Immfly Infra Test

The goal of this test is to deploy a simple "clock" web application (frontend + backend) in a virtual machine using ansible.

Assets provided

• debian10-ssh.img.tar.xz: Compressed disk image of a virtual machine. This can be downloaded from this link
• vm.xml: Virtual machine XML definition for libvirt
• rsa: Authorized RSA key for accessing the virtual machine
• index.html: Frontend clock application

Note about the VM:

• The virtual machine operating system is a Debian 10 with openssh-server and python3 installed.
• It will try to configure it's network interface via DHCP.
• In order to boot the virtual machine, configure the domain file ${PATH_TO_VM_DISK_FILE} at assets/vm.xml with the location where the virtual machine image was extracted.

    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='${PATH_TO_VM_DISK_FILE}'/>  <!-- change this -->
      <backingStore/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
    </disk>

Frontend application

Frontend is periodically calling at /clock endpoint (HTTP GET at port 80) to gather timestamp information from a backend that doesn't exists yet.

Backend application

Backend should be responding at path /clock and returning a unix timestamp like:

>>> import time
>>> print(time.time())
1622556914.9101567

Requirements

• Implement backend service (using any language/tech you love... or hate)
• Use ansible to deploy frontend and backend services inside the virtual machine.

If everything works, that is how it should look when accessing the virtual machine at port 80:

Extra points

• Proper ansible project structure
• Use docker to run ansible
• Use ssh-agent inside ansible container
• Run frontend and backend services using docker
• Backend application configurable using environment variables
• Don't run services as root
• Configure & deploy EVERYTHING using a single command, i.e: bash script

Deliverables

• A git repository with an ansible project, the backend application and all other scripts you needed.
• Documentation explaining:
  • How to setup the VM
  • How to run the playbooks
• Feedback: please, don't hesitate to write any thoughts you have about this test.

Send the repository url to joan.grau@immfly.com