1 .. This work is licensed under a Creative Commons Attribution 4.0 International License.
2 .. SPDX-License-Identifier: CC-BY-4.0
5 Pulling the Docker image
6 ------------------------
7 Pull the Functest Docker image ('opnfv/functest') from the public
8 dockerhub registry under the OPNFV account: [dockerhub_], with the
9 following docker command::
11 docker pull opnfv/functest:<TagIdentifier>
13 where <TagIdentifier> identifies a release of the Functest docker
14 container image in the public dockerhub registry. There are many tags
15 created automatically by the CI mechanisms, and you must ensure you
16 pull an image with the **correct tag** to match the OPNFV software
17 release installed in your environment. All available tagged images can
18 be seen from location [FunctestDockerTags_]. For example, when running
19 on the first official release of the OPNFV Danube system platform,
20 tag "danube.1.0" is needed. Pulling other tags might cause some
21 problems while running the tests.
22 Docker images pulled without a tag specifier bear the implicitly
23 assigned label "latest". If you need to specifically pull the latest
24 Functest docker image, then omit the tag argument::
26 docker pull opnfv/functest
28 After pulling the Docker image, check that it is available with the
29 following docker command::
31 [functester@jumphost ~]$ docker images
32 REPOSITORY TAG IMAGE ID CREATED SIZE
33 opnfv/functest latest 8cd6683c32ae 2 weeks ago 1.321 GB
34 opnfv/functest danube.1.0 13fa54a1b238 4 weeks ago 1.29 GB
35 opnfv/functest colorado.1.0 94b78faa94f7 9 weeks ago 968 MB
37 The Functest docker container environment can -in principle- be also
38 used with non-OPNFV official installers (e.g. 'devstack'), with the
39 **disclaimer** that support for such environments is outside of the
40 scope and responsibility of the OPNFV project.
42 Accessing the Openstack credentials
43 -----------------------------------
44 OpenStack credentials are mandatory and can be retrieved in different
45 ways. From inside the running Functest docker container the
46 "functest env prepare" command will automatically look for the
47 Openstack credentials file "/home/opnfv/functest/conf/openstack.creds"
48 and retrieve it unless the file already exists. This Functest
49 environment preparation step is described later in this document.
51 WARNING: When the installer type is "joid" you have to have the
52 credentials file inside the running container **before** initiating the
53 functest environment preparation. For that reason you have to choose
54 either one of the options below, since the automated copying does not
57 You can also specifically pass in the needed file prior to running the
58 environment preparation either:
60 * by using the -v option when creating the Docker container. This is
61 referred to in docker documentation as "Bind Mounting". See the
62 usage of this parameter in the following chapter.
63 * or creating a local file '/home/opnfv/functest/conf/openstack.creds'
64 inside the running container with the credentials in it. Consult
65 your installer guide for further details. This is however not
66 instructed in this document.
68 NOTE: When the installer type is "fuel" and virtualized deployment
69 is used, there you have to explicitly fetch the credentials file
70 executing the following sequence
72 #. Create a container as described in next chapter but do not
73 "Bind Mount" the credentials
74 #. Log in to container and execute the following command. Replace
75 the IP with installer address after the "-a" parameter::
77 $REPOS_DIR/releng/utils/fetch_os_creds.sh \
78 -d /home/opnfv/functest/conf/openstack.creds \
82 ( -d specifies the full path to the Openstack credential file
83 -i specifies the INSTALLER_TYPE
84 -a specifies the INSTALLER_IP
85 -v indicates a virtualized environment and takes no arguments )
87 #. Continue with your testing, initiate functest environment
88 preparation, run tests etc.
90 In proxified environment you may need to change the credentials file.
91 There are some tips in chapter: `Proxy support`_
93 Functest Docker parameters
94 --------------------------
95 This chapter explains how to run a container for executing functest
96 test suites. Numbered list below explains some details of the
97 recommended parameters for invoking docker container
99 #. It is a good practice to assign a precise container name through
100 the **--name** option.
102 #. Assign parameter for installer type::
104 -e "INSTALLER_TYPE=<type>"
105 # Use one of following apex, compass, fuel or joid
107 #. Functest needs to know the IP of some installers::
109 -e "INSTALLER_IP=<Specific IP Address>"
111 This IP is needed to fetch RC file from deployment, fetch logs, ...
112 If not provided, there is no way to fetch the RC file. It must be
113 provided manually as a volume
115 #. Credentials for accessing the Openstack.
116 Most convenient way of passing them to container is by having a
117 local copy of the credentials file in Jumphost and then using the
118 **-v** option. In the example we have local file by the name of
119 "overcloudrc" and we are using that as an argument::
121 -v ~/overcloudrc:/home/opnfv/functest/conf/openstack.creds
123 The credentials file needs to exist in the Docker container
124 under the path: '/home/opnfv/functest/conf/openstack.creds'.
126 **WARNING:** If you are using the Joid installer, you must pass the
127 credentials using the **-v** option:
128 -v /var/lib/jenkins/admin-openrc:/home/opnfv/functest/conf/openstack.creds.
129 See the section `Accessing the Openstack credentials`_ above.
131 #. Passing deployment scenario
132 When running Functest against any of the supported OPNFV scenarios,
133 it is recommended to include also the environment variable
134 **DEPLOY_SCENARIO**. The **DEPLOY_SCENARIO** environment variable
135 is passed with the format::
137 -e "DEPLOY_SCENARIO=os-<controller>-<nfv_feature>-<ha_mode>"
139 os = OpenStack (No other VIM choices currently available)
140 controller is one of ( nosdn | odl_l2 | odl_l3 | onos | ocl)
141 nfv_feature is one or more of ( ovs | kvm | sfc | bgpvpn | nofeature )
142 If several features are pertinent then use the underscore
143 character '_' to separate each feature (e.g. ovs_kvm)
144 'nofeature' indicates no NFV feature is deployed
145 ha_mode (high availability) is one of ( ha | noha )
147 **NOTE:** Not all possible combinations of "DEPLOY_SCENARIO" are
148 supported. The name passed in to the Functest Docker container
149 must match the scenario used when the actual OPNFV platform was
150 deployed. See release note to see the list of supported scenarios.
152 **NOTE:** The scenario name is mainly used to automatically detect
153 if a test suite is runnable or not (e.g. it will prevent ONOS test suite
154 to be run on ODL scenarios). If not set, Functest will try to run the
155 default test cases that might not include SDN controller or a specific
158 **NOTE:** A HA scenario means that 3 OpenStack controller nodes are
159 deployed. It does not necessarily mean that the whole system is HA. See
160 installer release notes for details.
163 Putting all above together, when using installer 'fuel' and an invented
164 INSTALLER_IP of '10.20.0.2', the recommended command to create the
165 Functest Docker container is as follows::
167 docker run --name "FunctestContainer" -it \
168 -e "INSTALLER_IP=10.20.0.2" \
169 -e "INSTALLER_TYPE=fuel" \
170 -e "DEPLOY_SCENARIO=os-odl_l2-ovs_kvm-ha" \
171 -v ~/overcloudrc:/home/opnfv/functest/conf/openstack.creds \
172 opnfv/functest /bin/bash
174 After the *run* command, a new prompt appears which means that we are inside
175 the container and ready to move to the next step.
177 For tips on how to set up container with installer Apex, see chapter
178 `Apex Installer Tips`_.
180 Finally, three additional environment variables can also be passed in
181 to the Functest Docker Container, using the -e
182 "<EnvironmentVariable>=<Value>" mechanism. The first two of these are
183 only relevant to Jenkins CI invoked testing and **should not be used**
184 when performing manual test scenarios::
186 -e "NODE_NAME=<Test POD Name>" \
187 -e "BUILD_TAG=<Jenkins Build Tag>" \
188 -e "CI_DEBUG=<DebugTraceValue>"
190 <Test POD Name> = Symbolic name of the POD where the tests are run.
191 Visible in test results files, which are stored
192 to the database. This option is only used when
193 tests are activated under Jenkins CI control.
194 It indicates the POD/hardware where the test has
195 been run. If not specified, then the POD name is
196 defined as "Unknown" by default.
197 DO NOT USE THIS OPTION IN MANUAL TEST SCENARIOS.
198 <Jenkins Build tag> = Symbolic name of the Jenkins Build Job.
199 Visible in test results files, which are stored
200 to the database. This option is only set when
201 tests are activated under Jenkins CI control.
202 It enables the correlation of test results,
204 are independently pushed to the results database
205 from different Jenkins jobs.
206 DO NOT USE THIS OPTION IN MANUAL TEST SCENARIOS.
207 <DebugTraceValue> = "true" or "false"
208 Default = "false", if not specified
209 If "true" is specified, then additional debug trace
210 text can be sent to the test results file / log files
211 and also to the standard console output.
215 Some specific tips are useful for the Apex Installer case. If not using
216 Apex Installer; ignore this section.
218 In case of Triple-O based installer (like Apex) the docker container
219 needs to connect to the installer VM, so it is then required that some
220 known SSH keys are present in docker container. Since the Jumphost root
221 SSH keys are already known, easiest way is to use those using the
222 'Bind mount' method. See below for sample parameter::
224 -v /root/.ssh/id_rsa:/root/.ssh/id_rsa
226 NOTE: You need the "sudo" when creating the container to access root
227 users ssh credentials even the docker command itself might not
230 HINT! In case of Triple-O installers you can find value for the
231 INSTALLER_IP parameter by executing command and note the returned IP
234 inst=$(sudo virsh list | grep -iEo "undercloud|instack")
235 sudo virsh domifaddr ${inst}
237 NOTE: In releases prior to Colorado, the name 'instack' was
238 used. Currently the name 'undercloud' is used.
240 You can copy the credentials file from the "stack" users home directory
241 in installer VM to Jumphost. Please check the correct IP from the
242 command above. In the example below we are using invented IP address
245 scp stack@192.168.122.89:overcloudrc .
247 Here is an example of the full docker command invocation for an Apex
248 installed system, using latest Functest docker container, for
249 illustration purposes::
251 sudo docker run -it --name "ApexFuncTestODL" \
252 -e "INSTALLER_IP=192.168.122.89" \
253 -e "INSTALLER_TYPE=apex" \
254 -e "DEPLOY_SCENARIO=os-odl_l2-nofeature-ha" \
255 -v /root/.ssh/id_rsa:/root/.ssh/id_rsa \
256 -v ~/overcloudrc:/home/opnfv/functest/conf/openstack.creds \
257 opnfv/functest /bin/bash
259 Compass installer local development env usage Tips
260 --------------------------------------------------
261 In the compass-functest local test case check and development environment,
262 in order to get openstack service inside the functest container, some
263 parameters should be configured during container creation, which are
264 hard to guess for freshman. This section will provide the guideline, the
265 parameters values are defaults here, which should be adjusted according
266 to the settings, the complete steps are given here so as not to appear
269 1, Pull Functest docker image from public dockerhub::
271 docker pull opnfv/functest:<Tag>
273 <Tag> here can be "brahmaputra.1.0", "colorado.1.0", etc.
274 Tag omitted means the latest docker image::
276 docker pull opnfv/functest
278 2, Functest Docker container creation
280 To make a file used for the environment, such as 'functest-docker-env'::
282 OS_AUTH_URL=http://172.16.1.222:35357/v2.0
286 OS_VOLUME_API_VERSION=2
287 OS_PROJECT_NAME=admin
288 INSTALLER_TYPE=compass
289 INSTALLER_IP=192.168.200.2
290 EXTERNAL_NETWORK=ext-net
292 Note: please adjust the content according to the environment, such as
293 'TENANT_ID' maybe used for some special cases.
295 Then to create the Functest docker::
297 docker run --privileged=true --rm -t \
298 --env-file functest-docker-env \
299 --name <Functest_Container_Name> \
300 opnfv/functest:<Tag> /bin/bash
302 3, To attach Functest container
304 Before trying to attach the Functest container, the status can be checked by::
308 to attach the 'Up' status Functest container and start bash mode::
310 docker exec -it <Functest_Container_Name> bash
312 4, Functest environemnt preparation and check
314 To see the Section below `Preparing the Functest environment`_.
316 Functest docker container directory structure
317 ---------------------------------------------
318 Inside the Functest docker container, the following directory structure
319 should now be in place::
347 Underneath the '/home/opnfv/' directory, the Functest docker container
348 includes two main directories:
350 * The **functest** directory stores configuration files (e.g. the
351 OpenStack creds are stored in path '/home/opnfv/functest/conf/openstack.creds'),
352 the **data** directory stores a 'cirros' test image used in some
353 functional tests and the **results** directory stores some temporary
355 * The **repos** directory holds various repositories. The directory
356 '/home/opnfv/repos/functest' is used to prepare the needed Functest
357 environment and to run the tests. The other repository directories
358 are used for the installation of the needed tooling (e.g. rally) or
359 for the retrieval of feature projects scenarios (e.g. promise)
361 The structure under the **functest** repository can be described as
367 |-- run_unit_tests.sh
369 |-- test-requirements.txt
373 | `--traffic-profile-guidelines.rst
376 | |-- config_install_env.sh
377 | `-- docker_remote_api
392 | |-- config_functest.yaml
393 | |-- config_patch.yaml
394 | |-- generate_report.py
398 | |-- tier_builder.py
399 | `-- tier_handler.py
404 | |-- functest-complete.sh
408 | |-- feature_base.py
409 | |-- pytest_suite_runner.py
410 | |-- testcase_base.py
428 |-- functest_logger.py
429 |-- functest_utils.py
431 |-- openstack_clean.py
432 |-- openstack_snapshot.py
433 |-- openstack_tacker.py
434 `-- openstack_utils.py
437 (Note: All *.pyc files removed from above list for brevity...)
439 We may distinguish several directories, the first level has 4 directories:
441 * **commons**: This directory is dedicated for storage of traffic
442 profile or any other test inputs that could be reused by any test
444 * **docker**: This directory includes the needed files and tools to
445 build the Funtest Docker image.
446 * **docs**: This directory includes documentation: Release Notes,
447 User Guide, Configuration Guide and Developer Guide.
448 * **functest**: This directory contains all the code needed to run
449 functest internal cases and OPNFV onboarded feature or VNF test cases.
451 Functest directory has 6 directories:
452 * **ci**: This directory contains test structure definition files
453 (e.g <filename>.yaml) and bash shell/python scripts used to
454 configure and execute Functional tests. The test execution script
455 can be executed under the control of Jenkins CI jobs.
456 * **cli**: This directory holds the python based Functest CLI utility
457 source code, which is based on the Python 'click' framework.
458 * **core**: This directory holds the python based Functest core
459 source code. Three abstraction classes have been created to ease
460 the integration of internal, feature or vnf cases.
461 * **opnfv_tests**: This directory includes the scripts required by
462 Functest internal test cases and other feature projects test cases.
463 * **tests**: This directory includes the functest unit tests
464 * **utils**: this directory holds Python source code for some general
465 purpose helper utilities, which testers can also re-use in their
466 own test code. See for an example the Openstack helper utility:
467 'openstack_utils.py'.
469 Useful Docker commands
470 ----------------------
471 When typing **exit** in the container prompt, this will cause exiting
472 the container and probably stopping it. When stopping a running Docker
473 container all the changes will be lost, there is a keyboard shortcut
474 to quit the container without stopping it: <CTRL>-P + <CTRL>-Q. To
475 reconnect to the running container **DO NOT** use the *run* command
476 again (since it will create a new container), use the *exec* or *attach*
479 docker ps # <check the container ID from the output>
480 docker exec -ti <CONTAINER_ID> /bin/bash
482 There are other useful Docker commands that might be needed to manage possible
483 issues with the containers.
485 List the running containers::
489 List all the containers including the stopped ones::
493 Start a stopped container named "FunTest"::
497 Attach to a running container named "StrikeTwo"::
499 docker attach StrikeTwo
501 It is useful sometimes to remove a container if there are some problems::
503 docker rm <CONTAINER_ID>
505 Use the *-f* option if the container is still running, it will force to
508 docker rm -f <CONTAINER_ID>
510 Check the Docker documentation dockerdocs_ for more information.
512 Preparing the Functest environment
513 ----------------------------------
514 Once the Functest docker container is up and running, the required
515 Functest environment needs to be prepared. A custom built **functest**
516 CLI utility is available to perform the needed environment preparation
517 action. Once the environment is prepared, the **functest** CLI utility
518 can be used to run different functional tests. The usage of the
519 **functest** CLI utility to run tests is described further in the
520 Functest User Guide `OPNFV_FuncTestUserGuide`_
522 Prior to commencing the Functest environment preparation, we can check
523 the initial status of the environment. Issue the **functest env status**
524 command at the prompt::
527 Functest environment is not installed.
529 Note: When the Functest environment is prepared, the command will
530 return the status: "Functest environment ready to run tests."
532 To prepare the Functest docker container for test case execution, issue
533 the **functest env prepare** command at the prompt::
537 This script will make sure that the requirements to run the tests are
538 met and will install the needed libraries and tools by all Functest
539 test cases. It should be run only once every time the Functest docker
540 container is started from scratch. If you try to run this command, on
541 an already prepared enviroment, you will be prompted whether you really
542 want to continue or not::
545 It seems that the environment has been already prepared.
546 Do you want to do it again? [y|n]
548 (Type 'n' to abort the request, or 'y' to repeat the
549 environment preparation)
552 To list some basic information about an already prepared Functest
553 docker container environment, issue the **functest env show** at the
557 +======================================================+
558 | Functest Environment info |
559 +======================================================+
560 | INSTALLER: apex, 192.168.122.89 |
561 | SCENARIO: os-odl_l2-nofeature-ha |
563 | GIT BRANCH: master |
564 | GIT HASH: 5bf1647dec6860464eeb082b2875798f0759aa91 |
565 | DEBUG FLAG: false |
566 +------------------------------------------------------+
568 +------------------------------------------------------+
572 INSTALLER: Displays the INSTALLER_TYPE value
574 and the INSTALLER_IP value
575 - here = "192.168.122.89"
576 SCENARIO: Displays the DEPLOY_SCENARIO value
577 - here = "os-odl_l2-nofeature-ha"
578 POD: Displays the value passed in NODE_NAME
580 GIT BRANCH: Displays the git branch of the OPNFV Functest
581 project repository included in the Functest
584 (In first official colorado release
585 would be "colorado.1.0")
586 GIT HASH: Displays the git hash of the OPNFV Functest
587 project repository included in the Functest
589 - here = "5bf1647dec6860464eeb082b2875798f0759aa91"
590 DEBUG FLAG: Displays the CI_DEBUG value
593 NOTE: In Jenkins CI runs, an additional item "BUILD TAG"
594 would also be listed. The value is set by Jenkins CI.
596 Finally, the **functest** CLI has a **--help** options:
600 functest --help Usage: functest [OPTIONS] COMMAND [ARGS]...
603 --version Show the version and exit.
604 -h, --help Show this message and exit.
613 Usage: functest env [OPTIONS] COMMAND [ARGS]...
616 -h, --help Show this message and exit.
619 prepare Prepares the Functest environment.
620 show Shows information about the current...
621 status Checks if the Functest environment is ready...
623 Checking Openstack and credentials
624 ----------------------------------
625 It is recommended and fairly straightforward to check that Openstack
626 and credentials are working as expected.
628 Once the credentials are there inside the container, they should be
629 sourced before running any Openstack commands::
631 source /home/opnfv/functest/conf/openstack.creds
633 After this, try to run any OpenStack command to see if you get any
634 output, for instance::
638 This will return a list of the actual users in the OpenStack
639 deployment. In any other case, check that the credentials are sourced::
643 This command must show a set of environment variables starting with
646 OS_REGION_NAME=RegionOne
647 OS_DEFAULT_DOMAIN=default
648 OS_PROJECT_NAME=admin
650 OS_AUTH_STRATEGY=keystone
651 OS_AUTH_URL=http://172.30.10.3:5000/v2.0
654 OS_ENDPOINT_TYPE=internalURL
657 If the OpenStack command still does not show anything or complains
658 about connectivity issues, it could be due to an incorrect url given to
659 the OS_AUTH_URL environment variable. Check the deployment settings.
663 If you need to connect to a server that is TLS-enabled (the auth URL
664 begins with "https") and it uses a certificate from a private CA or a
665 self-signed certificate, then you will need to specify the path to an
666 appropriate CA certificate to use, to validate the server certificate
667 with the environment variable OS_CACERT::
670 /etc/ssl/certs/ca.crt
672 However, this certificate does not exist in the container by default.
673 It has to be copied manually from the OpenStack deployment. This can be
676 #. Create manually that file and copy the contents from the OpenStack
678 #. (Recommended) Add the file using a Docker volume when starting the
681 -v <path_to_your_cert_file>:/etc/ssl/certs/ca.cert
683 You might need to export OS_CACERT environment variable inside the
686 export OS_CACERT=/etc/ssl/certs/ca.crt
688 Certificate verification can be turned off using OS_INSECURE=true. For
689 example, Fuel uses self-signed cacerts by default, so an pre step would
692 export OS_INSECURE=true
696 If your Jumphost node is operating behind a http proxy, then there are
697 2 places where some special actions may be needed to make operations
700 #. Initial installation of docker engine First, try following the
701 official Docker documentation for Proxy settings. Some issues were
702 experienced on CentOS 7 based Jumphost. Some tips are documented
703 in section: `Docker Installation on CentOS behind http proxy`_
706 #. Execution of the Functest environment preparation inside the
707 created docker container Functest needs internet access to
708 download some resources for some test cases. This might not
709 work properly if the Jumphost is connecting to internet
710 through a http Proxy.
712 If that is the case, make sure the resolv.conf and the needed
713 http_proxy and https_proxy environment variables, as well as the
714 'no_proxy' environment variable are set correctly::
716 # Make double sure that the 'no_proxy=...' line in the
717 # 'openstack.creds' file is commented out first. Otherwise, the
718 # values set into the 'no_proxy' environment variable below will
719 # be ovewrwritten, each time the command
720 # 'source ~/functest/conf/openstack.creds' is issued.
723 sed -i 's/export no_proxy/#export no_proxy/' openstack.creds
724 source ./openstack.creds
726 # Next calculate some IP addresses for which http_proxy
727 # usage should be excluded:
729 publicURL_IP=$(echo $OS_AUTH_URL | grep -Eo "([0-9]+\.){3}[0-9]+")
731 adminURL_IP=$(openstack catalog show identity | \
732 grep adminURL | grep -Eo "([0-9]+\.){3}[0-9]+")
734 export http_proxy="<your http proxy settings>"
735 export https_proxy="<your https proxy settings>"
736 export no_proxy="127.0.0.1,localhost,$publicURL_IP,$adminURL_IP"
738 # Ensure that "git" uses the http_proxy
739 # This may be needed if your firewall forbids SSL based git fetch
740 git config --global http.sslVerify True
741 git config --global http.proxy <Your http proxy settings>
743 Validation check: Before running **'functest env prepare'** CLI command,
744 make sure you can reach http and https sites from inside the Functest
747 For example, try to use the **nc** command from inside the functest
751 Connection to opnfv.org 80 port [tcp/http] succeeded!
754 Connection to opnfv.org 443 port [tcp/https] succeeded!
756 Note: In a Jumphost node based on the CentOS family OS, the **nc**
757 commands might not work. You can use the **curl** command instead.
759 curl http://www.opnfv.org:80
760 <HTML><HEAD><meta http-equiv="content-type"
765 curl https://www.opnfv.org:443
766 <HTML><HEAD><meta http-equiv="content-type"
771 (Ignore the content. If command returns a valid HTML page, it proves
774 Docker Installation on CentOS behind http proxy
775 -----------------------------------------------
776 This section is applicable for CentOS family OS on Jumphost which
777 itself is behind a proxy server. In that case, the instructions below
778 should be followed **before** installing the docker engine::
780 1) # Make a directory '/etc/systemd/system/docker.service.d'
781 # if it does not exist
782 sudo mkdir /etc/systemd/system/docker.service.d
784 2) # Create a file called 'env.conf' in that directory with
785 # the following contents:
787 EnvironmentFile=-/etc/sysconfig/docker
789 3) # Set up a file called 'docker' in directory '/etc/sysconfig'
790 # with the following contents:
791 HTTP_PROXY="<Your http proxy settings>"
792 HTTPS_PROXY="<Your https proxy settings>"
793 http_proxy="${HTTP_PROXY}"
794 https_proxy="${HTTPS_PROXY}"
796 4) # Reload the daemon
797 systemctl daemon-reload
799 5) # Sanity check - check the following docker settings:
800 systemctl show docker | grep -i env
804 EnvironmentFile=/etc/sysconfig/docker (ignore_errors=yes)
805 DropInPaths=/etc/systemd/system/docker.service.d/env.conf
807 Now follow the instructions in [`InstallDockerCentOS`_] to download
808 and install the **docker-engine**. The instructions conclude with a
809 "test pull" of a sample "Hello World" docker container. This should now
810 work with the above pre-requisite actions.
812 .. _dockerdocs: https://docs.docker.com/
813 .. _dockerhub: https://hub.docker.com/r/opnfv/functest/
814 .. _Proxy: https://docs.docker.com/engine/admin/systemd/#http-proxy
815 .. _FunctestDockerTags: https://hub.docker.com/r/opnfv/functest/tags/
816 .. _InstallDockerCentOS: https://docs.docker.com/engine/installation/linux/centos/
817 .. _OPNFV_FuncTestUserGuide: http://artifacts.opnfv.org/functest/docs/userguide/index.html