Overview
LiveKit Cloud provides realtime logging for your deployed agents, helping you monitor performance, debug issues, and understand your agent's behavior in production. Logs are collected from all phases of your agent's lifecycle—from build to runtime—and can be forwarded to external monitoring services such as Datadog. You can also view some logs with the LiveKit CLI. LiveKit Cloud does not store runtime logs.
Log types
LiveKit Cloud collects two types of logs for your agents:
- Runtime logs: Your agent's app logs, including stdout, stderr, and any other logging you implement.
- Build logs: Output from the container build process, including Dockerfile execution and dependency installation.
Follow runtime logs
Use the LiveKit CLI to follow logs from your deployed agents in realtime.
lk agent logs
This command continuously streams logs from the latest running instance of your agent. It also includes a short snapshot of recent logs.
The LiveKit CLI only shows logs from the newest worker instance of your agent, which can include multiple jobs. All logs from this worker are included, but it is not a comprehensive view of all logs from all instances for agents running at scale. To collect logs from all instances, use the Datadog integration.
View build logs
Use the LiveKit CLI to view the Docker build logs from the currently deployed version of your agent.
lk agent logs --log-type=build
This command prints the logs to stdout, but does not perform a live tail.
Build logs from more versions of your agent are available in the LiveKit Cloud dashboard.
Forward runtime logs
Forward your agent logs to external monitoring services for long-term storage, advanced analytics, and integration with your existing observability stack.
Currently, the only supported external service is Datadog.
Datadog integration
Add a Datadog client token as a secrets to automatically enable log forwarding. If your account is in a region other than us1, you can also set the region. All runtime logs are automatically forwarded to your Datadog account.
lk agent update-secrets --secrets "DATADOG_TOKEN=your-client-token"
Your Datadog client token.
Your Datadog region. Supported regions are us1, us3, us5, us1-fed, eu, and ap1.
Log levels
Your agent worker configuration determines the log levels that are collected and forwarded. The default log level is INFO. To use a different value, set the log level in your Dockerfile:
CMD ["python", "agent.py", "start", "--log-level=DEBUG"]
For more information on log levels, see the worker options page.
Log retention
LiveKit Cloud does not store runtime logs. Build logs are stored indefinitely for the most recently deployed version.
Additional resources
The following resources may be helpful to design a logging strategy for your agent:
Logs, metrics, and telemetry
Guide to collecting logs, metrics, and telemetry data from your agent.
Worker options
Learn how to configure your agent worker.
Secrets management
Learn how to securely manage API keys for log forwarding.
Agents CLI reference
Reference for the agent deployment commands in the LiveKit CLI.