Deep dive

From remote debugging to data discovery, learn how Formant works from top to bottom.

    Install agent from terminal

    This help page describes the process of installing the agent from the command line terminal. If you are interested in installing from our web interface, please visit our documentation on installing agent from web.

    Supported Systems

    We currently support xenial, bionic, stretch, and jessie on amd64, arm64, and arm.

    Repo Setup

    To get set up with Formant's Debian repository you will need to add our repo to the machine's source list:

    sudo echo "deb https://repo.formant.io/formant/debian $(lsb_release -cs) main" >>/etc/apt/sources.list


    Next, add Formants gpg key:

    sudo apt-key adv --fetch-keys https://keys.formant.io/formant.pub.gpg

    Verify that you now have the key with the fingerprint, B7E5 E1C5 4CBF FE9B 9275  0DCD A0ED 2D6C C0E2 E57F, by searching for the last 8 characters of the fingerprint.

    sudo apt-key fingerprint C0E2E57F 
    
    
    pub   rsa2048 2020-03-11 [SC] [expires: 2022-03-11]
          B7E5 E1C5 4CBF FE9B 9275  0DCD A0ED 2D6C C0E2 E57F
    uid           [ unknown] Formant <support@formant.io>
    sub   rsa2048 2020-03-11 [E] [expires: 2022-03-11]

    Install the agent

    To install the agent you can simply run the following script. However, before running these steps, please see all the configuration options below.

    sudo apt update
    sudo apt install formant-agent

    Agent installation configuration

    Before installing the agent, there are several configuration options that can be set via debconf.

    Provisioning token

    If you are using a provisioning token for the installation it can be set with:

    echo formant-agent formant-agent/token password "<token>" | sudo debconf-set-selections

    Replace <token> with your token

    Provision with Formant credentials

    Using a token is preferred over using Formant Credentials for security reasons, however, we do allow the provisioning of agents with credentials. You can do this via:

    echo formant-agent formant-agent/email string "<email>" | sudo debconf-set-selections
    echo formant-agent formant-agent/password password "<password>" | sudo debconf-set-selections

    Replace <email> and <password> with your credentials.

    ROS master URI

    If you are on ROS you will need to setup the agent with the ROS Master URI:

    echo formant-agent formant-agent/ros_master_uri string "<ros_master_uri>" | sudo debconf-set-selections

    Replace <ros_master_uri> with the correct value.

    ROS catkin workspace

    The agent supports parsing of custom ROS message types, however we need to source the setup.bash file located within that workspace.

    echo formant-agent formant-agent/catkin_ws string "<catkin_ws>" | sudo debconf-set-selections

    Replace <catkin_ws> with the absolute path to your catkin workspace.

    Note: The agent assumes the setup.bash file is in /<catkin_ws>/devel/setup.bash. If your setup file is in a different location use source_script.

    Source Script

    To support custom locations of catkin workspace setup files, the agent allows a custom location for a script to source.

    echo formant-agent formant-agent/source_script string "<source_script>" | sudo debconf-set-selections

    Replace <source_script> with the absolute path to the script to source.

    System resources

    The agent installation supports setting parameters for system resource usage for cpu_quota and memory_limit

    Set these with:

    echo formant-agent formant-agent/cpu_quota string "<cpu_quota>" | sudo debconf-set-selections
    echo formant-agent formant-agent/memory_limit string "<memory_limit>" | sudo debconf-set-selections

    cpu_quota: The value of the CPUQuota parameter, which is expressed in percentage, specifies how much CPU time the unit gets at maximum, relative to the total CPU time available on one CPU.

    memory_limit: Use suffixes K, M, G, or T to identify Kilobyte, Megabyte, Gigabyte, or Terabyte as the unit of measurement.

    Service enable

    You can install the agent in a disabled state with the service_enable parameter. This is true by default.

    echo formant-agent formant-agent/service_enable boolean "<enable>" | sudo debconf-set-selections

    <enable> can be true or false.

    Disable auto-start on boot

    By default, we enable auto-start on boot for the Formant Agent. To disable auto-start on boot, run:

    systemctl disable formant-agent

    Port forwarding

    The agent supports port forwarding to power remote SSH, SCP, and other advanced networking tools. This can be controlled via configuration as well, however for security purposes we support disabling this at install time. This is true by default.

    echo formant-agent formant-agent/port_forwarding boolean "<enable>" | sudo debconf-set-selections

    <enable> can be true or false.

    OTA

    Formant also supports over-the-air updates of the agent via a separate Debian sidecar package called formant-sidecar.

    To enable OTA all you need to do is install this additional package:

    sudo apt update
    sudo apt install formant-sidecar

    By default, the agent creates a formant user and group on the host system with no sudo permissions. However, to perform upgrades the formant-sidecar adds restricted sudo capabilities to the formant user. When the package is installed you can see them at /etc/sudoers.d/formant

    The restricted permissions are:

    formant ALL=(ALL) NOPASSWD:/usr/bin/apt update, /usr/bin/apt install --upgrade-only -y formant-agent, /usr/bin




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