/**
* Configuration module for the NewRelic MCP server
* Loads and validates environment variables
*/
export interface NewRelicConfig {
/** NewRelic User API key */
apiKey: string;
/** NewRelic Account ID */
accountId: string;
/** NewRelic region (US or EU) */
region: "US" | "EU";
}
export interface ServerConfig {
/** Server name for MCP identification */
name: string;
/** Server version */
version: string;
/** Log level */
logLevel: "debug" | "info" | "warn" | "error";
}
export interface Config {
newRelic: NewRelicConfig;
server: ServerConfig;
}
/**
* Required environment variables
*/
const REQUIRED_ENV_VARS = [
"NEW_RELIC_API_KEY",
"NEW_RELIC_ACCOUNT_ID",
] as const;
/**
* Validates that all required environment variables are present
* @throws Error if any required variable is missing
*/
function validateEnvVars(): void {
const missing: string[] = [];
for (const envVar of REQUIRED_ENV_VARS) {
if (!process.env[envVar]) {
missing.push(envVar);
}
}
if (missing.length > 0) {
throw new Error(
`Missing required environment variables: ${missing.join(", ")}`
);
}
}
/**
* Loads configuration from environment variables
* @returns Validated configuration object
*/
export function loadConfig(): Config {
validateEnvVars();
const region = (process.env.NEW_RELIC_REGION || "US").toUpperCase();
if (region !== "US" && region !== "EU") {
throw new Error(`Invalid NEW_RELIC_REGION: ${region}. Must be US or EU.`);
}
return {
newRelic: {
apiKey: process.env.NEW_RELIC_API_KEY!,
accountId: process.env.NEW_RELIC_ACCOUNT_ID!,
region: region as "US" | "EU",
},
server: {
name: process.env.SERVER_NAME || "newrelic-mcp-server",
version: process.env.SERVER_VERSION || "1.0.0",
logLevel: (process.env.LOG_LEVEL || "info") as
| "debug"
| "info"
| "warn"
| "error",
},
};
}
/**
* Global config instance - initialized once at startup
*/
let globalConfig: Config | null = null;
/**
* Gets the global configuration, loading it if necessary
*/
export function getConfig(): Config {
if (!globalConfig) {
globalConfig = loadConfig();
}
return globalConfig;
}
