First, we can edit the conf file for the various env variables.
Images
Next, we need to build the root fs:
$ ./scripts/mkroot.sh
After that, we install kubeadm:
$ ./scripts/mkkubeadm.sh
Next, build the images for the two vms:
./scripts/mkkvm.sh 0
./scripts/mkkvm.sh 1
Networking
(Proper scripts to be added)
There are multiple ways to setup networking. I opted for using a bridge device, and attach a NIC for all VMs there. (to be automated)
# sudo ip link add kvm-br type bridge
# sudo ip addr add 10.33.33.100/24 dev kvm-br
And then, masquarade traffic from the VMs to the outside world
# sudo sh -c 'echo 0 > /proc/sys/net/bridge/bridge-nf-call-iptables'
# sudo modprobe br_netfilter
# sudo sysctl -w net.ipv4.ip_forward=1
# sudo iptables -t nat -A POSTROUTING -o enxa0cec8e6e64c -j MASQUERADE
# sudo iptables -A FORWARD -i enxa0cec8e6e64c -o kvm-br -m state --state RELATED,ESTABLISHED -j ACCEPT
# sudo iptables -A FORWARD -i kvm-br -o enxa0cec8e6e64c -j ACCEPT
I use a simple dnsmasq.conf:
interface=kvm-br
port=0 # no dns
dhcp-option=option:router,10.33.33.100
dhcp-option=option:dns-server,8.8.8.8
dhcp-range=10.33.33.0,static
dhcp-host=52:54:00:12:34:01,kvm1,10.33.33.1
dhcp-host=52:54:00:12:34:02,kvm2,10.33.33.2
That I run in debug mode:
sudo dnsmasq --conf-file=dnsmasq.conf -d
Kernel image
The kernel image is expected to be in KERNEL_SOURCE in conf. Run
./scripts/installmods.sh to install modules.
start vms
./scripts/runkvm 0
./scripts/runkvm 1
Notes
0 and 1 in runkvm and mkkvm scripts are used as indices to respective
bash arrays.