Build VM for Devstack

I posted already about diskimage-builder and Docker integration. This is a follow-up post about it and Everything-as-a-code approach. Since it takes more time than expected (honestly, I didn’t to any estimations but it seems that it could be done faster), I’ll post you some tips I use for my development environment automation even if it’s not a production-ready solution, but it already could be used if somebody needs it.

Almost any work with upstream OpenStack starts with VM setup with Devstack and required configuration. That’s mean even small automation of routine tasks will make me a bit more happy:).

First of all, I created a few really simple diskimage-builder elements to clone Devstack and configure VM hostname:

├── devstack
│   └── install.d
│       └── 10-clone-devstack
└── hostname
    └── install.d
        └── 10-set-hostname

I don’t know if there is a better solution, but it’s good enough for me now.

NOTE: don’t forget to add executable flag chmod +x 10-clone-devstack to get this working.

‘hostname element’ contains one, hardcoded for now, line: echo dsvm00 > /etc/hostname. It’s better to pass environment variable with hostname and I’ll do it in the next version.

‘devstack element’ just clones devstack sources:

mkdir -p /opt/stack
git clone /opt/stack/devstack

That’s all. Now I’m ready to build VM image:

disk-image-create -o ubuntu \
vm ubuntu openssh-server local-config devuser hostname devstack

I’m using ‘ubuntu’ instead of ‘ubuntu-minimal’ for more comfort. Once the image is built, I can start a new VM based on it:

sudo virt-install -n dsvm00 -r 8192 --os-type=linux  \
--os-variant=ubuntu16.04 --disk ubuntu.qcow2,device=disk,bus=virtio -w \
bridge=virbr0,model=virtio --vnc --noautoconsole --import

NOTE: do not forget to sudo apt install virtinst to get the command above working.


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