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I am trying to automate deployment to a Google Flex App Engine in a bitbucket pipeline.

If I'm deploying via the CLI I can run something like this to run migrations after deployment:

gcloud app instances ssh --quiet --project <MYPROJECT> --version v0-0-1 --container=gaeapp --service <MYSERVICE> -- do-something-after-deploy.sh

However, this prompts me for this:

ED25519 key fingerprint is SHA256:....................
Are you sure you want to continue connecting (yes/no/[fingerprint])?

It doesn't look like I can use ssh-keyscan to accept the host key. Is there a way to automate the execution of a script on google app engine after deployment?

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If you don't want to be prompted when running a Cloud SDK command you can use the --quiet flag. As shown in the documentation:

--quiet, -q
Disable all interactive prompts when running gcloud commands. If input is required,
defaults will be used, or an error will be raised. Overrides the default
core/disable_prompts property value for this command invocation. This is equivalent to
setting the environment variable CLOUDSDK_CORE_DISABLE_PROMPTS to 1.
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  • But he has already used --quiet!
    – Michael Hampton
    Mar 3, 2021 at 18:03
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    I think --quiet removes the prompts on the gcloud command, but not the ssh command that it executes on the intermediate shell.
    – mikebridge
    Mar 4, 2021 at 0:21
  • Hi Mike, I missed that. I believe you are right. However I am not sure that your approach is recommended since ssh the instance is meant for debugging purposes
    – llompalles
    Mar 4, 2021 at 10:57

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