ゾーン かたな ZONEKATANA

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HAProxy implementation Case Study This tutorial covers HAProxy Deployment on Firewall and SELinux enabled Centos7 systems. First of all lets get an overall idea about my situation.  I've bought a domain call mycompany.com so all of my  hosted sites should be followed by this main domain. As an example, if someone look for london.mycompany.com he should reach to London server, if someone look for chicago.mycompany.com he should reach to Chicago server So, I've created a Cloudflare account and point mycompany.com to our public IP address and created two                 CNAME entries from Cloudflare by adding London and Chicago. From the Cloudflare all the request to mycompany.com will forward to our public address and HAProxy may read those requests and Process them and forward them accordingly between two IIS servers. Note that al...

Root Password recovery In this tutorial I will demonstrate you how to recover you lost password. This tutorial is for RHEL 7 Password recovery. Before we go further I would like to brief Linux boot process, When pushed power button your PC/Server it will powered on and the system firmware will runs POST (Power On Self Test) which will check and initiate attached hardware. You can do modifications to these process by BIOS/UFFI configuration After POST, system firmware will look for bootable device in other words it look for Master Boor Record (MBR) Then the System will reads the boot loader from the disk and let boot loader to take control of the system Now the boot loader loads its configuration from disk, at that point you may display the boot options Depends on your selection boot loader will load the kernel and initramfs from disk to you memory(RAM). Initramfs  is some gziped archive contains kernel modules for hardware all hardware w...

This Document covers asterisk basic installation on docker. Since till now there is no official asterisk image on Docker hub we will use Debian core to install the asterisk. Prerequisites Linux host to install docker, Internet connectivity and docker account to download docker images. 1. Installing Docker (Ensure your Internet connectivity) Centos 7           #wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm           #rpm -ivh epel-release-latest-7.noarch.rpm           #yum install docker  Install Docker on RHEL and CentOS 6          # yum install epel-release          # yum install docker-io 2. Start Docker Centos 7          # systemctl start docker          # systemctl status docker          # systemctl enable docker ...

FreePBX-Installation 1. Pre-installation In order to setup call center server first we have to confirm that our system is full filled the minimum requirements. This asterisk deployment is based on RedHat distribution aka CentOS.  To full-fill the above requirement we are going to setup asterisk 11 on CentOS 6.5 (x64). 1.2 CentOS 6.5x64 installation  It is recommended to install CentOS 6.5x64 minimum version and manually install all the other package as our requirement.  At the beginning it recommended to configure the logical disk drives aka Raid.  Note that some of the server-rigs will not compatible to centos 6.5x64, most of the time it’s because the particular server’s Raid drivers might not be found in centos 6.5x64 disk. In such scenario please follow the below instruction. First we have to download the Raid driver from relevant vendor. (If it’s HP you will find somewhat like this hpvsa-X.X.X-X.rhel6u.5x86_64.dd). ...