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集群服务的RS管理

日期:2019-05-17编辑作者:韦德国际bv1946计算机

ipvsadm

ipvsadm命令是lvs集群在应用层的管理工具,我们可以通过此ipvsadm来管理lvs的配置,其实现了集群服务管理:增、删、改,集群服务的RS管理:增、删、改以及查看集群状态。

管理集群服务:增、改、删;

增(A)、改(E):
    ipvsadm -A|E -t|u|f service-address [-s scheduler] [-p [timeout]]
删:
    ipvsadm -D -t|u|f service-address
-t|u|f service-address:
    -t: TCP协议的端口,VIP:TCP_PORT,如 -t 172.16.10.6:80
    -u: UDP协议的端口,VIP:UDP_PORT
    -f:firewall MARK,是一个数字,通过iptables可以定义firewall MARK
[-s scheduler]:指定集群的调度算法,默认为wlc

管理集群上的RS:增、改、删;

增(a)、改(e):
    ipvsadm -a|e -t|u|f service-address -r server-address [-g|i|m] [-w weight]
删:
    ipvsadm -d -t|u|f service-address -r server-address
-r server-address:rip[:port],指明RS的IP地址
lvs类型:
    -g: gateway, dr类型
    -i: ipip, tun类型
    -m: masquerade, nat类型
-w weight:权重

查看集群的状态信息:

    ipvsadm -L|l [options]
options:
    -c, --connection:显示当前的LVS连接
    --timeout:列出超时
    --daemon:
    --stats:状态信息
    --rate:传输速率
    --persistent-conn:坚持连接
    --sor:把列表排序。
    --nosort:不排序
    -n, --numeric:输出IP地址和端口的数字形式

规则的保存和重载:

保存和重载:
    ipvsadm -S = ipvsadm-save
    ipvsadm -R = ipvsadm-restore
清空定义的所有内容:
    ipvsadm -C
将所有数据相关的计数器清零:
    ipvsadm -Z [-t|u|f service-address]

lvs-nat集群的实现

 简易流程图:

图片 1

配置RS1:

[root@RS1 ~]# yum -y install httpd  #安装Apache
[root@RS1 ~]# systemctl stop firewalld.service  #关闭防火墙
[root@RS1 ~]# ifconfig eno16777736 172.16.0.10/24 up  #配置网卡
[root@RS1 ~]# route add default gw 172.16.0.254  #配置路由
[root@RS1 ~]# vim /etc/httpd/conf/httpd.conf  #设置httpd
    Listen 8080
    ServerName localhost
[root@RS1 ~]# vim /var/www/html/index.html
    <h1> RS1 172.16.0.10 <h1>
[root@RS1 ~]# systemctl start httpd  #启用httpd
[root@RS1 ~]# ss -tan
    LISTEN      0      128              :::8080                         :::*  

RS2的配置参考RS1。

配置DR:

[root@DR ~]# yum -y install ipvsadm  #安装ipvsadm工具
[root@DR ~]# ifconfig eno16777736 10.0.0.1/24 up  #配置vip
[root@DR ~]# ifconfig eno16777736:0 172.16.0.254/24 up  #配置dip
[root@DR ~]# sysctl -a | grep ip_forward  #确保核心转发功能已开启
    net.ipv4.ip_forward = 1
[root@DR ~]# ipvsadm -A -t 10.0.0.1:80 -s rr  #配置lvs集群规则
[root@DR ~]# ipvsadm -a -t 10.0.0.1:80 -r 172.16.0.10:8080 -m
[root@DR ~]# ipvsadm -a -t 10.0.0.1:80 -r 172.16.0.11:8080 -m
[root@DR ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.0.0.1:80 rr
  -> 172.16.0.10:8080             Masq    1      0          0         
  -> 172.16.0.11:8080             Masq    1      0          0

客户端测试:

# 调度算法使用rr,轮询方式,故调用RS时 比例为1:1
[root@client ~]# for i in {1..20}; do curl http://10.0.0.1; done
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>
<h1> RS1 172.16.0.10 </h1>
<h1> RS2 172.16.0.11 </h1>

 lvs-dr集群的实现

简易流程图:

      图片 2

配置RS1:

[root@RS1 ~]# ifconfig eno16777736 10.0.0.11/24 up  #配置网卡
[root@RS1 ~]# ifconfig lo:0 10.0.0.1 netmask 255.255.255.255 broadcast 10.0.0.1 up
[root@RS1 ~]# route add -host 10.0.0.1 dev lo:0  #配置路由
[root@RS1 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore  #设置arp响应
[root@RS1 ~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@RS1 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
[root@RS1 ~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@RS1 ~]# vim /etc/httpd/conf/httpd.conf  #设置httpd
    Listen 80
[root@RS1 ~]# vim /var/www/html/index.html
    <h1> RS1 10.0.0.11<h1>
[root@RS1 ~]# systemctl start httpd  #启用httpd
[root@RS1 ~]# ss -tan
    LISTEN      0      128              :::8080                         :::*

RS2的配置参考RS1。

配置DR:

[root@DR ~]# ifconfig eno16777736 10.0.0.2/24 up  #配置dip
[root@DR ~]# ifconfig eno16777736:0 10.0.0.1 netmask 255.255.255.255 broadcast 10.0.0.1 up  #配置vip
[root@DR ~]# ipvsadm -A -t 10.0.0.1:80 -s wrr  #配置lvs集群规则
[root@DR ~]# ipvsadm -a -t 10.0.0.1:80 -r 10.0.0.11 -g -w 1
[root@DR ~]# ipvsadm -a -t 10.0.0.1:80 -r 10.0.0.12 -g -w 2
[root@DR ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.0.0.1:80 wrr
  -> 10.0.0.11:80                 Route   1      0          0         
  -> 10.0.0.12:80                 Route   2      0          0  

客户端测试:

# 调度算法使用wrr,比重为1:2
[root@client ~]# for i in {1..20}; do curl http://10.0.0.1; done
<h1> RS1 10.0.0.11 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS1 10.0.0.11 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.11 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS1 10.0.0.11 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.11 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS1 10.0.0.11 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.11 </h1>
<h1> RS2 10.0.0.12 </h1>
<h1> RS2 10.0.0.12 </h1>

RS1的配置脚本参考:

#!/bin/bash
#
vip=10.0.0.1
rip=10.0.0.11
mask1=255.255.255.255
mask2=255.255.255.0
case $1 in
start)
    echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
    echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
    echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
    ifconfig eno16777736 $rip netmask $mask2 up
    ifconfig lo:0 $vip netmask $mask1 broadcast $vip up
    route add -host $vip dev lo:0
    ;;
stop)
    ifconfig lo:0 down
    echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
    echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
    echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
    echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
    ;;
*) 
    echo "Usage $(basename $0) start|stop"
    exit 1
    ;;
esac

DR的配置脚本参考:

#!/bin/bash
#
vip=10.0.0.1
mask1=255.255.255.255
dip=10.0.0.2
mask2=255.255.255.0
port=80
rs1=10.0.0.11
rs2=10.0.0.12
scheduler='wrr'
type='-g'
case $1 in
start)
    ifconfig eno16777736 $dip netmask $mask2 up
    ifconfig eno16777736:0 $vip netmask $mask1 broadcast $vip up

    ipvsadm -A -t ${vip}:${port} -s $scheduler
    ipvsadm -a -t ${vip}:${port} -r ${rs1} $type -w 1
    ipvsadm -a -t ${vip}:${port} -r ${rs2} $type -w 2
    ;;
stop)
    ipvsadm -C
    ifconfig eno16777736:0 down
    ;;
*)
    echo "Usage $(basename $0) start|stop"
    exit 1
    ;;
esac

 附:使用 ldirectord 实现对各RS的健康状态做检查,失败时禁用,成功时启用。

DR上安装 ldirectord:

[root@DR ~]# lsb_release -r  #centos版本
Release:    7.2.1511
[root@DR ~]# yum localinstall ldirectord-3.9.6-0rc1.1.1.x86_64.rpm  #ldirectord版本
[root@DR ~]# cp /usr/share/doc/ldirectord-3.9.6/ldirectord.cf /etc/ha.d/ldirectord.cf  #ldirectord默认没有配置文件,直接复制一份
[root@DR ~]# vim /etc/ha.d/ldirectord
  checktimeout=3
  checkinterval=1
  fallback=127.0.0.1:80
  autoreload=yes
  quiescent=no

  virtual=10.0.0.1:80
        real=10.0.0.11:80 gate 1
        real=10.0.0.12:80 gate 2
        fallback=127.0.0.1:80 gate
        service=http  #指定服务
        request="index.html"  #指定健康监测的文件
        #receive="Test"  #指定健康监测响应的内容
        scheduler=wrr
        checktype=negotiate
        checkport=80
[root@DR ~]# ipvsadm -C  #清除自己设定的集群
[root@DR ~]# ldirectord start
[root@DR ~]# ipvsadm -ln  #启用ldirectord会自行设定集群
  IP Virtual Server version 1.2.1 (size=4096)
  Prot LocalAddress:Port Scheduler Flags
    -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
  TCP  10.0.0.1:80 wrr
    -> 10.0.0.11:80                 Route   1      0          0         
    -> 10.0.0.12:80                 Route   2      0          0

客户端测试:

#客户端测试
[root@client ~]# for i in {1..20}; do curl http://10.0.0.1; done
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS1 10.0.0.11 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS1 10.0.0.11 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS1 10.0.0.11 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS1 10.0.0.11 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS1 10.0.0.11 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS1 10.0.0.11 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS1 10.0.0.11 </h1> 
#停止RS1的httpd服务
[root@RS1 ~]# systemctl stop httpd.service
#DR的状态
[root@DR ~]# ipvsadm -ln
  IP Virtual Server version 1.2.1 (size=4096)
  Prot LocalAddress:Port Scheduler Flags
    -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
  TCP  10.0.0.1:80 wrr
    -> 10.0.0.12:80                 Route   2      0          0
#客户端测试
[root@client ~]# for i in {1..20}; do curl http://10.0.0.1; done
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 
  <h1> RS2 10.0.0.12 </h1> 

 

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