InfraClaude

Instructions

Implementation Reference

• src/tools/prometheus/targets.ts:4-34 (handler)

  The scrapeTargets function fetches target health information from the Prometheus API and formats it into a table.

  export async function scrapeTargets(): Promise<string> {
    const url = `${config.prometheusUrl}/api/v1/targets`;
    const res = await fetch(url);
    if (!res.ok) throw new Error(`Failed to fetch targets: ${res.status}`);
  
    interface Target { labels: Record<string, string>; scrapeUrl: string; health: string; lastScrape: string; lastError: string; }
    const data = (await res.json()) as { data: { activeTargets: Target[] } };
    const activeTargets = data.data?.activeTargets || [];
  
    if (activeTargets.length === 0) return "No active scrape targets found.";
  
    const headers = ["JOB", "ENDPOINT", "STATE", "LAST SCRAPE", "ERROR"];
    const rows = activeTargets.map((t: {
      labels: Record<string, string>;
      scrapeUrl: string;
      health: string;
      lastScrape: string;
      lastError: string;
    }) => [
      t.labels.job || "unknown",
      t.scrapeUrl,
      t.health,
      t.lastScrape ? new Date(t.lastScrape).toLocaleTimeString() : "N/A",
      (t.lastError || "").substring(0, 40),
    ]);
  
    const healthy = activeTargets.filter((t: { health: string }) => t.health === "up").length;
    const total = activeTargets.length;
  
    return `Scrape targets (${healthy}/${total} healthy):\n\n${formatTable(headers, rows)}`;
  }

• src/tools/prometheus/index.ts:43-46 (registration)

  The definition of the 'prom_targets' tool in the registerPrometheusTools function.

    name: "prom_targets",
    description: "Show Prometheus scrape target health status",
    inputSchema: { type: "object" as const, properties: {} },
  },

• src/tools/prometheus/index.ts:60-60 (handler)

  The mapping of 'prom_targets' to the scrapeTargets handler in handlePrometheusTool.

  case "prom_targets": return scrapeTargets();