1.
Munin
Munin is a network resource monitoring tool that can help
analyze resource trends and “what just happened to kill our performance?” Munin
graphs server performance over time, administrators can later use this
information to make an informed decision about when to add more resources.
1.1.
Install
Munin
Make
sure apache, PHP and MySQL are properly installed and are working on your webserver.
Since
Munin will be running on only one system we will need the master and client
installed on the same system. Following is command to download and install
munin
sudo aptitude install
munin munin-node
1.2.
Configure
Munin
When
the installation in complete, open the Munin configuration file with your text
editor of choice. Change the htmldir path from /var/cache/munin/www to /var/www/munin.
sudo vi /etc/munin/munin.conf
dbdir /var/lib/munin
htmldir /var/cache/munin/www
logdir /var/log/munin
rundir /var/run/Munin
New
Path.
htmldir /var/www/munin
Now
we need to move the Munin directory out of /var/cache/munin/www into /var/www/munin
with the help of the mv command.
sudo mv
/var/cache/munin/www/ /var/www/munin
Assign
the Munin directory right permissions and now you can start Munin.
sudo
/etc/init.d/munin-node start
Munin
can be accessed by pointing the web browser to:
2.
Monit
Monit is a free open source utility for managing and
monitoring, processes, files, directories and file systems on a UNIX system.
Monit conducts automatic maintenance and can send alert emails in error
situations.
2.1.
Install
Monit
sudo apt-get install monit
2.2.
Edit
the Monit Config File
cd /etc/monit
sudo vi monitrc
2.3.
Enable
the web interface
set
httpd port 2812
allow admin:pa$$w0rd # require user 'admin' with password 'pa$$w0rd'
allow admin:pa$$w0rd # require user 'admin' with password 'pa$$w0rd'
2.4.
Start
Monit
sudo
service monit start
2.5.
Setup email alerts
set mailserver localhost
set mail-format { from: monit@myserver.domain.com }
set alert sysadmin@domain.com
2.6.
Monitor the machine itself
check system myserver.domain.com
if loadavg (1min) > 4 then alert
if loadavg (5min) > 3 then alert
if memory usage > 75% then alert
if cpu usage (user) > 70% then alert
if cpu usage (system) > 30% then alert
if cpu usage (wait) > 20% then alert
3.
New
Relic
New Relic is the all-in-one web application performance tool
that lets you see performance from the end user experience, through servers,
and down to the line of application code. Following are steps to install new
relic.
Create free account on www.newrelic.com
3.1.
Configure
the New Relic apt repository.
Add the following line to
/etc/apt/sources.list.d/newrelic.list. (Create
the file if it does not already exist.)
deb
http://apt.newrelic.com/debian/ newrelic non-free
This
step only needs to be done once on each system.
3.2.
Trust
the New Relic GPG key.
This
step is required to register New Relic as an authenticated source where apt-get
will look for new packages. To get the New Relic public apt-key from global key
servers, run the following command as root:
wget
-O- http://download.newrelic.com/548C16BF.gpg | apt-key add -
Note:
If you do not run this command as root, you may see an error message about the
public key. If this occurs, include "sudo" in the command:
wget -O- http://download.newrelic.com/548C16BF.gpg | sudo apt-key add -
3.3.
Update the local package list
Execute the following command as
root:
apt-get update
3.4.
Install
the Server Monitor
Execute the following command as
root:
apt-get
install newrelic-sysmond
If you see a warning about your
license key at this point, you may ignore it.
3.5.
Configure your New Relic license key.
Your license key
appears in the Account Information section of your New Relic Account Settings
page. Execute the following command as root. (This step only needs to be done
once on each system.)
nrsysmond-config --set license_key=YOUR_LICENSE_KEY
Optional:
You can set the
license_key
configuration setting directly in /etc/newrelic/nrsysmond.cfg instead.
3.6.
Start
nrsysmond.
Execute the following command as
root:
/etc/init.d/newrelic-sysmond
start
Verify
that a message indicates that nrsysmond has started successfully. Your
server statistics will start being reported in the Servers area of your
New Relic dashboard.
3.7.
Uninstalling
To uninstall New Relic, execute the following
command as root:
For apt:
apt-get
remove newrelic-sysmond
4.
Htop
sudo
apt-get install htop
