用uml实现OpenVZ vps的拥堵控制算法bbr

OpenVZ Server

Install Ubuntu-14.04-x86_64 Trusty:

apt-get update
apt-get install tmux build-essential libncurses5-dev libvdeplug-dev libpcap-dev debootstrap -y

Download the lastest linux kernel for compiling the User Mode Linux(www.kernel.org)

wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.10.tar.xz
tar xvf linux-4.9.10.tar.xz
cd linux-4.9.10
make defconfig ARCH=um

Edit the .config file and insert the options for the configuration file.

CONFIG_BINFMT_ELF=y
CONFIG_HOSTFS=y
CONFIG_LBD=y
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_STDERR_CONSOLE=y
CONFIG_UNIX98_PTYS=y
CONFIG_EXT2_FS=y

Use menuconfig select for the TCP congestion control "BBR" and network device.

make menuconfig ARCH=um or make ARCH=um nconfig

Networking support  --->  Networking options  --->  TCP: advanced congestion control  --->

<*>BBR TCP (NEW)
<*> Default TCP congestion control (BBR) 

<*> UML Network Devices

Compile the vmlinux file with 4 Thread.

make ARCH=um vmlinux -j4

Use debootstrap for building the ubuntu14.04 container and install the package.

debootstrap --arch amd64 trusty ./ubuntu1404 http://ftp.ubuntu.com/ubuntu/
chroot ubuntu1404 /bin/bash
apt-get update
apt-get install git -y

Assign the ip address for the container eth0.

vi /etc/network/interfaces
auto eth0
iface eth0 inet static
address 10.0.0.2
netmask 255.255.255.0
gateway 10.0.0.1

For login the container to change the tty0 and securetty config.

#create the tty0 config and change the config.
cp /etc/init/tty1.conf /etc/init/tty0.conf
vi /etc/init/tty0.conf
exec /sbin/getty -8 38400 tty0

#insert the tty0 enable root login
vi /etc/securetty
tty0

#change passwd for root
passwd root

#if you need the openssh-server, it need to permit root login.
apt-get install openssh-server
vi /etc/ssh/sshd_config
PermitRootLogin yes

Install the shadowsocksr to the container and add the user.

cd /usr/local && git clone https://github.com/shadowsocksr/shadowsocksr.git
cd shadowsocksr && bash initcfg.sh
vi userapiconfig.py
API_INTERFACE = 'mudbjson'
python mujson_mgr.py -a -u ssr443 -p 443 -m aes-128-cfb -k ssr-passwd -O auth_aes128_sha1 -o tls1.2_ticket_auth

vi /etc/rc.local
/usr/local/shadowsocksr/run.sh

exit

Set up the Host SSH tcp port 22 for bypass and NAT traffic for container.

iptables -t nat -A PREROUTING -p tcp -m tcp --dport 22 -j RETURN
iptables -t nat -A PREROUTING -d $(hostname -i)/32 -j DNAT --to-destination 10.0.0.2
iptables -t nat -A POSTROUTING -d 10.0.0.2/32 -j SNAT --to-source 10.0.0.1
iptables -t nat -A POSTROUTING -s 10.0.0.0/24 ! -d 10.0.0.0/24 -j MASQUERADE

Set up the TAP for Host and Run the vmlinux

ip tuntap add tap0 mode tap
ip addr add 10.0.0.1/24 dev tap0
ip link set tap0 up  
mount -o remount,size=256m /dev/shm
dd if=/dev/zero of=rootfs.img bs=1MB count=1000
/root/vmlinux root=/dev/ubda rootfstype=hostfs hostfs=/root/ubuntu1404 ubd0=/root/rootfs.img eth0=tuntap,tap0 mem=256m rw