It's about to Trigger automatically schedular after bigquery table get loaded.
In Brief:
I don't want to use weekly schedule Query , that are manual task, I want this to make it automatically trigger the Schedular when table get loaded to the Bigquery table.
Currently I'm using manual weekly schedule query, I want that the query triggers automatically without any Manual things.
I am Just trying to think about logic but not getting koi.
Airflow doesn't provide an external trigger in the dag, but you can create your dag and trigger it from a cloud function once the table is loaded, this cloud function send a POST http request to Airflow API to trigger a new run with all the params your dag needs to process the data.
To trigger the cloud function, you can check this answer which explain how to use eventarc to listen your bigquery logs from cloud watch, filter them and trigger cloud function run.
To trigger the dag run, you can check the Airflow API doc and the API security doc in order to allow cloud function to send requests to the API.
Related
Our Google Analytics data events are exported to BigQuery tables. I have reports that need to run when the events data arrives which are set up as AWS lambdas with python code (for various reasons and I can't immediately move these to be Google Cloud Functions etc).
Is it possible to have the creation of a table trigger a lambda? At present, I have a lambda periodically checking to see if the table has been created which seems suboptimal. Eventarc looks like it might possibly be the way to monitor for the creation event at the BigQuery end but it doesn't seem obvious how you'd interface with AWS.
Any genius ideas? I have dug repeatedly through StackOverflow, but can't see a match for this issue
Eventarc isn't magic, it's only a wrapper of different things that you can do and customize (with a custom destination and not a Cloud Run).
Typically, Eventarc do:
Create a Cloud Logging sink on a specific log filter (filter what you want to get custom events)
Sink the filtered log entries in PubSub topic
Create a PubSub push subscription that invoke Cloud Run HTTP endpoint.
You can create piece by piece all those steps. And in the latest one, invoke your AWS Lambda instead of Cloud Run.
But the difficulty is not here. The difficulty comes from the variety of table creation possibilities:
By API call (table creation API)
By Load Job (load a file into a table create it automatically but without invoking the table creation API)
Directly in SQL with CREATE TABLE statement (but you can have also this statement in a script, you can have dynamic SQL,...)
And you might want to capture also the other creations (views, materialized views, procedure, functions,....)
At the end, your current method (invoque periodically the schema metadata info and get the recent addition in a dataset) could be the most "effortless" efficient!
I have a trigger on Eventarc that is supposed to run after each Cloud Scheduler invocation, which is google.cloud.scheduler.v1beta1.CloudScheduler.RunJob
However, it is not being triggered anyhow!
Other triggers, like force run, are working.
I want to trigger a Cloud Run after a Job execution. Is it possible or I am facing a bug?
If you are expecting your Cloud Run service to be executed at each scheduled invocation of Cloud Scheduler, it isn't possible to do so through Eventarc and Cloud Audit logs.
This is due to Cloud Scheduler not being in the list of services that write audit logs. Adding to that, the RunJob event you are filtering by will only get written if you manually execute a job (using the API), and not by your set CRON schedule.
A manual job run did trigger Eventarc when I tested this scenario, but I had to set my trigger as global.
If you would like to execute the Cloud Run service on a schedule, you can do that by having Cloud Scheduler send a request to the service URL directly. Another alternative is to instead of having Eventarc listen to Audit logs, have it listen to messages on a Pub/Sub topic, which will be sent by Cloud Scheduler. Let me know if this was helpful.
Not sure how to search this; I'm looking for a way to trigger a Cloud Function whenever a new row is inserted into a database in Cloud SQL. The search for "google cloud function events" (or "triggers") turn up Firebase results, which is not what I want.
There are a series of Cloud Functions that receive data and transform it according to the clients' needs; in the end, after some manipulation, that data ends up in a table. Is there an event I can listen to so I can access the newly inserted rows? If not, I might end up using the Cloud Scheduler and peek regularly into the DB. However, this solution doesn't seem viable for long-term.
I'd appreciate any advice.
Currently there is no official Cloud Function event which could be triggered on changes to a Cloud SQL database. You can check the available events in the Events and Triggers documentation.
You could still do something like it with Cloud Pub/Sub, and it could be done in 2 ways:
1 - The first would be to enable and export logs from the Cloud SQL instance to a Pub/Sub topic by creating a sink on Stackdriver, and have the Cloud Function listen to that topic.
Although this method does not require you to change the way you are inserting data to the DB, it might expose too much information, as all queries will be logged on Stackdriver. It also means you would not have full control of what information is passed to the function, as the message would be the contents of the log entry.
2 - The ideal solution would be to create the Pub/Sub topic and publish to it when you insert new data to the database. This way you have more control over the information sent to the topic. You can find more information about how to set up a new topic in the Cloud Pub/Sub documentation.
I'm new to bigquery and need to do some tests on it. Looking through bigquery documentation, i can't find nothing about creating jobs and scheduling them.
I found in other page on internet that the only available method is creating a bucket in google cloud storage and create a function in cloud functions using javascript, and inside it's body write down the sql query.
Can someone help me here? Is it true?
Your question is a bit confusing as you mix scheduling jobs with defining a query in a cloud function.
There is a difference in scheduling jobs vs scheduling queries.
BigQuery offers Scheduled queries. See docs here.
BigQuery Data Transfer Service (schedule recurring data loads from GCS.) See docs here.
If you want to schedule jobs for (load, delete, copy jobs etc) you better do this with a trigger on the observed resource like Cloud Storage new file, a Pub/Sub message, a HTTP trigger all this wired in a Cloud Function.
Some other related blog posts:
How to schedule a BigQuery ETL job with Dataprep
Scheduling BigQuery Jobs: This time using Cloud Storage & Cloud Functions
As per AWS docs, there's no Redshift-Lambda integration yet.
What we would like to do is monitoring redshift activity in order to do something when a redshift table is created, a copy from S3 is made or a bulk insert is performed.
Is there a way to register this kind of activity, and then do something similar to run a lambda function ir order run a small script or so?
Redshift provides an event notification mechanism. You can find a full list of the event categories and messages here. If that covers the kind of information you are interested in you can simply have your Lambda function add the SNS topic used by Redshift for event notification as an event source and your Lambda function will get called every time an event is sent by Redshift.
You can enable audit logs that end up in s3.
All the info you want is also available in various admin tables with prefixes like stl_, stv_ and pg_. For example, COPY commands from S3 are recorded in stl_load_commits, and stl_utilitytext has info on non-select queries like CREATE.
As for triggering events, you could have S3 trigger a lambda when one of the log files lands or run occasional jobs that query the system tables and take action with something like cron jobs or airflow.