Install and Configure Grafana in RHEL 7

Install and Configure Grafana in RHEL 7

Step 1 – Download & Install Grafana
Download Grafana RPM file RPM for Linux from

# RHEL 7

$ sudo yum install initscripts fontconfig -y
$ wget
$ 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

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
Username – admin
Password – admin

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How to Limit System Resources Using cgroups on CentOS 6

rajeshkumar created the topic: How to Limit System Resources Using cgroups on CentOS 6

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

Great aricles –…-cgroups-on-centos-6

Rajesh Kumar
Twitt me @

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How to Configure Web Proxy on CentOS | Tutorials | 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


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,,host1,host2"

You also need to configure yum:

# vi /etc/yum.conf


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Vagrant installation in Centos, Ubuntu and Windows | Vagrant Tutorials

Vagrant installation in ubuntu
1. Update your apt repository
> sudo apt-get update
2. Install VirtualBox.
> sudo apt-get install virtualbox
3. Install Vagrant.
> sudo apt-get install vagrant
Vagrant installation in Centos
1. Update your system
> yum -y update
> cd etc/yum.repos.d/
> yum update -y
> yum install binutils qt gcc make patch libgomp glibc-headers glibc-devel kernel-headers kernel-devel
> dkms
> yum install virtualbox-5.0
2. Install Vagrant
> wget
> yum localinstall vagrant_1.8.1_x86_64.rpm
Vagrant installation in Windows
In this tutorial, we will be installing Vagrant, a bare bones server with Ubuntu installed. Vagrant is a server that runs under VirtualBox. You will need to have VirtualBox installed. You will also need to have Putty installed in order to access your new Vagrant server via SSH. These instructions also apply to Windows 8.
A hard connection to the Internet
Putty needs to be installed. (putty-0.62-installer.exe)
VirtualBox needs to be installed.
Recommended: 8 GB RAM is recommended to run VirtualBox on Windows PCs
A. Installing Vagrant – bare bones server – Ubuntu only
1. Download and install the most recent VirtualBox for Windows from
Start up VirtualBox
2. Download and install the latest version of Vagrant from For this tutorial, we will use version 1.0.6. Windows users, download Vagrant.msi
Open Windows cmd prompt
For Windows 8, press Windows key and then press “R” key. This will open the RUN dialog box for you. Type “cmd” and press Enter.
Note: I typed vagrant command and I got the error message saying, ‘vagrant’ command not recognized. It was not added to the Path during install. Restarting your computer may help to refresh the path.
3. Change directory to C:\vagrant\vagrant\bin
4. Then type the following commands:
C:\vagrant\vagrant\bin> vagrant box add lucid32
C:\vagrant\vagrant\bin> vagrant init lucid32
C:\vagrant\vagrant\bin> vagrant up
5. Open Putty and enter these credentials:
Port: 2222
Connection type: SSH
6. Login to Vagrant server
Enter username: vagrant
Password: vagrant
Type ls –lah at the prompt.
This is a bare bones server with Ubuntu installed.
vagrant@lucid32:~$ls -lah
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How to Install and Configure Gerrit2 in CentOs and Ubantu ?

Step 1:  Update System
> yum update
> apt-get update
Step 2: Install git
Step 3: Install screen
Step 4: Install screen
Step 5: Install Java
Step 6: MySQL
Step 7: Install Gerrit
1. Create a Database
2. Initialize the site
3. Download Gerrit
4. Start Gerrit Setup
5. Restart / Stop / Start gerrit
5. Access Gerrit
Step 8: Install Apache
Step 9: Configure Apache Proxy to Gerrit
Step 10: Verify
Some important Tools
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