Nginx Load Balancer-memcached Cache service

Lab Environment:

NGINX CentOS 7.2x86_64 ip:172.16.253.94 192.168.1.10

RealServer1 CentOS 6.7x86_64 ip:192.168.1.20

RealServer2 CentOS 7.2x86_64 ip:192.168.1.30

Client RHEL5.5 ip:172.16.251.75

RealServer1:

[Email protected] ~]# iptables-f
[Email protected] ~]# Setenforce 0
[[email protected] ~]# yum-y install httpd php php-mysql mysql-server

[Email protected] ~]# service httpd restart

[[Email protected] ~]# service httpd MySQL

[Email protected] ~]# echo "RealServer1" >>/var/www/html/index.html

RealServer2:

[Email protected] ~]# iptables-f
[Email protected] ~]# Setenforce 0
[[email protected] ~]# yum-y install httpd php php-mysql mariadb-server

[Email protected] ~]# systemctl start Httpd.service mariadb.service

[Email protected] ~]# echo "RealServer2" >>/var/www/html/index.html

Load Balancer httpd:

1. Install Nginx:

[Email protected] ~]# iptables-f
[Email protected] ~]# Setenforce 0

[Email protected] ~]# yum-y install nginx-1.10.1-1.el7.ngx.x86_64.rpm

[Email protected] ~]# RPM-QL Nginx

2. Start the service:

[Email protected] ~]# nginx-t
Nginx:the configuration file/etc/nginx/nginx.conf syntax is OK
Nginx:configuration file/etc/nginx/nginx.conf Test is successful
[Email protected] ~]# Nginx

[Email protected] ~]# SS-TNL
State recv-q send-q Local address:port Peer address:port
LISTEN 0 *:80 *:*

3. Define Upstream Load Balancing:

[[Email protected]]# vim/etc/nginx/nginx.conf

HTTP {

Omit part ...

Upstream websrvs{

Server 192.168.1.20;

Server 192.168.1.30;

}

Omit part ...

}

4. Call the Upstream module:

[[Email protected]]# vim/etc/nginx/conf.d/default.conf

server {

Omit part ...

Location/{

root/usr/share/nginx/html;

Index index.html index.htm;

Proxy_pass Http://websrvs;

}

Omit part ...

}

5. Client Test: (Default polling algorithm)

[[Email protected]~]# for i in {1..10}; Do Curl http://172.16.253.94; Done

Realserver 1

Realserver 2

Realserver 1

Realserver 2

Realserver 1

Realserver 2

Realserver 1

Realserver 2

Realserver 1

Realserver 2

6. Configure the Scheduler algorithm:

[[Email protected]]# vim/etc/nginx/nginx.conf

HTTP {

Omit part ...

Upstream websrvs{

Server 192.168.1.20;

Server 192.168.1.30;

Hash $request _uri consistent; Consistent hash algorithm: Send the same URL request to the same realserver

}

Omit part ...

}

7. Test the consistency hash algorithm:

[[Email protected]~]# for i in {1..10}; Do Curl http://172.16.253.94/; Done

Realserver 1

Realserver 1

Realserver 1

Realserver 1

Realserver 1

Realserver 1

Realserver 1

Realserver 1

Realserver 1

Realserver 1

Load Balancer SSH Service:

[[Email protected]]# vim/etc/nginx/nginx.conf

stream{
Upstream sshsrvs{
Server 192.168.1.20:22;
Server 192.168.1.30:22;
}

server {
Listen 172.16.253.94:22202;
Proxy_pass Sshsrvs;
}
}

[[email protected]] #nginx-S stop

[[email protected]] #nginx

Client Remote login:

Ssh-p 22202 [email protected]

Memcached Cache Service:

[[Email protected] ~] #yum-y install memcached

[[Email protected] ~] #rpm-ql memcache

[[Email protected] ~] #cat/etc/sysconfig/memcached

Port= "11211"

User= "Memcached"

maxconn= "1024"

Cachesize= "64"

Options= ""

[[Email protected] ~] #ss-TNL

State recv-q send-q Local address:port Peer address:port

LISTEN 0 *:11211 *:*

memcahed Simple configuration:

[[Email protected]~]# telnet 172.16.253.94 11211

Trying172.16.253.94 ...

Connected topxe94.magelinux.com (172.16.253.94).

Escape characteris ' ^] '.

Command:
Statistics classes: stats, stats items, stats slabs, stats sizes
Storage classes: Set, add, replace, append, prepend
Get data classes: Get, delete, INCR/DECR
Empty: Flush_all

Common options:
-M<NUM>: Cache space size in MB, default 64
-c<num>: Concurrent connection, default is 1024
-U USERNAME: Program runner
-P Port: Listening TCP port
-U port: Listening UDP port
-l <IP_ADDR>: IP address of the listener
-M: An error message is returned to the request store cache entry when the cache is exhausted
-f<factor>:chunk size growth factor
-t<num>: Number of threads, default = 4

Nginx Load Balancer-memcached Cache service