Why does discovery-gce need write permissions

According to this https://www.elastic.co/guide/en/elasticsearch/plugins/6.3/discovery-gce-usage-long.html
we need to give write permissions to the instance.

Can someone tell me why it needs write permissions?

AWS counterpart plugin just requires ListInstances permission. I would like to know what is different w.r.t GCP


I don't remember TBH. May be read is enough but I think that last time I tried it did not work. Did you try it?

I took it for granted since the documentation says it, but I just tested it now. It works with read only permissions also.
Maybe, the documentation needs an update.


Great! Wanna contribute to the project and propose a PR for this?

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I am just getting started with GCP, I am not sure if my knowledge would be sufficient to update the docs.
But, I will take a look at it and see, I guess this is the place to contribute?


It is!


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