diff options
Diffstat (limited to 'tools/qemu.html')
| -rw-r--r-- | tools/qemu.html | 127 |
1 files changed, 86 insertions, 41 deletions
diff --git a/tools/qemu.html b/tools/qemu.html index 0079dfc..86fb7aa 100644 --- a/tools/qemu.html +++ b/tools/qemu.html @@ -12,7 +12,9 @@ <h2 id="kern">1. Host System</h2> - <p>Load modules, in this case kvm of intel cpu;</p> + <p>Prepare host system for virtual machines, this includes create new user, + loading necessary modules and configure network. Load kvm module, in this example + intel module is loaded but depends on host cpu;</p> <pre> # modprobe -a kvm-intel tun virtio @@ -27,6 +29,7 @@ <h2 id="disk">2. Disk images</h2> + <p>Qemu supports multiple disk images types.</p> <dl> <dt>img</dt> <dd>Raw disk image, allows dd to a physical device.</dd> @@ -115,67 +118,109 @@ KERNEL=="tun", GROUP="kvm", MODE="0660", OPTIONS+="static_node=net/tun" </pre> + <h3>2.1. Routing</h3> - <h3>2.1. Public Bridge</h3> - - <p>Create <a href="network.html#bridge">bridge</a>, create new - tap and add it to bridge;</p> - - <pre> - # DEV="br0" - # TAP="tap1" - </pre> - - <pre> - # ip tuntap add ${TAP} mode tap group kvm - # ip link set ${TAP} up - </pre> + <p>Create interface with correct permissions set for kvm group.</p> <pre> - # ip link set ${TAP} master ${DEV} + # sysctl -w net.ipv4.ip_forward=1 + # iptables -A INPUT -i br0 -j ACCEPT + # iptables -A FORWARD -i br0 -j ACCEPT + # iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -d 10.0.0.0/24 -j ACCEPT + # iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -j MASQUERADE </pre> - <h3>2.2. Routing</h3> + <h3>2.2. Public Bridge</h3> - <p>Create interface with correct permissions set for kvm group.</p> + <p>Create <a href="network.html#bridge">bridge</a>, create new + tap and add it to bridge;</p> <pre> - # sysctl -w net.ipv4.ip_forward=1 - # iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -o eth0 -j MASQUERADE + DEV="br0" + + ADDR=10.0.0.254 + NET=10.0.0.0 + GW=192.168.1.254 + MASK=24 + + # one tap for each cpu core + NTAPS=$((`/usr/bin/nproc`)) + + case $1 in + start) + /sbin/ip link add name ${DEV} type bridge + /sbin/ip addr add ${ADDR}/${MASK} dev ${DEV} broadcast + + /sbin/ip link set dev ${DEV} up + /bin/sleep 0.2s + + for i in `/usr/bin/seq $NTAPS` + do + TAP="tap$i" + echo "Setting up ${TAP} tap interface." + /sbin/ip tuntap add ${TAP} mode tap group kvm + /sbin/ip link set ${TAP} up + /bin/sleep 0.2s + /sbin/ip link set ${TAP} master ${DEV} + done + + exit 0 + ;; + stop) + + for i in `/usr/bin/seq $NTAPS` + do + TAP="tap$i" + echo "Deleting ${TAP} tap interface." + /sbin/ip link del ${TAP} + done + + /sbin/ip link set dev ${DEV} down + /sbin/ip route flush dev ${DEV} + /sbin/ip link del ${DEV} + exit 0 + ;; + restart) + $0 stop + $0 start + ;; + *) + echo "Usage: $0 [start|stop|restart]" + ;; + esac + + # End of file </pre> <h2 id="guest">Guest System</h2> - <p>Start qemu with 512 of ram, mydisk.img as disk and boot from iso</p> - <p>See <a href="scripts/system-qemu.sh">scripts/system-qemu.sh</a>, as template. Run virtual machine that uses above tap device;</p> <pre> - $ ISO=~/crux-3.2.iso - $ IMG=~/crux-img.qcow2 - $ TAP="tap1" + #!/bin/bash - $ qemu-system-x86_64 \ - -enable-kvm \ - -m 1024 \ - -boot d \ - -cdrom ${ISO} \ - -hda ${IMG} \ - -net nic,model=virtio -net tap,ifname=${TAP},script=no,downscript=no - </pre> + function rmac_addr (){ + printf '54:60:BE:EF:%02X:%02X\n' $((RANDOM%256)) $((RANDOM%256)) + } - <pre> - $ ISO=~/crux-3.2.iso - $ IMG=~/crux-img.qcow2 + #boot=d + boot=$1 + #iso=crux-3.2.iso + iso=$2 + #image=crux-img.qcow2 + image=$3 + #tap="tap1" + tap=$4 + mac=$(rmac_addr) - $ qemu-system-x86_64 \ + qemu-system-x86_64 \ -enable-kvm \ -m 1024 \ - -boot d \ - -cdrom ${ISO} \ - -hda ${IMG} \ - -net nic,model=virtio -net tap,ifname=${TAP},script=no,downscript=no + -boot ${boot} \ + -cdrom ${iso} \ + -hda ${image} \ + -device e1000,netdev=t0,mac=${mac} \ + -netdev tap,id=t0,ifname=${tap},script=no,downscript=no </pre> <a href="index.html">Tools Index</a> |