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| read https://wiki.libvirt.org/page/VirtualNetworking along with below data | |
| The above deostn't talk about bridged networking. | |
| For bridged networking https://wiki.libvirt.org/page/Networking | |
| [stack@gprfs036 infrared]$ brctl show | |
| bridge name bridge id STP enabled interfaces | |
| data 8000.525400520d57 yes data-nic | |
| vnet0 | |
| vnet3 | |
| vnet6 | |
| external 8000.5254007596f0 yes external-nic | |
| vnet2 | |
| vnet5 | |
| vnet8 | |
| management 8000.52540017a0b2 yes management-nic | |
| vnet1 | |
| vnet4 | |
| vnet7 | |
| virbr0 8000.525400e24bbe yes virbr0-nic | |
| [stack@gprfs036 infrared]$ iptables -t nat -L | grep -i masq | |
| iptables v1.4.21: can't initialize iptables table `nat': Permission denied (you must be root) | |
| Perhaps iptables or your kernel needs to be upgraded. | |
| [stack@gprfs036 infrared]$ sudo iptables -t nat -L | grep -i masq | |
| MASQUERADE tcp -- 172.16.0.0/24 !172.16.0.0/24 masq ports: 1024-65535 | |
| MASQUERADE udp -- 172.16.0.0/24 !172.16.0.0/24 masq ports: 1024-65535 | |
| MASQUERADE all -- 172.16.0.0/24 !172.16.0.0/24 | |
| MASQUERADE tcp -- 10.0.0.0/24 !10.0.0.0/24 masq ports: 1024-65535 | |
| MASQUERADE udp -- 10.0.0.0/24 !10.0.0.0/24 masq ports: 1024-65535 | |
| MASQUERADE all -- 10.0.0.0/24 !10.0.0.0/24 | |
| MASQUERADE tcp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535 | |
| MASQUERADE udp -- 192.168.122.0/24 !192.168.122.0/24 masq ports: 1024-65535 | |
| MASQUERADE all -- 192.168.122.0/24 !192.168.122.0/24 | |
| [stack@gprfs036 infrared]$ ip r | |
| default via 10.16.159.254 dev em1 proto dhcp metric 100 | |
| 10.0.0.0/24 dev external proto kernel scope link src 10.0.0.1 | |
| 10.16.152.0/21 dev em1 proto kernel scope link src 10.16.153.105 metric 100 | |
| 172.16.0.0/24 dev management proto kernel scope link src 172.16.0.1 | |
| 192.168.24.0/24 dev data proto kernel scope link src 192.168.24.254 | |
| 192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 | |
| [stack@gprfs036 infrared]$ ps -aef | grep dnsma | |
| nobody 2976 1 0 Jun03 ? 00:00:06 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper | |
| root 2977 2976 0 Jun03 ? 00:00:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper | |
| nobody 6763 1 0 Jun03 ? 00:00:12 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/external.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper | |
| root 6764 6763 0 Jun03 ? 00:00:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/external.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper | |
| nobody 6947 1 0 Jun03 ? 00:00:08 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/management.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper | |
| root 6950 6947 0 Jun03 ? 00:00:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/management.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper | |
| nobody 7112 1 0 Jun03 ? 00:00:06 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/data.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper | |
| For routed networking | |
| https://jamielinux.com/docs/libvirt-networking-handbook/routed-network.html | |
| gprfc43 | |
| ------- | |
| ip r | |
| 172.15.1.0/24 dev br-management | |
| 172.15.0.0/16 dev p4p1 | |
| ip a | |
| br-management 172.15.1.1/24 | |
| p4p1 172.15.0.1/16 | |
| DHCP for br-management network 172.15.1.2-172.15.1.255 | |
| gprfc44 | |
| ------- | |
| ip r | |
| 172.15.2.0/24 dev br-management | |
| 172.15.0.0/16 dev p4p1 | |
| ip a | |
| br-management 172.15.2.1/24 | |
| p4p1 172.15.0.2/16 | |
| DHCP for br-management network 172.15.2.2-172.15.2.255 | |
| sudo yum install git gcc libffi-devel openssl-devel python-virtualenv libselinux-python tmux qemu-kvm libvirt libvirt-python libguestfs-tools virt-install libguestfs libguestfs-tools-c libguestfs-tools-xfs python-lxml wget libselinux-python expect -y;systemctl enable libvirtd;systemctl start libvirtd | |
| ip a a 172.15.0.2/16 dev p2p1 | |
| cat /tmp/mynetwork1.xml | |
| <network> | |
| <name>mynetwork1</name> | |
| <bridge name="virbr1" /> | |
| <forward mode="route"/> | |
| <ip address="172.15.2.1" netmask="255.255.255.0"> | |
| <dhcp> | |
| <range start="172.15.2.2" end="172.15.2.254"/> | |
| </dhcp> | |
| </ip> | |
| </network> | |
| virsh net-define /tmp/mynetwork1.xml | |
| virsh net-start mynetwork1 | |
| cp /var/lib/libvirt/images/rhel-guest-image-7-6-210-x86-64-qcow2 /var/lib/libvirt/images/test-1-disk1.qcow2 | |
| virt-install --name test-1 --disk path=/var/lib/libvirt/images/test-1-disk1.qcow2,device=disk,bus=virtio,format=qcow2,cache=unsafe --boot hd --network network:mynetwork1 --virt-type kvm --cpu host-passthrough --ram 6144 --vcpus 4 --os-variant rhel7 --import --noautoconsole --autostart --vnc --rng /dev/urandom | |
| virsh set-user-password --domain test-1 --user root --password 100yard- | |
| virsh net-dhcp-leases mynetwork1 | |
| 19 brctl addbr br-virbr19 | |
| 20 ip a | |
| 21 brctl addifbr-virbr19 p2p1 | |
| 22 brctl addif br-virbr19 p2p1 | |
| 31 mkdir -p /var/lib/dnsmasq/bridge1 | |
| 32 touch /var/lib/dnsmasq/bridge1/hostsfile | |
| 33 touch /var/lib/dnsmasq/bridge1/leases | |
| 34 touch /var/lib/dnsmasq/bridge1/dnsmasq.conf | |
| 35 vi /var/lib/dnsmasq/bridge1/dnsmasq.conf | |
| 36 cat /var/lib/dnsmasq/bridge1/hostsfile | |
| 37 ls /var/lib/dnsmasq/bridge1/hostsfile | |
| 38 ip a a 172.15.0.2/16 dev br-virbr19 | |
| 39 libvirtd --help | |
| 40 dnsmasq --conf-file=/var/lib/dnsmasq/bridge1/dnsmasq.conf --pid-file=/var/run/dnsmasq/bridge1.pid | |
| 41 vi /var/lib/dnsmasq/bridge1/dnsmasq.conf | |
| 42 dnsmasq --conf-file=/var/lib/dnsmasq/bridge1/dnsmasq.conf --pid-file=/var/run/dnsmasq/bridge1.pid | |
| 43 vi /var/lib/dnsmasq/bridge1/dnsmasq.conf | |
| 44 dnsmasq --conf-file=/var/lib/dnsmasq/bridge1/dnsmasq.conf --pid-file=/var/run/dnsmasq/bridge1.pid | |
| 45 dnsmasq --conf-file=/var/lib/dnsmasq/bridge1/dnsmasq.conf | |
| 46 ps -aef | grep dnsma | |
| 47 ls /var/lib/libvirt/images/ | |
| 48 virt-install --name test-1 --disk path=/var/lib/libvirt/images/test-1-disk1.qcow2,device=disk,bus=virtio,format=qcow2,cache=unsafe --boot hd --network network:bridge1 --virt-type kvm --cpu host-passthrough --ram 6144 --vcpus 4 --os-variant rhel7 --import --noautoconsole --autostart --vnc --rng /dev/urandom | |
| 49 virsh net-dhcp-leases bridge1 | |
| 50 ls /var/lib/dnsmasq/bridge1/ | |
| 51 cat /var/lib/dnsmasq/bridge1/hostsfile | |
| 52 brctl show | |
| 53 ip a | |
| 54 virsh list | |
| 55 ifconfig | |
| 56 ip l s br-virbr19 up | |
| 57 ip a | |
| 58 virsh destroy test-1 | |
| 59 virsh undefine test-1 | |
| 60 brctl show | |
| 61 virt-install --name test-1 --disk path=/var/lib/libvirt/images/test-1-disk1.qcow2,device=disk,bus=virtio,format=qcow2,cache=unsafe --boot hd --network network:bridge1 --virt-type kvm --cpu host-passthrough --ram 6144 --vcpus 4 --os-variant rhel7 --import --noautoconsole --autostart --vnc --rng /dev/urandom | |
| 62 ls | |
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