QA/Draft/Docker

Docker QA

Docker is a lightweight Operating System level virtualization, for more information please visit the Fedora Wiki Docker page or the upstream Docker Documentation.

Baseline Smoke Tests

Docker Is Installable

Docker should be able to be successfully installed.

$ dnf -y install docker

Should yield a system with docker installed.

$ rpm -q docker

Docker Storage Setup

The user should be able to run docker-storage-setup' succesfully after installing Docker.

$ journalctl -o cat --unit docker-storage-setup.service
$ lsblk

The output of the first command should resemble:

CHANGED: partition=2 start=411648 old: size=12171264 end=12582912 new: size=41531232,end=41942880
Physical volume "/dev/vda2" changed
1 physical volume(s) resized / 0 physical volume(s) not resized
Size of logical volume atomicos/root changed from 1.95 GiB (500 extents) to 4.00 GiB (1024 extents).
Logical volume root successfully resized
Rounding up size to full physical extent 24.00 MiB
Logical volume "docker-meta" created
Logical volume "docker-data" created

The lsblk command output should resemble:

NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
vda                       252:0    0   20G  0 disk 
├─vda1                    252:1    0  200M  0 part /boot
└─vda2                    252:2    0 19.8G  0 part 
  ├─atomicos-root         253:0    0    4G  0 lvm  /sysroot
  ├─atomicos-docker--meta 253:1    0   24M  0 lvm  
  └─atomicos-docker--data 253:2    0   10G  0 lvm

Docker Deamon Should be running

When installed, the docker daemon should be able to successfully start.

$ systemctl start docker.service

Should yeild a functioning (non-failed state) docker daemon.

$ systemctl status docker.service
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2016-04-18 11:18:40 CDT; 3 days ago
     Docs: http://docs.docker.com
 Main PID: 1404 (sh)
   CGroup: /system.slice/docker.service
           ├─1404 /bin/sh -c /usr/bin/docker daemon            $OPTIONS            $DOCKER_STORAGE_OPTIONS            $DOCKER_NETWORK_OPTIONS            $INSECURE_REGISTRY            2>&1 | /usr/bin/forward-journald -tag docker
           ├─1414 /usr/bin/docker daemon --selinux-enabled --log-driver=journald -G dockerroot --storage-opt dm.no_warn_on_loop_devices=true
           └─1415 /usr/bin/forward-journald -tag docker

Docker Can Pull Images

When the docker daemon has been started on a machine, the docker client on that same machine should be capable of pulling an image from a Registry.

The following pull operation should result without error:

$ sudo docker pull fedora 

Run the following command to run "Hello World" by means of Busybox:

$ sudo docker run fedora /bin/echo pass

The following text appears: pass