Re: Purpose of instance_states in manifest?


Dmitriy Kalinin
 

`bosh download manifest` is meant to return what was send to the Director
at the time of the deploy. Certain values will be resolved such as release
and stemcell versions.

There was a bug that accidentally exposed instance_states key which is
internal to the Director. It was fixed in latest version of the Director.

On Wed, Aug 5, 2015 at 3:43 AM, Jones, Daniel <Daniel.Jones3(a)fil.com> wrote:

Hi all,



Two questions:

1. What is the intended use of `bosh download manifest`?

2. What is the purpose of instance_states in a manifest?



I ask as I did a `bosh download manifest` because I was too lazy to go and
find where the actual deployment manifest was kicking around on a server. I
knew there had been no changes, so was expecting it to return an identical
manifest to that which was used to create the deployment originally.



It was only upon closer inspection I noticed some “instance_states” fields
for particular jobs, where some of the values were “recreate”. This
figures, as I’d done at least one `bosh recreate` before the `bosh download
manifest`.



Is the intention of `bosh download manifest` to express the internal
desired state of a deployment in YAML form? Or is it intended to give one a
means to access a manifest for a deployment if the original is lost?



What does the “instance_states” field do? It seems a bit odd to have a
verb like “recreate” in a declarative configuration file. The source code
says
<https://github.com/cloudfoundry/bosh/blob/master/bosh-director/lib/bosh/director/deployment_plan/job.rb>
that these are virtual states, and I’m not really sure what the purpose of
them is.



Any and all information gratefully appreciated!





Regards,

Daniel Jones



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