拆出基础包

utils/bbr.sh

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+#!/bin/bash
+
+# Install script for BBR base on CentOS 7 by xiaosong
+CentOS_Version=`cat /etc/redhat-release | grep -oE '[0-9]+\.[0-9]+' | cut -d'.' -f1`
+KVersion=4.12.9-1
+
+if [ -z ${CentOS_Version} ]
+then
+	CentOS_Version=0
+fi
+
+if [ ${CentOS_Version} -lt 6 ]
+then
+	echo "Sorry, I can only support CentOS 6/7 yet."
+	exit
+fi
+
+if [[ `getconf WORD_BIT` = '32' && `getconf LONG_BIT` = '64' ]] ; then
+	BIT_VER=x64
+else
+	BIT_VER=x86
+fi
+
+if [ ${BIT_VER} != 'x64' ]
+then
+	echo "Sorry, I can only support x64 yet."
+	exit
+fi
+
+function modifySysctl() {
+	if [ ! `cat /etc/sysctl.conf | grep -i -E "net.core.default_qdisc = fq"` ]; then
+		echo "net.core.default_qdisc = fq" >> /etc/sysctl.conf
+	fi
+	if [ ! `cat /etc/sysctl.conf | grep -i -E "net.ipv4.tcp_congestion_control = bbr"` ]; then
+		echo "net.ipv4.tcp_congestion_control = bbr" >> /etc/sysctl.conf
+	fi
+}
+
+echo "Now I will replace the system kernel to ${KVersion}..."
+echo "Start installing"
+rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
+if [ ${CentOS_Version} -eq 7 ]
+then
+	rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
+else
+	rpm -Uvh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm
+fi
+yum --enablerepo=elrepo-kernel install -y kernel-ml
+echo "Checking if the installtion is ok"
+KGRUB2=`ls /etc/grub2.cfg|wc -l`
+if [ ${KGRUB2} -eq 1 ]
+then
+	INS_OK=`awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg | grep ${KVersion} | grep -i -v debug | grep -i -v rescue | cut -d' ' -f1`
+	if [ -z ${INS_OK} ]
+	then
+		echo "Sorry, install failed, please contact the author"
+		exit
+	fi
+	yum install -y grub2-tools
+	grub2-set-default ${INS_OK}
+	modifySysctl
+else
+	KGRUB=`ls /boot/grub/grub.conf|wc -l`
+	if [ ${KGRUB} -eq 1 ]
+	then
+		INS_OK=`grep '^title ' /boot/grub/grub.conf | awk -F'title ' '{print i++ " : " $2}' | grep ${KVersion} | grep -i -v debug | grep -i -v rescue | cut -d' ' -f1`
+		if [ -z ${INS_OK} ]
+		then
+			echo "Sorry, install failed, please contact the author"
+			exit
+		fi
+		sed -i "s/^default.*/default=${INS_OK}/" /boot/grub/grub.conf
+		modifySysctl
+	fi
+fi
+
+echo " "
+echo "Installation is completed, now you can reboot the system. "
+echo "You should check BBR after the rebooting using command: "
+echo " "
+echo "     sysctl -a|grep congestion_control"
+
+