Use a custom Vagrant box for direct-lvm support

[ironcladlou]

This change is to improve the single-VM developer experience. Currently, the changes are only for the VirtualBox provider. A new base box hosted on mirrors.openshift.com is used.

Changes between the old and new base box:

• A separate 20GB LVM volume group with a pair of direct-lvm logical volumes is configured for Docker use.
• Git, Docker, and Go are pre-installed as essential tools.
• The NAT adapter uses virt-io.
• The vagrant user is properly configured for password-less sudo and no-tty access.

Developer experience improvements:

• Time from zero to hacking improved (tested on a 2.5ghz i5 w/ 8GB RAM and SSD, assuming the box files are already downloaded and the VMs don't yet exist):

  Current:
   vagrant up:      6m
   build-images.sh: 5m47s (5min load avg: 0.86)
  
  New:
   vagrant up:      39s
   build-images.sh: 4m18s (5min load avg: 0.46)
  

• Docker is pre-configured to use direct-lvm and xfs for storage, improving performance by eliminating filesystem and network overhead caused by the direct-loop approach (resulting in reduced IO waits).

• Separate logical volume enables further experimentation with other storage approaches (e.g. btrfs) - just replace the volumes in the docker storage group while the VM is online and reconfigure docker (this could be incorporated into provisioner options).

• GOPATH is pre-created with /home/vagrant/go/{bin,src,pkg} which solves the Vagrant mount/provisioner chicken-and-egg problem when mounting a host GOPATH/src into the guest (previously, GOPATH was root-owned, preventing standard go usage within the VM).

[ironcladlou]

@smarterclayton independent tests performed by @pweil- and @jcantrill to verify it can come up from scratch (tested on OSX and fc20). Advice on any other testing that could be done?

[smarterclayton]

I'll give it a try as well, thanks for doing this.

[ironcladlou]

@bparees would you also be willing to try this, perhaps w/ the e2e tests?

[mfojtik]

LGTM, this improves the download speed for Vagrant image greatly and the Docker works noticeably faster. My build-images.sh is 3m41.854s. Great job!

[bparees]

worked for me as well (no performance data points collected)

[VojtechVitek]

LGTM and works for me. Thanks!

[smarterclayton]

Will merge on Monday if no one else hits issues

On Oct 24, 2014, at 8:15 PM, Vojtech Vitek notifications@github.com wrote:

LGTM and works for me. Thanks!

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[smarterclayton]

LGTM [merge]

[openshift-bot]

Origin Merge Results: SUCCESS (https://ci.openshift.redhat.com/jenkins/job/merge_pull_requests_openshift3/254/) (Image: devenv-fedora_279)

[openshift-bot]

Evaluated for origin up to bf1f587