aeolus-devel March 2013

aeolus-devel@lists.fedorahosted.org

19 participants
13 discussions

moving wiki content
by Mo Morsi 19 Jun '13

19 Jun '13

On the website mtg today we discussed moving the redmine wiki content to the individual github wiki's. Matt mentioned we have the capability to mass migrate redmine pages to github wiki pages so we're asking each individual subcommunity which pages they would like to be migrated to their wiki. The overall binding content will be moved to a combination of the conductor wiki and the aeolusproject.org github site wiki. The later isn't the best fit for the content (though alot of the content should go in the conductor wiki) but its the best option that we currently see atm. We threw around the idea of a mediawiki installation but as Matt mentioned we previously had one (got littered with spam) and none of us felt the effort of setting one up was worth the cycles atm (can be revisited in the future). If anyone has any additional suggestions, feel free to shout out here. We are looking at mid January as the cutoff date for this migration. We ask that a representative of each indivual subcommunity (deltacloud, imagefactory, oz, Tim, Heat, conductor, configure, aeolus-cli, and audrey) start looking at the redmine wiki and send us a list of the pages they want migrated. If you could send this to us by mid December that would be more than appreciated. Alternatively just migrate the wiki content you would like and just tell us (don't worry, we will find other things todo ;-) ). We will keep the redmine wiki around after the end of January in read only mode for historical / archival purposes. Though at some point in the far future we most likely will shut it down for good. -Mo

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Aeolus Project Names
by Martyn Taylor 28 Mar '13

28 Mar '13

<winge> Gents, I know we all had a bit of fun coming up with weird and wonderful names when we were looking to rename IME (or now Tim). But seriously... are we actually going to call our projects things like Gablestablerfahrer, WingedMonkey and alike? I'm all for avoiding boring names like IME and EVM (no offence MIQ) but surely there is some middle ground to be had here? We should at least make an effort to name our projects to roughly describe what they actually do? </winge>

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Tip: better_errors and RailsPanel (Chrome) Railscast
by Matt Wagner 22 Mar '13

22 Mar '13

Howdy fellow developers, A while back Petr had sent an email here about the immensely-useful better_errors gem. I just bumped into a Railscast that covers better_errors, and also a neat Chrome extension called RailsPanel that lets you drill into requests to a Rails app. http://railscasts.com/episodes/402-better-errors-railspanel (Jump to 5:45 or so if you're already familiar with better_errors.) This is actually a few months old, so apologies if you've already seen this. But I thought it was pretty nifty. RailsPanel itself is here: https://github.com/dejan/rails_panel -- Matt

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[aeolus-incubator/tim] 1d8662: Added TargetImage Delete functionality
by Jason Guiditta 22 Mar '13

22 Mar '13

Branch: refs/heads/master Home: https://github.com/aeolus-incubator/tim Commit: 1d86624f19b87c61ca269760db6044246aa2d5ae https://github.com/aeolus-incubator/tim/commit/1d86624f19b87c61ca269760db60… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-22 (Fri, 22 Mar 2013) Changed paths: A app/exceptions/tim/error/exceptions.rb R app/exceptions/tim/exceptions.rb M app/models/tim/provider_image.rb M app/models/tim/target_image.rb A app/models/tim/target_image_observer.rb M app/patches/rails/active_resource/delete_with_content_body.rb M app/state_machine/tim/state_machine/provider_image/fsm_create.rb A app/state_machine/tim/state_machine/target_image/fsm_create.rb A app/state_machine/tim/state_machine/target_image/fsm_delete.rb A image_factory/exceptions/image_factory/exceptions.rb b/lib/image_factory/exceptions/image_factory/exceptions.rb M lib/tim/engine.rb M spec/controllers/provider_images_controller_spec.rb M spec/controllers/target_images_controller_spec.rb M spec/models/observers/provider_image_observer_spec.rb A spec/models/observers/target_image_observer_spec.rb M spec/models/provider_image_spec.rb M spec/models/target_image_spec.rb M test/dummy/app/models/provider_account.rb Log Message: ----------- Added TargetImage Delete functionality Commit: c940c3d6a4cc0ae9db06d988faa265704fd2740d https://github.com/aeolus-incubator/tim/commit/c940c3d6a4cc0ae9db06d988faa2… Author: jguiditta <jguiditt(a)redhat.com> Date: 2013-03-22 (Fri, 22 Mar 2013) Changed paths: A app/exceptions/tim/error/exceptions.rb R app/exceptions/tim/exceptions.rb M app/models/tim/provider_image.rb M app/models/tim/target_image.rb A app/models/tim/target_image_observer.rb M app/patches/rails/active_resource/delete_with_content_body.rb M app/state_machine/tim/state_machine/provider_image/fsm_create.rb A app/state_machine/tim/state_machine/target_image/fsm_create.rb A app/state_machine/tim/state_machine/target_image/fsm_delete.rb A image_factory/exceptions/image_factory/exceptions.rb b/lib/image_factory/exceptions/image_factory/exceptions.rb M lib/tim/engine.rb M spec/controllers/provider_images_controller_spec.rb M spec/controllers/target_images_controller_spec.rb M spec/models/observers/provider_image_observer_spec.rb A spec/models/observers/target_image_observer_spec.rb M spec/models/provider_image_spec.rb M spec/models/target_image_spec.rb M test/dummy/app/models/provider_account.rb Log Message: ----------- Merge pull request #117 from mtaylor/fsm_target_image Fsm target image Compare: https://github.com/aeolus-incubator/tim/compare/c673528a8aa9...c940c3d6a4cc

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[aeolus-incubator/tim] e93b91: Add delete body support to Net::HTTP and ARes
by Jason Guiditta 22 Mar '13

22 Mar '13

Branch: refs/heads/master Home: https://github.com/aeolus-incubator/tim Commit: e93b91399a00a618bfe0d23d907815c457a40def https://github.com/aeolus-incubator/tim/commit/e93b91399a00a618bfe0d23d9078… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-14 (Thu, 14 Mar 2013) Changed paths: A app/patches/rails/active_resource/delete_with_content_body.rb Log Message: ----------- Add delete body support to Net::HTTP and ARes Commit: a5b748eb25144dda60abbd1261d5181c7020ab24 https://github.com/aeolus-incubator/tim/commit/a5b748eb25144dda60abbd1261d5… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-20 (Wed, 20 Mar 2013) Changed paths: M app/models/tim/provider_image.rb M app/models/tim/provider_image_observer.rb M app/patches/rails/active_resource/delete_with_content_body.rb M app/state_machine/tim/state_machine/fsm.rb M app/state_machine/tim/state_machine/provider_image/fsm_create.rb A app/state_machine/tim/state_machine/provider_image/fsm_delete.rb M spec/controllers/provider_images_controller_spec.rb A spec/factories/dummy/provider_account.rb M spec/factories/tim/provider_image.rb M spec/models/dummy/pool_family_spec.rb R spec/models/dummy/provider_account_spec.rb M spec/models/observers/provider_image_observer_spec.rb M test/dummy/app/models/provider_account.rb Log Message: ----------- Added Delete Provider Image FSM Support Commit: c673528a8aa9dce67a2981ea2c899ae3a32e66a3 https://github.com/aeolus-incubator/tim/commit/c673528a8aa9dce67a2981ea2c89… Author: jguiditta <jguiditt(a)redhat.com> Date: 2013-03-22 (Fri, 22 Mar 2013) Changed paths: M app/models/tim/provider_image.rb M app/models/tim/provider_image_observer.rb A app/patches/rails/active_resource/delete_with_content_body.rb M app/state_machine/tim/state_machine/fsm.rb M app/state_machine/tim/state_machine/provider_image/fsm_create.rb A app/state_machine/tim/state_machine/provider_image/fsm_delete.rb M spec/controllers/provider_images_controller_spec.rb A spec/factories/dummy/provider_account.rb M spec/factories/tim/provider_image.rb M spec/models/dummy/pool_family_spec.rb R spec/models/dummy/provider_account_spec.rb M spec/models/observers/provider_image_observer_spec.rb M test/dummy/app/models/provider_account.rb Log Message: ----------- Merge pull request #113 from mtaylor/fsm_delete Fsm delete Compare: https://github.com/aeolus-incubator/tim/compare/fbb7b3a53ff5...c673528a8aa9

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ActiveRecord callbacks
by Martyn Taylor 18 Mar '13

18 Mar '13

All, I recently ran into a bit of a trap with ActiveRecord when using callbacks and a rails console. It's not totally obvious how callbacks work, so I thought I'd write it up so others don't fall into the same issues. It's easiest to explain this with an example: lets say we have two classes a user model and a model observer: class User < ActiveRecord::Base # has string field called name. end class UserObserver < ActiveRecord::Observer def after_create user u = User.find(user.id) u.name = "foo" u.save end end We'll start the rails server and then open up console to issue some commands. Now let's create a new user: u = User.create What would you expect to happen in this case? If you think that: 1. User is persisted 2. after_create event triggered 3. user is found and name set to "foo" 4. user is saved Then you thought the same as me and would be right... at least some of the time. What actually happens is the following: 1. User persistence is triggered and a database transaction initialized Split a, b: 2a. after_create event triggered 3a. user is looked up and name set to "foo" 3a. user is saved 2b. transaction commits or does a roll back In most cases the transaction will commit or roll back pretty much straight away and we'll see our original expected behaviour. However, in some cases the callback will execute before the transaction is complete. In our example this would result in a RecordNotFound exception. Since the the database entry does not exist when our observer tries to do the lookup for the user record. Now, a point to note here: I've not actually tested this using a single rails session (i.e. having just the server or just the console running). I am assuming (though I do need to find out) that there is some cache at or around the persistence layer which stores our original user object, and returns it when we do User.find(:id). This would happen without touching the db and therefore we'll not see a RecordNotFound error). However, we should at least be aware of the actual behaviour above, since it may well be that other sessions are used for rake tasks or general administration. So, how to do we deal with the transactions issues. Well as of rails 3.x ActiveRecord now have 2 extra callbacks events :after_commit and :after_rollback. These are used to ensure that the callback is fired after our transaction has completed (and our record actually exists or is updated in the database). These events can also be scoped to the standard callbacks, so they fire only on :create, :update etc... after_commit :do_foo,:on => :create after_commit :do_bar,:on => :update after_commit :do_baz,:on => :destroy However, there isn't any obvious way (at least from what I gather) to scope these events in the observer. So, I created a generic after_commit callback, and do the check for :create/:update myself. This is less than ideal, I'm hoping there is (or will be soon) a better method for doing this. Updated observer example: class UserObserver < ActiveRecord::Observer def after_commit user # check to see if this is a create event if user.created_at == updated_at u = User.find(user.id) u.name = "foo" u.save end end end So, it's worth bearing in mind this behaviour when using callbacks and you won't do what I originally did and start cursing sqlite :p. Anyways... Hope you found this useful and if any of you have a better idea on scoping the commit callbacks in observers, please let me know, it will be useful. For more info checkout: http://api.rubyonrails.org/classes/ActiveRecord/Transactions/ClassMethods.h… Regards Martyn

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[aeolus-incubator/tim] 07b2e6: Added Transition Observer
by Jason Guiditta 13 Mar '13

13 Mar '13

Branch: refs/heads/master Home: https://github.com/aeolus-incubator/tim Commit: 07b2e60ce931547392ac5512f302a69ba4a3cdc3 https://github.com/aeolus-incubator/tim/commit/07b2e60ce931547392ac5512f302… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-13 (Wed, 13 Mar 2013) Changed paths: R app/models/tim/fsm.rb M app/models/tim/provider_image.rb A app/models/tim/provider_image_observer.rb M app/models/tim/target_image.rb A app/state_machine/tim/state_machine/fsm.rb M lib/tim/engine.rb A spec/models/observers/provider_image_observer_spec.rb Log Message: ----------- Added Transition Observer Commit: e68d0135ffceccfa1013841c719449c84994bc60 https://github.com/aeolus-incubator/tim/commit/e68d0135ffceccfa1013841c7194… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-13 (Wed, 13 Mar 2013) Changed paths: M app/models/tim/provider_image_observer.rb M app/state_machine/tim/state_machine/fsm.rb M spec/models/observers/provider_image_observer_spec.rb Log Message: ----------- renamed transitions to verbs Commit: 0870ae6b26d1c1c98b7b7c8c5f0940094de732ad https://github.com/aeolus-incubator/tim/commit/0870ae6b26d1c1c98b7b7c8c5f09… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-13 (Wed, 13 Mar 2013) Changed paths: M app/state_machine/tim/state_machine/fsm.rb Log Message: ----------- removed white space from fsm.rb Commit: 1a1852370b64bfc838e9a577495bd58e5bf9f17f https://github.com/aeolus-incubator/tim/commit/1a1852370b64bfc838e9a577495b… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-13 (Wed, 13 Mar 2013) Changed paths: M app/models/tim/provider_image_observer.rb A app/state_machine/tim/state_machine/provider_image/fsm_create.rb Log Message: ----------- Use Mixins for statemachine observer behaviour Commit: 896370d86dbefc12e1704590589f5e7fa7018665 https://github.com/aeolus-incubator/tim/commit/896370d86dbefc12e1704590589f… Author: Martyn Taylor <mtaylor(a)redhat.com> Date: 2013-03-13 (Wed, 13 Mar 2013) Changed paths: M app/state_machine/tim/state_machine/provider_image/fsm_create.rb Log Message: ----------- Added upcase check Commit: fbb7b3a53ff501591422e9f912e80b02fd0e8fb0 https://github.com/aeolus-incubator/tim/commit/fbb7b3a53ff501591422e9f912e8… Author: jguiditta <jguiditt(a)redhat.com> Date: 2013-03-13 (Wed, 13 Mar 2013) Changed paths: R app/models/tim/fsm.rb M app/models/tim/provider_image.rb A app/models/tim/provider_image_observer.rb M app/models/tim/target_image.rb A app/state_machine/tim/state_machine/fsm.rb A app/state_machine/tim/state_machine/provider_image/fsm_create.rb M lib/tim/engine.rb A spec/models/observers/provider_image_observer_spec.rb Log Message: ----------- Merge pull request #109 from mtaylor/state_machine_observer Added Transition Observer Compare: https://github.com/aeolus-incubator/tim/compare/68edc38dee5c...fbb7b3a53ff5

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tdl-tools update
by Mo Morsi 13 Mar '13

13 Mar '13

Figure I'd send around an update regarding tdl-tools [1]. I have some content to demo at our next sprint recap, and plan to make a short screencast which I will format into a blog post w/ some content: As you may recall, tdl-tools is a set of tools to make building, testing, and deploying tdls (as used by imagefactory/oz) quick and easy. All in all the current tools are comprised of: - tdl-create: create a new tdl/etdl from scratch, includes an interactive mode - tdl-verify: verify the accuracy of your tdl on the command line - tdl-convert: convert an tdl/etdl and vice versa - tdl-launch: start a new instance w/ deltacloud and process the tdl on it, great for quickly testing tdl's - tdl-apply : simple command to proxy tdl's between cloud instance and image services, specify tdl via cmd line w/ flag indicating whether to use tdl-launch/deltacloud or imagefactory to handle the tdl. - tdl-config: creates a new config file in the user's home dir containing cloud credentials (which the user will be prompted for) to be used by tdl-apply to pass onto deltacloud/imagefactory I also would like to incorporate a '--server' flag in tdl-apply to provide a simple sinatra based web-service which to also serve this proxy over http. These commands are all currently available via the 'tdl' gem on rubygems.org [2], simply 'gem install tdl' and invoke them on the command line. -Mo [1] https://github.com/aeolus-incubator/tdl-tools [2] https://rubygems.org/gems/tdl

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Event Report
by nitesh narayan lal 12 Mar '13

12 Mar '13

Hi, I had taken a talk and covered following topics : - Getting started with Qt development - Contribution to Fedora - Introduction to Aeolus project at *Jamia Millia Islamia College of Enginnering* [1], Delhi , India on Saturday, March 9th , 2013. My talk was one of the several talks under Jamia Dev Days [2] The participants were mostly Btech students . They were familiar with basic programming language practices mostly with C/C++ and quite a few of them had a prior experiencing of using Linux. In the first part of my talk I had covered the following topics : - What is Qt - How to start learning Qt - How to approach a GUI application using Qt In the second part I mostly covered things like - What is Fedora - Using Fedora - How to contribute - Where to ask for help and so on In the last part of my talk I had given them information about : - Cloud computing - Aeolus project - My contribution to Aeolus project - How they could contribute to Aeolus project . Thanks to JMI LUG [3] for their help in organizing this wonderful talk. [1] Jamia Millia Islamia University : http://jmi.ac.in/ [2] JamiaDevDaysFacebookPage:https://www.facebook.com/JDevDay [3] JMI LUG : http://www.jmilug.org/cms/ Regards Nitesh Narayan Lal https://fedoraproject.org/wiki/User:Niteshnarayan

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ANNOUNCE: Oz 0.10.0 Release
by Chris Lalancette 09 Mar '13

09 Mar '13

All, I'm pleased to announce release 0.10.0 of Oz. Oz is a program for doing automated installation of guest operating systems with limited input from the user. Release 0.10.0 is a bugfix and feature release for Oz. Some of the highlights between Oz 0.9.0 and 0.10.0 are: * Support for installing OpenSUSE 12.1 and 12.2 * Support for python3 * Support for Ubuntu 12.04.1, 12.04.2, and 12.10 * Fix up <command> ordering so that commands are run in the order they are specified in the XML * Updates and fixes to the documentation * Increase the shutdown timeout to support slower qemu guests * Add a default screenshot directory as /var/lib/oz/screenshots * Support for RHEL 5.9 * Support for Fedora 18 * Switch over to pycurl for header information; this allows http authentication to work * Switch to using the libvirt built-in screenshot mechanism. This removes the gvnc dependency and makes screenshots more reliable, but requires libvirt 0.9.7 or newer * Delete auto-generated ssh keys after customization A tarball of this release is available, as well as packages for Fedora-17. Instructions on how to get and use Oz are available at http://github.com/clalancette/oz/wiki . If you have questions or comments about Oz, please feel free to contact me at clalancette(a)gmail.com, or open up an issue on the github page: http://github.com/clalancette/oz/issues . Thanks to everyone who contributed to this release through bug reports, patches, and suggestions for improvement. Chris Lalancette

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aeolus-devel March 2013