Add --telemetry-service-name CLI flag for OpenTelemetry service name override (#7903)

Allows users to customize the OpenTelemetry service name instead of using the hardcoded default `lighthouse`. Defaults to 'lighthouse-bn' for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse' for other subcommands.

This is useful when analysing traces from multiple nodes, see Grafana screenshot below with service name overrides in Kurtosis (`ethereum-package` PR: https://github.com/ethpandaops/ethereum-package/pull/1160):

<img width="1148" height="627" alt="image" src="https://github.com/user-attachments/assets/7e875639-10f7-4756-837f-2006fa4b12e0" />

book/src/help_bn.md

@@ -395,6 +395,10 @@ Options:
       --telemetry-collector-url <URL>
           URL of the OpenTelemetry collector to export tracing spans (e.g.,
           http://localhost:4317). If not set, tracing export is disabled.
+      --telemetry-service-name <NAME>
+          Override the OpenTelemetry service name. Defaults to 'lighthouse-bn'
+          for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse'
+          for other subcommands.
       --trusted-peers <TRUSTED_PEERS>
           One or more comma-delimited trusted peer ids which always have the
           highest score according to the peer scoring system.

book/src/help_general.md

@@ -79,6 +79,10 @@ Options:
       --telemetry-collector-url <URL>
           URL of the OpenTelemetry collector to export tracing spans (e.g.,
           http://localhost:4317). If not set, tracing export is disabled.
+      --telemetry-service-name <NAME>
+          Override the OpenTelemetry service name. Defaults to 'lighthouse-bn'
+          for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse'
+          for other subcommands.
   -V, --version
           Print version
 

book/src/help_vc.md

@@ -137,6 +137,10 @@ Options:
       --telemetry-collector-url <URL>
           URL of the OpenTelemetry collector to export tracing spans (e.g.,
           http://localhost:4317). If not set, tracing export is disabled.
+      --telemetry-service-name <NAME>
+          Override the OpenTelemetry service name. Defaults to 'lighthouse-bn'
+          for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse'
+          for other subcommands.
       --validator-registration-batch-size <INTEGER>
           Defines the number of validators per validator/register_validator
           request sent to the BN. This value can be reduced to avoid timeouts

book/src/help_vm.md

@@ -80,6 +80,10 @@ Options:
       --telemetry-collector-url <URL>
           URL of the OpenTelemetry collector to export tracing spans (e.g.,
           http://localhost:4317). If not set, tracing export is disabled.
+      --telemetry-service-name <NAME>
+          Override the OpenTelemetry service name. Defaults to 'lighthouse-bn'
+          for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse'
+          for other subcommands.
 
 Flags:
       --disable-log-timestamp

book/src/help_vm_create.md

@@ -96,6 +96,10 @@ Options:
       --telemetry-collector-url <URL>
           URL of the OpenTelemetry collector to export tracing spans (e.g.,
           http://localhost:4317). If not set, tracing export is disabled.
+      --telemetry-service-name <NAME>
+          Override the OpenTelemetry service name. Defaults to 'lighthouse-bn'
+          for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse'
+          for other subcommands.
 
 Flags:
       --disable-deposits

book/src/help_vm_import.md

@@ -76,6 +76,10 @@ Options:
       --telemetry-collector-url <URL>
           URL of the OpenTelemetry collector to export tracing spans (e.g.,
           http://localhost:4317). If not set, tracing export is disabled.
+      --telemetry-service-name <NAME>
+          Override the OpenTelemetry service name. Defaults to 'lighthouse-bn'
+          for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse'
+          for other subcommands.
       --validators-file <PATH_TO_JSON_FILE>
           The path to a JSON file containing a list of validators to be imported
           to the validator client. This file is usually named "validators.json".

book/src/help_vm_move.md

@@ -85,6 +85,10 @@ Options:
       --telemetry-collector-url <URL>
           URL of the OpenTelemetry collector to export tracing spans (e.g.,
           http://localhost:4317). If not set, tracing export is disabled.
+      --telemetry-service-name <NAME>
+          Override the OpenTelemetry service name. Defaults to 'lighthouse-bn'
+          for beacon node, 'lighthouse-vc' for validator client, or 'lighthouse'
+          for other subcommands.
       --validators <STRING>
           The validators to be moved. Either a list of 0x-prefixed validator
           pubkeys or the keyword "all".