[转载]LVS+Keepalived之三大模式
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 | LVS + Keepalived之三大模式 ====================================================================================== NAT模式: ====================================================================================== 一、仅lvs服务器端安装 yum install ipvsadm openssl-devel popt popt-devel libnl-devel cd /opt/src/ tar xzvf keepalived-1.2.7. tar .gz cd keepalived-1.2.7 . /configure make && make install cp /usr/local/etc/rc .d /init .d /keepalived /etc/rc .d /init .d/ cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ mkdir /etc/keepalived cp /usr/local/etc/keepalived/keepalived .conf /etc/keepalived/ cp /usr/local/sbin/keepalived /usr/sbin/ 修改 /etc/keepalived/keepalived .conf文件 [root@WEB ~] # cat /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { 123@123.com } notification_email_from 123@123.com smtp_server mail.123.com smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 52 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 88.88.88.88 } } vrrp_instance LAN_GATEWAY { state MASTER interface eth1 virtual_router_id 52 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.1.88 } } virtual_server 88.88.88.88 80 { delay_loop 6 lb_algo lc #lb_kind DR #lb_kind TUN lb_kind NAT persistence_timeout 60 protocol TCP real_server 192.168.1.18 80 { weight 3 TCP_CHECK { connect_timeout 30 nb_get_retry 3 delay_before_retry 2 connect_port 80 } } real_server 192.168.1.68 80 { weight 3 TCP_CHECK { connect_timeout 30 nb_get_retry 3 delay_before_retry 2 connect_port 80 } } } [root@WEB ~] # [root@WEB ~] # service ipvsadm start [root@WEB ~] # service keepalived start 注意: echo "1" > /proc/sys/net/ipv4/ip_forward 二、实际服务器端的操作 将网关设置为lanvip的地址192.168.1.88 三、lvs查看 ipvsadm - ln ipvsadm -lnc ipvsadm -l -n --stats 调度算法:rr|wrr|lc|wlc|lblc|lblcr|dh|sh| sed |nq ====================================================================================== TUN模式: ====================================================================================== 一、仅lvs服务器端安装 yum install ipvsadm openssl-devel popt popt-devel libnl-devel cd /opt/src/ tar xzvf keepalived-1.2.7. tar .gz cd keepalived-1.2.7 . /configure make && make install cp /usr/local/etc/rc .d /init .d /keepalived /etc/rc .d /init .d/ cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ mkdir /etc/keepalived cp /usr/local/etc/keepalived/keepalived .conf /etc/keepalived/ cp /usr/local/sbin/keepalived /usr/sbin/ 修改 /etc/keepalived/keepalived .conf文件 [root@WEB ~] # cat /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { 123@123.com } notification_email_from 123@123.com smtp_server mail.123.com smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 52 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.1.88 } } virtual_server 192.168.1.88 80 { delay_loop 6 lb_algo lc lb_kind TUN persistence_timeout 60 protocol TCP real_server 192.168.2.18 80 { weight 3 TCP_CHECK { connect_timeout 30 nb_get_retry 3 delay_before_retry 2 connect_port 80 } } real_server 192.168.3.68 80 { weight 3 TCP_CHECK { connect_timeout 30 nb_get_retry 3 delay_before_retry 2 connect_port 80 } } } [root@WEB ~] # [root@WEB ~] # service ipvsadm start [root@WEB ~] # service keepalived start 注意: 打开转发或关闭,dr /tun 模式无影响 echo "1" > /proc/sys/net/ipv4/ip_forward 二、实际服务器端的操作 [root@] # cat /usr/local/vip_tun.sh #!/bin/bash #srcipt to start LVS TUN realserver VIP=192.168.1.88 case "$1" in start) #start LVS-TUN real server on this machine echo 1 > /proc/sys/net/ipv4/conf/tunl0/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/tunl0/arp_announce echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce echo 0 > /proc/sys/net/ipv4/conf/tunl0/rp_filter echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter sysctl -p > /dev/null 2>&1 /sbin/modprobe ipip /sbin/ifconfig tunl0 $VIP broadcast $VIP netmask 255.255.255.255 up /sbin/route add -host $VIP dev tunl0 /sbin/ifconfig eth0 mtu 1440 ;; stop) #stop lvs-TUN real server loopback device echo 0 > /proc/sys/net/ipv4/conf/tunl0/arp_ignore echo 0 > /proc/sys/net/ipv4/conf/tunl0/arp_announce echo 1 > /proc/sys/net/ipv4/conf/tunl0/rp_filter echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter /sbin/ifconfig tunl0 down /sbin/modprobe -r ipip /sbin/ifconfig eth0 mtu 1500 ;; status) islothere= '/sbin/ifconfig tunl0 |grep $VIP' isrothere= 'netstat -rn |grep "tunl0"|grep $VIP' if [ ! "$islothere" -o ! "$isrothere" ]; then echo "LVS-TUN real server stopped" else echo "LVS-TUN Running" fi ;; *) echo "$0: Usage: $0 {start|stop|status}" exit 1 ;; esac [root@localhost ~] # /usr/local/vip.sh start|stop|status 三、lvs查看 ipvsadm - ln ipvsadm -lnc ipvsadm -l -n --stats 调度算法:rr|wrr|lc|wlc|lblc|lblcr|dh|sh| sed |nq ====================================================================================== DR模式: ====================================================================================== 一、仅lvs服务器端安装 yum install ipvsadm openssl-devel popt popt-devel libnl-devel cd /opt/src/ tar xzvf keepalived-1.2.7. tar .gz cd keepalived-1.2.7 . /configure make && make install cp /usr/local/etc/rc .d /init .d /keepalived /etc/rc .d /init .d/ cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/ mkdir /etc/keepalived cp /usr/local/etc/keepalived/keepalived .conf /etc/keepalived/ cp /usr/local/sbin/keepalived /usr/sbin/ 修改 /etc/keepalived/keepalived .conf文件 [root@WEB ~] # cat /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { 123@123.com } notification_email_from 123@123.com smtp_server mail.123.com smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 52 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.1.88 } } virtual_server 192.168.1.88 80 { delay_loop 6 lb_algo lc lb_kind DR persistence_timeout 60 protocol TCP real_server 192.168.1.18 80 { weight 3 TCP_CHECK { connect_timeout 30 nb_get_retry 3 delay_before_retry 2 connect_port 80 } } real_server 192.168.1.68 80 { weight 3 TCP_CHECK { connect_timeout 30 nb_get_retry 3 delay_before_retry 2 connect_port 80 } } } [root@WEB ~] # [root@WEB ~] # service ipvsadm start [root@WEB ~] # service keepalived start 注意: 打开转发或关闭,dr /tun 模式无影响 echo "1" > /proc/sys/net/ipv4/ip_forward 二、实际服务器端的操作 [root@localhost ~] # cat /usr/local/vip.sh #!/bin/bash # Script to start LVS DR real server. # description: LVS DR real server . /etc/rc .d /init .d /functions VIP=192.168.1.88 #host=`/bin/hostname` case "$1" in start) # Start LVS-DR real server on this machine. /sbin/ifconfig lo down /sbin/ifconfig lo up echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up /sbin/route add $VIP dev lo:0 ;; stop) # Stop LVS-DR real server loopback device(s). /sbin/ifconfig lo:0 down echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce ;; status) # Status of LVS-DR real server. islothere=` /sbin/ifconfig lo:0 | grep $VIP` isrothere=` netstat -rn | grep "lo:0" | grep $VIP` if [ ! "$islothere" -o ! "isrothere" ]; then # Either the route or the lo:0 device # not found. echo "LVS-DR real server Stopped." else echo "LVS-DR real server Running." fi ;; *) # Invalid entry. echo "$0: Usage: $0 {start|status|stop}" exit 1 ;; esac [root@localhost ~] # /usr/local/vip.sh start|stop|status 三、lvs查看 ipvsadm - ln ipvsadm -lnc ipvsadm -l -n --stats 调度算法:rr|wrr|lc|wlc|lblc|lblcr|dh|sh| sed |nq 注意: 1.TUN模式使用的IP都要是公网IP. 2.VIP的port要和后端realserver的port保持一致,但是不会影响VIP本机的port被其他服务使用. 转载自:http: //www .gaizaoren.com /archives/998 |
附加:
LVS可以使用iptables同时做多个服务的负载均衡并实现持久化连接,使用iptables对包打上标签之后再进行匹配处理。配置如下:
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