log4js-logmet-appender

node-log4js-logmet-appender

Logmet appender for node-log4js

Installation

npm i log4js-logmet-appender --save

Configuration

Set the following environment variables:

export log4js_logmet_enabled=true
export log4js_logmet_component=otc-api-local-test
export log4js_logmet_logging_token=<secureToken>
export log4js_logmet_space_id=<yourSpaceId>
export log4js_logmet_logging_host=logs.stage1.opvis.bluemix.net
export log4js_logmet_logging_port=9091

To get the secure token and space id see the instructions here: https://pages.github.ibm.com/alchemy-logmet/getting-started/authentication.html

Usage

You must be using log4js-node 3.x or 4.x, and must call log4js.configure('/path/to/log4js.json') somewhere in your code.

You must add the following to the list of appenders in your log4js.json file:

{
    "appenders": {
        "logmet": {
            "type": "log4js-logmet-appender",
        }
    },
    "categories": {
        "default": { "appenders": [ "logmet" ], "level": "info" },
    }
}

The appender supports custom layouts, the default layout function used is:

let layout = (logEvent) => {
    let instanceId = process.env.CF_INSTANCE_INDEX || require('os').hostname().replace(/^.*-([a-zA-Z0-9]+-[a-zA-Z0-9]+)$/g,'$1');
    let logmetEvent = {
        'component': process.env.log4js_logmet_component || config.component,
        'host-ip': process.env.CF_INSTANCE_IP,
        'instance-id': instanceId,
        'loglevel': logEvent.level.levelStr,
        'msg_timestamp': logEvent.startTime.toISOString(),
        'message': logEvent.data.join(' | '),
        'type': logEvent.categoryName
    };
    return logmetEvent;
};

Each key will mapped to a field name in Logmet.

Pending work

No automated tests currently

License

The MIT License (MIT)

Contributing

Contributions are welcome via Pull Requests. Please submit your very first Pull Request against the Developer's Certificate of Origin, adding a line like the following to the end of the file... using your name and email address of course!

Signed-off-by: John Doe <[e-mail]>