Step 1 – Download & Install Grafana
Download Grafana RPM file RPM for Linux from https://grafana.com/grafana/download?platform=linux

# RHEL 7

$ sudo yum install initscripts fontconfig -y
$ wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana-5.2.2-1.x86_64.rpm
$ sudo yum localinstall grafana-5.2.2-1.x86_64.rpm

Step 2 – Understand Grafana Installation details in RHEL/CENTOS

1. Installs binary to /usr/sbin/grafana-server
2. Copies init.d script to /etc/init.d/grafana-server
3. Installs default file (environment vars) to /etc/sysconfig/grafana-server
4. Copies configuration file to /etc/grafana/grafana.ini
5. Installs systemd service (if systemd is available) name grafana-server.service
6. The default configuration uses a log file at /var/log/grafana/grafana.log
7. The default configuration specifies an sqlite3 database at /var/lib/grafana/grafana.db

Step 3 – Start the server (init.d service)

$ sudo service grafana-server start

This will start the grafana-server process as the grafana user, which is created during package installation. The default HTTP port is 3000, and default user and group is admin.

Step 4 – Configure the Grafana server to start at boot time

$ sudo /sbin/chkconfig --add grafana-server
$ sudo systemctl enable grafana-server.service
$ systemctl daemon-reload
$ systemctl start grafana-server
$ systemctl status grafana-server

Step 5 – Grafana server Environment file
The systemd service file and init.d script both use the file located at /etc/sysconfig/grafana-server for environment variables used when starting the back-end. Here you can override log directory, data directory and other variables.

Step 6 – Grafana server Log
By default Grafana will log to /var/log/grafana

Step 7 – Grafana Database
The default configuration specifies a sqlite3 database located at /var/lib/grafana/grafana.db. Please backup this database before upgrades.

You can also use MySQL or Postgres as the Grafana database, as detailed on
http://docs.grafana.org/installation/configuration/#database

Step 8 – Grafana configuration
The configuration file is located at /etc/grafana/grafana.ini. Go the Configuration page for details on all those options. You can add following data sources

1. Graphite
2. InfluxDB
3. OpenTSDB
4. Prometheus

Step 9 – Server side image rendering
Server side image (png) rendering is a feature that is optional but very useful when sharing visualizations, for example in alert notifications.

$ sudo yum install fontconfig -y
$ sudo yum install freetype* -y
$ sudo yum install urw-fonts -y

Step 10 – Browse the dashboard
http://X.X.X.X.:3000/
Username – admin
Password – admin

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How to Limit System Resources Using cgroups on CentOS 6?
Answer – Control groups, or cgroups

Great aricles –
www.digitalocean.com/community/tutorials…-cgroups-on-centos-6

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

The post How to Limit System Resources Using cgroups on CentOS 6 appeared first on scmGalaxy.

If your internet connection is behind a web proxy, you need to configure the following on your CentOS server:

System-wide proxy settings – add the following lines to your /etc/environment file:

# vi /etc/environment

http_proxy=”http://proxysrv:8080/”
https_proxy=”https://proxysrv:8080/”
ftp_proxy=”ftp://proxysrv:8080/”
no_proxy=”.mylan.local,.domain1.com,host1,host2″

To apply these settings without restarting the machine run the following commands on the bash shell:

export http_proxy="http://proxysrv:8080/"
export https_proxy="https://proxysrv:8080/"
export ftp_proxy="ftp://proxysrv:8080/"
export no_proxy=".mylan.local,.domain1.com,host1,host2"

You also need to configure yum:

# vi /etc/yum.conf

proxy=http://proxysrv:8080/

The post How to Configure Web Proxy on CentOS | Tutorials | scmGalaxy appeared first on scmGalaxy.

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