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diff --git a/docs/release/userguide/installguide.docker.rst b/docs/release/userguide/installguide.docker.rst index 4f01630f..9141eef6 100644 --- a/docs/release/userguide/installguide.docker.rst +++ b/docs/release/userguide/installguide.docker.rst @@ -1,25 +1,25 @@ +.. _barometer-docker-userguide: .. This work is licensed under a Creative Commons Attribution 4.0 International License. .. http://creativecommons.org/licenses/by/4.0 -.. (c) <optionally add copywriters name> -.. _barometer-docker-userguide: +.. (c) Anuket and others -==================================== -OPNFV Barometer Docker Install Guide -==================================== +===================================== +Anuket Barometer Docker Install Guide +===================================== .. contents:: :depth: 3 :local: The intention of this user guide is to outline how to install and test the Barometer project's -docker images. The `OPNFV docker hub <https://hub.docker.com/u/opnfv/?page=1>`_ contains 5 docker +docker images. The `Anuket docker hub <https://hub.docker.com/u/anuket/>`_ contains 5 docker images from the Barometer project: - 1. `Collectd docker image <https://hub.docker.com/r/opnfv/barometer-collectd/>`_ - 2. `Influxdb docker image <https://hub.docker.com/r/opnfv/barometer-influxdb/>`_ - 3. `Grafana docker image <https://hub.docker.com/r/opnfv/barometer-grafana/>`_ - 4. `Kafka docker image <https://hub.docker.com/r/opnfv/barometer-kafka/>`_ - 5. `VES application docker image <https://hub.docker.com/r/opnfv/barometer-ves/>`_ + 1. `Collectd docker image <https://hub.docker.com/r/anuket/barometer-collectd/>`_ + 2. `Influxdb docker image <https://hub.docker.com/r/anuket/barometer-influxdb/>`_ + 3. `Grafana docker image <https://hub.docker.com/r/anuket/barometer-grafana/>`_ + 4. `Kafka docker image <https://hub.docker.com/r/anuket/barometer-kafka>`_ + 5. `VES application docker image <https://hub.docker.com/r/anuket/barometer-ves/>`_ For description of images please see section `Barometer Docker Images Description`_ @@ -31,7 +31,9 @@ For steps to build and run VES and Kafka images please see section `Build and Ru For overview of running VES application with Kafka please see the :ref:`VES Application User Guide <barometer-ves-userguide>` -For an alternative installation method using ansible, please see the :ref:`Barometer One Click Install Guide <barometer-oneclick-userguide>`. +For an alternative installation method using ansible, please see the :ref:`Barometer One Click Install Guide <barometer-oneclick-userguide>`. + +For post-installation verification and troubleshooting, please see the :ref:`Barometer post installation guide <barometer-postinstall>`. Barometer Docker Images Description ----------------------------------- @@ -46,7 +48,7 @@ the barometer plugins. .. note:: The Dockerfile is available in the docker/barometer-collectd directory in the barometer repo. - The Dockerfile builds a CentOS 7 docker image. + The Dockerfile builds a CentOS 8 docker image. The container MUST be run as a privileged container. Collectd is a daemon which collects system performance statistics periodically @@ -93,7 +95,7 @@ The Barometer project's VES application and Kafka docker images are based on a C docker image has a dependancy on `Zookeeper <https://zookeeper.apache.org/>`_. Kafka must be able to connect and register with an instance of Zookeeper that is either running on local or remote host. Kafka recieves and stores metrics recieved from Collectd. VES application pulls latest metrics from Kafka -which it normalizes into VES format for sending to a VES collector. Please see details in +which it normalizes into VES format for sending to a VES collector. Please see details in :ref:`VES Application User Guide <barometer-ves-userguide>` Installing Docker @@ -268,11 +270,12 @@ Collectd-barometer flavors Before starting to build and run the Collectd container, understand the available flavors of Collectd containers: - * barometer-collectd - stable release, based on collectd 5.11 - * barometer-collectd-master - release based on collectd 'main' branch - * barometer-collectd-experimental - release based on collectd 'main' - branch that also includes set of experimental (not yet merged into upstream) - pull requests + +* barometer-collectd - stable release, based on collectd 5.12 +* barometer-collectd-latest - release based on collectd 'main' branch +* barometer-collectd-experimental - release based on collectd 'main' + branch that can also include a set of experimental (not yet merged into + upstream) pull requests .. note:: Experimental container is not tested across various OS'es and the stability @@ -280,7 +283,7 @@ flavors of Collectd containers: Stable `barometer-collectd` container is intended for work in production environment as it is based on latest collectd official release. -`Barometer-collectd-master` and `barometer-collectd-experimental` containers +`barometer-collectd-latest` and `barometer-collectd-experimental` containers can be used in order to try new collectd features. All flavors are located in `barometer` git repository - respective Dockerfiles are stored in subdirectories of `docker/` directory @@ -291,7 +294,7 @@ are stored in subdirectories of `docker/` directory $ git clone https://gerrit.opnfv.org/gerrit/barometer $ ls barometer/docker|grep collectd barometer-collectd - barometer-collectd-master + barometer-collectd-latest barometer-collectd-experimental .. note:: @@ -302,11 +305,11 @@ are stored in subdirectories of `docker/` directory Download the collectd docker image ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If you wish to use a pre-built barometer image, you can pull the barometer -image from https://hub.docker.com/r/opnfv/barometer-collectd/ +image from `dockerhub <https://hub.docker.com/r/anuket/barometer-collectd/>`_ .. code:: bash - $ docker pull opnfv/barometer-collectd + $ docker pull anuket/barometer-collectd Build stable collectd container ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -314,7 +317,7 @@ Build stable collectd container .. code:: bash $ cd <BAROMETER_REPO_DIR>/docker/barometer-collectd - $ sudo docker build -t opnfv/barometer-collectd --build-arg http_proxy=`echo $http_proxy` \ + $ sudo docker build -t anuket/barometer-collectd --build-arg http_proxy=`echo $http_proxy` \ --build-arg https_proxy=`echo $https_proxy` --network=host -f Dockerfile . .. note:: @@ -327,53 +330,99 @@ Check the docker images: $ sudo docker images -Output should contain a barometer-collectd image: +Output should contain a ``barometer-collectd`` image: .. code:: REPOSITORY TAG IMAGE ID CREATED SIZE - opnfv/barometer-collectd latest 05f2a3edd96b 3 hours ago 1.2GB + anuket/barometer-collectd latest 39f5e0972178 2 months ago 1.28GB centos 7 196e0ce0c9fb 4 weeks ago 197MB centos latest 196e0ce0c9fb 4 weeks ago 197MB hello-world latest 05a3bd381fc2 4 weeks ago 1.84kB .. note:: - If you do not plan to use collectd-master and collectd-experimental barometer - containers, then you can proceed directly to section `Run the collectd stable docker image`_ + If you do not plan to use `barometer-collectd-latest` and + `barometer-collectd-experimental` containers, then you can proceed directly + to section `Run the collectd stable docker image`_ -Build collectd-master container -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Build barometer-collectd-latest container +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code:: bash $ cd <BAROMETER_REPO_DIR> - $ sudo docker build -t opnfv/barometer-collectd-master \ + $ sudo docker build -t anuket/barometer-collectd-latest \ --build-arg http_proxy=`echo $http_proxy` \ --build-arg https_proxy=`echo $https_proxy` --network=host -f \ - docker/barometer-collectd-master/Dockerfile . + docker/barometer-collectd-latest/Dockerfile . .. note:: - For `barometer-collectd-master` and `barometer-collectd-experimental` containers + For `barometer-collectd-latest` and `barometer-collectd-experimental` containers proxy parameters should be passed only if system is behind an HTTP or HTTPS proxy server (same as for stable collectd container) -Build collectd-experimental container -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Build barometer-collectd-experimental container +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The barometer-collectd-experimental container use the ``main`` branch of +collectd, but allows the user to apply a number of pull requests, which are +passed via the COLLECTD_PULL_REQUESTS build arg, which is passed to docker as +shown in the example below. +COLLECTD_PULL_REQUESTS should be a comma-delimited string of pull request IDs. .. code:: bash $ cd <BAROMETER_REPO_DIR> - $ sudo docker build -t opnfv/barometer-collectd-experimental \ + $ sudo docker build -t anuket/barometer-collectd-experimental \ --build-arg http_proxy=`echo $http_proxy` \ --build-arg https_proxy=`echo $https_proxy` \ + --build-arg COLLECTD_PULL_REQUESTS=1234,5678 \ --network=host -f docker/barometer-collectd-experimental/Dockerfile . .. note:: - For `barometer-collectd-master` and `barometer-collectd-experimental` containers + For `barometer-collectd-latest` and `barometer-collectd-experimental` containers proxy parameters should be passed only if system is behind an HTTP or HTTPS proxy server (same as for stable collectd container) +Build collectd-6 +^^^^^^^^^^^^^^^^ + +The barometer-collectd-experimental Dockerfile can be used to build +collectd-6.0, which is currently under development. In order to do this, the +``COLLECTD_FLAVOR`` build arg can be passed to the docker build command. +The optional ``COLLECTD_PULL_REQUESTS`` arg can be passed as well, to test +proposed patches to collectd. + +.. code:: bash + + $ cd <BAROMETER_REPO_DIR> + $ sudo docker build -t anuket/barometer-collectd-6 \ + --build-arg COLLECTD_FLAVOR=collectd-6 \ + --build-arg COLLECTD_PULL_REQUESTS=1234,5678 \ + --network=host -f docker/barometer-collectd-experimental/Dockerfile . + +The instructions for running the collectd-6 container are the same as for the +collectd-experimental container. + +There are a few useful build args that can be used to further customise the +collectd-6 build: + +* **COLLECTD_CONFIG_CMD_ARGS** + For testing with new plugins for collectd-6, as un-ported plugins are + disabled by default. + This new option lets the ./configure command be run with extra args, + e.g. --enable-cpu --enable-<my-newly-ported-plugin>, which means that + plugin can be enabled for the PR that is being tested. + +* **COLLECTD_TAG** + This overrides the default tag selected by the flavors, and allows checking + out out an arbitrary branch (e.g. PR branch instead of using the + ``COLLECTD_PULL_REQUESTS`` arg, which rebases each PR on top of the + nominal branch. + To check out a PR, use the following args with the docker build command: + ``--build-arg COLLECTD_TAG=pull/<PR_ID>/head`` + Run the collectd stable docker image ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. code:: bash @@ -382,7 +431,7 @@ Run the collectd stable docker image $ sudo docker run -ti --net=host -v \ `pwd`/src/collectd/collectd_sample_configs:/opt/collectd/etc/collectd.conf.d \ -v /var/run:/var/run -v /tmp:/tmp -v /sys/fs/resctrl:/sys/fs/resctrl \ - --privileged opnfv/barometer-collectd + --privileged anuket/barometer-collectd .. note:: The docker collectd image contains configuration for all the collectd @@ -401,15 +450,14 @@ Run the collectd stable docker image files should be removed from shared configuration directory (`<BAROMETER_REPO_DIR>/src/collectd/collectd_sample_configs/`) prior to starting barometer-collectd container. By example: in case of missing - `DPDK` functionality on the host, `dpdkstat.conf` and `dpdkevents.conf` - should be removed. + `DPDK` functionality on the host, `dpdk_telemetry.conf` should be removed. Sample configurations can be found at: https://github.com/opnfv/barometer/tree/master/src/collectd/collectd_sample_configs List of barometer-collectd dependencies on host for various plugins can be found at: - https://wiki.opnfv.org/display/fastpath/Barometer-collectd+host+dependencies + https://wiki.anuket.io/display/HOME/Barometer-collectd+host+dependencies The Resource Control file system (/sys/fs/resctrl) can be bound from host to container only if this directory exists on the host system. Otherwise omit @@ -429,26 +477,26 @@ To make some changes when the container is running run: sudo docker exec -ti <CONTAINER ID> /bin/bash -Run the barometer-collectd-master docker image +Run the barometer-collectd-latest docker image ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -Run command for `barometer-collectd-master` container is very similar to command -used for stable container - the only differences are name of the image -and location of the sample configuration files(as different version of collectd -plugins requiring different configuration files) +Run command for ``barometer-collectd-latest`` container is very similar to +command used for stable container - the only differences are name of the image +and location of the sample configuration files (as different version of +collectd plugins requiring different configuration files) .. code:: bash $ cd <BAROMETER_REPO_DIR> $ sudo docker run -ti --net=host -v \ - `pwd`/src/collectd/collectd_sample_configs-master:/opt/collectd/etc/collectd.conf.d \ + `pwd`/src/collectd/collectd_sample_configs-latest:/opt/collectd/etc/collectd.conf.d \ -v /var/run:/var/run -v /tmp:/tmp -v /sys/fs/resctrl:/sys/fs/resctrl \ - --privileged opnfv/barometer-collectd-master + --privileged anuket/barometer-collectd-latest .. note:: Barometer collectd docker images are sharing some directories with host (e.g. /tmp) therefore only one of collectd barometer flavors can be run - at a time. In other words, if you want to try `barometer-collectd-master` or + at a time. In other words, if you want to try `barometer-collectd-latest` or `barometer-collectd-experimental` image, please stop instance of `barometer-collectd(stable)` image first. @@ -461,31 +509,31 @@ plugins requiring different configuration files) Run the barometer-collectd-experimental docker image ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Barometer-collectd-experimental container shares default configuration files -with 'barometer-collectd-master' equivalent but some of experimental pull +with 'barometer-collectd-latest' equivalent but some of experimental pull requests may require modified configuration. Additional configuration files that are required specifically by experimental container can be found in `docker/barometer-collectd-experimental/experimental-configs/` directory. Content of this directory (all \*.conf files) should be copied to -`src/collectd/collectd_sample_configs-master` directory before first run of +``src/collectd/collectd_sample_configs-latest`` directory before first run of experimental container. .. code:: bash $ cd <BAROMETER_REPO_DIR> $ cp docker/barometer-collectd-experimental/experimental-configs/*.conf \ - src/collectd/collectd_sample_configs-master + src/collectd/collectd_sample_configs-latest When configuration files are up to date for experimental container, it can be -launched using following command (almost identical to run-command for 'master' +launched using following command (almost identical to run-command for ``latest`` collectd container) .. code:: bash $ cd <BAROMETER_REPO_DIR> $ sudo docker run -ti --net=host -v \ - `pwd`/src/collectd/collectd_sample_configs-master:/opt/collectd/etc/collectd.conf.d \ + `pwd`/src/collectd/collectd_sample_configs-latest:/opt/collectd/etc/collectd.conf.d \ -v /var/run:/var/run -v /tmp:/tmp -v /sys/fs/resctrl:/sys/fs/resctrl --privileged \ - opnfv/barometer-collectd-experimental + anuket/barometer-collectd-experimental .. note:: The Resource Control file system (/sys/fs/resctrl) can be bound from host to @@ -523,7 +571,7 @@ volume folder been mounted. Appropriate example are given in section `Run the Gr Download the InfluxDB and Grafana docker images ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If you wish to use pre-built barometer project's influxdb and grafana images, you can pull the -images from https://hub.docker.com/r/opnfv/barometer-influxdb/ and https://hub.docker.com/r/opnfv/barometer-grafana/ +images from https://hub.docker.com/r/anuket/barometer-influxdb/ and https://hub.docker.com/r/anuket/barometer-grafana/ .. note:: If your preference is to build images locally please see sections `Build InfluxDB Docker Image`_ and @@ -531,8 +579,8 @@ images from https://hub.docker.com/r/opnfv/barometer-influxdb/ and https://hub.d .. code:: bash - $ docker pull opnfv/barometer-influxdb - $ docker pull opnfv/barometer-grafana + $ docker pull anuket/barometer-influxdb + $ docker pull anuket/barometer-grafana .. note:: If you have pulled the pre-built barometer-influxdb and barometer-grafana images there is no @@ -548,7 +596,7 @@ Build influxdb image from Dockerfile .. code:: bash $ cd barometer/docker/barometer-influxdb - $ sudo docker build -t opnfv/barometer-influxdb --build-arg http_proxy=`echo $http_proxy` \ + $ sudo docker build -t anuket/barometer-influxdb --build-arg http_proxy=`echo $http_proxy` \ --build-arg https_proxy=`echo $https_proxy` --network=host -f Dockerfile . .. note:: @@ -566,7 +614,7 @@ Output should contain an influxdb image: .. code:: REPOSITORY TAG IMAGE ID CREATED SIZE - opnfv/barometer-influxdb latest 1e4623a59fe5 3 days ago 191MB + anuket/barometer-influxdb latest c5a09a117067 2 months ago 191MB Build Grafana docker image ^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -576,7 +624,7 @@ Build Grafana image from Dockerfile .. code:: bash $ cd barometer/docker/barometer-grafana - $ sudo docker build -t opnfv/barometer-grafana --build-arg http_proxy=`echo $http_proxy` \ + $ sudo docker build -t anuket/barometer-grafana --build-arg http_proxy=`echo $http_proxy` \ --build-arg https_proxy=`echo $https_proxy` -f Dockerfile . .. note:: @@ -594,7 +642,7 @@ Output should contain an influxdb image: .. code:: REPOSITORY TAG IMAGE ID CREATED SIZE - opnfv/barometer-grafana latest 05f2a3edd96b 3 hours ago 1.2GB + anuket/barometer-grafana latest 3724ab87f0b1 2 months ago 284MB Run the Influxdb and Grafana Images ----------------------------------- @@ -604,7 +652,7 @@ Run the InfluxDB docker image .. code:: bash $ sudo docker run -tid -v /var/lib/influxdb:/var/lib/influxdb --net=host\ - --name bar-influxdb opnfv/barometer-influxdb + --name bar-influxdb anuket/barometer-influxdb Check your docker image is running @@ -665,7 +713,7 @@ changing output location is required: $ cd <BAROMETER_REPO_DIR> $ sudo docker run -ti --name bar-collectd --net=host -v \ `pwd`/src/collectd/collectd_sample_configs:/opt/collectd/etc/collectd.conf.d \ - -v /var/run:/var/run -v /tmp:/tmp --privileged opnfv/barometer-collectd + -v /var/run:/var/run -v /tmp:/tmp --privileged anuket/barometer-collectd Now collectd container will be sending data to InfluxDB container located on remote Host pointed by IP configured in step 3. @@ -680,7 +728,7 @@ Connecting to an influxdb instance running on local system and adding own custom $ cd <BAROMETER_REPO_DIR> $ sudo docker run -tid -v /var/lib/grafana:/var/lib/grafana \ -v ${PWD}/docker/barometer-grafana/dashboards:/opt/grafana/dashboards \ - --name bar-grafana --net=host opnfv/barometer-grafana + --name bar-grafana --net=host anuket/barometer-grafana Connecting to an influxdb instance running on remote system with hostname of someserver and IP address of 192.168.121.111 @@ -689,7 +737,7 @@ of 192.168.121.111 $ sudo docker run -tid -v /var/lib/grafana:/var/lib/grafana --net=host -e \ influxdb_host=someserver --add-host someserver:192.168.121.111 --name \ - bar-grafana opnfv/barometer-grafana + bar-grafana anuket/barometer-grafana Check your docker image is running @@ -737,16 +785,16 @@ Download VES and Kafka docker images ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If you wish to use pre-built barometer project's VES and kafka images, you can pull the -images from https://hub.docker.com/r/opnfv/barometer-ves/ and https://hub.docker.com/r/opnfv/barometer-kafka/ +images from https://hub.docker.com/r/anuket/barometer-ves/ and https://hub.docker.com/r/anuket/barometer-kafka/ .. note:: - If your preference is to build images locally please see sections `Build the Kafka Image`_ and - `Build VES Image`_ + If your preference is to build images locally please see sections `Build Kafka Docker Image`_ and + `Build VES Docker Image`_ .. code:: bash - $ docker pull opnfv/barometer-kafka - $ docker pull opnfv/barometer-ves + $ docker pull anuket/barometer-kafka + $ docker pull anuket/barometer-ves .. note:: If you have pulled the pre-built images there is no requirement to complete steps outlined @@ -761,7 +809,7 @@ Build Kafka docker image: .. code:: bash $ cd barometer/docker/barometer-kafka - $ sudo docker build -t opnfv/barometer-kafka --build-arg http_proxy=`echo $http_proxy` \ + $ sudo docker build -t anuket/barometer-kafka --build-arg http_proxy=`echo $http_proxy` \ --build-arg https_proxy=`echo $https_proxy` -f Dockerfile . .. note:: @@ -779,7 +827,7 @@ Output should contain a barometer image: .. code:: REPOSITORY TAG IMAGE ID CREATED SIZE - opnfv/barometer-kafka latest 05f2a3edd96b 3 hours ago 1.2GB + anuket/barometer-kafka latest 75a0860b8d6e 2 months ago 902MB Build VES docker image ^^^^^^^^^^^^^^^^^^^^^^ @@ -789,7 +837,7 @@ Build VES application docker image: .. code:: bash $ cd barometer/docker/barometer-ves - $ sudo docker build -t opnfv/barometer-ves --build-arg http_proxy=`echo $http_proxy` \ + $ sudo docker build -t anuket/barometer-ves --build-arg http_proxy=`echo $http_proxy` \ --build-arg https_proxy=`echo $https_proxy` -f Dockerfile . .. note:: @@ -807,7 +855,7 @@ Output should contain a barometer image: .. code:: REPOSITORY TAG IMAGE ID CREATED SIZE - opnfv/barometer-ves latest 05f2a3edd96b 3 hours ago 1.2GB + anuket/barometer-ves latest 36a4a953e1b4 2 months ago 723MB Run Kafka docker image ^^^^^^^^^^^^^^^^^^^^^^ @@ -832,7 +880,7 @@ Run kafka docker image which connects with a zookeeper instance running on same .. code:: bash - $ sudo docker run -tid --net=host -p 9092:9092 opnfv/barometer-kafka + $ sudo docker run -tid --net=host -p 9092:9092 anuket/barometer-kafka Run kafka docker image which connects with a zookeeper instance running on a node with IP address of @@ -841,7 +889,7 @@ Run kafka docker image which connects with a zookeeper instance running on a nod .. code:: bash $ sudo docker run -tid --net=host -p 9092:9092 --env broker_id=1 --env zookeeper_node=zookeeper --add-host \ - zookeeper:192.168.121.111 opnfv/barometer-kafka + zookeeper:192.168.121.111 anuket/barometer-kafka Run VES Application docker image ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -858,13 +906,13 @@ Run VES docker image with default configuration .. code:: bash - $ sudo docker run -tid --net=host opnfv/barometer-ves + $ sudo docker run -tid --net=host anuket/barometer-ves Run VES docker image with guest.yaml files from barometer/3rd_party/collectd-ves-app/ves_app/yaml/ .. code:: bash - $ sudo docker run -tid --net=host opnfv/barometer-ves guest.yaml + $ sudo docker run -tid --net=host anuket/barometer-ves guest.yaml Run VES docker image with using custom config and yaml files. In example below yaml/ folder cotains @@ -873,7 +921,7 @@ file named custom.yaml .. code:: bash $ sudo docker run -tid --net=host -v ${PWD}/custom.config:/opt/ves/config/ves_app_config.conf \ - -v ${PWD}/yaml/:/opt/ves/yaml/ opnfv/barometer-ves custom.yaml + -v ${PWD}/yaml/:/opt/ves/yaml/ anuket/barometer-ves custom.yaml Run VES Test Collector application ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -953,7 +1001,7 @@ Run DMA docker image ^^^^^^^^^^^^^^^^^^^^ .. note:: -Run DMA docker image with default configuration + Run DMA docker image with default configuration .. code:: bash |