Hi Elliott,
I have been able to narrow down the problem. There is a mismatch
between the app URL with a defined service name and the cron job "host"
used.
I can explain it as follows:
if you have an app.yaml file such as this:
runtime: python38
handlers:
# This configures Google App Engine to serve the files in the app's static
# directory.
- url: /static
static_dir: static/
# This handler routes all requests not caught above to your main app. It is
# required when static routes are defined, but can be omitted (along with
# the entire handlers section) when there are no static files defined.
- url: /.*
script: auto
#END OF APP.YAML
-------------------------
and a cron.yaml file that looks like this:
cron:
- description: "Example cron job"
url: /myjob/
schedule: every 2 minutes
#END OF CRON.YAML
The App Engine cron job will make a request to the "resource": "/myjob/"
and "host": "projectid.ew.r.appspot.com"
as seen in the protoPayLoad in the log file for the app on the App Engine.
This works fine as the app url is "projectid.ew.r.appspot.com"
If you give the app a service name such as service1 in the app.yaml file by
adding:
service: service1
and then target that service in the cron.yaml file which looks like this:
cron:
- description: "Example cron job"
url: /myjob/
schedule: every 2 minutes
target: service1
Then, the app is deployed to service1-dot-projectid.ew.r.appspot.com
But the cron job uses a "resource":/myjob/ and "host": "
service1.projectid.ew.r.appspot.com"
There is a mismatch between the app url and the host the cron job uses. The
app has -dot- between the service and the project name
while the cron looks for service1.projectid.ew.r.appspot.com with just "."
instead of "-dot-"
What is the best way to ensure the cron job uses the right "host" URL?
Preferably "-dot-".
Regards
David
On Tue, Dec 15, 2020 at 7:38 PM 'Elliott (Cloud Platform Support)' via
Google App Engine <[email protected]> wrote:
> Hello,
>
> I understand that you have a problem with your application. Although
> Google Groups is meant for general discussions, we may still be able to
> guide you, at least a little bit.
>
> To move things forward, would you be able to share some redacted logs
> about the 400 error? I was able to find this
> <https://developer.mozilla.org/en-US/docs/Web/HTTP/Status> article with
> basic information.
>
> Client error responses:
> 400 Bad Request
> The server could not understand the request due to invalid syntax.
>
>
>
> On Tuesday, December 15, 2020 at 12:04:59 PM UTC-5 [email protected]
> wrote:
>
>> Hi have a Python 3.8 Django app deployed to GAE standard with a working
>> cron job that
>> executes an endpoint. The endpoint returns a 200 when everything goes
>> well.
>> The app.yaml file does not define the service name and is the default
>> service.
>> there is only one job in the cron.yaml and does not specify a target
>> service.
>>
>> When I specify the service name in the app.yaml and specify the cron job
>> to
>> target that same service, it executes the endpoint but returns a status
>> 400
>> and doesn't execute the code in the endpoint function.
>>
>> What is causing the status 400?
>>
>>
>> --
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