testing-docker.md

Testing Docker configuration inside easy-jenkins

This procedure is used to verify the correct installation of Docker tools inside service myjenkins, a.k.a. the Jenkins master node.

Preparation

Install easy-jenkins from https://github.com/gmacario/easy-jenkins

Refer to preparation.md for details.

Step-by-step instructions

Configure project test_docker

• Browse ${JENKINS_URL}, then click New Item

  • Item name: test_docker
  • Type: Freestyle project

  then click OK.

• Inside the project configuration page, fill-in the following information:

  • Restrict where this project can be run: master
  • Build
    • Add build step > Execute shell
      • Command

#!/bin/bash -xe

id
pwd

docker --version
docker-compose --version
docker-machine --version || true

docker version
docker info
docker images
docker ps -a
docker volume ls
docker network ls

# EOF

then click Save

Build project test_docker

• Browse ${JENKINS_URL}/job/test_docker, then click Build Now

Result: SUCCESS

Inspect ${JENKINS_URL}/job/test_docker/lastBuild/console

Started by user anonymous
[EnvInject] - Loading node environment variables.
Building on master in workspace /var/jenkins_home/jobs/test_docker/workspace
[workspace] $ /bin/bash -xe /tmp/hudson2149809609450450021.sh
+ id
uid=0(root) gid=0(root) groups=0(root)
+ pwd
/var/jenkins_home/jobs/test_docker/workspace
+ docker --version
Docker version 1.10.1, build 9e83765
+ docker-compose --version
docker-compose version 1.6.0, build d99cad6
+ docker-machine --version
/tmp/hudson2149809609450450021.sh: line 8: docker-machine: command not found
+ true
+ docker version
Client:
 Version:      1.10.1
 API version:  1.22
 Go version:   go1.5.3
 Git commit:   9e83765
 Built:        Thu Feb 11 19:09:42 2016
 OS/Arch:      linux/amd64

Server:
 Version:      1.10.1
 API version:  1.22
 Go version:   go1.5.3
 Git commit:   9e83765
 Built:        Thu Feb 11 19:09:42 2016
 OS/Arch:      linux/amd64
+ docker info
Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: 1.10.1
Storage Driver: devicemapper
 Pool Name: docker-0:32-181-pool
 Pool Blocksize: 65.54 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: ext4
 Data file: /dev/loop0
 Metadata file: /dev/loop1
 Data Space Used: 305.7 MB
 Data Space Total: 107.4 GB
 Data Space Available: 47.65 GB
 Metadata Space Used: 729.1 kB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.147 GB
 Udev Sync Supported: false
 Deferred Removal Enabled: false
 Deferred Deletion Enabled: false
 Deferred Deleted Device Count: 0
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 WARNING: Usage of loopback devices is strongly discouraged for production use. Either use `--storage-opt dm.thinpooldev` or use `--storage-opt dm.no_warn_on_loop_devices=true` to suppress this warning.
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.90 (2014-09-01)
Execution Driver: native-0.2
Logging Driver: json-file
Plugins: 
 Volume: local
 Network: null host bridge
Kernel Version: 4.1.17-boot2docker
Operating System: Debian GNU/Linux 8 (jessie) (containerized)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 1.956 GiB
Name: 61d3e4cd8e76
ID: ZHXV:WTIC:XCQE:2M2S:XIMR:PYLQ:Z37D:CMFI:3AJI:7C5W:YROR:FB7X
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
+ docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
+ docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
+ docker volume ls
DRIVER              VOLUME NAME
Notifying upstream projects of job completion
Finished: SUCCESS

Notice that there are no containers inside this Docker engine - which means it is a different engine from the one where easy-jenkins services are running.

TODO: Do not use Docker-in-Docker for service myjenkins. See related #31