[Oracle RAC 12.1 Installation on Oracle Linux 6.7 (ISCSI + ASM)]: Virtualbox machine configs for DNS server

# su - vmadm

$ vm=vm_oel_dns

Create directories for the virtual machine and for snapshots

$ mkdir -p ${VM_HOME}/${vm}/snapshots

Creating and registering the virtual machine:

$ VBoxManage createvm \
--name ${vm} \
--ostype RedHat_64 \
--basefolder ${VM_HOME}/${vm} \
--register

Setting the RAM limit:

$ VBoxManage modifyvm ${vm} --memory 512

Connect video card with 32 MB:

$ VBoxManage modifyvm ${vm} --vram 32

Remove sound card, remove floppy drive:

$ VBoxManage modifyvm ${vm} --floppy disabled --audio none

Connect hard disk controller (SAS):

$ VBoxManage storagectl ${vm} \
--add sas \
--name "SAS Controller"

Creating and connecting hard disks:

Create virtual hard disks. The size is recommended to be set according to available resources. Otherwise, problems and virtual machine crashes may occur):

$ cd ${VM_HOME}/${vm}/${vm}

$ VBoxManage createhd \
--filename ${vm}_dsk1.vdi \
--size 40960 \
--format VDI \
--variant Standard

Connect disks to the SAS controller:

$ VBoxManage storageattach ${vm} \
--storagectl "SAS Controller" \
--port 0 \
--type hdd \
--medium ${vm}_dsk1.vdi

Connect the IDE controller to which the DVD-ROM will later be connected:

$ VBoxManage storagectl ${vm} \
--add ide \
--name "IDE Controller"

Connect the DVD image of the operating system being installed to the IDE controller:

$ VBoxManage storageattach ${vm} \
--storagectl "IDE Controller" \
--port 0 \
--device 0 \
--type dvddrive \
--medium  /home/marley/Downloads/OracleLinux6U7/x64/OracleLinux-R6-U7-Server-x86_64-dvd.iso

Connecting network interfaces:

$ VBoxManage modifyvm ${vm} \
--nictype1 82540EM \
--nic1 bridged \
--bridgeadapter1 eth0

Determine the boot device order:

$ VBoxManage modifyvm ${vm} \
--boot1 disk \
--boot2 dvd

Determine the snapshot directory:

$ VBoxManage modifyvm ${vm} \
--snapshotfolder ${VM_HOME}/${vm}/snapshots

Allow RDP connection to the machine:

$ VBoxManage modifyvm ${vm} \
--vrde on \
--vrdemulticon on \
--vrdeauthtype null \
--vrdeaddress 192.168.1.5 \
--vrdeport 3389

Show the created virtual machine result:

$ VBoxManage showvminfo ${vm}

VIRTUAL MACHINE IS READY FOR OPERATING SYSTEM INSTALLATION

Start the virtual machine with RDP connection capability:

$ VBoxHeadless --startvm ${vm}

Install the operating system on 1 disk.