InfraClaude

Instructions

Implementation Reference

• src/tools/prometheus/alerts.ts:26-53 (handler)

  The implementation of the `alertRules` function, which fetches and formats Prometheus alert rules.

  export async function alertRules(): Promise<string> {
    const url = `${config.prometheusUrl}/api/v1/rules`;
    const res = await fetch(url);
    if (!res.ok) throw new Error(`Failed to fetch rules: ${res.status}`);
  
    const data = (await res.json()) as { data: { groups: Array<{ name: string; interval: string; rules: Array<{ type: string; name: string; state: string; labels: Record<string, string>; alerts: unknown[] }> }> } };
    const groups = data.data?.groups || [];
  
    const lines: string[] = ["Alert rules:"];
  
    for (const group of groups) {
      lines.push(`\nGroup: ${group.name} (interval: ${group.interval})`);
      const rules = (group.rules || []).filter((r: { type: string }) => r.type === "alerting");
  
      if (rules.length === 0) continue;
  
      const headers = ["RULE", "STATE", "SEVERITY", "ACTIVE"];
      const rows = rules.map((r: { name: string; state: string; labels: Record<string, string>; alerts: unknown[] }) => [
        r.name,
        r.state,
        r.labels?.severity || "N/A",
        String(r.alerts?.length || 0),
      ]);
      lines.push(formatTable(headers, rows));
    }
  
    return lines.join("\n");
  }

• src/tools/prometheus/index.ts:38-41 (registration)

  The registration definition for the "prom_alert_rules" tool.

    name: "prom_alert_rules",
    description: "List all Prometheus alert rules and their current state",
    inputSchema: { type: "object" as const, properties: {} },
  },

• src/tools/prometheus/index.ts:59-59 (handler)

  The switch case in handlePrometheusTool that calls the alertRules implementation.

  case "prom_alert_rules": return alertRules();