haproxy+pacemaker高可用负载均衡
一、haproxy1.server1
1)安装、配置haproxy
# yum install haproxy -y
# vim /etc/haproxy/haproxy.cfg
#---------------------------------------------------------------------
# Example configuration for a possible web application.See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events.This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 65535
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 8000
stats uri /admin/stats
monitor-uri /monitoruri
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontendmain *:5000
# acl url_static path_beg -i /static /images /javascript /stylesheets
# acl url_static path_end -i .jpg .gif .png .css .js
# use_backend static if url_static
bind 172.25.29.100:80
default_backend static
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend static
balance roundrobin
server static1 172.25.29.2:80 check
server static2 172.25.29.3:80 check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
#backend app
# balance roundrobin
# serverapp1 127.0.0.1:5001 check
# serverapp2 127.0.0.1:5002 check
# serverapp3 127.0.0.1:5003 check
# serverapp4 127.0.0.1:5004 check
# ip addr add 172.25.29.100/24 dev eth0
2)修改limit值
# vim /etc/security/limits.conf
haproxy - nofile 65535
# /etc/init.d/haproxy start
3)测试
在浏览器输入：
http://172.25.29.100 #按F5发现可以负载均衡，所用算法为轮询
http://172.25.29.100/admin/stats #自带健康检查
http://172.25.29.100/monitoruri
2.server4
1)安装haproxy
# yum install haproxy -y
然后server1发送haproxy.cfg至server4
# scp /etc/haproxy/haproxy.cfg 172.25.29.4:/etc/haproxy/haproxy.cfg
添加vip并启动
# ip addr add 172.25.29.100/24 dev eth0
# /etc/init.d/haproxy start
二、pacemaker
1.server1
安装pacemaker、corosync、crmsh
# yum install -y pacemaker corosync
# rpm -ivh crmsh-1.2.6-0.rc2.2.1.x86_64.rpm --nodeps --force
# cp /etc/corosync/corosync.conf.example /etc/corosync/corosync.conf
# vim /etc/corosync/corosync.conf
# Please read the corosync.conf.5 manual page
compatibility: whitetank
totem {
version: 2
secauth: off
threads: 0
interface {
ringnumber: 0
bindnetaddr: 172.25.29.0
mcastaddr: 226.94.1.1
mcastport: 5405
ttl: 1
}
}
logging {
fileline: off
to_stderr: no
to_logfile: yes
to_syslog: yes
logfile: /var/log/cluster/corosync.log
debug: off
timestamp: on
logger_subsys {
subsys: AMF
debug: off
}
}
amf {
mode: disabled
}
service {
ver: 0
name: pacemaker
}
aisexce {
user: root
group: root
}
quorum {
provider: corosync_votequorum
expected_votes: 2
two_node: 1
}
# /etc/init.d/corosync start
2.server4
安装pacemaker、corosync、crmsh
# yum install -y pacemaker corosync
# rpm -ivh crmsh-1.2.6-0.rc2.2.1.x86_64.rpm --nodeps --force
# scp /etc/corosync/authkey /etc/corosync/corosync.conf 172.25.29.4:/etc/corosync/
# /etc/init.d/corosync start
# crm status
Last updated: Tue Apr 16 14:01:12 2018
Last change: Tue Apr 16 14:00:51 2018 via crmd on server1
Stack: classic openais (with plugin)
Current DC: server1 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured
Online: [ server1 server4 ]
# crm status
Last updated: Tue Apr 16 14:01:03 2018
Last change: Tue Apr 16 14:00:51 2018 via crmd on server1
Stack: classic openais (with plugin)
Current DC: server1 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured
Online: [ server1 server4 ]
3.server1
# crm configure property no-quorum-policy="ignore" #只有两个节点所以不竞选
# crm configure property stonith-enabled=false #禁用stonith
# crm configure #添加vip
crm(live)configure# primitive haproxy lsb:haproxy op monitor interval=30s
crm(live)configure# primitive vip ocf:heartbeat:IPaddr params ip=172.25.29.100 nic='eth0' cidr_netmask='24'
crm(live)configure# group web vip haproxy
crm(live)configure# commit
crm(live)configure# Ctrl-C, leaving
# crm configure show
node server1
node server4
primitive haproxy lsb:haproxy \
op monitor interval="30s"
primitive vip ocf:heartbeat:IPaddr \
params ip="172.25.29.100" nic="eth0" cidr_netmask="24"
group web vip haproxy
property $id="cib-bootstrap-options" \
dc-version="1.1.10-14.el6-368c726" \
cluster-infrastructure="classic openais (with plugin)" \
expected-quorum-votes="2" \
no-quorum-policy="ignore" \
stonith-enabled="false"
# crm status
...
Online: [ server1 server4 ]
Resource Group: web
vip (ocf::heartbeat:IPaddr): Started server1
haproxy (lsb:haproxy):Started server1
4.测试
# crm node standby #down掉server1
# crm status
...
Node server1: standby
Online: [ server4 ]
Resource Group: web
vip (ocf::heartbeat:IPaddr): Started server4
haproxy (lsb:haproxy):Started server4
# crm node online#up server1
# crm node standby #down掉server4
# crm status
...
Node server4: standby
Online: [ server1 ]
Resource Group: web
vip (ocf::heartbeat:IPaddr): Started server1
haproxy (lsb:haproxy):Started server1
# crm node standby#两台一起down掉
# crm status
...
Node server1: standby
Node server4: standby
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