dp-import-tracker

Check for completed import instances, and mark them (and possibly their associated/parent import job) as completed.

• At startup, ask the Dataset API for the list of active instances.

• Add to the above in-memory list when INPUT_FILE_AVAILABLE_TOPIC events arrive.

• Also, listen for IMPORT_OBSERVATIONS_INSERTED_TOPIC events, and inform the Dataset API with those additional numbers of inserted observations.

• Regularly check the Dataset API for the total number of observations, and the current count of inserted observations. When the total has been inserted, mark the status of the instance as completed (and similar for the parent import job, if all other instances are also completed).

INPUT_FILE_AVAILABLE_TOPIC events are published by the Import API.

IMPORT_OBSERVATIONS_INSERTED_TOPIC events are published by the Observation Importer.

Getting started

Service is authenticated against zebedee, one can run dp-auth-api-stub to mimic service identity check in zebedee. make debug

Kafka scripts

Scripts for updating and debugging Kafka can be found here(dp-data-tools)

Configuration

Environment variable	Default	Description
INPUT_FILE_AVAILABLE_TOPIC	input-file-available	topic name for import file available events
INPUT_FILE_AVAILABLE_CONSUMER_GROUP	dp-import-tracker	consumer group name for import file available events
IMPORT_OBSERVATIONS_INSERTED_TOPIC	import-observations-inserted	topic name for numbers of inserted observations
IMPORT_OBSERVATIONS_INSERTED_CONSUMER_GROUP	dp-import-tracker	consumer group name for numbers of inserted observations
HIERARCHY_BUILT_TOPIC	hierarchy-built	topic name for built hierarchies
HIERARCHY_BUILT_CONSUMER_GROUP	dp-import-tracker	consumer group name for built hierarchies
SEARCH_BUILT_TOPIC	dimension-search-built	topic name for search built
SEARCH_BUILT_CONSUMER_GROUP	dp-import-tracker	consumer group name for search built
DATA_IMPORT_COMPLETE_TOPIC	data-import-complete	topic name for hierarchies ready to be imported
KAFKA_ADDR	localhost:9092	A list of kafka brokers
KAFKA_VERSION	1.0.2	The kafka version that this service expects to connect to
KAFKA_SEC_PROTO	unset	if set to TLS, kafka connections will use TLS [1]
KAFKA_SEC_CLIENT_KEY	unset	PEM for the client key [1]
KAFKA_SEC_CLIENT_CERT	unset	PEM for the client certificate [1]
KAFKA_SEC_CA_CERTS	unset	CA cert chain for the server cert [1]
KAFKA_SEC_SKIP_VERIFY	false	ignores server certificate issues if true [1]
KAFKA_OFFSET_OLDEST	true	sets kafka offset to oldest if true
IMPORT_API_ADDR	http://localhost:21800	The address of Import API
DATASET_API_ADDR	http://localhost:22000	The address of Dataset API
BIND_ADDR	:21300	address to listen on for healthcheck requests
GRACEFUL_SHUTDOWN_TIMEOUT	5s	how much grace time to allow when shutting down (time.duration)
SERVICE_AUTH_TOKEN	AB0A5CFA-3C55-4FA8-AACC-F98039BED0AC	The service authorization token
ZEBEDEE_URL	http://localhost:8082	The host name for Zebedee
CHECK_COMPLETE_INTERVAL	2000ms	how much time between checking for instances
INITIALISE_LIST_INTERVAL	4s	on startup, if getting instance list fails, how much time to wait before retries
INITIALISE_LIST_ATTEMPTS	20	on startup, how many times to retry for instances, before exiting, see INITIALISE_LIST_INTERVAL
HEALTHCHECK_INTERVAL	30s	The period of time between health checks
HEALTHCHECK_CRITICAL_TIMEOUT	90s	The period of time after which failing checks will result in critical global check

Notes:

1. For more info, see the kafka TLS examples documentation

Graph / Neptune Configuration

Environment variable	Default	Description
GRAPH_DRIVER_TYPE	""	string identifier for the implementation to be used (e.g. 'neptune' or 'mock')
GRAPH_ADDR	""	address of the database matching the chosen driver type (web socket)
NEPTUNE_TLS_SKIP_VERIFY	false	flag to skip TLS certificate verification, should only be true when run locally

:warning: to connect to a remote Neptune environment on MacOSX using Go 1.18 or higher you must set NEPTUNE_TLS_SKIP_VERIFY to true. See our Neptune guide for more details.

Contributing

See CONTRIBUTING for details.

License

Copyright © 2016-2021, Office for National Statistics (https://www.ons.gov.uk)

Released under MIT license, see LICENSE for details.