elastic-search-rest-log

Dependency-less http methods for pure nodejs. The motive for this project was for have a simple logger with elastic search without depending on any driver o special software.

How to install

npm install --save elastic-search-rest-log

ElasticSearchRestLogger

Logger class

Options

• host: Url where the elastic search server is hosted. Default: localhost.
• port: port throught which the elastic search server is exposed. Default: 9200.
• logType: Used to create the index name. It's objective is to identify the project using the logger.
• logIndexTemplate: The template object used to create the Elastic Search template.
• logIndexTemplateName: Name for the template to be created on Elastic Search.
• consoleLogger: Enables a console logger that prints on the console in parallel to the Elastic Search logging. Default: True.

Methods

• init(): Verifies that the index and the template for the logs exist

• getIndexName(): Obtains the log index name. By default, it follows the following format log-${this.logType}-${day}-${month}-${year}, if it does not satisfy your requirements, this method should be overriden.

• verifyTemplateExists(): Verifies if the template exists. If not, it calls the createTemplate() method.

• createTemplate(): Creates the elastic Search template.

• verifyIndexExists(): Verifies if the index exists. If not, it calls the createIndex() method.

• createIndex(): Creates the elastic Search index.

• log(level, data): Makes a post call to create the log in elastic search. If data is a simple string, it will be included in the message property of the log. If not, it will merge data with the default logger object.

• info(data): Alias for the log method with info as the log level.

• warn(data): Alias for the log method with warn as the log level.

• error(data): Alias for the log method with error as the log level.

Examples

Initialization

const ElasticSearchRestLogger = require('elastic-search-rest-log');

const logger = new ElasticSearchRestLogger(loggerOptions);
logger.init().then(() => {
    server.listen(port);
    server.on('error', onError);
    server.on('listening', () => {
        var addr = server.address();
        var bind = typeof addr === 'string' ?
            'pipe ' + addr :
            'port ' + addr.port;
        logger.info(`Listening on ${bind}`);
    });
})

Output

If the passed to the log method was a string:

{
"message": "Listening on port 3000",
"level": "info",
"timestamp": "2018-10-11T07:54:50.906Z"
}



If the passed to the log method was { "foo": "fighter", "bohemian": "rhapsody" } :
```json
{
"foo": "fighter",
"bohemian": "rhapsody",
"level": "info",
"timestamp": "2018-10-11T07:54:50.906Z"
}