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A container is a process that runs on the Photon OS host with its own isolated application, file system, and networking.
Photon OS includes the open source version of Docker. With Docker, Photon OS becomes a Linux run-time host for containers, that is, a Linux cloud container.
The full version of Photon OS includes Kubernetes so you can manage clusters of containers.
On Photon OS, the Docker daemon is enabled by default. To view the status of the daemon, run the following command:
systemctl status docker
Docker is loaded and running by default on the full version of Photon OS. On the minimal version, it is loaded but not running by default. To start it, run the following command:
systemctl start docker
To obtain information about Docker, run the following command as root:
docker info
After Docker is enabled and started, you can create a container. For example, run the following docker command as root to create a container running Ubuntu 14.04 with an interactive terminal shell:
docker run -i -t ubuntu:14.04 /bin/bash
Photon OS also enables you to run a docker container that runs Photon OS:
docker run -i -t photon /bin/bash
The Kubernetes package provides several services: kube-apiserver, kube-scheduler, kube-controller-manager, kubelet, kube-proxy. These services are managed by systemd. Their configuration resides in a central location: /etc/kubernetes.
For more information, see Running Kubernetes on Photon OS.