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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| # Default cOS OEM configuration file | ||
| # | ||
| # This file is part of cOS and will get reset during upgrades. | ||
| # | ||
| # Before you change this file manually, | ||
| # consider copying this file to /usr/local/cloud-config or | ||
| # copy the file with a prefix starting by 90, e.g. /oem/91_custom.yaml | ||
| name: "Default network configuration" | ||
| stages: | ||
| initramfs: | ||
| - name: "Setup network" | ||
| files: | ||
| - path: /etc/sysconfig/network/ifcfg-eth0 | ||
| content: | | ||
| BOOTPROTO='dhcp' | ||
| STARTMODE='onboot' | ||
| permissions: 0600 | ||
| owner: 0 | ||
| group: 0 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| #!/bin/bash | ||
|
|
||
| set -x -e | ||
|
|
||
| atoi() | ||
| { | ||
| #Returns the integer representation of an IP arg, passed in ascii dotted-decimal notation (x.x.x.x) | ||
| IP=$1; IPNUM=0 | ||
| for (( i=0 ; i<4 ; ++i )); do | ||
| ((IPNUM+=${IP%%.*}*$((256**$((3-${i})))))) | ||
| IP=${IP#*.} | ||
| done | ||
| echo $IPNUM | ||
| } | ||
|
|
||
| itoa() | ||
| { | ||
| #returns the dotted-decimal ascii form of an IP arg passed in integer format | ||
| echo -n $(($(($(($((${1}/256))/256))/256))%256)). | ||
| echo -n $(($(($((${1}/256))/256))%256)). | ||
| echo -n $(($((${1}/256))%256)). | ||
| echo $((${1}%256)) | ||
| } | ||
|
|
||
| gen_mac() { | ||
| local end | ||
| local hexchars | ||
| hexchars="0123456789ABCDEF" | ||
| end=$( for i in {1..8} ; do echo -n ${hexchars:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' ) | ||
| echo 06:FE$end | ||
| } | ||
|
|
||
| # These variables can be overwritten | ||
| : ${IFACE:="eth0"} | ||
| : ${BRIDGE_IFACE:="br0"} | ||
| : ${MEMORY_MB:="4096"} | ||
| : ${CPUS:="2"} | ||
| : ${MAC:=`gen_mac`} | ||
| : ${MIGRATE:=false} | ||
| : ${MIGRATE_PORT:=4444} | ||
|
|
||
| : ${KVM_BLK_OPTS:="-drive file=\$KVM_IMAGE,if=none,id=drive-disk0,format=qcow2 \ | ||
| -device virtio-blk-pci,scsi=off,drive=drive-disk0,id=virtio-disk0,bootindex=1"} | ||
| : ${KVM_RAW_BLK_OPTS:="-drive file=\$KVM_IMAGE,if=none,id=drive-disk0,format=raw \ | ||
| -device virtio-blk-pci,scsi=off,drive=drive-disk0,id=virtio-disk0,bootindex=1"} | ||
| : ${KVM_NET_OPTS:="-netdev bridge,br=\$BRIDGE_IFACE,id=net0 \ | ||
| -device virtio-net-pci,netdev=net0,mac=\$MAC"} | ||
|
|
||
| # For debugging | ||
| if [ "$1" = "bash" ]; then | ||
| exec bash | ||
| fi | ||
|
|
||
| # Pass Docker command args to kvm | ||
| KVM_ARGS=$@ | ||
|
|
||
| # Create the qcow disk image on the Docker volume named /image, using | ||
| # the compressed qcow image that came with Docker image as the base. | ||
| # Docker volumes typically perform better than the file system for | ||
| # Docker images (no need for overlay fs etc.) | ||
|
|
||
|
|
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| if [ ! -d "/image" ]; then | ||
| echo "/image directory does not exist, failed to mount volume /image?" | ||
| exit 2 | ||
| fi | ||
|
|
||
| KVM_IMAGE=/image/sda.qcow2 | ||
| if [ -e /root.qcow2 ]; then | ||
| if [ ! -e $KVM_IMAGE ]; then | ||
| qemu-img create -f qcow2 -b /root.qcow2 $KVM_IMAGE | ||
| if [[ $? -ne 0 ]]; then | ||
| echo "Failed to create qcow2 image" | ||
| exit 3 | ||
| fi | ||
| fi | ||
| elif [ ! -e $KVM_IMAGE ]; then | ||
| qemu-img create -f qcow2 $KVM_IMAGE 40g | ||
| fi | ||
|
|
||
| # Network setup: | ||
| # | ||
| # 1. Create a bridge named br0 | ||
| # 2. Remove IP from eth0, save eth0 MAC, give eth0 a random MAC | ||
|
|
||
| cidr2mask() { | ||
| local i mask="" | ||
| local full_octets=$(($1/8)) | ||
| local partial_octet=$(($1%8)) | ||
|
|
||
| for ((i=0;i<4;i+=1)); do | ||
| if [ $i -lt $full_octets ]; then | ||
| mask+=255 | ||
| elif [ $i -eq $full_octets ]; then | ||
| mask+=$((256 - 2**(8-$partial_octet))) | ||
| else | ||
| mask+=0 | ||
| fi | ||
| test $i -lt 3 && mask+=. | ||
| done | ||
|
|
||
| echo $mask | ||
| } | ||
|
|
||
| setup_bridge_networking() { | ||
| TFTP_SERVER=$(dig tftp-server +short) | ||
| while [ -z "$TFTP_SERVER" ]; do | ||
| TFTP_SERVER=$(dig tftp-server +short) | ||
| sleep 1 | ||
| done | ||
|
|
||
| MAC=`ip addr show $IFACE | grep ether | sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*\$//g' | cut -f2 -d ' '` | ||
| IP=`ip addr show dev $IFACE | grep "inet $IP" | awk '{print $2}' | cut -f1 -d/` | ||
| CIDR=`ip addr show dev $IFACE | grep "inet $IP" | awk '{print $2}' | cut -f2 -d/` | ||
| NETMASK=`cidr2mask $CIDR` | ||
| GATEWAY=`ip route get 8.8.8.8 | grep via | cut -f3 -d ' '` | ||
|
|
||
| cat > /etc/dnsmasq.conf << EOF | ||
| user=root | ||
| dhcp-range=$IP,$IP | ||
| dhcp-host=$MAC,$HOSTNAME,$IP,infinite | ||
| dhcp-option=option:router,$GATEWAY | ||
| dhcp-option=option:netmask,$NETMASK | ||
| dhcp-option=option:dns-server,$TFTP_SERVER | ||
| dhcp-boot=$PXE,,$TFTP_SERVER | ||
| EOF | ||
|
|
||
| if [ -z $NO_DHCP ]; then | ||
| dnsmasq | ||
| fi | ||
|
|
||
| # Generate random new MAC address | ||
| hexchars="0123456789ABCDEF" | ||
| end=$( for i in {1..8} ; do echo -n ${hexchars:$(( $RANDOM % 16 )):1} ; done | sed -e 's/\(..\)/:\1/g' ) | ||
| NEWMAC=`echo 06:FE$end` | ||
|
|
||
| let "NEWCIDR=$CIDR-1" | ||
| #NEWNETMASK=`cidr2mask $NEWCIDR` | ||
|
|
||
| i=`atoi $IP` | ||
| let "i=$i^(1<<$CIDR)" | ||
| NEWIP=`itoa i` | ||
|
|
||
| ip link set dev $IFACE down | ||
| ip link set $IFACE address $NEWMAC | ||
| ip addr del $IP/$CIDR dev $IFACE | ||
|
|
||
| brctl addbr $BRIDGE_IFACE | ||
| brctl addif $BRIDGE_IFACE $IFACE | ||
| ip link set dev $IFACE up | ||
| ip link set dev $BRIDGE_IFACE up | ||
| if [ -z $NO_DHCP ]; then | ||
| ip addr add $NEWIP/$NEWCIDR dev $BRIDGE_IFACE | ||
| fi | ||
|
|
||
| if [[ $? -ne 0 ]]; then | ||
| echo "Failed to bring up network bridge" | ||
| exit 4 | ||
| fi | ||
|
|
||
| echo allow $BRIDGE_IFACE > /etc/qemu/bridge.conf | ||
| } | ||
|
|
||
| setup_bridge_networking | ||
|
|
||
| # Allow qemu to use the bridge | ||
| mkdir -p /etc/qemu | ||
| echo allow $BRIDGE_IFACE > /etc/qemu/bridge.conf | ||
|
|
||
| # Configure cloud-init | ||
| USER_DATA=/user-data | ||
| META_DATA=meta-data | ||
| CI_ISO=cidata.iso | ||
| echo "instance-id: $HOSTNAME; local-hostname: $HOSTNAME" > $META_DATA | ||
|
|
||
| if [ ! -e $USER_DATA ]; then | ||
| touch $USER_DATA | ||
| fi | ||
|
|
||
| # Create CD-ROM ISO with cloud-init config | ||
| echo "$(date -R) Generating ISO for cloud-init..." | ||
| mkisofs -output $CI_ISO -volid cidata -joliet -r $USER_DATA $META_DATA | ||
|
|
||
| # Run as PID 1 | ||
| exec qemu-in-container qemu-system-x86_64 \ | ||
| -nographic \ | ||
| -serial mon:stdio \ | ||
| -rtc base=utc,clock=rt \ | ||
| -chardev socket,path=qga.sock,server,nowait,id=qga0 \ | ||
| -device virtio-serial \ | ||
| -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0 \ | ||
| -enable-kvm \ | ||
| -m size=$MEMORY_MB \ | ||
| -smp cpus=$CPUS \ | ||
| -drive if=ide,media=cdrom,file=/usr/share/ipxe/ipxe.iso \ | ||
| -drive if=ide,media=cdrom,file=$CI_ISO \ | ||
| `eval echo $KVM_BLK_OPTS` \ | ||
| `eval echo $KVM_NET_OPTS` $KVM_ARGS $KVM_EXTRA_ARGS |