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Resitail

Stream residue server logs via various hooks

Quick start

• npm install -g resitail
• sudo resitail --config <config>

Notice the sudo, this is because all the files written by residue server will need sudo access as they may be owned by one user or another with limited permissions. Resitail needs to be able to read all of these log files.

Configuration

A configuration file looks like:

{
    "residue_config" : "<residue-config>",
    "hooks": [
    ... <see Connecting Hooks section below>
    ]
}

Creating Hook

Hook is essentially a JS module with following minimal requirements

• A class with options constructor
• A send function with data parameter.
• Export this class

Once connected resitail will use this send function to send the logs. A most commonly used hook is resitail-f.

Example:

"use strict";

function sampleHook (options) {
    this.options = options;

    this.send = (data) => {
        console.log(data);
    }
}

module.exports = (options) => new sampleHook(options);

Data contains following properties:

Property	Description
event	Event name (i.e, resitail:line, resitail:err)
event_type	Type of event (i.e, info, error)
line	Contents of event (either log line or error details etc)
channel	Type of channel (i.e, client or logger)
channel_name	Name of channel (i.e, client_id or logger_id)
logger_id	Logger ID if channel is client
client_id	Client ID if channel is logger

Connecting Hook

Once hook is ready you can connect it by adding it to configuration.

{
    "name": "<hook name>",
    <path or package>
    "enabled": false,
    "config": {
        "channels" : {
            "to_client" : true,
            "to_logger" : true
        }
        ... more configs specific to hook
    }
}

A fully working hook configuration looks like:

From registry (notice package and version):

{
    "name": "resitail-f",
    "package": "resitail-f",
    "version": "latest"
    "enabled": true,
    "config": {
        "channels" : {
            "to_client" : true,
            "to_logger" : true
        }
        port: 3000
    }
}

This will install the package globally.

Local (notice path):

{
    "name": "resitail-f",
    "path": "../resitail-f",
    "enabled": true,
    "config": {
        "channels" : {
            "to_client" : true,
            "to_logger" : true
        }
        port: 3000
    }
}

Notes

• Please search for resitail-hook on NPM for available hooks
• Please check out sample hook to get started

License

Copyright 2017-present @abumq (Majid Q.)

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.