linux 下负载均衡工具lvs
linux 下负载均衡工具lvs
检查内核是否支持lvs的ipvs模块
[root@com1 ~]# modprobe -l|grep ipvs
kernel/net/netfilter/ipvs/ip_vs.ko
kernel/net/netfilter/ipvs/ip_vs_rr.ko
kernel/net/netfilter/ipvs/ip_vs_wrr.ko
kernel/net/netfilter/ipvs/ip_vs_lc.ko
kernel/net/netfilter/ipvs/ip_vs_wlc.ko
kernel/net/netfilter/ipvs/ip_vs_lblc.ko
kernel/net/netfilter/ipvs/ip_vs_lblcr.ko
kernel/net/netfilter/ipvs/ip_vs_dh.ko
kernel/net/netfilter/ipvs/ip_vs_sh.ko
kernel/net/netfilter/ipvs/ip_vs_sed.ko
kernel/net/netfilter/ipvs/ip_vs_nq.ko
kernel/net/netfilter/ipvs/ip_vs_ftp.ko
可以看到内核默认支持ipvs模块，下来安装ipvs管理软件
[root@com1 ~]# yum install ipvsadm
The command has two basic formats for execution:
ipvsadm command [protocol] service-address [scheduling-method] [persistence options]
ipvsadm command [protocol] service-address server-address [packet-forwarding-method] [weight options]
The first format manipulates a virtual service and the algorithm for assigning service requests to real servers. Optionally, a persistent timeout and network mask for the granularity of a persistent service may be specified. The second format manipulates a real server that is associated with an exist-ing virtual service. When specifying a real server, the packet-forwarding method and the weight of the real server, relative to other real servers for the virtual service, may be specified, otherwise defaults will be used.
three packet-forwarding methods (NAT, tunneling, and direct routing), and eight load balancing algorithms (round robin, weighted round robin, least-connection, weighted least-connection, locality-based least-con-nection, locality-based least-connection with replication, destination-hashing, and source-hashing).
--gatewaying -g gatewaying (direct routing) (default)
--ipip -i ipip encapsulation (tunneling)
--masquerading -m masquerading (NAT)
--scheduler -s scheduler one of rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq,the default scheduler is wlc.
--list -L|-l list the table
--connection -c output of current IPVS connections
--numeric -n numeric output of addresses and ports
[root@com1 ~]# ipvsadm -l
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.2.215:ndmp rr
-> com1:ndmp Local 1 1455 1
-> com2:ndmp Route 1 1605 0
[root@com1 ~]# ipvsadm -l --rate
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port CPS InPPS OutPPS InBPS OutBPS
-> RemoteAddress:Port
TCP 192.168.2.215:ndmp 0 490 0 41618 0
-> com1:ndmp 0 245 0 20970 0
-> com2:ndmp 0 246 0 20648 0
[root@com1 ~]# ipvsadm -l --stats
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Conns InPkts OutPkts InBytes OutBytes
-> RemoteAddress:Port
TCP 192.168.2.215:ndmp 28421 1971291 0 142348K 0
-> com1:ndmp 14210 1044997 0 77354965 0
-> com2:ndmp 14211 926294 0 64993846 0
[root@com1 ~]# ipvsadm -l -c -n
IPVS connection entries
pro expire state source virtual destination
TCP 14:12 ESTABLISHED 117.35.159.6:13589 192.168.2.215:ndmp com2:ndmp
TCP 02:52 ESTABLISHED 117.35.159.6:9407 192.168.2.215:ndmp com1:ndmp
TCP 14:12 ESTABLISHED 117.35.159.6:13684 192.168.2.215:ndmp com1:ndmp
TCP 03:14 ESTABLISHED 117.35.159.6:7976 192.168.2.215:ndmp com1:ndmp
TCP 09:26 ESTABLISHED 117.35.159.6:23373 192.168.2.215:ndmp com2:ndmp
TCP 01:15 ESTABLISHED 117.35.159.6:7415 192.168.2.215:10000 192.168.2.101:10000
TCP 07:02 ESTABLISHED 117.35.159.6:23713 192.168.2.215:10000 192.168.2.100:10000
TCP 11:59 ESTABLISHED 117.35.159.6:16217 192.168.2.215:10000 192.168.2.101:10000
TCP 11:56 ESTABLISHED 117.35.159.6:16490 192.168.2.215:10000 192.168.2.100:10000
TCP 07:04 ESTABLISHED 117.35.159.6:2617 192.168.2.215:10000 192.168.2.100:10000
TCP 11:55 ESTABLISHED 117.35.159.6:14924 192.168.2.215:10000 192.168.2.100:10000
TCP 07:01 ESTABLISHED 117.35.159.6:25286 192.168.2.215:10000 192.168.2.101:10000
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