New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# alerta.io notifications
+
+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.
+
+![](http://docs.alerta.io/en/latest/_images/alerta-screen-shot-3.png)
+
+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
+
+On your system run:
+
+```
+/etc/netdata/edit-config health_alarm_notify.conf
+```
+
+and 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.
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