rticom/replay-service repository overview

Welcome to RTI® Replay Service, an RTI Connext® application that replays DDS Topics and discovery data previously recorded by the RTI Recording Service.

For additional information on RTI Replay Service, refer to the RTI documentation⁠.

⁠Releases

The documentation on this page applies to the Replay Service Docker image with the latest tag, which refers to the most recent image released by RTI. To confirm the Connext release that corresponds to the latest tag, or to review the other Connext releases that support the Replay Service image, go to https://hub.docker.com/r/rticom/replay-service/tags⁠.

For documentation on previous releases of the Replay Service image, refer to the https://github.com/rticommunity/rticonnextdds-containers⁠ repository.

⁠Using the Replay Service container image

Running Replay Service on Docker is as simple as running the docker run command:

Important: The default configuration of Replay Service expects database files generated by Recording Service to be available inside the container. These database files contain the recorded data that Replay Service will use. You must provide them (for example, a sample recording) using a bind mount or a Docker volume. Otherwise, the service will have no data to replay and will fail to start correctly with the default configuration.

docker run -dt \
        --network host \
        -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
        -v $PWD/recording_service_database:/home/rtiuser/rti_workspace/7.7.0/database \
        --name=replay_service \
        rticom/replay-service:latest \
        -cfgName default

This command starts Replay Service with an example configuration that replays a record that should be in the database files located in /home/rtiuser/rti_workspace/7.7.0/database/. The following sections explain the different ways to provide the database files.

To run Replay Service, you will need an RTI license file. Bind-mount your license from the host by using the following command-line parameter:

-v $PWD/your/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat

The Replay Service container image uses the following user and group:

• User: rtiuser (1010)
• Group: rtigroup (1010)

The Replay Service container image uses the following working directory:

• /home/rtiuser/rti_workspace/7.7.0/user_config/replay_service

⁠Built-in configuration

Use the following command to retrieve the Replay Service built-in configuration file:

docker cp replay_service:/opt/rti.com/rti_connext_dds-7.7.0/resource/xml/RTI_REPLAY_SERVICE.xml .

The built-in configuration supports the following execution mode:

To select an execution mode, pass the -cfgName parameter with the desired configuration name. For example:

docker run -dt \
        --network host \
        -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
        --name=replay_service \
        rticom/replay-service:latest \
        -cfgName default

When running the Docker container, there are several parameters you can set using environment variables:

General Parameters

-e ADMINISTRATION_DOMAIN=<The domain ID Replay Service uses for the administration channel. default: 0>
-e MONITORING_DOMAIN=<The domain ID Replay Service uses for the monitoring channel. default: 0>
-e DATA_DOMAIN=<The domain ID Replay Service uses for the data channel. default: 0>
-e DATABASE_DIR=<The folder from where the database file is going to be loaded. default: ./cdr_recording>

⁠Database files storage using default storage directory

The default configuration takes the database files from /home/rtiuser/rti_workspace/7.7.0/database/cdr_recording. Take into account that the database files are not in the container’s filesystem. To test this image, you can use the RTI Recording Service Docker image to record some data, and then use the RTI Replay Service image to replay it.

You can use the following two options to provide the database files:

• bind-mount a directory from the host to the database directory
• use a managed volume that contains the database files and mount it to the database directory

The second option is recommended for persisting the database files across container restarts. While bind mounts are dependent on the directory structure and OS of the host machine, volumes are completely managed by Docker; volumes also have much higher performance than bind mounts.

Volume example (Linux OS)

docker run -dt \
        --network host \
        -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
        --mount type=volume,source=recording_service_database,target=/home/rtiuser/rti_workspace/7.7.0/database \
        --name=replay_service \
        rticom/replay-service:latest \
        -cfgName default

The recording_service_database volume should contain the database files in XCDR_AUTO format.

Bind-mount example

docker run -dt \
        --network host \
        -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
        -v $PWD/recording_service_database:/home/rtiuser/rti_workspace/7.7.0/database \
        --name=replay_service \
        rticom/replay-service:latest \
        -cfgName default

Important: The directory $PWD/recording_service_database must exist in the host machine, contain the database files in XCDR_AUTO format, and the user running the container (UID 1010, GID 1010) must have read and write permissions to it.

⁠Database files storage using non-default storage directory

You can change the directory from where the database files are loaded in the container by setting the DATABASE_DIR environment variable.

Volume example (Linux OS)

1. Confirm you have a volume that contains the database files in XCDR_AUTO format. If you do not have a volume, you can create one using the RTI Recording Service Docker image⁠.

   docker volume inspect recording_service_database
   

   Copy

You will see the mount point in the Mountpoint field. For example:

[
  {
    "CreatedAt": "2024-05-11T23:56:27-07:00",
    "Driver": "local",
    "Labels": null,
    "Mountpoint": "/var/lib/docker/volumes/recording_service_database/_data",
    "Name": "recording_service_database",
    "Options": null,
    "Scope": "local"
  }
]

Then you can change the permissions of the mount point to the user and group used by the container:

sudo chown -R 1010:1010 /var/lib/docker/volumes/recording_service_database/_data

1. Run the container:

   docker run -dt \
           --network host \
           -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
           --mount type=volume,source=recording_service_database,target=/home/rtiuser/database \
           -e DATABASE_DIR=/home/rtiuser/database/cdr_recording \
           --name=replay_service \
           rticom/replay-service:latest \
           -cfgName default
   

   Copy

Bind-mount example

docker run -dt \
        --network host \
        -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
        -v $PWD/recording_service_database:/home/rtiuser/database \
        -e DATABASE=/home/rtiuser/database/cdr_recording \
        --name=replay_service \
        rticom/replay-service:latest \
        -cfgName default

Note: The directory recording_service_database must exist in the host machine, and the user running the container (UID 1010, GID 1010) must have read and write permissions to it.

Troubleshooting

With both options, make sure that the permissions of the storage directory are set to the user and group used by the container (rtiuser:rtigroup).

To find the managed volume mount point, use the following command:

docker volume inspect recording_service_database

You will see the mount point in the Mountpoint field. For example:

[
  {
    "CreatedAt": "2024-05-11T23:56:27-07:00",
    "Driver": "local",
    "Labels": null,
    "Mountpoint": "/var/lib/docker/volumes/recording_service_database/_data",
    "Name": "recording_service_database",
    "Options": null,
    "Scope": "local"
  }
]

Then you can change the permissions of the mount point to the user and group used by the container:

sudo chown -R 1010:1010 /var/lib/docker/volumes/recording_service_database/_data

⁠Custom configuration

To provide your own configuration, follow these steps when running the container:

• bind-mount your configuration file (for example, MyReplayService.xml) from the host into the following location in the Docker container: /home/rtiuser/rti_workspace/7.7.0/user_config/replay_service/USER_REPLAY_SERVICE.xml
• select the Replay Service configuration in the configuration file by adding the -cfgName parameter with the name of your selected configuration

For example:

docker run -dt \
        --network host \
        -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
        -v $PWD/MyReplayService.xml:/home/rtiuser/rti_workspace/7.7.0/user_config/replay_service/USER_REPLAY_SERVICE.xml \
        --name=replay_service \
        rticom/replay-service:latest \
        -cfgName MyReplayService

⁠Command-line parameters

To provide your command-line parameters to Replay Service, add them to the end of the docker run command. For example:

docker run -dt \
        --network host \
        -v $PWD/rti_license.dat:/opt/rti.com/rti_connext_dds-7.7.0/rti_license.dat \
        -v $PWD/MyReplayService.xml:/home/rtiuser/rti_workspace/7.7.0/user_config/replay_service/USER_REPLAY_SERVICE.xml \
        --name=replay_service \
        rticom/replay-service:latest \
        -cfgName MyReplayService \
        -verbosity WARN

The above example runs Replay Service with the verbosity level set to WARN.

To see the list of allowed parameters, use the -h parameter:

docker run --rm -t rticom/replay-service:latest -h

⁠Network configuration

The previous examples use the --network host parameter to run the containers in the host network. The host network is the most straightforward way to run the containers because it allows the containers to communicate with each other and with the host machine. However, the host network is not available on all platforms and has different levels of support depending on the operating system.

If you want to run the containers in a custom network isolated from the host network, you can create a custom network using docker network create and run the containers in that network. See the Docker networking overview documentation⁠ for more information on Docker networks.

If you want to make the containers accessible from outside the Docker environment without using the host network, the recommendation is to use RTI Real-Time WAN Transport and expose the necessary UDP ports using the -p option. For more information on RTI Real-Time WAN Transport, refer to the User’s Manual⁠. For more information on the -p option, refer to the Docker running containers documentation⁠.

This image does not provide built-in configuration for RTI Real-Time WAN Transport. If you want to use it, you will need to provide your own configuration file.

⁠Release Notes

Release notes for RTI Connext products are available on the RTI Community Portal at https://community.rti.com/documentation⁠. For patch release notes, contact our support team at [email protected]⁠ to request the relevant Release Notes Supplement. For Docker image release notes, check RTI’s Github containers repository at https://github.com/rticommunity/rticonnextdds-containers⁠.

⁠License

RTI® Replay Service is licensed under the following supplemental license terms and the Software License Agreement accompanying RTI Connext® Professional (https://www.rti.com/free-trial/terms⁠).

This image uses Ubuntu as the base image, and your usage must comply with the applicable license terms found here⁠.

You can find the Software Bill of Materials (SBOM) third-party information in SPDX format in the /user/local/share/sbom/ directory.

Additional third party information can be found at https://community.rti.com/documentation#doc_third_party⁠.

Use the following command to retrieve the RTI_License_Agreement_LM.pdf built-in file:

docker cp replay_service:/opt/rti.com/rti_connext_dds-7.7.0/RTI_License_Agreement_LM.pdf .

⁠How to get a license file

An RTI license file is always required to run Replay Service in a Docker container.

⁠Existing customers

If you are an RTI customer, and you need an RTI Connext license file, contact RTI support⁠.

⁠Evaluators

If you are not an RTI customer, visit https://www.rti.com/free-trial/connext⁠ to get an RTI Connext free trial for release 7.7.0 or higher. With the free trial you will receive a limited time license file that contains an activation key for RTI Connext Professional, RTI Security Plugins, RTI Real-Time WAN Transport, and RTI Cloud Discovery Service.

To get a free trial license for earlier releases, contact [email protected]⁠.

⁠RTI Supplemental License

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