nodejs-health-checker
Version:
Simple Nodejs package to simplify applications based in Node, to trace the healthy of the pods
307 lines • 13.7 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.HealthcheckerDetailedCheck = exports.HealthcheckerSimpleCheck = void 0;
var types_1 = require("../interfaces/types");
var database_service_1 = require("../services/database-service");
var dynamodb_service_1 = require("../services/dynamodb-service");
var memcache_service_1 = require("../services/memcache-service");
var redis_service_1 = require("../services/redis-service");
var web_service_1 = require("../services/web-service");
/**
* HealthcheckerSimpleCheck perform a simple application check
* @returns ApplicationHealthSimple
*/
function HealthcheckerSimpleCheck() {
return {
status: "fully functional",
};
}
exports.HealthcheckerSimpleCheck = HealthcheckerSimpleCheck;
/**
* HealthcheckerDetailedCheck perform a check for each integration informed
*
* @param config ApplicationConfig
* @return ApplicationHealthDetailed
*/
function HealthcheckerDetailedCheck(config) {
return __awaiter(this, void 0, void 0, function () {
var promisesList, start, results, integrations;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
promisesList = [];
start = new Date().getTime();
config.integrations.forEach(function (item) {
switch (item.type) {
case types_1.HealthTypes.Redis:
promisesList.push(redisCheck(item));
break;
case types_1.HealthTypes.Memcached.toString():
promisesList.push(memcacheCheck(resolveHost(item)));
break;
case types_1.HealthTypes.Web:
promisesList.push(webCheck(resolveHost(item)));
break;
case types_1.HealthTypes.Dynamo:
promisesList.push(dynamoCheck(resolveHost(item)));
break;
case types_1.HealthTypes.Database:
promisesList.push(databaseCheck(resolveHost(item)));
break;
case types_1.HealthTypes.Custom:
promisesList.push(customCheck(item));
break;
}
});
return [4 /*yield*/, Promise.all(promisesList)];
case 1:
results = _a.sent();
integrations = results.map(function (item) { return item; });
return [2 /*return*/, {
name: config.name || "",
version: config.version || "",
status: !integrations.some(function (_a) {
var Status = _a.status;
return Status === false;
}),
date: new Date(),
duration: getDeltaTime(start),
integrations: integrations,
}];
}
});
});
}
exports.HealthcheckerDetailedCheck = HealthcheckerDetailedCheck;
/**
* redisCheck used to check all redis integrations informed
* @param config IntegrationConfig with redis parameters
*/
function redisCheck(config) {
return __awaiter(this, void 0, void 0, function () {
var start, result;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
start = new Date().getTime();
return [4 /*yield*/, (0, redis_service_1.checkRedisClient)(config)];
case 1:
result = _a.sent();
config.port = config.port || types_1.Defaults.RedisPort;
config.db = config.db || types_1.Defaults.RedisDB;
return [2 /*return*/, {
name: config.name,
kind: types_1.HealthIntegration.RedisIntegration,
status: result.status,
response_time: getDeltaTime(start),
url: resolveHost(config).host,
error: result.error,
}];
}
});
});
}
/**
* memcacheCheck used to check all Memcached integrations informed
* @param config IntegrationConfig with memcached parameters
*/
function memcacheCheck(config) {
return __awaiter(this, void 0, void 0, function () {
var start, check;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
start = new Date().getTime();
config.timeout = config.timeout || types_1.Defaults.MemcachedTimeout;
return [4 /*yield*/, (0, memcache_service_1.checkMemcachedClient)(config)];
case 1:
check = _a.sent();
return [2 /*return*/, {
name: config.name,
kind: types_1.HealthIntegration.MemcachedIntegration,
status: check.status,
response_time: getDeltaTime(start),
url: config.host,
error: check.error,
}];
}
});
});
}
/**
* memcacheCheck used to check all Memcached integrations informed
* @param config IntegrationConfig with memcached parameters
*/
function webCheck(config) {
return __awaiter(this, void 0, void 0, function () {
var start, result;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
start = new Date().getTime();
config.timeout = config.timeout || types_1.Defaults.WebTimeout;
return [4 /*yield*/, (0, web_service_1.checkWebIntegration)(config)];
case 1:
result = _a.sent();
return [2 /*return*/, {
name: config.name,
kind: types_1.HealthIntegration.WebServiceIntegration,
status: result.status,
response_time: getDeltaTime(start),
url: config.host,
error: result.error,
}];
}
});
});
}
function dynamoCheck(config) {
return __awaiter(this, void 0, void 0, function () {
var start, result;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
start = new Date().getTime();
config.timeout = config.timeout || types_1.Defaults.WebTimeout;
return [4 /*yield*/, (0, dynamodb_service_1.checkDynamodbClient)(config)];
case 1:
result = _a.sent();
return [2 /*return*/, {
name: config.name,
kind: types_1.HealthIntegration.DynamoDbIntegration,
status: result.status,
response_time: getDeltaTime(start),
url: config.host,
error: result.error,
}];
}
});
});
}
function databaseCheck(config) {
return __awaiter(this, void 0, void 0, function () {
var start, result;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
start = new Date().getTime();
config.timeout = config.timeout || types_1.Defaults.WebTimeout;
return [4 /*yield*/, (0, database_service_1.checkDatabaseClient)(config)];
case 1:
result = _a.sent();
return [2 /*return*/, {
name: config.name,
kind: types_1.HealthIntegration.DatabaseIntegration,
status: result.status,
response_time: getDeltaTime(start),
url: config.host,
error: result.error,
}];
}
});
});
}
/**
* Runs the custom checker function.
* Any exceptions are caught and error is sent as part of
* @param config IntegrationConfig for the custom function check
* @returns Integration result
*/
function customCheck(config) {
return __awaiter(this, void 0, void 0, function () {
var start, result, _a, error_1;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
start = new Date().getTime();
config.timeout = config.timeout || types_1.Defaults.WebTimeout;
_b.label = 1;
case 1:
_b.trys.push([1, 5, , 6]);
if (!config.customCheckerFunction) return [3 /*break*/, 3];
return [4 /*yield*/, config.customCheckerFunction()];
case 2:
_a = _b.sent();
return [3 /*break*/, 4];
case 3:
_a = { status: false, error: "No custom function present" };
_b.label = 4;
case 4:
result = _a;
return [2 /*return*/, {
name: config.name,
kind: types_1.HealthIntegration.CustomIntegration,
status: result.status,
response_time: getDeltaTime(start),
url: config.host,
error: result.error,
}];
case 5:
error_1 = _b.sent();
return [2 /*return*/, {
name: config.name,
kind: types_1.HealthIntegration.CustomIntegration,
status: false,
response_time: getDeltaTime(start),
url: config.host,
error: error_1,
}];
case 6: return [2 /*return*/];
}
});
});
}
/**
* used to concat host:port
* @param config IntegrationConfig
*/
function resolveHost(config) {
if (config.port) {
config.host += ":" + config.port;
}
return config;
}
/**
* Used to calculate all time deltas
* @param time is a Date().getTime()
*/
function getDeltaTime(time) {
return (new Date().getTime() - time) / 1000;
}
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