有没有办法在Cloud函数上使用log4js输出日志

Question

我正在使用GCP的云函数。我想要实现的是通过log4js输出日志。

我知道并尝试过使用console.xxx((效果很好。

环境：-谷歌云功能-功能框架-nodejs10作为运行时

logger.js

const log4js = require('log4js');
const logger = exports = module.exports = {};
log4js.configure({
appenders: {
out: { type: 'console' },
trail: {
type: 'dateFile',
filename: './logs/trail',
pattern: '-yyyy-MMdd-hh.log',
alwaysIncludePattern: true
}
},
categories: {
default: { appenders: [ 'out' ], level: 'info' },
trail: { appenders: [ 'trail' ], level: 'DEBUG' }
}
})
logger.trail = log4js.getLogger('trail')

index.js

const { logger } = require('./logger');
exports.spTest = (pubSubEvent, context) => {
console.log('console.log should appear'); // => properly logged
logger.trail.error('logger should appear'); => doesn't show up
};

提前感谢！

Answer 1

根据官方文档链接：

云记录是Google Cloud的操作套件的一部分谷歌云中的产品。它包括日志存储、用户名为日志查看器的接口，以及用于管理日志的API程序化。

还有自定义堆栈驱动程序日志

云功能日志由StackDriver日志支持。您可以使用Node.js的StackDriver日志记录库，用于记录事件结构化数据，实现更轻松的分析和监控。

const { Logging } = require('@google-cloud/logging');
// ...
// Instantiate the StackDriver Logging SDK. The project ID will
// be automatically inferred from the Cloud Functions environment.
const logging = new Logging();
const log = logging.log('my-custom-log-name');
// This metadata is attached to each log entry. This specifies a fake
// Cloud Function called 'Custom Metrics' in order to make your custom
// log entries appear in the Cloud Functions logs viewer.
const METADATA = {
resource: {
type: 'cloud_function',
labels: {
function_name: 'CustomMetrics',
region: 'us-central1'
}
}
};
// ...
// Data to write to the log. This can be a JSON object with any properties
// of the event you want to record.
const data = {
event: 'my-event',
value: 'foo-bar-baz',
// Optional 'message' property will show up in the Firebase
// console and other human-readable logging surfaces
message: 'my-event: foo-bar-baz'
};
// Write to the log. The log.write() call returns a Promise if you want to
// make sure that the log was written successfully.
const entry = log.entry(METADATA, data);
log.write(entry);index.js

因此，我不认为您可以在云函数上使用log4js。