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Crowbar Development Based Upon SUSE

Here we describe how to setup a Crowbar development environment in a virtual machine (VM) that is based on openSUSE or SUSE Linux Enterprise Server (SLES). It is currently focused on the core Rails application and required barclamps.

Setting up the VM

We assume that you are using KVM and have read the KVM setup instructions. If not, setup the VM accordingly and continue on to the next section.

We assume your KVM host is the desktop you are working from, so adapt them if necessary.

Download the VM

Download the latest version of the Crowbar Dev VM from one of the following locations (KVM image in qcow2 format recommended):

Boot the VM

This can be done either via libvirt, or directly via qemu-kvm:

Booting via libvirt

Give the VM a name; this can be whatever you want.

    kvm-host# vm_name=crowbar-admin-sles

Set which bridge device you want to route the VM's NAT traffic through:

    kvm-host# bridge=virbr0

Register and boot the VM:

    kvm-host# vm-install \
                  -n $vm_name -o sles11 -c4 -m2048 -M2048 \
                  -d qcow2:$vm_disk,xvda,disk,w,0,cachemode=none \
                  -e \
                  --nic bridge=$bridge,model=virtio \
                  --keymap en-gb

(Note: the above applies for openSUSE 12.3. Older distributions may need tweaks, e.g. cache=none instead of cachemode=none.)

Of course you can tweak the number of virtual CPUs and amount of RAM in the above arguments if you want. It is not recommended to allocate less than 2GB of RAM to the VM.

Once the VM is registered with libvirt, you can later control it using virt-manager in the normal way.

Booting via qemu-kvm

  1. Place the image in the dev-setup/qemu-kvm directory of the Crowbar git checkout on your KVM host.

  2. [Optional] Set which bridge device you want to route the VM's NAT traffic through:

        kvm-host# export BRIDGE=virbr0

  3. Start the VM by running the following as root:

        kvm-host# ./start-vm

    Use the --preallocate option if you need to improve disk performance.

Post-boot

  1. [SLES VM only] Connect to the VM's graphical console to accept the end user license agreement (EULA). If you used qemu-kvm, connect via VNC, e.g.:

        kvm-host> vncviewer :10

    Otherwise you will already see the console, but you can also connect via virt-manager or vncviewer.

    Once connected, type q, y, and hit enter.

  2. After the VM boots up (takes a bit longer for first boot), you should be able to connect to the VM via SSH:

        kvm-host> ssh [email protected]            # Password is 'linux'

  3. [SLES only] If you're running the VM within the SUSE network, run add-suse-internal-repos to add the internal SUSE repositories. Otherwise, if you have a SLES subscription, register with NCC to get updates.

  4. Create a non-root user account and set the password. Use the same username as you do on your regular workstation for convenience. Then re-login to the dev VM as the newly created user, e.g.:

        root@crowbar-dev> useradd -m jamestyj
    root@crowbar-dev> passwd jamestyj
    root@crowbar-dev> logout
    jamestyj@kvm-host> ssh 192.168.124.10
    jamestyj@crowbar-dev>

Setting Up the Development Environment

You should now have a working VM that you can SSH into from the qemu-kvm host.

  1. Copy your .gitconfig and other configuration files to the VM. For example:

        crowbar-dev> scp -r <your-usual-dev-host>:.{gitconfig,vimrc,vim,profile,ssh} .

  2. Check out the Crowbar git repo and run the dev tool:

         crowbar-dev> git clone git://github.com/crowbar/crowbar.git
     crowbar-dev> cd crowbar
     crowbar-dev> ./dev setup

    The ./dev setup script will ask for your Github username and password. It will fork the Crowbar and corresponding barclamp repositories to your account and clone them into crowbar/barclamps/. See dev-and-workflow and dev-and-code-review for details.

  3. Now assemble the Crowbar application:

        crowbar-dev> ./dev tests setup --no-gem-cache

    This assembles a working and testable Crowbar Rails application in /tmp/crowbar-dev-test/opt/dell/crowbar_framework.

  4. Now you can run an instance of the web UI:

        crowbar-dev> cd /tmp/crowbar-dev-test/opt/dell/crowbar_framework
    crowbar-dev> bundle install
    crowbar-dev> bundle exec rake db:migrate
    crowbar-dev> bundle exec rails s puma

  5. And also to run the (unit + RSpec) tests:

         crowbar-dev> bundle exec rake db:drop railties:install:migrations db:migrate db:fixtures:dump test:units spec

See the testing page for details.

Troubleshooting Tips

  1. Connect to the VM via VNC. This is useful for debugging the VM (e.g., networking issues).

        kvm-host> vncviewer :10

    The VM is configured with the following settings:

        IP address: 192.168.124.10
    Netmask:    255.255.255.0
    Gateway:    192.168.124.1
    DNS:        10.120.2.88, 8.8.8.8

    You may need to update the DNS setting to match your environment by modifying /etc/resolv.conf.