Having the ability to run scripts before and after all of the main vcld
stages would be useful and provide a great deal of flexibility. There are
several stages where a pre_<stage> and/or post_<stage> script would be
handy. The ones I can think of offhand are (including what's currently
available):
- post_load
- after OS is loaded and basic configuration is complete
- before user accounts are added
- pre_reserve
- before user accounts are added
- similar to post_load but would be triggered if a computer was
preloaded
- post_reserve
- after user accounts are added
- post_grant_access
- after firewall is configured and locked down
- pre_sanitize
- after timeout occurs where user didn't log in
- before user accounts are removed
- could be used to revert changes related to user accounts such as
removing them from some external group or revoking some sort of license
token specific to a user
- not called if computer is to be reloaded
- post_sanitize
- after user accounts are removed and firewall is locked back down
- not called if computer is to be reloaded
- could possibly be used for additional cleanup
- post_reload
- just prior to the end of processing a reload request not tied to a
user reservation
- post_reservation
- just prior to the end of a user reservation
- pre_capture
- before vcld's pre_capture subroutine is executed
- post_server_modify
- after server reservation accounts are modified
- may need to do something for every user account added/removed
- pre_reload
- run prior to a computer being reloaded
- could be used to remove a computer from an AD domain
I had started working on a related issue some time ago:
https://issues.apache.org/jira/browse/VCL-564
The difference between VCL-564 and this topic is that VCL-564 is admin
controlled versus image creator controlled. VCL-564 would provide
functionality to store scripts under the management node's tools directory
and have them automatically copied to images of a given OS without having
to save new revisions. Both VCL-760 and VCL-564 are desirable. I think
that the stage and script names are used for one should match the other.
On a related note, I think I may have been the one who regrettably chose
/etc/init.d for the directory of these scripts. This is not a proper
directory as /etc/init.d should only contain service control scripts. I
would like to change the recommended directory to something like
/usr/local/vcl, but leave in backwards compatibility so the existing
scripts run. Thoughts?
-Andy
On Wed, May 14, 2014 at 10:35 AM, Aaron Peeler <[email protected]> wrote:
> Hi Dev community.
>
> Regarding this jira issue.
> https://issues.apache.org/jira/browse/VCL-760
>
> Recently we had a need to do some post action on an image/environment
> after the reservation had completed. Also think there had been some
> previous requests for similar action.
>
> Sdding a vcl_post_reservation script option would address this easily.
> This would be similar to the vcl_post_load and vcl_post_reserve
> scripts detailed here: http://vcl.apache.org/docs/vclPostScripts.html
>
> While inserting the code for this. I was thinking if other vcl states
> need to also run this vcl_post_reservation script. Like the timeout
> case.
>
> i.e. A user makes a reservation, hits the connect button but does not
> connect to the machine. In normal reservations the machine does not
> get reloaded, the OS is just sanitized. Does it make sense to also run
> a vcl_post_reservation script here (if it exists in the image)?
>
> Thoughts if any?
> If none, I'll just proceed to only trigger the vcl_post_reservation
> script (if exists) for reservations that proceeded into the inuse
> state or are considered dirty.
>
> Thanks,
> Aaron
>
>
> On Tue, May 13, 2014 at 2:18 PM, Aaron Peeler (JIRA) <[email protected]>
> wrote:
> > Aaron Peeler created VCL-760:
> > --------------------------------
> >
> > Summary: add a vcl post reservation script
> > Key: VCL-760
> > URL: https://issues.apache.org/jira/browse/VCL-760
> > Project: VCL
> > Issue Type: Improvement
> > Components: vcld (backend)
> > Reporter: Aaron Peeler
> > Priority: Minor
> > Fix For: 2.3.3, 2.4
> >
> >
> > add a call to a vcl_post_inuse script that if existed could be run when
> a reservation is ended or over. The script is to be similar to the
> vcl_post_load and vcl_post_reserve scripts.
> >
> > Possible use case is to unregister a machine from a larger service
> before turning off / reloading.
> >
> >
> >
> > --
> > This message was sent by Atlassian JIRA
> > (v6.2#6252)
>
>
>
> --
> Aaron Peeler
> Program Manager
> Virtual Computing Lab
> NC State University
>
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