Add custom script to execute at installation end

[ltagliamonte]

As suggested I'm opening this discussion before submitting a PR. I'd like to add a new boot flag like --postscript_url able to download a script and run it at the end of the installation process. I think it is very useful for people like me that have to install additional software or perform customisation after the Cassandra installation and have those script saved somewhere else. Is anything wrong with my idea?

[arodrime]

FWIW, we apply a dynamical configuration through a capistrano script. You might want have a look to capistrano or equivalent or even better to Ancible, Chef or Salt.

C*heers,

Alain

[ltagliamonte]

Thanks Alain, i'd like to complete the customisation at the boot without using additional software. I submitted the following PR: https://github.com/riptano/ComboAMI/pull/92

[mlococo]

Before I decide whether to merge this, have you looked at the --repository flag? ComboAMI 2.6.x already self-updates using git on boot, and already allows you to perform that update against an arbitrary https repository.

Is there a reason you don't want to use that mechanism to deliver your customizations?

[ltagliamonte]

thanks @mlococo i didn't see it, btw i'm not using a public git repo so it would be easy for me customise the AMI using a http + basic_auth endpoint. Looking forward to your feedback.

[mlococo]

Made some comments in the PR, will merge once:

• The comments are resolved.
• You confirm that you've manually tested this with 2.6.3 by using the --repository flag to point at your fork/branch and can run without errors both with and without a --postscript_url specified.

[ltagliamonte]

@mlococo i did all the changes and tested it, i'm attaching the logs. https://s3-eu-west-1.amazonaws.com/my-private-cloud-bucket/ami.log_url.gz https://s3-eu-west-1.amazonaws.com/my-private-cloud-bucket/ami.log_no_url.gz

[mlococo]

@ltagliamonte Merged, thanks for your contribution.