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::
348 Underneath the '/home/opnfv/' directory, the Functest docker container
349 includes two main directories:
351 * The **functest** directory stores configuration files (e.g. the
352 OpenStack creds are stored in path '/home/opnfv/functest/conf/openstack.creds'),
353 the **data** directory stores a 'cirros' test image used in some
354 functional tests and the **results** directory stores some temporary
356 * The **repos** directory holds various repositories. The directory
357 '/home/opnfv/repos/functest' is used to prepare the needed Functest
358 environment and to run the tests. The other repository directories
359 are used for the installation of the needed tooling (e.g. rally) or
360 for the retrieval of feature projects scenarios (e.g. promise)
362 The structure under the **functest** repository can be described as
368 |-- run_unit_tests.sh
370 |-- test-requirements.txt
374 | `--traffic-profile-guidelines.rst
377 | |-- config_install_env.sh
378 | `-- docker_remote_api
393 | |-- config_functest.yaml
394 | |-- config_patch.yaml
395 | |-- generate_report.py
399 | |-- tier_builder.py
400 | `-- tier_handler.py
405 | |-- functest-complete.sh
410 | |-- pytest_suite_runner.py
429 |-- functest_logger.py
430 |-- functest_utils.py
432 |-- openstack_clean.py
433 |-- openstack_snapshot.py
434 |-- openstack_tacker.py
435 `-- openstack_utils.py
438 (Note: All *.pyc files removed from above list for brevity...)
440 We may distinguish several directories, the first level has 4 directories:
442 * **commons**: This directory is dedicated for storage of traffic
443 profile or any other test inputs that could be reused by any test
445 * **docker**: This directory includes the needed files and tools to
446 build the Funtest Docker image.
447 * **docs**: This directory includes documentation: Release Notes,
448 User Guide, Configuration Guide and Developer Guide.
449 * **functest**: This directory contains all the code needed to run
450 functest internal cases and OPNFV onboarded feature or VNF test cases.
452 Functest directory has 6 directories:
453 * **ci**: This directory contains test structure definition files
454 (e.g <filename>.yaml) and bash shell/python scripts used to
455 configure and execute Functional tests. The test execution script
456 can be executed under the control of Jenkins CI jobs.
457 * **cli**: This directory holds the python based Functest CLI utility
458 source code, which is based on the Python 'click' framework.
459 * **core**: This directory holds the python based Functest core
460 source code. Three abstraction classes have been created to ease
461 the integration of internal, feature or vnf cases.
462 * **opnfv_tests**: This directory includes the scripts required by
463 Functest internal test cases and other feature projects test cases.
464 * **tests**: This directory includes the functest unit tests
465 * **utils**: this directory holds Python source code for some general
466 purpose helper utilities, which testers can also re-use in their
467 own test code. See for an example the Openstack helper utility:
468 'openstack_utils.py'.
470 Useful Docker commands
471 ----------------------
472 When typing **exit** in the container prompt, this will cause exiting
473 the container and probably stopping it. When stopping a running Docker
474 container all the changes will be lost, there is a keyboard shortcut
475 to quit the container without stopping it: <CTRL>-P + <CTRL>-Q. To
476 reconnect to the running container **DO NOT** use the *run* command
477 again (since it will create a new container), use the *exec* or *attach*
480 docker ps # <check the container ID from the output>
481 docker exec -ti <CONTAINER_ID> /bin/bash
483 There are other useful Docker commands that might be needed to manage possible
484 issues with the containers.
486 List the running containers::
490 List all the containers including the stopped ones::
494 Start a stopped container named "FunTest"::
498 Attach to a running container named "StrikeTwo"::
500 docker attach StrikeTwo
502 It is useful sometimes to remove a container if there are some problems::
504 docker rm <CONTAINER_ID>
506 Use the *-f* option if the container is still running, it will force to
509 docker rm -f <CONTAINER_ID>
511 Check the Docker documentation dockerdocs_ for more information.
513 Preparing the Functest environment
514 ----------------------------------
515 Once the Functest docker container is up and running, the required
516 Functest environment needs to be prepared. A custom built **functest**
517 CLI utility is available to perform the needed environment preparation
518 action. Once the environment is prepared, the **functest** CLI utility
519 can be used to run different functional tests. The usage of the
520 **functest** CLI utility to run tests is described further in the
521 Functest User Guide `OPNFV_FuncTestUserGuide`_
523 Prior to commencing the Functest environment preparation, we can check
524 the initial status of the environment. Issue the **functest env status**
525 command at the prompt::
528 Functest environment is not installed.
530 Note: When the Functest environment is prepared, the command will
531 return the status: "Functest environment ready to run tests."
533 To prepare the Functest docker container for test case execution, issue
534 the **functest env prepare** command at the prompt::
538 This script will make sure that the requirements to run the tests are
539 met and will install the needed libraries and tools by all Functest
540 test cases. It should be run only once every time the Functest docker
541 container is started from scratch. If you try to run this command, on
542 an already prepared enviroment, you will be prompted whether you really
543 want to continue or not::
546 It seems that the environment has been already prepared.
547 Do you want to do it again? [y|n]
549 (Type 'n' to abort the request, or 'y' to repeat the
550 environment preparation)
553 To list some basic information about an already prepared Functest
554 docker container environment, issue the **functest env show** at the
558 +======================================================+
559 | Functest Environment info |
560 +======================================================+
561 | INSTALLER: apex, 192.168.122.89 |
562 | SCENARIO: os-odl_l2-nofeature-ha |
564 | GIT BRANCH: master |
565 | GIT HASH: 5bf1647dec6860464eeb082b2875798f0759aa91 |
566 | DEBUG FLAG: false |
567 +------------------------------------------------------+
569 +------------------------------------------------------+
573 INSTALLER: Displays the INSTALLER_TYPE value
575 and the INSTALLER_IP value
576 - here = "192.168.122.89"
577 SCENARIO: Displays the DEPLOY_SCENARIO value
578 - here = "os-odl_l2-nofeature-ha"
579 POD: Displays the value passed in NODE_NAME
581 GIT BRANCH: Displays the git branch of the OPNFV Functest
582 project repository included in the Functest
585 (In first official colorado release
586 would be "colorado.1.0")
587 GIT HASH: Displays the git hash of the OPNFV Functest
588 project repository included in the Functest
590 - here = "5bf1647dec6860464eeb082b2875798f0759aa91"
591 DEBUG FLAG: Displays the CI_DEBUG value
594 NOTE: In Jenkins CI runs, an additional item "BUILD TAG"
595 would also be listed. The value is set by Jenkins CI.
597 Finally, the **functest** CLI has a **--help** options:
601 functest --help Usage: functest [OPTIONS] COMMAND [ARGS]...
604 --version Show the version and exit.
605 -h, --help Show this message and exit.
614 Usage: functest env [OPTIONS] COMMAND [ARGS]...
617 -h, --help Show this message and exit.
620 prepare Prepares the Functest environment.
621 show Shows information about the current...
622 status Checks if the Functest environment is ready...
624 Checking Openstack and credentials
625 ----------------------------------
626 It is recommended and fairly straightforward to check that Openstack
627 and credentials are working as expected.
629 Once the credentials are there inside the container, they should be
630 sourced before running any Openstack commands::
632 source /home/opnfv/functest/conf/openstack.creds
634 After this, try to run any OpenStack command to see if you get any
635 output, for instance::
639 This will return a list of the actual users in the OpenStack
640 deployment. In any other case, check that the credentials are sourced::
644 This command must show a set of environment variables starting with
647 OS_REGION_NAME=RegionOne
648 OS_DEFAULT_DOMAIN=default
649 OS_PROJECT_NAME=admin
651 OS_AUTH_STRATEGY=keystone
652 OS_AUTH_URL=http://172.30.10.3:5000/v2.0
655 OS_ENDPOINT_TYPE=internalURL
658 If the OpenStack command still does not show anything or complains
659 about connectivity issues, it could be due to an incorrect url given to
660 the OS_AUTH_URL environment variable. Check the deployment settings.
664 If you need to connect to a server that is TLS-enabled (the auth URL
665 begins with "https") and it uses a certificate from a private CA or a
666 self-signed certificate, then you will need to specify the path to an
667 appropriate CA certificate to use, to validate the server certificate
668 with the environment variable OS_CACERT::
671 /etc/ssl/certs/ca.crt
673 However, this certificate does not exist in the container by default.
674 It has to be copied manually from the OpenStack deployment. This can be
677 #. Create manually that file and copy the contents from the OpenStack
679 #. (Recommended) Add the file using a Docker volume when starting the
682 -v <path_to_your_cert_file>:/etc/ssl/certs/ca.cert
684 You might need to export OS_CACERT environment variable inside the
687 export OS_CACERT=/etc/ssl/certs/ca.crt
689 Certificate verification can be turned off using OS_INSECURE=true. For
690 example, Fuel uses self-signed cacerts by default, so an pre step would
693 export OS_INSECURE=true
697 If your Jumphost node is operating behind a http proxy, then there are
698 2 places where some special actions may be needed to make operations
701 #. Initial installation of docker engine First, try following the
702 official Docker documentation for Proxy settings. Some issues were
703 experienced on CentOS 7 based Jumphost. Some tips are documented
704 in section: `Docker Installation on CentOS behind http proxy`_
707 #. Execution of the Functest environment preparation inside the
708 created docker container Functest needs internet access to
709 download some resources for some test cases. This might not
710 work properly if the Jumphost is connecting to internet
711 through a http Proxy.
713 If that is the case, make sure the resolv.conf and the needed
714 http_proxy and https_proxy environment variables, as well as the
715 'no_proxy' environment variable are set correctly::
717 # Make double sure that the 'no_proxy=...' line in the
718 # 'openstack.creds' file is commented out first. Otherwise, the
719 # values set into the 'no_proxy' environment variable below will
720 # be ovewrwritten, each time the command
721 # 'source ~/functest/conf/openstack.creds' is issued.
724 sed -i 's/export no_proxy/#export no_proxy/' openstack.creds
725 source ./openstack.creds
727 # Next calculate some IP addresses for which http_proxy
728 # usage should be excluded:
730 publicURL_IP=$(echo $OS_AUTH_URL | grep -Eo "([0-9]+\.){3}[0-9]+")
732 adminURL_IP=$(openstack catalog show identity | \
733 grep adminURL | grep -Eo "([0-9]+\.){3}[0-9]+")
735 export http_proxy="<your http proxy settings>"
736 export https_proxy="<your https proxy settings>"
737 export no_proxy="127.0.0.1,localhost,$publicURL_IP,$adminURL_IP"
739 # Ensure that "git" uses the http_proxy
740 # This may be needed if your firewall forbids SSL based git fetch
741 git config --global http.sslVerify True
742 git config --global http.proxy <Your http proxy settings>
744 Validation check: Before running **'functest env prepare'** CLI command,
745 make sure you can reach http and https sites from inside the Functest
748 For example, try to use the **nc** command from inside the functest
752 Connection to opnfv.org 80 port [tcp/http] succeeded!
755 Connection to opnfv.org 443 port [tcp/https] succeeded!
757 Note: In a Jumphost node based on the CentOS family OS, the **nc**
758 commands might not work. You can use the **curl** command instead.
760 curl http://www.opnfv.org:80
761 <HTML><HEAD><meta http-equiv="content-type"
766 curl https://www.opnfv.org:443
767 <HTML><HEAD><meta http-equiv="content-type"
772 (Ignore the content. If command returns a valid HTML page, it proves
775 Docker Installation on CentOS behind http proxy
776 -----------------------------------------------
777 This section is applicable for CentOS family OS on Jumphost which
778 itself is behind a proxy server. In that case, the instructions below
779 should be followed **before** installing the docker engine::
781 1) # Make a directory '/etc/systemd/system/docker.service.d'
782 # if it does not exist
783 sudo mkdir /etc/systemd/system/docker.service.d
785 2) # Create a file called 'env.conf' in that directory with
786 # the following contents:
788 EnvironmentFile=-/etc/sysconfig/docker
790 3) # Set up a file called 'docker' in directory '/etc/sysconfig'
791 # with the following contents:
792 HTTP_PROXY="<Your http proxy settings>"
793 HTTPS_PROXY="<Your https proxy settings>"
794 http_proxy="${HTTP_PROXY}"
795 https_proxy="${HTTPS_PROXY}"
797 4) # Reload the daemon
798 systemctl daemon-reload
800 5) # Sanity check - check the following docker settings:
801 systemctl show docker | grep -i env
805 EnvironmentFile=/etc/sysconfig/docker (ignore_errors=yes)
806 DropInPaths=/etc/systemd/system/docker.service.d/env.conf
808 Now follow the instructions in [`InstallDockerCentOS`_] to download
809 and install the **docker-engine**. The instructions conclude with a
810 "test pull" of a sample "Hello World" docker container. This should now
811 work with the above pre-requisite actions.
813 .. _dockerdocs: https://docs.docker.com/
814 .. _dockerhub: https://hub.docker.com/r/opnfv/functest/
815 .. _Proxy: https://docs.docker.com/engine/admin/systemd/#http-proxy
816 .. _FunctestDockerTags: https://hub.docker.com/r/opnfv/functest/tags/
817 .. _InstallDockerCentOS: https://docs.docker.com/engine/installation/linux/centos/
818 .. _OPNFV_FuncTestUserGuide: http://artifacts.opnfv.org/functest/docs/userguide/index.html