At rate any, yes, that running "yum update puppetserver" followed by "yum
downgrade puppetserver-2.4.0-1.el7" without any other precautions may hose
the CRL seems like it deserves mention.

On Thu, Aug 18, 2016 at 2:08 PM, Jeremy Barlow <jeremy.bar...@puppet.com>
wrote:

>
> On Thursday, August 18, 2016 at 9:53:37 AM UTC-7, Ben West wrote:
>>
>> The configuration for running Open Source puppetserver with an external
>> CA changed in v2.4 -> v2.5, explained in more detail here:
>> https://docs.puppet.com/puppetserver/latest/bootstrap_upgrad
>> e_notes.html#cacfg
>>
>> If you happen to run yum upgrade (presumably similar results with apt-get
>> update), the package's upgrade process for v2.4 -> v2.5 will actually
>> delete any existing copy of /etc/puppetlabs/puppetserver/bootstrap.cfg.
>> Which is reasonable.
>>
>
> If you have made modifications to the bootstrap.cfg file before the
> upgrade, I think (at least on systems which use yum) that the upgrade will
> additionally store a backup copy of the file to
> /etc/puppetlabs/puppetserver/bootstrap.cfg.rpmsave.
>
>
>>
>> HOWEVER, if you try to downgrade puppetserver to roll back, e.g. "yum
>> downgrade puppetserver-2.4.0-1.el7," the package downgrade process will
>> overwrite /etc/puppetlabs/puppet/ssl/crl.pem and break your
>> Puppetserver's SSL. Which isn't particularly reasonable.
>>
>>
> I don't think it's the "yum downgrade" itself which does this.  The
> puppetserver service, when running in a standard (non-external CA) setup
> has logic in it which, at startup, will try to copy over the file
> configured for the hostcrl
> <https://docs.puppet.com/puppet/latest/reference/configuration.html#hostcrl>
> setting with the file configured for the cacrl
> <https://docs.puppet.com/puppet/latest/reference/configuration.html#cacrl>
> setting.  It does this to ensure that the CRL file used by puppetserver's
> web server reflects the latest updates that have may have been done to the
> cacrl file since the last startup.  This file synchronization does not
> occur in the "external CA" configuration, though, since the cacrl file is
> not used in that case.  My guess is that after downgrade, the original
> bootstrap.cfg file from the puppetserver-2.4.0 package was reinstalled,
> re-enabling the standard CA service and, therefore, the CRL file
> synchronization logic.
>
> I think you might have been able to avoid having the CRL file overwritten
> if you had copied the file at 
> /etc/puppetlabs/puppetserver/bootstrap.cfg.rpmsave
> back to /etc/puppetlabs/puppetserver/bootstrap.cfg before the downgrade.
> In that case, I think the disabled CA service would continue to be used
> when the puppetserver-2.4.0 service had been restarted.  Does that make
> sense?
>
>
>
>> Options for fixing are A) restore crl.pem from backup, B) restore crl.pem
>> from the CA's ca_crl.pem file (if it is also a puppetserver), or C) to
>> regenerate all of your puppet SSL certs.
>>
>> Possible to add mention this downgrade pitfall in the Puppetserver v2.5.0
>> release notes?
>> https://docs.puppet.com/puppetserver/2.5/release_notes.html
>>
>
> Yeah, I think we could add some more detail to the release notes about
> this case.  I definitely think the best way to manage through these issues
> is to ensure that the disabled (external) CA service continues to be used
> before upgrade, after upgrade, and (if applicable) after downgrade.  The
> release notes do try to cover the best way to prepare for keeping the
> disabled CA service in place on upgrade - putting the ca.cfg file in place,
> as you mentioned.  Maybe a little more detail on the same for a downgrade
> could be helpful.
>
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-- 
Ben West
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