Operos

Operos is a Linux-based operating system that brings hyperscaler-grade infrastructure automation to organizations of all sizes: scheduled containers, software defined networking, and converged storage automatically provisioned on commodity x86 servers.

Operos combines a number of open source technologies into a single cohesive cloud-native platform:

• Kubernetes for container orchestration
• Ceph for distributed storage
• Calico for software-defined container networking
• Prometheus for metrics collection
• isc-dhcpd/NginX/SYSLINUX for hardware provisioning
• Arch Linux as the platform

In addition to the above, Operos includes several original components:

• Teamster and Prospector for node management
• Waterfront as an additional GUI
• A fast installer for provisioning controllers

For more information about Operos, see its home page.

Get Operos

The easiest way to get started with Operos is to download a binary ISO image:

Download the latest ISO binary here.

Read the installation instructions.

Building from source

1. Run make to build everything from scratch. See below for how to rebuild various parts of the system.

2. You should now see an installer ISO in the out directory.

Pre-requisites

• You will need the archlinux64 box for Vagrant. This can be created via: packer-arch.

    git clone [email protected]:elasticdog/packer-arch.git
    cd packer-arch
    ./wrapacker
    vagrant box add -f --name archlinux64 output/packer_arch_virtualbox.box 
  

Running the generated ISO

To run the ISO, create virtual machines in VirtualBox. You'll need one machine for the controller and one or more workers. The controller node needs at least 2GB of RAM and 2 CPUs. The worker nodes need 2GB of RAM and one CPU.

The controller should have at least two network interfaces:

• The first (external) interface should be connected externally. This can be done via bridged or NAT network types.
• The second one should be connected to a VirtualBox host-only network (e.g. vboxnet1). This will be used for cross-node communication. Disable any DHCP servers on this network (in VirtualBox settings) as the controller will run its own DHCP server.

The worker should have at least one network interface, connected to the same host-only network.

After the controller installed, the Kubernetes API can be accessed via the provided kubectl script (note that the kubectl binary must be installed on the machine). This script will automatically fetch the user credentials from the controller if this has not already been done.

Version number

• The version number is formatted as: x.y.z. The x.y portion is defined in the file operos-version. z is intended to be the build number in the CI system. This can be set via the make variable BUILD_NUM:

    make isobuild BUILD_NUM=123
  

  This value defaults to x, to indicate an unofficial build.

Docker image and Arch package cache

The Docker images and Arch packages used during builds are cached in the build tree. To refresh, use:

# Refresh Arch package cache
make packages
# Refresh Docker image cache
make images

The versions of Docker images to be used are specified in versions. The cache must be built at least once before running the build. It can also be rebuild any time to obtain the latest packages and images.

Rebuilding the ISO only

To rebuild only the ISO, skipping the cache updates, use:

make isobuild

Development build

There is a special, development build of the Operos ISO that can be built using:

make isobuild-dev

Differences between the development and production builds:

• An SSH key is automatically generated (keys/testkey[.pub]) and set as an authorized key on all nodes, controller and worker. This makes it easy to log into the nodes without having to enter a password, for example:

    ssh -i keys/testkey [email protected]
  

• When creating the images, gzip compression is used (instead of xz for production). This takes less time, but produces larger images.