Relax-and-Recover (ReaR) configuration || Backup and Recover Linux System With ReaR

-

Relax-and-Recover (ReaR) configuration


Introduction:

Relax-and-Recover is the leading Open Source bare metal disaster recovery solution. It is a modular framework with many ready-to-go workflows for common situations.

Relax-and-Recover produces a bootable image which can recreate the system’s original storage layout. Once that is done it initiates a restore from backup. Since the storage layout can be modified prior to recovery, and disimilar hardware and virtualization is supported, Relax-and-Recover offers the flexibility to be used for complex system migrations.

Currently Relax-and-Recover supports various boot media (incl. ISO, PXE, OBDR tape, USB or eSATA storage), a variety of network protocols (incl. sftp, ftp, http, nfs, cifs) as well as a multitude of backup strategies (incl. IBM TSM, Micro Focus Data Protector, Symantec NetBackup, EMC NetWorker [Legato], SEP Sesam, Galaxy [Simpana], Bacula, Bareos, RBME, rsync, duplicity, Borg).

Relax-and-Recover was designed to be easy to set up, requires no maintenance and is there to assist when disaster strikes. Its setup-and-forget nature removes any excuse for not having a disaster recovery solution implemented.

Recovering from disaster is made very straight-forward by a 2-step recovery process so that it can be executed by operational teams when required. When used interactively (e.g. when used for migrating systems), menus help make decisions to restore to a new (hardware) environment.

Extending and integrating Relax-and-Recover into complex environments is made possible by its modular framework. Consistent logging and optionally extended output help understand the concepts behind Relax-and-Recover, troubleshoot during initial configuration and help debug during integration.

check my youtube video "Relax-and-Recover (ReaR) configuration" for your reference.


Download ReaR RPM package from the official site: https://relax-and-recover.org/download/
  • Install nfs-utils, cifs-utils, rsync package if required

Install Downloaded RPM package:

#zypper install /rear#Package Name#.rpm  <--- For SuSE

#yum install /rear#Package Name#.rpm       <--- For RedHat/CentOS

# apt install ./rear#Package Name#.rpm       <--- For Ubuntu


Open and pest below mentioned details in local.conf main config file.

#vim /etc/rear/local.conf

    OUTPUT=ISO
    OUTPUT_URL=file:///rear/
    BACKUP=NETFS
    BACKUP_URL=iso:///rear/

    ##### If you have extarnal disk mounted on server ####
    # Replace mount point path #
    EXCLUDE_MOUNTPOINTS=( '/rear1/*' '/rear2/*' )
    # Replace VG name
    EXCLUDE_VG=( ' vg0 ' )


Make a system backup (OS and user data) with below command:

#rear mkbackup -v 

Checking ISO image in /rear directory:

#ls -lh /rear


Copy this ISO image on a base system or safe please as a backup. If this Linux system will corrupt you can recover easily.


Recover:
  Corrupted Linux server

If the Linux system is corrupted you can follow the below steps to recover server:

1. Power off
2. Attach ReaR boot ISO image on your VMware or base system.
3. Setting in Boot menu to start CD-ROM drive first load in the boot.


4. Start server and select "Recover Rear-Demo" option

5. Login with root user and recover with "rear recover" command.

After all done, Disattach ReaR ISO image and start the server. Good news! Server back to normal with all data.


Lastly, I hope it's helpful. So, let me know your suggestions and feedback using the comment section.


   check my youtube video "Relax-and-Recover (ReaR) configuration" for your reference.

Comments

Post a Comment

Contact Form

Name

Email *

Message *

Popular posts from this blog

Red Hat Certified Systems Administrator – RHCSA (EX200) Ex@m practice 2022

-
Image
Red Hat Certified Systems Administrator – RHCSA (EX200) Ex@m practice 2022 Course Details RHCSA is an entry-level certification that focuses on actual competencies at system administration, including installation and configuration of a Red Hat Enterprise Linux system and attach it to a live network running network services. To achieve the RHCSA certification the student must pass  EX200 , a 2.5-hour hands-on lab exam. The minimum passing score for the exam is 21 0 out of 300 possible points (70%). There is no prerequisite for the exam, but Red Hat recommends preparing for the exam by taking courses in Red Hat System Administration (RH124 or RH134) if o ne does not have previous experienc e. RHCSA was launched in 2002 as Red Hat Certified Technician (RHCT). As of July 2009 there were 30,000 RHCTs. In November 2010 it was renamed to RHCSA. RHCSA E@AM Questions & Answers ********************************************** RHCSA-VM configuration: *you h
Read more

Step-by-Step Install and Configure OpenLDAP on RHEL7/CentOS 7 Linux

-
Image
OpenLDAP Server Configuration on RHEL7/Centos7 Lightweight Directory Access Protocol  ( LDAP  in short) is an industry-standard, lightweight, widely used set of protocols for accessing directory services. A directory service is a shared information infrastructure for accessing, managing, organizing, and updating everyday items and network resources, such as users, groups, devices, email addresses, telephone numbers, volumes, and many other objects. The  LDAP  information model is based on entries. An entry in a LDAP directory represents a single unit or information and is uniquely identified by what is called a  Distinguished Name  ( DN ). Each of the entry’s attributes has a type and one or more values. An attribute is a piece of information associated with an entry. The types are typically mnemonic strings, such as “ cn ” for common name, or “ mail ” for the email address. Each attribute is assigned one or more values consisting in a space-separated lis
Read more

Creating RAID-0 (Stripe) in Linux

-
Image
Creating RAID-0 (Stripe) on ‘Two Devices’ Using ‘mdadm’ Tool in Linux About RAID-0   RAID-0 is usually referred to as “striping.” This means that data in a RAID-0 region is evenly distributed and interleaved on all the child objects. For example, when writing 16 KB of data to a RAID-0 region with three child objects and a chunk-size of 4 KB, the data would be written as follows: 4 KB to object 0 4 KB to object 1 4 KB to object 2 4 KB to object 0 RAID 0 has High Performance. Zero Capacity Loss in RAID 0. No Space will be wasted. Zero Fault Tolerance ( Can’t get back the data if anyone of disk fails). Write and Reading will be Excellent. Requirements The minimum number of disks is allowed to create RAID 0 is  2 , but you can add more disk but the order should be twice as 2, 4, 6, 8. If you have a Physical RAID card with enough ports, you can add more disks. Install ‘ mdadm ‘ package: The mdadm is a small program, which will allow
Read more