This is a follow up post to yesterday’s write up on deploying spyre to Google Cloud. If you haven’t read that post yet check it out first and then come back.
In yesterday’s post I mentioned that a benefit to deploying to Google Cloud is access to storage engines like BigQuery. In this post we’ll walk through steps to incorporate BiqQuery into your spyre apps. Before continuing, walk through the Big Query quickstart guide to ensure that API access to BigQuery is turned on.
We’ll be deploying another example from the spyre repo. If you’ve successfully deployed the sinewave example you should have everything you need to get started. cd to
spyre/tutorial/google_cloud/weatherhistory. There you’ll find a startup script that’s very similar to the one we used to deploy the sinewave example. The only real difference is we need to specify the latest pandas version since we’ll be using a module not available in older versions.
Also, this time you will need to update
with a link to your forked repo. Unlike the sinewave example, you’ll need to make an update to the app’s code. Open
weatherhistoryapp.py and replace the line
with your project id. Make sure you commit your change and push it up to your copy of the repo on github.
While you’ve got
weatherhistoryapp.py open take a look at the
get_data method. Here we’re using pandas’
read_gbq method to query BigQuery:
Bigquery provides access to a few publicly available datasets. We’re using one of those publicly available tables for our weather history app, but I encourage you to try loading your own data into bigquery.
When running this script on a Google Compute Engine instance, all of the authentication/authorization is done automatically. You can also run this locally, but you may need to run this SDK command from the command line first:
Additionally, the first time you run the app you may be directed to an authentication page in your browser. Just following the instructions in your terminal window and you’ll be up and running in a matter of seconds.
Finally, when we create our instance we’ll need to specify that we want our instance to have access to the the BigQuery API. You can do this with the SDK tool with the
--scopes argument. Here’s the full command:
(don’t forget to replace [PROJECT_ID] with your project id). You can also add API access when creating an instance from the web console under
Identity and API access by checking the
Set access for each API button and setting
If your deploying to the same project id that you used to deploy the sinewave app, http access to port 8080 should already be open. If this is a new project, run the gcloud command to open that port:
After a few minutes you should be able to access your app on port 8080 at the instance’s external IP address. If you need to troubleshoot, remember that you can view your app’s logs from the Compute Engine’s web console.
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