Linux学习-LVS持久连接
Posted 丢爸
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LVS持久连接
无论使用什么算法，LVS持久连接都能实现在一段时间内，将来自同一个客户端请求派发至此前选定的RS。
持久连接模板(内存缓冲区)：记录了每一个客户端连接，分配给它的RS的映射关系
ipvsadm -A|E … -p timeout
timeout：持久连接时长，默认300秒，单位：秒
在基于SSL：需要用到持久连接
PPC：将来自于同一个客户端对同一个集群服务的请求，始终定向至此前选定的RS 持久端口连接
PCC：将来自于同一个客户端对所有端口的请求，始终定向至此前选定的RS 持久客户端连接
将所有端口统统定义为集群服务，一律向RS转发
PNMPP：持久防火墙标记连接
#PPC
[root@mail ~]# ipvsadm -E -t 192.168.0.100:80 -s wlc -p 50
[root@mail ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.0.100:80 wlc persistent 50
-> 192.168.0.109:80 Route 1 0 0
-> 192.168.0.110:80 Route 5 0 0
#PCC
[root@mail scripts]# ipvsadm -A -t 192.168.0.100:0 -s rr -p 60
[root@mail scripts]# ipvsadm -a -t 192.168.0.100:0 -r 192.168.0.109 -g
[root@mail scripts]# ipvsadm -a -t 192.168.0.100:0 -r 192.168.0.110 -g
[root@mail scripts]# ipvsadm -L -n -c
IPVS connection entries
pro expire state source virtual destination
TCP 09:13 ESTABLISHED 192.168.0.105:60642 192.168.0.100:80 192.168.0.110:80
TCP 00:12 NONE 192.168.0.105:0 192.168.0.100:80 192.168.0.110:80
#使用SSH连接，也一样连接至RS2
[C:\\~]$ ssh 192.168.0.100
Connecting to 192.168.0.100:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
WARNING! The remote SSH server rejected X11 forwarding request.
Last login: Sun Jul 18 05:28:21 2021 from 192.168.0.105
[root@lotus ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:D3:6A:50
inet addr:192.168.0.110 Bcast:192.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::20c:29ff:fed3:6a50/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:983 errors:0 dropped:0 overruns:0 frame:0
TX packets:528 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:116737 (114.0 KiB) TX bytes:50032 (48.8 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)
lo:0 Link encap:Local Loopback
inet addr:192.168.0.100 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:65536 Metric:1
#PNMPP
[root@mail scripts]# iptables -t mangle -A PREROUTING -d 192.168.0.100 -i eth0 -p tcp --dport 80 -j MARK --set-mark 8
[root@mail scripts]# iptables -t mangle -A PREROUTING -d 192.168.0.100 -i eth0 -p tcp --dport 22 -j MARK --set-mark 8
[root@mail scripts]# ipvsadm -A -f 8 -s rr
[root@mail scripts]# ipvsadm -a -f 8 -r 192.168.0.109 -g -w 2
[root@mail scripts]# ipvsadm -a -f 8 -r 192.168.0.110 -g -w 5
[root@mail scripts]#
[root@mail scripts]#
[root@mail scripts]#
[root@mail scripts]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
FWM 8 rr
-> 192.168.0.109:0 Route 2 0 0
-> 192.168.0.110:0 Route 5 1 0
#通过SSH连接，因使用了rr算法，故两次连接的结果会不同
#----第一次SSH连接
[C:\\~]$ ssh 192.168.0.100
Connecting to 192.168.0.100:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
WARNING! The remote SSH server rejected X11 forwarding request.
Last login: Sun Jul 18 06:16:52 2021 from 192.168.0.105
[root@lotus ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:38:28:64
inet addr:192.168.0.109 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe38:2864/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2294 errors:0 dropped:0 overruns:0 frame:0
TX packets:820 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:213669 (208.6 KiB) TX bytes:81045 (79.1 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)
lo:0 Link encap:Local Loopback
inet addr:192.168.0.100 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:65536 Metric:1
#-------------第2次SSH连接
[C:\\~]$ ssh 192.168.0.100
Connecting to 192.168.0.100:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
WARNING! The remote SSH server rejected X11 forwarding request.
Last login: Sun Jul 18 06:15:59 2021 from 192.168.0.105
[root@lotus ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:D3:6A:50
inet addr:192.168.0.110 Bcast:192.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::20c:29ff:fed3:6a50/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2452 errors:0 dropped:0 overruns:0 frame:0
TX packets:1050 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:253444 (247.5 KiB) TX bytes:98710 (96.3 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)
lo:0 Link encap:Local Loopback
inet addr:192.168.0.100 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:65536 Metric:1
#因telnet-server没有加入到集群中，通过telnet连接，直接连接至director服务器
[C:\\~]$ telnet 192.168.0.100
Connecting to 192.168.0.100:23...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
CentOS release 6.10 (Final)
Kernel 2.6.32-754.el6.x86_64 on an x86_64
mail.tye.com login: hadoop
Password:
[hadoop@mail ~]$ /sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:78:18:40
inet addr:192.168.0.103 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe78:1840/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8789 errors:0 dropped:0 overruns:0 frame:0
TX packets:10521 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:724313 (707.3 KiB) TX bytes:7490643 (7.1 MiB)
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:78:18:40
inet addr:192.168.0.100 Bcast:192.168.0.100 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
#修改持久连接，使用持久连接，同一台客户端访问为连接至同一台服务器
[root@mail scripts]# ipvsadm -E -f 8 -s rr -p 60
[C:\\~]$ ssh 192.168.0.100
Connecting to 192.168.0.100:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
WARNING! The remote SSH server rejected X11 forwarding request.
Last login: Sun Jul 18 06:22:53 2021 from 192.168.0.105
[root@lotus ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:38:28:64
inet addr:192.168.0.109 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe38:2864/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2488 errors:0 dropped:0 overruns:0 frame:0
TX packets:941 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:236073 (230.5 KiB) TX bytes:96401 (94.1 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)
lo:0 Link encap:Local Loopback
inet addr:192.168.0.100 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:65536 Metric:1
[root@lotus ~]# exit
logout
Connection closing...Socket close.
Connection closed by foreign host.
Disconnected from remote host(192.168.0.100:22) at 22:26:26.
Type `help' to learn how to use Xshell prompt.
[C:\\~]$ ssh 192.168.0.100
Connecting to 192.168.0.100:22...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
WARNING! The remote SSH server rejected X11 forwarding request.
Last login: Sun Jul 18 06:26:18 2021 from 192.168.0.105
[root@lotus ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:38:28:64
inet addr:192.168.0.109 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe38:2864/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2544 errors:0 dropped:0 overruns:0 frame:0
TX packets:982 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:242915 (237.2 KiB) TX bytes:103642 (101.2 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)
lo:0 Link encap:Local Loopback
inet addr:192.168.0.100 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:65536 Metric:1
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