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Use metrics to monitor performance

Enable the Prometheus monitoring and alerting service for Web3Signer metrics using the --metrics-enabled option.

Web3Signer provides metrics for secp256k1 and BLS12-381 key types.

Install Prometheus

To use Prometheus with Web3Signer, install the Prometheus main component. On MacOS, install with Homebrew:

brew install prometheus

Setting up and running Prometheus with Web3Signer

To configure Prometheus and run with Web3Signer:

  1. Configure Prometheus to poll Web3Signer. For example, add the following YAML fragment to the scrape_configs block of the prometheus.yml file:

    Example configuration

      scrape_interval: 15s
      - job_name: "prometheus"
        - targets: ["localhost:9090"]
      - job_name: "web3signer-dev"
        scrape_timeout: 10s
        metrics_path: /metrics
        scheme: http
        - targets: ["localhost:9001"]
  2. Start Teku by specifying the Web3Signer details.

  3. Start Web3Signer with the --metrics-enabled option.

    web3signer --key-store-path=/Users/me/keyFiles/ --metrics-enabled

    The HTTP, SIGNING, JVM, and PROCESS metrics categories are enabled by default. Use the --metrics-category command line option to update the available categories.

  4. In another terminal, run Prometheus specifying the prometheus.yml file:

    prometheus --config.file=prometheus.yml
  5. View the Prometheus graphical interface.

View Prometheus graphical interface

  1. Open a web browser to http://localhost:9090 to view the Prometheus graphical interface.

  2. Choose Graph from the menu bar and click the Console tab below.

  3. From the Insert metric at cursor drop-down, select a metric and click Execute. The values display.

The following Web3Signer metrics are available.

Filecoin JSON RPC metrics:

Name Definition
<keytype>_signing_request_count Number of signing requests made for the key type.
wallet_list_count Number of Filecoin.WalletList API requests received.
wallet_has_count Number of Filecoin.WalletHas API requests received.
wallet_sign_message_count Number of Filecoin.WalletSignMessage API requests received.
wallet_sign_duration The duration of signing operations.
total_request_count Total number of Filecoin requests received.

HTTP API metrics:

Name Definition
<keytype>_malformed_request_count Number of requests received which had illegally formatted body.
<keytype>_signing_duration Duration of a signing event.
<keytype>_missing_identifier_count Number of signing requests for which no keys were available.
signers_loaded_count Total number of SECP256k1 and BLS12-381 keys loaded.
signing_private_key_retrieval_time Time taken to retrieve BLS signing keys.

Eth2 Slashing protection metrics:

Name Definition
permitted_signings The number of slashing checks which have reported ‘safe to sign’.
prevented_signings The number of prevented signings due to violation of slashing conditions.

Visualize collected data

Use Grafana to visualize the collected data. See the sample Web3Signer Grafana dashboard.

Questions or feedback? You can discuss issues and obtain free support on Web3Signer Discord channel.
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