Automate Building your Own Atomic Host

Project Atomic hosts are built from standard RPM packages which have been composed into filesystem trees using rpm-ostree. This post provides method for automation of Building Atomic host (Creating new trees).

Requirements

• Fedora Atomic QCOW2 Image : Fedora-Atomic.
• Make sure that Ansible is installed on your system. Note that I am using Fedora-Workstation.

Process

Clone the Git repo on your working machine Build-Atomic-Host.

$ git clone https://github.com/trishnaguha/build-atomic-host.git
$ cd build-atomic-host

Create VM from the QCOW2 Image

The following creates VM from QCOW2 Image where username is atomic-user and password is atomic. Here atomic-nodein the instance name.

$ sudo sh create-vm.sh atomic-node /path/to/fedora-atomic25.qcow2
# For example: /var/lib/libvirt/images/Fedora-Atomic-25-20170131.0.x86_64.qcow2

Start HTTP Server

The tree is made available via web server. The following playbook creates directory structure, initializes OSTree repository and starts the HTTP server.

$ ansible-playbook httpserver.yml --ask-sudo-pass

Use ip addr to check IP Address of the HTTP server.

Give OSTree a name and add HTTP Server IP Address

Replace the variables given in vars/atomic.yml with OSTree name and HTTP Server IP Address.

For Instance:

# Variables for Atomic host
atomicname: my-atomic
httpserver: 192.168.122.1

Here my-atomic is OSTree name and 192.168.122.1 is HTTP Server IP Address.

Run Main Playbook

The following playbook installs requirements, starts HTTP Server, composes OSTree, performs SSH-setup and rebases on created Tree.

$ ansible-playbook main.yml --ask-sudo-pass

Check IP Address of the Atomic instance

The following command returns the IP Address of the running Atomic instance

$ sudo virsh domifaddr atomic-node

Reboot

Now SSH to the Atomic Host and reboot it so that it can reboot in to the created OSTree:

$ ssh atomic-user@<atomic-hostIP>
$ sudo systemctl reboot

Verify: SSH to the Atomic Host

Wait for 10 minutes, You may want to go for a Coffee now.

$ ssh atomic-user@192.168.122.221
[atomic-user@atomic-node ~]$ sudo rpm-ostree status
State: idle
Deployments:
● my-atomic:fedora-atomic/25/x86_64/docker-host
       Version: 25.1 (2017-02-07 05:34:46)
        Commit: 15b70198b8ec7fd54271f9672578544ff03d1f61df8d7f0fa262ff7519438eb6
        OSName: fedora-atomic

  fedora-atomic:fedora-atomic/25/x86_64/docker-host
       Version: 25.51 (2017-01-30 20:09:59)
        Commit: f294635a1dc62d9ae52151a5fa897085cac8eaa601c52e9a4bc376e9ecee11dd
        OSName: fedora-atomic

Now you have the Updated Tree.

Shout-Out for the following folks:

• Gerard Braad who mentored me for the project.
• Jonathon Lebon who demonstrated Building Atomic host workshop in DevConf.CZ, 2017 at Brno. His slides are here: jlebon-devconf-slides.

My future post will have customizing packages (includes addition/deletion) for OSTree.

PyCon India 2016

Heya! First of all I’m really sorry for such a delay with PyCon India 2016 blog post.

It was my first PyCon India. I have always wanted to attend such nice conference. But somehow I was probably going to miss it because of fund. It was only DGPLUG for which I could attend PyCon India 2016. They made sure about my travelling from Pune to Delhi and my accommodation. Have a look at 🙂 https://kushaldas.in/posts/dgplug-contributor-grant-recipient-trishna-guha.html.

DAY 1 started with Workshop and Openspace. I stayed in the Openspace since I didn’t buy ticket for workshop. I came to know about an useful project Ansible-Container from Shubham Miglani. We started hacking on the project. I also created an issue for the project but couldn’t work on the patch since the patch was already fixed and out with next release.

I met many of the faces whom I used to know on IRC/Twitter only. It was really exciting and my first day of the conference was over.

The main conference started from Day 2. It started with Keynote by Baishampayan Ghose. He gave a nice keynote on building bridges, distributed architecture and functional testing. Then the other talks carried on.  I was at the Red Hat and PyLadies booth most of the time.

We had a keynote by VanL as well about software design and failure which was great.

Many people came down with the interest about internship at Red Hat and joining PyLadies Community. We had DGPLUG + PyCon India Dinner at BBQ- Delhi later at night.

Day 3 started with Keynote by Andreas Muller on Machine Learning. Then multiple tracks talks carried on. I really enjoyed microservices talk by Ratnadeep Debnath. We had DGPLUG staircase meeting. There after we had open discussion on PyLadies – Diversity and FOSS community with Paul Everitt, Dmitry Filippov, VanL.

There was Red Hat sponsored talk by Kushal Das.

Oh yes I gave a short lightning talk on Project Atomic and Fedora Infrastructure Application Bodhi as well. The day ended with DGPLUG photo shoot.

We had dinner outside and headed back to Pune that night.

Below are the few photos I have :-).

For more photos visit: https://www.flickr.com/photos/sayanchowdhury/albums/72157674406421245

We are going to have another conference on Python really soon Pycon Pune 2017 :-).