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Installing the Envoy agent


  • A tCell account
  • Created a tCell application (Admin > Applications)
  • Allowed output HTTPS connections to the tCell cloud: What IPs do tCell agents connect to?
  • Downloaded the config file:
    1. Click on tCell Admin in top nav bar
    2. Click Download Agent
    3. Click on Web Server Agent
    4. Select Envoy agent
    5. Select Create New API Key (default)
    6. Click Download Config File to download the agent's config file (which is pre-populated with the application and API key information)
  • Docker installed.

Some tCell features are not available

OS Commands, Local FiIes, Packages & Vulns. features are not available with Envoy.


  1. The agent comes built-in to the Envoy binary. To download the agent, run:
docker pull rapid7/envoy-tcell:beta
  1. Update your envoy_config.yaml to include the tcell http filter. The docker image is configured to look for your config file at /etc/envoy/envoy_config.yaml. It will look similar to this:
- name: tcell
- name: envoy.filters.http.router
  1. Run the following (make sure to input your APPID and APIKEY):
docker run -d -p 8090:80 -e "TCELL_AGENT_APP_ID=APIID" -e "TCELL_AGENT_API_KEY=APIKEY" -v /host/path/envoy_config.yaml:/etc/envoy/envoy_config.yaml:ro -t rapid7/envoy-tcell


To verify that data is being sent to tCell go to your tCell console and confirm that the number of app server agents listed for the application you just created is more than 0.


In the Docker image, tCell logs to stdout. Find all errors by running docker logs.

Log level can be customized in tcell_agent.config file by adding a block, such as the following to the application section of the json:

"logging_options": {
    "enabled": true,
    "level": "INFO"

See tcell_agent.config.template for an example.

Valid log levels are:

INFO (default)

The preceding list indicates the precedence among the levels, from top to bottom. When you enable a log level, the higher log levels are also enabled. For example, if you enable WARN, then ERROR is also enabled.

When a log file becomes full, logging continues in a new log file. See Log Rolling for more information.

Updated 10 days ago


Installing the Envoy agent

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