OpenAgent Release Notes

Latest Version: 1.8.9

2026-09-30

v1.8.9

Changed Collects metric names and TYPE metadata even when the Prometheus text response contains no HELP.

• Merges metadata regardless of the order in which HELP and TYPE are declared.
• Registers valid samples that also lack TYPE as untyped.
• Existing metric values, labels, timestamps, and relabel behavior remain unchanged.

2026-07-30

v1.8.6

Fixed Fixed an issue where query parameter values were applied twice when params was set on a scrape target.

• Applies to all target types that use params (StaticEndpoints, ServiceMonitor, PodMonitor).

2026-07-09

v1.8.5

New Added Authorization (Bearer) header authentication for scrape targets

• Added support for authenticating Prometheus scrape targets with an Authorization header, configured via an authorization block on the endpoint in scrape_config.yaml.
• The scheme (type) defaults to Bearer, and a custom scheme can be specified (e.g. Token, ApiKey).
• Supports 4 credential sources (priority: inline → environment variable → file → Secret, first valid value used): credentials, credentialsEnv, credentialsFile, credentialsSecret.
• Authentication priority is Authorization → Basic Auth → K8s ServiceAccount token; when authorization is configured, the ServiceAccount token fallback is suppressed.
• Added file-based sources for Basic Auth (usernameFile, passwordFile).
• Usage examples

  # 1) Inline
  authorization:
    type: Bearer # defaults to Bearer if omitted
    credentials: "my-secret-token"
  
  # 2) Environment variable (uses $OPENAGENT_SCRAPE_TOKEN)
  authorization:
    type: Bearer
    credentialsEnv: OPENAGENT_SCRAPE_TOKEN
  
  # 3) File (supports token rotation)
  authorization:
    type: Bearer
    credentialsFile: "secret/scrape_token"
  
  # 4) K8s Secret
  authorization:
    type: Bearer
    credentialsSecret:
      name: my-secret
      key: token
  
  # 5) Custom scheme (e.g. ApiKey) -> "Authorization: ApiKey abc123"
  authorization:
    type: ApiKey
    credentials: "abc123"

• Full endpoint configuration example

  features:
    openAgent:
      enabled: true
      targets:
        - targetName: token-exporter
          type: StaticEndpoints
          enabled: true
          endpoints:
            - address: "localhost:9530"
              path: "/metrics"
              scheme: "http"
              interval: "30s"
              authorization:
                type: Bearer
                credentialsFile: "secret/scrape_token"