有时候公司调度机、数据库这些业务流量都比较大，为了提高网络吞吐量、链路冗余，所以我们都做端口绑定,linux下网卡绑定有多种模式，我这里用的是mode4
交换机上操作：
system-view interface Bridge-Aggregation 100 link-aggregation mode dynamic quit interface GigabitEthernet1/0/28 port link-aggregation group 100 quit interface GigabitEthernet1/0/29 port link-aggregation group 100 quit interface GigabitEthernet1/0/33 port link-aggregation group 100 quit interface GigabitEthernet1/0/30 port link-aggregation group 100 quit
服务器上操作：
1、撰写bond0的配置文件
vi /etc/sysconfig/network-scripts/ifcfg-bond0 DEVICE=bond0 ONBOOT=yes BOOTPROTO=static IPADDR=10.10.0.100 NETMASK=255.255.0.0 USERCTL=no TYPE=Ethernet
2、修改eth0、1、2、3的配置文件
/etc/sysconfig/network-scripts/ifcfg-eth0、1、2、3 DEVICE=eth0（1、2、3对应修改） BOOTPROTO=none ONBOOT=yes USERCTL=no MASTER=bond0 SLAVE=yes
3、编辑模块载入配置文件，开机自动加载bonding模块到内核
vim /etc/modprobe.d/openfwwf.conf ##########新增以下内容########### alias bond0 bonding options bond0 miimon=100 mode=4 alias net-pf-10 off #关闭ipv6支持 #################################
4、重启完全网卡
5、查看交换机绑定状态是否正常（Status都是S就ok了）
<zw_lan_18.F-06>display link-aggregation verbose
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing
Port Status: S -- Selected, U -- Unselected
Flags: A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,
D -- Synchronization, E -- Collecting, F -- Distributing,
G -- Defaulted, H -- Expired
Aggregation Interface: Bridge-Aggregation100
Aggregation Mode: Dynamic
Loadsharing Type: Shar
System ID: 0x8000, c4ca-d9d6-d1f3
Local:
Port Status Priority Oper-Key Flag
--------------------------------------------------------------------------------
GE1/0/28 S 32768 1 {ACDEF}
GE1/0/29 S 32768 1 {ACDEF}
GE1/0/30 S 32768 1 {ACDEF}
GE1/0/33 S 32768 1 {ACDEF}
Remote:
Actor Partner Priority Oper-Key SystemID Flag
--------------------------------------------------------------------------------
GE1/0/28 2 255 17 0xffff, 6cae-8b51-1c7a {ACDEF}
GE1/0/29 4 255 17 0xffff, 6cae-8b51-1c7a {ACDEF}
GE1/0/30 3 255 17 0xffff, 6cae-8b51-1c7a {ACDEF}
GE1/0/33 1 255 17 0xffff, 6cae-8b51-1c7a {ACDEF}做绑定之前首先需要知道服务器的网卡对应接交换机的那个网口，你可以登录到交换机上执行：
terminalmonitor（此功能默认是关闭的），然后在服务器上分别down网口，从交换机上就可以看到是那个端口down了。
http://wgkgood.blog.51cto.com/1192594/1380295
缓存服务器Squid架构配置
随着网站访问人数越来越多，承受的并发和压力也越来越高，这时候我们需要对网站和架构进行优化，今天我们来讨论使用Squid对架构进行优化，缓存网站。
一：安装
安装之前我们需要对系统进行优化，主要优化系统内核相关参数
vi /etc/sysctl.conf #sysctl.conf config 2014-03-26 net.ipv4.ip_forward = 0 net.ipv4.conf.default.rp_filter = 1 net.ipv4.conf.default.accept_source_route = 0 kernel.sysrq = 0 kernel.core_uses_pid = 1 net.ipv4.tcp_syncookies = 1 kernel.msgmnb = 65536 kernel.msgmax = 65536 kernel.shmmax = 68719476736 kernel.shmall = 4294967296 net.ipv4.tcp_max_tw_buckets = 10000 net.ipv4.tcp_sack = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_rmem = 4096 87380 4194304 net.ipv4.tcp_wmem = 4096 16384 4194304 net.core.wmem_default = 8388608 net.core.rmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.core.netdev_max_backlog = 262144 net.core.somaxconn = 262144 net.ipv4.tcp_max_orphans = 3276800 net.ipv4.tcp_max_syn_backlog = 262144 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_synack_retries = 1 net.ipv4.tcp_syn_retries = 1 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_mem = 94500000 915000000 927000000 net.ipv4.tcp_fin_timeout = 1 net.ipv4.tcp_keepalive_time = 15 net.ipv4.ip_local_port_range = 1024 65535
优化Linux文件打开最大数：
vi /etc/security/limits.conf * soft nproc 65535 * hard nproc 65535 * soft nofile 65535 * hard nofile 65535
自动化安装Squid脚本，里面分别配置了两个虚拟主机域名，前端有LVS，LVS均衡后端多组squid集群，根据命中率去调整squid集群的数量，Squid后端均衡Nginx或者Apache。（完整的架构LVS+Keepalived+Squid+Nginx+Resin/Tomcat/PHP+MySQL集群）
扩扑图如下：
#!/bin/sh
#Auto make install squid server
SQUID_CNF=/etc/squid/squid.conf
CACHE_DIR=(
/data/cache1
/data/cache2
)
#Install squid shell
yum install -y squid
#config squid.conf
cat >>$SQUID_CNF <<EOF
#global config squid.conf 2014-03-26
http_port 80 accel vhost vport
cache_peer 192.168.149.128 parent 80 0 originserver name=wugk1
cache_peer 192.168.149.129 parent 80 0 originserver name=wugk2
cache_peer_domain wugk1 www.wugk1.com
cache_peer_domain wugk2 www.wugk2.com
visible_hostname localhost
forwarded_for off
via off
cache_vary on
#acl config
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl SSL_ports port 443
acl Safe_ports port 80 8080 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl all src 0.0.0.0/0
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localnet
http_access allow localhost
http_access allow all
acl PURGE method PURGE
http_access allow PURGE localhost
http_access deny PURGE
#squid config 2014-03-25
cache_dir aufs /data/cache1 10240 16 256
cache_dir aufs /data/cache2 10240 16 256
cache_mem 4000 MB
maximum_object_size 8 MB
maximum_object_size_in_memory 256 KB
hierarchy_stoplist cgi-bin ?
coredump_dir /var/spool/squid
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern \.(jpg|png|gif|mp3|xml|html|htm|css|js) 1440 50% 2880 ignore-reload
refresh_pattern . 0 20% 4320
EOF
#config cache_dir
mkdir -p ${CACHE_DIR[@]} ;chown -R squid:squid ${CACHE_DIR[@]}
#restart squid server
/etc/init.d/squid restart
if
[ "$?" == "0" ];then
echo "The Squid Server Install Successfully !!"
else
echo "The Squid Server Install Failed !!,Please Check Log......"
fi最后测试，前端LVS截图（注LVS此处不配置了）
通过浏览器查看head头，缓存命中情况截图如下：
通过命令
squidclient -p 80 mgr:info |egrep "(Request Hit Ratios|Byte Hit Ratios)"
查看缓存命中率如下：
二、批量清空缓存
使用Shell脚本批量清空squid缓存脚本auto_clean_cache.sh
#!/bin/sh
DIR=/data/cache/
Command=/usr/sbin/squidclient
if
[ "$1" = "" ];then
echo "Usage:{$0 "\$1" ,Example exec $0 forum.php}"
exit
fi
grep -r -a $1 ${DIR} | strings | grep "http:"|grep -v "=" >list.txt
count=`cat list.txt|wc -l`
if
[ "$count" -eq "0" ];then
echo -e "---------------------------------\nThe $1 cache already update,Please exit ......"
exit
fi
while read line
do
$Command -m PURGE -p 80 "$line" >>/dev/null
if [ $? -eq 0 ];then
echo -e "----------------------------------\nThe $line cache update successfully!"
fi
done < list.txt脚本执行：
[root@node2 ~]# sh auto_clean_cache.sh forum.php ---------------------------------- The http://www.wugk2.com/forum.php cache update successfully! [root@node2 ~]#
