@lokalise/fastify-extras/dist/plugins/healthcheck/startupHealthcheckPlugin.js

Opinionated set of fastify plugins, commonly used in Lokalise

import { isError } from '@lokalise/node-core';
import fp from 'fastify-plugin';
import { stdSerializers } from 'pino';
import { resolveHealthcheckResults } from './commonHealthcheckPlugin.js';
async function executeHealthCheck(checker, app) {
    try {
        return await checker(app);
    }
    catch (err) {
        return { error: isError(err) ? err : new Error(String(err)) };
    }
}
const plugin = (app, opts, done) => {
    app.addHook('onReady', async () => {
        let isFullyHealthy = true;
        let isPartiallyHealthy = false;
        let healthChecks = {};
        const failedHealthchecks = [];
        if (opts.healthChecks.length) {
            const results = await Promise.all(opts.healthChecks.map(async (healthcheck) => {
                const result = await executeHealthCheck(healthcheck.checker, app);
                if (result.error) {
                    app.log.error({
                        error: stdSerializers.err(result.error),
                    }, `${healthcheck.name} healthcheck has failed`);
                }
                if (result.error) {
                    failedHealthchecks.push(healthcheck.name);
                }
                return {
                    name: healthcheck.name,
                    result,
                    isMandatory: healthcheck.isMandatory,
                };
            }));
            const resolvedHealthcheckResponse = resolveHealthcheckResults(results, opts);
            healthChecks = resolvedHealthcheckResponse.healthChecks;
            isFullyHealthy = resolvedHealthcheckResponse.isFullyHealthy;
            isPartiallyHealthy = resolvedHealthcheckResponse.isPartiallyHealthy;
        }
        const heartbeat = isFullyHealthy ? 'HEALTHY' : isPartiallyHealthy ? 'PARTIALLY_HEALTHY' : 'FAIL';
        const resultLog = {
            heartbeat,
            checks: healthChecks,
        };
        app.log[opts.resultsLogLevel ?? 'info'](resultLog, 'Healthcheck finished');
        if (!isPartiallyHealthy && !isFullyHealthy) {
            throw new Error(`Healthchecks failed: ${JSON.stringify(failedHealthchecks)}`);
        }
    });
    done();
};
export const startupHealthcheckPlugin = fp(plugin, {
    fastify: '5.x',
    name: 'startup-healthcheck-plugin',
});
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