How to install KVM on Oracle Linux 9

 in This Tutorial you will Learn " How to install KVM on Oracle Linux 9 "
Kernel-based Virtual Machine (KVM) is an open source virtualization technology built into Linux®. Specifically, KVM lets you turn Linux into a hypervisor that allows a host machine to run multiple, isolated virtual environments called guests or virtual machines (VMs).
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Server - Os:  Oracle Linux Server 9   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
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cat /etc/system-release ; dnf groupinstall "Development Tools" -y

lscpu | grep Virtualization
sudo dnf update ; sudo dnf install qemu-kvm qemu-img libvirt virt-manager virt-install virt-viewer libvirt-client
sudo systemctl start libvirtd ; sudo systemctl enable libvirtd ; sudo systemctl status libvirtd
sudo virt-manager
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How To Install Docker on Oracle Linux Server 9

 
Docker is a container engine that uses the Linux Kernel to create the containers on top of an operating system. Which is used to create, deploy and run the applications.
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Server - Os:  Oracle Linux Server 9.0   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
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cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
sudo dnf update
sudo dnf install -y docker-ce docker-ce-cli containerd.io
docker --version
sudo systemctl enable docker ; sudo systemctl start docker ; sudo systemctl status docker
sudo usermod -aG docker yourname
id testbox
docker run hello-world
docker pull ubuntu
docker images
docker run -it ubuntu
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Configure Storage Server with iSCSI.

 in This Tutorial you will Learn " How To Configure Storage Server with iSCSI On Oracle Linux 9
Configure Storage Server with iSCSI.
Storage server with iSCSI on network is called iSCSI Target, Client Host that connects to iSCSI Target is called iSCSI Initiator.
+----------------------+          |          +----------------------+
| [   iSCSI Target   ] |192.168.1.50 | 192.168.1.40| [ iSCSI Initiator  ] |
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Server - Os:  Oracle Linux Server 9.0   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
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Configure iSCSI Target (Targetcli) -  

cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf -y install targetcli
mkdir /var/lib/iscsi_disks
targetcli
cd backstores/fileio
create disk01 /var/lib/iscsi_disks/disk01.img 10G
cd /iscsi
create iqn.2023-03.server.testbox:dlp.target01
cd iqn.2023-03.server.testbox:dlp.target01/tpg1/luns
create /backstores/fileio/disk01
cd ../acls
create iqn.2023-03.server.testbox:node01.initiator01
cd iqn.2023-03.server.testbox:node01.initiator01
set auth userid=username
set auth password=password
exit
ss -napt | grep 3260
systemctl enable target
firewall-cmd --add-service=iscsi-target ; firewall-cmd --runtime-to-permanent
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Configure iSCSI Initiator  -
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cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf -y install iscsi-initiator-utils
nano /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2023-03.server.testbox:node01.initiator01

nano /etc/iscsi/iscsid.conf
node.session.auth.authmethod = CHAP
node.session.auth.username = username
node.session.auth.password = password

iscsiadm -m discovery -t sendtargets -p 192.168.1.50                   
iscsiadm -m node -o show
systemctl restart iscsid
iscsiadm -m node --login
iscsiadm -m session -o show
cat /proc/partitions

parted --script /dev/sdc "mklabel gpt"
parted --script /dev/sdc "mkpart primary 0% 100%"
mkfs.xfs -i size=1024 -s size=4096 /dev/sdc1
mount /dev/sdc1 /mnt
df -hT
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Configure NTP Server in Oracle Linux 9

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NTP stands for Network Time Protocol.
It is used to synchronize the time on your Linux system with a centralized NTP server.
A local NTP server on the network can be synchronized with an external timing source to keep all the servers in your organization in-sync with an accurate time.
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chronyc sources

dnf -y install chrony
nano  /etc/chrony.conf
change servers to synchronize (replace to your own timezone NTP server)
# need NTP server itself to sync time with other NTP server
#pool 2.centos.pool.ntp.org iburst
pool ntp.nict.jp iburst


# add network range to allow to receive time synchronization requests from NTP Clients
# specify your local network and so on
# if not specified, only localhost is allowed
allow 192.168.1.50/24

systemctl enable --now chronyd ; systemctl restart chronyd ; systemctl status chronyd
firewall-cmd --add-service=ntp ; firewall-cmd --runtime-to-permanent
chronyc sources

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