Boto3 get region during startup_fn()

[kopf-archiver]

An issue by jicowan at 2020-01-17 17:58:23+00:00
Original URL: zalando-incubator/kopf#297
 

Question

I am calling a method in my startup_fn() that queries instance metadata to get the region. I use the region to create global environment variables for boto3 clients like ec2 and eks. When the code runs, I get an error that the region must be set. How should I handle this?

Here is the code I'm using in my startup_fn():

@kopf.on.startup()
async def startup_fn(logger, **kwarg):
    global region, eks, ec2, iam, cluster_name
    cluster_name, region = get_metadata()
    eks = client('eks', region_name=region)
    ec2 = client('ec2', region_name=region)
    iam = resource('iam')

Checklist

• [ x] I have read the documentation and searched there for the problem
• [ x] I have searched in the GitHub Issues for similar questions

Keywords

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Commented by jicowan at 2020-01-17 19:23:32+00:00
 

When I moved the variable declarations out of the handler, it worked. I wanted to do it as part of the setup handler; I'm using the HTTP request library to call ec2 metadata: get_metadata(). I didn't want the operator to start until the region was set.

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Commented by nolar at 2020-01-20 11:44:05+00:00
 

Can you please show the error and its stack trace?

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Commented by jicowan at 2020-01-20 15:41:47+00:00
 

nolar I will have to move the code back to the startup handler to get the trace. It basically said that the region was not set when it when I referenced the variables in the create handler.