb.event.StampUpdate	ignored	ignored
bb.event.ConfigParsed	ignored	timestamp entry
bb.event.RecipeParsed	ignored	timestamp entry
bb.event.RecipePreFinalise	ignored	ignored
bb.runqueue.runQueueEvent	ignored
bb.runqueue.runQueueExitWait	ignored
bb.event.OperationStarted	ignored	timestamp
bb.event.OperationCompleted	ignored	timestamp, operation complete, timing
bb.event.OperationProgress	ignored	ignored
bb.event.DiskFull	ignored	error

DSI

interface with the Data Store system

The data interface is based on the Django ORM. A definition of Django models for build and task information is available.

Artifacts analysis module

Once a Bitbake build is completed, it's artifacts are available for usage, inspection and download. The artifacts analysis module (AAM) will be launched by EVT at the end of a build, parse the generated artifacts and insert relevant data into the DSI.