当前位置：网站首页>Haproxy high availability solution
Haproxy high availability solution
2022-07-04 13:46:00 【51CTO】
Add --line-numbers Options
Factors that measure load balancer performance
Session rate Conversation rate ： Number of sessions per minute
Session concurrency Number of concurrent sessions ： The longer the server takes to process the session , The more concurrent sessions ;
Date rate Data rate ： With MB/s、Mbps To measure
HaProxy brief introduction
Official website ： https://www.haproxy.org/
HAProxy Is a free load balancing software , Can run on most mainstream Linux On the operating system .
Suitable for heavy load Web Site , These sites usually need session persistence or seven layer proxy .
HAProxy Core functions
- Load balancing ：L4 and L7 Two modes , Support RR/ static state RR/LC/IP Hash/URI Hash/URL_PARAM Hash/HTTP_HEADER Hash And so on
- health examination ： Support TCP and HTTP Two modes of health examination
- Conversation retention ： For application clusters without session sharing , It can be done by Insert Cookie/Rewrite Cookie/Prefix Cookie, And many of the above Hash Method to achieve session retention
- SSL：HAProxy Can be parsed HTTPS agreement , And can decrypt the request as HTTP Back to back end transmission
- HTTP Request rewriting and redirection
- Monitoring and statistics ：HAProxy Provides the basis for Web The statistics page of , Show health status and traffic data . Based on this function , Users can develop monitoring programs to monitor HAProxy The state of
HAProxy Working mode
- http: The client request is deeply analyzed and then sent to the server ;
- tcp：4 Layer scheduling , Do not check the information on the seventh floor ;
- Health： Just a health check （ Not recommended ）;
HAProxy Advantages and disadvantages
advantage
- Support sessio、cookie function ;
- Can pass Url Take a health check ;
- efficiency 、 Load balancing speed is higher than Nginx And below LVS;
- HAProxy Support TCP, It can be done to MySQL Load balancing ;
- Rich scheduling algorithms ;
shortcoming
- Regular expressions are weaker than Nginx;
- Logs depend on Syslogd;
HAProxy install
1） install haproxy
CentOS The system can use yum Install directly
see HAProxy edition
2022 The latest version in is 2.6
2） Modify the configuration file
$
v
i
m
/
e
t
c
/
h
a
p
r
o
x
y
/
h
a
p
r
o
x
y
.
c
f
g
g
l
o
b
a
l
l
o
g
1
2
7
.
0
.
0
.
1
l
o
c
a
l
2
c
h
r
o
o
t
/
v
a
r
/
l
i
b
/
h
a
p
r
o
x
y
p
i
d
f
i
l
e
/
v
a
r
/
r
u
n
/
h
a
p
r
o
x
y
.
p
i
d
#
p
i
d
writing
Pieces of
m
a
x
c
o
n
n
4
0
0
0
#
most
Big
even
Pick up
Count
（
Silent
recognize
4
0
0
0
）
u
s
e
r
h
a
p
r
o
x
y
g
r
o
u
p
h
a
p
r
o
x
y
d
a
e
m
o
n
#
take
Into the
cheng
discharge
Enter into
d
e
a
m
o
n
model
type
shipment
That's ok
;
d
e
f
a
u
l
t
s
m
o
d
e
h
t
t
p
#
work
do
model
type
（
Silent
recognize
h
t
t
p
）
l
o
g
g
l
o
b
a
l
#
Mining
use
whole
game
set
The righteous
Of
Japan
Records
o
p
t
i
o
n
h
t
t
p
l
o
g
#
Japan
Records
class
other
（
h
t
t
p
Japan
Records
grid
type
）
o
p
t
i
o
n
d
o
n
t
l
o
g
n
u
l
l
#
No
remember
record
healthy
kang
check
check
Of
Japan
Records
Letter
Rest
o
p
t
i
o
n
h
t
t
p
-
s
e
r
v
e
r
-
c
l
o
s
e
o
p
t
i
o
n
f
o
r
w
a
r
d
f
o
r
e
x
c
e
p
t
1
2
7
.
0
.
0
.
0
/
8
o
p
t
i
o
n
r
e
d
i
s
p
a
t
c
h
#
S
e
r
v
e
r
i
d
clothing
service
device
hang
fall
after
strong
system
set
towards
To
Its
it
healthy
kang
Of
clothing
service
device
On
r
e
t
r
i
e
s
3
#
even
Pick up
loss
Defeat
To
3
Time
after
Just
ren
service
clothing
service
No
can
use
t
i
m
e
o
u
t
h
t
t
p
-
r
e
q
u
e
s
t
1
0
s
t
i
m
e
o
u
t
q
u
e
u
e
1
m
t
i
m
e
o
u
t
c
o
n
n
e
c
t
1
0
s
t
i
m
e
o
u
t
c
l
i
e
n
t
1
m
#
customer
Household
End
even
Pick up
super
when
f
r
o
n
t
e
n
d
m
a
i
n
*:
5
0
0
0
#
prison
listen
Of
End
mouth
d
e
f
a
u
l
t
_
b
a
c
k
e
n
d
a
p
p
#
take
please
seek
turn
Hair
To
name
by
“
a
p
p
”
Of
after
End
clothing
service
b
a
c
k
e
n
d
s
t
a
t
i
c
#
set
The righteous
after
End
clothing
service
b
a
l
a
n
c
e
r
o
u
n
d
r
o
b
i
n
s
e
r
v
e
r
s
t
a
t
i
c
1
2
7
.
0
.
0
.
1:
4
3
3
1
c
h
e
c
k
b
a
c
k
e
n
d
a
p
p
b
a
l
a
n
c
e
r
o
u
n
d
r
o
b
i
n
s
e
r
v
e
r
a
p
p
1
1
2
7
.
0
.
0
.
1:
5
0
0
1
c
h
e
c
k
l
i
s
t
e
n
s
t
a
t
u
s
b
i
n
d
*:
1
0
2
5
0
#
set
The righteous
prison
control
page
Noodles
- 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.
{ The configuration file consists of }
global: Global configuration block , Configuration parameters take effect globally ;
default: Set the default parameters for other parts that follow , The default parameters can be reset by subsequent parts （ That is, the subsequent configuration shall prevail ）;
frontend： Define front-end Services ;
backend： Define back end services
3） Service start stop
$
s
y
s
t
e
m
c
t
l
e
n
a
b
l
e
-
-
n
o
w
h
a
p
r
o
x
y
.
s
e
r
v
i
c
e
#
Qi
dynamic
h
a
p
r
o
x
y
and
set up
Set up
by
open
machine
since
Qi
$
s
y
s
t
e
m
c
t
l
s
t
a
t
u
s
h
a
p
r
o
x
y
.
s
e
r
v
i
c
e
#
check
see
clothing
service
shape
state
$
s
y
s
t
e
m
c
t
l
s
t
o
p
h
a
p
r
o
x
y
.
s
e
r
v
i
c
e
#
stop
stop
h
a
p
r
o
x
y
.
s
e
r
v
i
c
e
- 1.
- 2.
- 3.
monitor HAProxy state
see HAProxy Service port , Then through the host IP: The port is accessed in the browser HAProxy Monitoring page of .
$ ss -ntulp | grep haproxy
remarks
- Queue Information about queue data （ The current number of queues , Maximum , Queue limit number ）;
- Session rate Session rate per second （ Current value , Maximum , Limited quantity ）;
- Sessions There will always be a lot of talk （ Current value , Maximum , Total amount ,Lbtot: total number of times a server was selected Total time taken to select a server ）;
- Bytes（ Inbound 、 Outbound flow ）;
- Denied（ Refuse request 、 Reject response ）;
- Errors（ Wrong request 、 Wrong connection 、 Wrong response ）;
- Warnings（ Try warning again retry、 Reconnect the redispatches）;
- Server( state 、 The last time to check （ How long ago was the last inspection performed ）、 The weight 、 Number of backup servers 、down Number of servers 、down Machine time ).
边栏推荐
- 模块化笔记软件综合评测：Craft、Notion、FlowUs
- 实战：fabric 用户证书吊销操作流程
- 提高MySQL深分页查询效率的三种方案
- Node の MongoDB 安装
- Rsyslog configuration and use tutorial
- Interviewer: what is the difference between redis expiration deletion strategy and memory obsolescence strategy?
- 8 expansion sub packages! Recbole launches 2.0!
- Rsyslog配置及使用教程
- 7 月数据库排行榜：MongoDB 和 Oracle 分数下降最多
- "Pre training weekly" issue 52: shielding visual pre training and goal-oriented dialogue
猜你喜欢
随机推荐
[AI system frontier dynamics, issue 40] Hinton: my deep learning career and research mind method; Google refutes rumors and gives up tensorflow; The apotheosis framework is officially open source
Database lock table? Don't panic, this article teaches you how to solve it
XML入门一
The only core indicator of high-quality software architecture
8 expansion sub packages! Recbole launches 2.0!
C＃/VB. Net to add text / image watermarks to PDF documents
"Pre training weekly" issue 52: shielding visual pre training and goal-oriented dialogue
Xilinx/system-controller-c/boardui/ unable to connect to the development board, the solution of jamming after arbitrary operation
比量子化学方法快六个数量级，一种基于绝热状态的绝热人工神经网络方法，可加速对偶氮苯衍生物及此类分子的模拟
2022KDD预讲 | 11位一作学者带你提前解锁优秀论文
高效！用虚拟用户搭建FTP工作环境
Is the outdoor LED screen waterproof?
CTF competition problem solution STM32 reverse introduction
Meituan Ali's Application Practice on multimodal recall
"Tips" to slim down Seurat objects
A data person understands and deepens the domain model
爬虫练习题（一）
Alibaba cloud award winning experience: build a highly available system with polardb-x
Reptile exercises (I)
MySQL three-level distribution agent relationship storage