Alerta monitoring system

Christian Pradelli edited this page Jan 11, 2018 · 3 revisions

The alerta monitoring system is a tool used to consolidate and de-duplicate alerts from multiple sources for quick ‘at-a-glance’ visualisation. With just one system you can monitor alerts from many other monitoring tools on a single screen.

When receiving alerts from multiple sources you can quickly become overwhelmed. With Alerta any alert with the same environment and resource is considered a duplicate if it has the same severity. If it has a different severity it is correlated so that you only see the most recent one. Awesome.

main site http://www.alerta.io

We can send Netadata alarms to Alerta so yo can see in one place alerts coming from many Netdata hosts or also from a multihost Netadata configuration.
The big advantage over other notifications method is that you have in a main view all active alarms with only las state, but you can also search history.

Setting up an Alerta server with Ubuntu 16.04

Here we will set a basic Alerta server to test it with Netdata alerts.
More advanced configurations are out os scope of this tutorial.

source: http://alerta.readthedocs.io/en/latest/gettingstarted/tutorial-1-deploy-alerta.html

I recommend to set up the server in a separated server, VM or container.
If you have other Nginx or Apache server in your organization, I recommend to proxy to this new server.

Set us as root for easiest working

sudo su
cd

Install Mongodb https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/

apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 multiverse" | tee /etc/apt/sources.list.d/mongodb-org-3.6.list
apt-get update
apt-get install -y mongodb-org
systemctl enable mongod
systemctl start mongod
systemctl status mongod

Install Nginx and Alerta uwsgi

apt-get install -y python-pip python-dev nginx
pip install alerta-server uwsgi

Install web console

cd /var/www/html
mkdir alerta
cd alerta
wget -q -O - https://github.com/alerta/angular-alerta-webui/tarball/master | tar zxf -
mv alerta*/app/* .
cd

Services configuration

Create a wsgi python file

nano /var/www/wsgi.py

fill with

from alerta import app

Create uWsgi configuration file

nano /etc/uwsgi.ini

fill with

[uwsgi]
chdir = /var/www
mount = /alerta/api=wsgi.py
callable = app
manage-script-name = true

master = true
processes = 5
logger = syslog:alertad

socket = /tmp/uwsgi.sock
chmod-socket = 664
uid = www-data
gid = www-data
vacuum = true

die-on-term = true

Create a systemd configuration file

nano /etc/systemd/system/uwsgi.service

fill with

[Unit]
Description=uWSGI service

[Service]
ExecStart=/usr/local/bin/uwsgi --ini /etc/uwsgi.ini

[Install]
WantedBy=multi-user.target

enable service

systemctl start uwsgi
systemctl status uwsgi
systemctl enable uwsgi

Configure nginx to serve Alerta as a uWsgi application on /alerta/api

nano /etc/nginx/sites-enabled/default

fill with

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        location /alerta/api { try_files $uri @alerta/api; }
        location @alerta/api {
            include uwsgi_params;
            uwsgi_pass unix:/tmp/uwsgi.sock;
            proxy_set_header Host $host:$server_port;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        location / {
            root /var/www/html;
        }
}

restart nginx

service nginx restart

Config web console

nano /var/www/html/config.js

fill with

'use strict';

angular.module('config', [])
  .constant('config', {
    'endpoint'    : "/alerta/api",
    'provider'    : "basic",
    'colors'      : {},
    'severity'    : {},
    'audio'       : {}
  });

Config Alerta server

source: http://alerta.readthedocs.io/en/latest/configuration.html

Create a random string to use as SECRET_KEY

cat /dev/urandom | tr -dc A-Za-z0-9_\!\@\#\$\%\^\&\*\(\)-+= | head -c 32 && echo

will output something like

0pv8Bw7VKfW6avDAz_TqzYPme_fYV%7g

Edit alertad.conf

nano /etc/alertad.conf

fill with (take care about all single quotes)

BASE_URL='/alerta/api'
AUTH_REQUIRED=True
SECRET_KEY='0pv8Bw7VKfW6avDAz_TqzYPme_fYV%7g'
ADMIN_USERS=['<here put you email for future login>']

restart

systemctl restart uwsgi
  • go to console to http://yourserver/alerta/
  • go to Login -> Create an account
  • use your email for login so and administrative account will be created

create an API KEY

You need an API KEY to send messages from any source.
To create an API KEY go to Configuration -> Api Keys
Then create a API KEY with write permisions.

configure Netdata to send alarms to Alerta

In Netdata edit

nano /etc/netdata/health_alarm_notify.conf

set

# enable/disable sending alerta notifications
SEND_ALERTA="YES"

# here set your alerta server API url
# this is the API url you defined when installed Alerta server, 
# it is the same for all users. Do not include last slash.
ALERTA_WEBHOOK_URL="http://yourserver/alerta/api"

# Login with an administrative user to you Alerta server and create an API KEY
# with write permissions.
ALERTA_API_KEY="you last created API KEY"

# you can define environments in /etc/alertad.conf option ALLOWED_ENVIRONMENTS
# standard environments are Production and Development
# if a role's recipients are not configured, a notification will be send to
# this Environment (empty = do not send a notification for unconfigured roles):
DEFAULT_RECIPIENT_ALERTA="Production"

Test alarms

We can test alarms with standard

sudo su -s /bin/bash netdata
/opt/netdata/netdata-plugins/plugins.d/alarm-notify.sh test
exit

But the problem is that Netdata will send 3 alarms, and because last alarm is "CLEAR" you will not se them in main Alerta page, you need to select to see "closed" alarma in top-right lookup.

A little change in alarm-notify.sh that let us test each state one by one will be useful.

General


Running Netdata

Special Uses

Notes on memory management


Database Replication and Mirroring


Backends
archiving netdata collected metrics to a time-series database


Health monitoring - Alarms
alarms and alarm notifications in netdata


Netdata Registry


Monitoring Info


Netdata Badges


Data Collection

Binary Modules

Python Modules

Node.js Modules

BASH Modules

Active BASH Modules

Obsolete BASH Modules

JAVA Modules


API Documentation


Web Dashboards


Running behind another web server


Package Maintainers


Donations


Blog


Other monitoring tools

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