linux Archives - Apostolidis Cloud Corner

Azure VM | Add Multiple Data Disks v2

Pantelis Apostolidis — Fri, 02 Jul 2021 08:26:54 +0000

This is a new version of my previous script Add multiple managed disks to Azure RM VM

Changes:

- Shows the disk capacity of the VM and asks how many disks to add.
- Prompts for the size of every disk
- Checks for empty Luns to add the disks

# 1. You need to login to the Azure Rm Account

Login-AzAccount

# 2. The script will query the Subscriptions that the login account has access and will promt the user to select the target Subscription from the drop down list
 
$subscription = Get-AzSubscription | Out-GridView -Title "Select a Subscription" -PassThru
Select-AzSubscription -SubscriptionId $subscription.Id

# 3. The script will query the available VMs and promt to select the target VM from the VM list
 
$vm = Get-AzVM | Out-GridView -Title "Select the Virtual Machine to add Data Disks to" -PassThru

# 4. I set the storage type based on the OS disk. If you want to spesify somehting else you can cahnge this to: $storageType = StandardLRS or PremiumLRS etc.

$storageType = $VM.StorageProfile.OsDisk.ManagedDisk.StorageAccountType

# 5. Enter how many data disks you need to create

$VMdiskCapacity = ($VM.StorageProfile.DataDisks).Capacity
 
$diskquantity = Read-Host "How many disks you need to create? Max Capacity" $VMdiskCapacity "."

# 6. The script will promt for disk size, in GB

$diskSizeList = @()
for($i = 1; $i -le $diskquantity; $i++)
{
    $disk = (Read-Host "Disk " $i " Size")
    $diskSizeList += $disk
}
$diskSizeList

# 7. check for exisiting disks

$existinglun = @()
for($i = 0; $i -lt $VMdiskCapacity; $i++) {
    $existinglun += ($VM.StorageProfile.DataDisks)[$i].Lun
}

# 8. disks creation

for($i = 0; $i -lt $diskquantity; $i++)
{
$diskName = $vm.Name + "-DataDisk-" + $i.ToString()
$diskConfig = New-AzDiskConfig -AccountType $storageType -Location $vm.Location -CreateOption Empty -DiskSizeGB $diskSizeList[$i]
$DataDisk = New-AzDisk -DiskName $diskName -Disk $diskConfig -ResourceGroupName $vm.ResourceGroupName
for ($j = 0; $j -lt $VMdiskCapacity; $j++) {
    if ( $null -eq $existinglun[$j] ) {
        $nextLunIndex
        for ($k = 0; $k -lt $VMdiskCapacity; $k++ ) {
            $nextLunIndex = $k
            for ( $m = 0; $m -lt $VMdiskCapacity; $m++ ) {
                if ( $k -eq $existinglun[$m] ) {
                    $nextLunIndex = -1 
                    break 
                }
            }
            if ($nextLunIndex -ne -1 ) {
                break
            }
        }
        Add-AzVMDataDisk -VM $vm -Name $DiskName -CreateOption Attach -ManagedDiskId $DataDisk.Id -Lun $nextLunIndex
        $existinglun[$j] = $nextLunIndex
        break
    } 
}
}
Update-AzVM -VM $vm -ResourceGroupName $vm.ResourceGroupName

You can download the script from: https://github.com/proximagr/automation/blob/master/Add-DataDisks-DIffSize_v3.ps1

Pantelis Apostolidis

Pantelis Apostolidis is a Sr. Specialist, Azure at Microsoft and a former Microsoft Azure MVP. For the last 20 years, Pantelis has been involved to major cloud projects in Greece and abroad, helping companies to adopt and deploy cloud technologies, driving business value. He is entitled to a lot of Microsoft Expert Certifications, demonstrating his proven experience in delivering high quality solutions. He is an author, blogger and he is acting as a spokesperson for conferences, workshops and webinars. He is also an active member of several communities as a moderator in azureheads.gr and autoexec.gr. Follow him on Twitter @papostolidis.

www.cloudcorner.gr

The post Azure VM | Add Multiple Data Disks v2 appeared first on Apostolidis Cloud Corner.

Playing windows games or using windows software in Ubuntu

Pantelis Apostolidis — Fri, 26 Sep 2014 09:33:42 +0000

Very useful for anyone moving to Linux but missing Windows games. Thanks!

Pantelis Apostolidis

www.cloudcorner.gr

The post Playing windows games or using windows software in Ubuntu appeared first on Apostolidis Cloud Corner.

Linux free Backup and Clone (imaging) Solution

Pantelis Apostolidis — Thu, 25 Sep 2014 07:31:37 +0000

This is a guide on how to Backup/Clone a Linux system to a Bootable ISO file using the free Mondo Rescue Disaster Recovery Tool

Mondo Rescue is an open source, free disaster recovery and backup utility that allows you to easily create complete system (Linux or Windows) Clone/Backup ISO Images to CD, DVD,Tape, USB devices, Hard Disk, and NFS. And can be used to quickly restore or redeploy working image into other systems, in the event of data loss, you will be able to restore as much as entire system data from backup media.

Mondo program is available freely for download and released under GPL (GNU Public License) and has been tested on a large number of Linux distributions.

Installation of Mondo Rescue

Installing MondoRescue on RHEL / CentOS / Scientific Linux

The latest Mondo Rescue packages can be obtained from the “MondoRescue Repository“. Use “wget” command to download and add repository under your system. The Mondo repository will install suitable binary software packages such as afio, buffer, mindi, mindi-busybox, mondo and mondo-doc for your distribution, if they are available.

For RHEL/CentOS/SL 6,5,4 – 32-Bit

Download the MondoRescue repository under “/etc/yum.repos.d/” as file name “mondorescue.repo“. Please download correct repository for your Linux OS distribution version.

# cd /etc/yum.repos.d/

## On RHEL/CentOS/SL 6 – 32-Bit ##

# wget ftp://ftp.mondorescue.org/rhel/6/i386/mondorescue.repo

## On RHEL/CentOS/SL 5 – 32-Bit ##

# wget ftp://ftp.mondorescue.org/rhel/5/i386/mondorescue.repo

## On RHEL/CentOS/SL 4 – 32-Bit ##

# wget ftp://ftp.mondorescue.org/rhel/4/i386/mondorescue.repo

For RHEL/CentOS/SL 6,5,4 – 64-Bit

# cd /etc/yum.repos.d/

## On RHEL/CentOS/SL 6 – 64-Bit ##

# wget ftp://ftp.mondorescue.org/rhel/6/x86_64/mondorescue.repo

## On RHEL/CentOS/SL 5 – 64-Bit ##

# wget ftp://ftp.mondorescue.org/rhel/5/x86_64/mondorescue.repo

## On RHEL/CentOS/SL 4 – 64-Bit ##

# wget ftp://ftp.mondorescue.org/rhel/4/x86_64/mondorescue.repo

Once you successfully added repository, do “yum” to install latest Mondo tool.

# yum install mondo

Installing MondoRescue on Debian / Ubuntu / Linux Mint

Debian user’s can do “wget” to grab the MondoRescue repository for Debain 6 and 5 distributions. Run the following command to add “mondorescue.sources.list” to “/etc/apt/sources.list” file to install Mondo packages.

On Debian

## On Debian 6 ##

# wget ftp://ftp.mondorescue.org/debian/6/mondorescue.sources.list

# sh -c “cat mondorescue.sources.list >> /etc/apt/sources.list”

# apt-get update

# apt-get install mondo

## On Debian 5 ##

# wget ftp://ftp.mondorescue.org/debian/5/mondorescue.sources.list

# sh -c “cat mondorescue.sources.list >> /etc/apt/sources.list”

# apt-get update

# apt-get install mondo

On Ubuntu/Linux Mint

To install Mondo Rescue in Ubuntu 12.10, 12.04, 11.10, 11.04, 10.10 and 10.04 or Linux Mint 13, open the terminal and add the MondoRescue repository in “/etc/apt/sources.list” file. Run these following commands to install Mondo Resuce packages.

# wget ftp://ftp.mondorescue.org/ubuntu/`lsb_release -r|awk ‘{print $2}’`/mondorescue.sources.list

# sh -c “cat mondorescue.sources.list >> /etc/apt/sources.list”

# apt-get update

# apt-get install mondo

Creating Cloning or Backup ISO Image of System/Server

There are two ways to create a Backup/Clone ISO. Interactive and command line.

Interactive Bacup/Clone ISO Image

After installing Mondo, Run “mondoarchive” command as “root” user. Then follow screenshots that shows how to create an ISO based backup media of your full system.

If you’ve selected default backup path, you will see an ISO image under “/var/cache/mondo/“, that you can burnt into a CD/DVD for later restore.

Command Line Bacup/Clone ISO Image

To create a one line full backup ISO with name “mybackup”v run:

mondoarchive -O -p mybackup -i -d /var/cache/mondo -s 4480m

this will create a file named “mybackup-1.iso” at the path “/var/cache/mondo”

Shedule a daily backup (CRON JOB)

1. Use ‘at’ to run your usual mondoarchive command

# at now + 5 min

# mondoarchive -O -p mybackup -i -d /var/cache/mondo -s 4480m

# -d

2. Grab the script generated by ‘at’ and make a copy of it

grep mondo /var/spool/at/* 
cp /var/spool/at/ /root/mondo-cronscript

3. Edit that script to use ‘’

# vi /root/mondo-cronscript

4. at the end of the script add a new line with the mondoarchive command:

mondoarchive -O -p mybackup -i -d /var/cache/mondo -s 4480m

5. Run that script from your crontab (the egample is a "working" daily task, monday to friday at 00:00)

# crontab -e

0 0 * * 1-5 /root/mondo-cronscript

Restore

To restore burn the ISO to a DVD (or mount it if using virtualization) and start the server. At the prompt write “nuke” and it will restore the whole disk (re-image).

If restoring to different machine/VM it will have different MAC address. It need to change the MAC address of the eth0 interface to the new one in order the interface to be enabled.

MAC address change after restore

ifconfig -a (check the MAC address)

vi /etc/sysconfig/network-scripts/ifcfg-eth0 (edit the MAC address adding the new one)

service network stop

service network start

ifconfig -a (check it eth0 is up)

if not then try “ifup eth0”

Pantelis Apostolidis

www.cloudcorner.gr

The post Linux free Backup and Clone (imaging) Solution appeared first on Apostolidis Cloud Corner.

Some random linux commands

Pantelis Apostolidis — Tue, 23 Sep 2014 10:33:38 +0000

List running processes: ps aux

Enable network interface: ifup eth0 (the first interface, lan, is eth0, and goes on with eth1 etc)

To make the ethernet interface to autostart on boot, in /etc/sysconfig/network-scripts/ifcfg-eth0 make sure that ONBOOT=yes

Mound CD/DVD drive: mount /dev/cdrom /mnt

Edit a file using text editor: vi /path/to/file
Press ESC and then type :w and hit Enter to exit discarding changes
Press ESC and then type q! and hit Enter to exit saving changes

Install a program using yum: yum install httpd (httpd is Apache)

Restart a service: service httpd restart

View the firewall rules: cat /etc/sysconfig/iptables

Add a firewall rule: (this example enables port 80) iptables -I INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT
After the change you need to save and restart the iptables:
service iptables save
service iptables restart

Create a user:
useradd uddika
passwd uddika

Give sudo access:
sudo adduser sudo

static IP: http://www.cyberciti.biz/faq/linux-configure-a-static-ip-address-tutorial/

DNS: http://www.unixmen.com/dns-server-installation-step-by-step-using-centos-6-3/

Connect to mysql: mysql -u root -p

To auto start a new service:

Find out the name of service’s script from /etc/init.d/ directory e.g. mysqld or httpd
Add it to chkconfig
sudo /sbin/chkconfig --add mysqld
Make sure it is in the chkconfig.
sudo /sbin/chkconfig --list mysqld
Set it to autostart
sudo /sbin/chkconfig mysqld on

To stop a service from auto starting on boot

sudo /sbin/chkconfig mysqld off

live log view: tail -f logfile

Samba (windows share): yum install samba3-client

mount.cifs //SERVER_ADDRESS/SHARE_NAME MOUNT_POINT -o user=USERNAME
mount.cifs //192.168.10.118/Downloads /mnt -o user=share,pass=password
umount -l

Pantelis Apostolidis

www.cloudcorner.gr

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