Nginx + Keepalived + Tomcat + Memcached achieve double VIP load balancing and session remains Session
IP List:
Name IP software
--------------------------- ----------------------
VIPl 192.168.200.254
VIP2 192.168.200.253
Nginx Nginx 192.168.200.101. 1-keepalived
Nginx Nginx keepalived 192.168.200.102 2-
Tomcat-192.168. 1 Tomcat the memcached .200.103
Tomcat-2 192.168.200.104 Tomcat the memcached
all machines and turn off the firewall Selinux:
[the root @ localhost ~] # iptables STOP-Service
[the root @ localhost ~] # 0 the setenforce
installation configuration Tomcat server and JDK:
===== ================================================== ================================================== ========
Installation Configuration JDK:
Extract the-7u65-Linux-JDK x64.tar.gz
[the root-Tomcat @ ~. 1] # RM -rf / usr / bin / Java
[the root-Tomcat @ ~. 1] # 7u65- the tar-XF JDK linux-x64.tar.gz
after extracting generates jdk1.7.0_65 folder, the folder to both the / usr / local named Java
[the root-Tomcat @ ~. 1] # Music Videos jdk1.7.0_65 / / usr / local / java
build script at java.sh /etc/profile.d/
[the root-Tomcat @ ~. 1] # Vim / etc / Profile # end of an additional
export JAVA_HOME = / usr / local / java # set java root
export PATH = $ PATH: $ JAVA_HOME / bin # add the bin subdirectory with java directory in the PATH environment variable in
the script to import java.sh environment variable to take effect
[root @ tomcat-1 ~] # source / etc / profile
run java -version java or javac -version command to view the version
[root @ Tomcat-1 ~] # java -version
java version "1.7.0_65"
the OpenJDK Runtime Environment (x86_64 RHEL-2.5.1.2.el6_5-U65-B17)
The VM 64-Bit Server the OpenJDK (24.65 Build-B04, Mixed MODE)
[the root-Tomcat @ ~. 1] # the javac -version
the javac 1.7.0_65
installation configuration Tomcat:
extract the package
[root @ tomcat-1 ~] # tar xf apache -tomcat-7.0.54.tar.gz
after decompression generating apache-tomcat-7.0.54 folder, the folder to the / usr / local, and renamed tomcat7
[the root-Tomcat @ ~. 1] # Music Videos Apache -tomcat-7.0.54 / usr / local / tomcat7
start the Tomcat
[the root-Tomcat @ ~. 1] # /usr/local/tomcat7/bin/startup.sh
the Using CATALINA_BASE: / usr / local / tomcat7
the Using CATALINA_HOME: / usr / local / tomcat7
the Using CATALINA_TMPDIR: / usr / local / tomcat7 / TEMP
the Using the JRE_HOME: / usr / local / Java
the Using the CLASSPATH: /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat- juli.jar
Tomcat Started.
Run Tomcat default port 8080
[the root-Tomcat @ ~. 1] # -anpt the netstat | grep: 8080
TCP 0 0 ::: ::: * LISTE 8080
N 55 349 / Java
off Tomcat
[the root-Tomcat @ ~. 1] # / usr / local / tomcat7 / bin / shutdown.sh
browser to access the test http://192.168.200.103:8080
establishment of java web site:
first create a webapp directory with the directory for storing website files
[root @ tomcat- 1 ~] # mkdir / webapp
built on a test page index.jsp webapp1 directory of
[root @ Tomcat-1 ~] # vim /webapp/index.jsp
Server Info:
SessionID: <% = session.getId ()%>
<br>
SessionIP: <% = to request.getServerName ()%>
<br>
SessionPort: <% = to request.getServerPort ()%>
<br>
<%
Out.println ( "Server One");
%>
Tomcat server.xml file to modify the
definition of a virtual host and file path to the website established / webapp, adding context segment host segment
[root @ tomcat-1 ~] # cp / usr / local / tomcat7 / conf / server {.xml,. BAK}
[the root-Tomcat @ ~. 1] Vim /usr/local/tomcat7/conf/server.xml #
124 <= the Host name "localhost" the appBase = "the webapps"
125 = unpackWARs "to true" = the autoDeploy "to true">
126 <= the docBase the Context "/ the webapp" path = "" Reloadable = "flase">
127 </ the Context>
the docBase = "/ the webapp" reference document #web application directory
path = "" # set default "class "
Reloadable =" flase "monitoring set #" class "is a change
closed tomcat, restart
[root @ tomcat-1 ~] # / usr / local / tomcat7 / bin / shutdown.sh
Using CATALINA_BASE: /usr/local/tomcat7
Using CATALINA_HOME: /usr/local/tomcat7
CATALINA_TMPDIR the Using: / usr / local / tomcat7 / the TEMP
the Using JRE_HOME: / usr / local / the Java
the Using the CLASSPATH: /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar
[the root-Tomcat @ ~. 1] # /usr/local/tomcat7/bin/startup.sh
the Using CATALINA_BASE: / usr / local / tomcat7
the Using CATALINA_HOME: / usr / local / tomcat7
the Using CATALINA_TMPDIR: / usr / local / tomcat7 / TEMP
JRE_HOME the Using: / usr / local / the Java
the Using the CLASSPATH: /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar
. Tomcat Started
browser to access the test http: // 192.168.200.103:8080
============================================= ================================================== ==================
substantially the same configuration Tomcat 1 Tomcat 2
Mounting the JDK, Java environment configuration, version maintains consistent Tomcat 1
installed Tomcat, Tomcat 1 is consistent with the version
[2-Tomcat the root @ ~] # Vim /webapp/index.jsp
Server Info:
the SessionID: <% = session.getId ( )%>
<br>
SessionIP: <% = to request.getServerName ()%>
<br>
SessionPort: <% = to request.getServerPort ()%>
<br>
<%
Out.println ( "TWO Server");
%>
[2-Tomcat the root @ ~]} /usr/local/tomcat7/conf/server.xml{,.bak CP #
[2-Tomcat the root @ ~] Vim /usr/local/tomcat7/conf/server.xml #
124 <the Host name = "localhost" the appBase = "the webapps"
125 = unpackWARs "to true" the autoDeploy = "to true">
126 <= the docBase the Context "/ the webapp" path = "" reloadable="flase" >
127 </Context>
[root @ Tomcat-2 ~] # /usr/local/tomcat7/bin/shutdown.sh
[root @ Tomcat-2 ~] # /usr/local/tomcat7/bin/startup.sh
browser to access the test http: // 192.168.200.104:8080
============================================= ================================================== ==================
Tomcat configuration instructions
/ usr / local / tomcat7 # home directory
bin # activate or deactivate the store windows or linux platform Tomcat script file
conf # store various global Tomcat configuration file, server.xml and foremost of which is the web.xml
lib # storage library files needed to run Tomcat (JARS)
logs # LOG files stored execution of Tomcat
webapps directory publishing major Web #Tomcat ( comprising the application instances)
class files generated by the compiler jsp stored work #
[root @ tomcat-1 ~] # ls / usr / local / tomcat7 / conf /
catalina.policy # access control profile
catalina.properties #Tomcat profile attributes
context.xml # context configuration files (SELinux)
the logging.properties # log log file configuration
server.xml # master configuration file
tomcat-users.xml # manager- gui manage user profile (generated after Tomcat installation management interface, the file can be opened to access)
the web.xml #Tomcat a servlet, servlet-mapping, filter, MIME , etc. Related
server.xml main configuration file can be modified to enable the interface set root of the site, web hosting, open https and other functions.
structure constituting server.xml
<Server>
<-Service>
<Connector />
<Engine>
<the Host>
<the Context> </ the Context>
</ the Host>
</ Engine>
</-Service>
<
<! - -> content is within the gaze Information
Server
Server element represents the entire Catalina Servlet Container
Service
Service is a collection; it is composed of one or more Connector, and an Engine, responsible for all Connector obtained customer requests.
Connector
a Connector listens for client requests on a designated port and a request to obtain the Engine to handle, get a response from the Department Engine and returned to the client.
There are two typical TomcatEngine Connector, listen for http requests directly from a browser, and listens for a request from the other webserver
Coyote Http / 1.1 Connector 8009 at the listening port from other wenserver (Apache) a servlet / jsp proxy request.
Engine
under Engine can configure multiple virtual hosts the Virtual Host, each virtual server has a domain name
when a request to obtain Engine, which matches the request to one of the Host, and Host to which the request is to be processed,
Engine there is a default virtual host, when the request can not be matched to any time on a host, will be handed over to handle the default host
host
on behalf of a virtual host, virtual hosts, each virtual host and a network domain name domain Name to match
each The next virtual host can deploy (deploy) one or more Web app, each corresponding to a web app Context, there is a Context path.
When a Host obtaining request, the request will be matched to a Context, then the request to the Context processed, the longest matching method match, so a path == "" Context will be of the Host default Context match.
Context
a Context corresponding to a Web application, a Web application Servlet by one or more components.
================================================== ================================================== =============
Nginx-server configuration. 1:
[the root-Nginx @ ~. 1] # yum the install PCRE -Y-devel zlib-devel OpenSSL-devel
[the root-Nginx @ ~. 1] # -M -s the useradd / sbin / nologin Nginx
[the root-Nginx @ ~. 1] # XF Nginx the tar-1.6.2.tar.gz
[the root-Nginx @ ~. 1] # CD-1.6.2 Nginx
[root @ nginx-1 nginx- 1.6.2] # ./configure --prefix = / usr / local / nginx --user = nginx --group = nginx --with-file-aio --with-http_stub_status_module - --with-http_flv_module-http_ssl_module with --with-http_gzip_static_module && && the make the make the install
--prefix = / usr / local / Nginx # specify the installation directory
--user = nginx --group = nginx specified user and group run #
- -with-file-aio # enable file modification support
--with-http_stub_status_module # enabled statistics
--with-http_ssl_module # ssl-enabled module
--with-http_flv_module # flv enabled module, seek to provide memory-based file offset time
--with-http_gzip_static_module # enable gzip compression static
configuration nginx.conf
[@ Nginx the root-Nginx-1.6.2. 1]} # CP /usr/local/nginx/conf/nginx.conf{,.bak
[root@nginx-1 nginx-1.6.2]# vim /usr/local/nginx/conf/nginx.conf
=================================================================================================================
user nginx;
worker_processes 1;
error_log logs/error.log;
pid logs/nginx.pid;
events {
use epoll;
worker_connections 10240;
}
http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log logs/access.log main;
sendfile on;
keepalive_timeout 65;
upstream tomcat_server {
server 192.168.200.103:8080 weight=1;
server 192.168.200.104:8080 weight=1;
}
server {
listen 80;
server_name localhost;
location / {
root html;
index index.html index.htm;
proxy_pass http://tomcat_server;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
=================================================================================================================
[root@nginx-1 nginx-1.6.2]# /usr/local/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@nginx-1 nginx-1.6.2]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
[root@nginx-1 nginx-1.6.2]# netstat -anpt |grep :80
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 7184/nginx
[root@nginx-1 nginx-1.6.2]# ps aux |grep nginx
7184 0.0 1052 0.2 45000 the root Ss 01:18 0:00 Nginx:? Master Process / usr / local / Nginx / sbin / Nginx /usr/local/nginx/conf/nginx.conf -C
? WWW 0.0 1.1 7185 5452 S 49256 0:00 nginx 01:18: worker Process
root 7193 0.0 0.1 103 256 848 PTS / + 1 S 01:18 0:00 grep nginx
client test:
open a browser to access: http://192.168.200.101 # continually refresh can be seen due to the weight the same, the page will switch
nginx-2 server configuration:
configuration consistent with the server nginx-1
client test:
open a browser to access: http://192.168.200.102 # constantly refresh the same can be seen due to the heavy weight, the page will repeatedly switch
================================================ ================================================== ===============
How it works: Two Nginx generated by Keepalived two examples, two sets of VIP Nginx back up each other, if any one Nginx machine hardware damage occurred, Keepalived will automatically switch its VIP address to another machine, does not affect customers end of the visit.
On nginx1 / 2 compiler installation keepalived Service:
[nginx1 the root @ ~] # yum the install -Y-OpenSSL Kernel-devel devel
[nginx1 the root @ ~] # keepalived the tar-XF 1.2.13.tar.gz
[ ~ @. 1-Nginx the root] # CD-keepalived 1.2.13
[@ Nginx the root-1.2.13-keepalived. 1] # ./configure --prefix = /-Kernel---with the dir = / usr / the src / kernels' / 2.6.32-504.el6.x86_64 / && && the make the make the install
[the root-Nginx @ ~. 1] # the chkconfig --add keepalived
[the root-Nginx @ ~. 1] # keepalived the chkconfig ON
[the root-Nginx @ ~. 1] # --list keepalived the chkconfig
. 3, modify the configuration file keepalived
[the root-Nginx @ ~. 1] # Vim /etc/keepalived/keepalived.conf
! keepalived the configuration file for
global_defs {
notification_email {
[email protected]
}
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 123
}
virtual_ipaddress {
192.168.200.254
}
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 52
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123
}
virtual_ipaddress {
192.168.200.253
}
}
=================================================================================================================
[root@nginx-2 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
}
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123
}
virtual_ipaddress {
192.168.200.254
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 52
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 123
}
virtual_ipaddress {
192.168.200.253
}
}
[root@nginx-1 ~]# service keepalived start
[root@nginx-1 ~]# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:2d:3d:97 brd ff:ff:ff:ff:ff:ff
inet 192.168.200.202/24 brd 192.168.200.255 scope global eth0
inet 192.168.200.254/32 scope global eth0
inet6 fe80::20c:29ff:fe2d:3d97/64 scope link
valid_lft forever preferred_lft forever
[root@nginx-2 ~]# service keepalived start
[root@nginx-2 ~]# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:6f:7d:87 brd ff:ff:ff:ff:ff:ff
inet 192.168.200.102/24 brd 192.168.200.255 scope global eth0
inet 192.168.200.253/32 scope global eth0
inet6 fe80::20c:29ff:fe6f:7d87/64 scope link
valid_lft forever preferred_lft forever
Client test:
Open a browser to access: http://192.168.200.253 # constantly refresh the same can be seen due to the heavy weight, the page will switch
client test:
Open a browser to access: http://192.168.200.254 # can be constantly refreshed see due to the weight of the same page will be repeatedly switched
nginx-1/2 two machines perform monitoring Nginx process of script
[root @ nginx-1 ~] # CAT nginx_pidcheck
! # / bin / bash
the while:
do
nginxpid = `PS - Nginx header --no-C | WC -l`
IF [$ nginxpid -eq 0]
the then
/ usr / local / Nginx / sbin / Nginx
keeppid = $ (PS -C keepalived --no-header | WC -l)
IF [$ keeppid -eq 0]
the then
/etc/init.d/keepalived Start
Fi
SLEEP. 5
PS = `-C Nginx nginxpid --no-header | WC -l`
IF [$ nginxpid -eq 0]
the then
/etc/init.d/keepalived STOP
Fi
Fi
SLEEP. 5
DONE
[the root-Nginx @ ~. 1] # SH & nginx_pidcheck
[the root-Nginx @ ~. 1] # Vim /etc/rc.local
SH & nginx_pidcheck
this script executes an endless loop, the machine has two Nginx execute this script, performed once every 5 seconds, by ps - C is the command to collect PID value nginx is in the end is 0 if it is 0, then, that Nginx has process dies, try to start nginx process; if it continues to 0, that Nginx fails to start, turn off the machine Keeplaived service, VIP address will be taken over by the backup machine, of course, the entire site will all be served by Nginx backup machine, thus ensuring high availability Nginx services.
Test script:
[root @ nginx-1 ~] # netstat -anpt | grep nginx
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 4321 / nginx
[root@nginx-1 ~]# killall -s QUIT nginx
[root@nginx-1 ~]# netstat -anpt |grep nginx
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 59418/nginx
VIP转移测试：
[root@nginx-1 ~]# ip addr show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:2d:3d:97 brd ff:ff:ff:ff:ff:ff
inet 192.168.200.101/24 brd 192.168.200.255 scope global eth0
inet 192.168.200.254/32 scope global eth0
inet6 fe80::20c:29ff:fe2d:3d97/64 scope link
valid_lft forever preferred_lft forever
[root@nginx-2 ~]# service keepalived stop
停止 keepalived： [确定]
[the root @ Nginx-. 1 ~] # IP addr Show dev eth0
2: eth0: <BROADCAST, the MULTICAST, the UP, LOWER_UP> MTU 1500 qdisc allows users to pfifo_fast State the UP of qlen 1000
Link / ether 00: 0c: 29: 2D: 3D: 97 brd FF: FF: FF: FF: FF: FF
inet 192.168.200.101/24 brd 192.168.200.255 scope, Ltd. Free Join eth0
inet 192.168.200.254/32 scope, Ltd. Free Join eth0
inet 192.168.200.253/32 scope, Ltd. Free Join eth0
inet6 fe80 :: 20c: 29ff: fe2d: 3d97 / 64-scope Link
valid_lft Forever Forever preferred_lft
client test:
open a browser to access: http://192.168.200.253 # constantly refresh the same can be seen due to the heavy weight, the page will switch
client test:
open a browser to access: http://192.168.200.254 # constantly refresh the same can be seen due to the heavy weight, the page will switch
============================= ================================================== ==================================
[root@tomcat-1 ~]# yum -y install gcc openssl-devel pcre-devel zlib-devel
[root@tomcat-1 ~]# tar xf libevent-2.0.15-stable.tar.gz
[root@tomcat-1 ~]# cd libevent-2.0.15-stable
[root@tomcat-1 libevent-2.0.15-stable]# ./configure --prefix=/usr/local/libevent && make && make install
[root@tomcat-1 ~]# tar xf memcached-1.4.5.tar.gz
[root@tomcat-1 ~]# cd memcached-1.4.5
[root@tomcat-1 memcached-1.4.5]# ./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent/ && make && make install
[root@tomcat-1 memcached-1.4.5]# ldconfig -v |grep libevent
libevent_pthreads-2.0.so.5 -> libevent_pthreads.so
libevent-2.0.so.5 -> libevent.so
libevent_extra-2.0.so.5 -> libevent_extra.so
libevent_core-2.0.so.5 -> libevent_core.so
libevent_openssl-2.0.so.5 -> libevent_openssl.so
libevent_extra-1.4.so.2 -> libevent_extra-1.4.so.2.1.3
libevent_core-1.4.so.2 -> libevent_core-1.4.so.2.1.3
libevent-1.4.so.2 -> libevent-1.4.so.2.1.3
[root@tomcat-1 memcached-1.4.5]# /usr/local/memcached/bin/memcached -u root -m 512M -n 10 -f 2 -d -vvv -c 512
/usr/local/memcached/bin/memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory
[root@localhost memcached-1.4.5]# vim /etc/ld.so.conf
include ld.so.conf.d/*.conf
/usr/local/libevent/lib/
[root@localhost memcached-1.4.5]# ldconfig
[root @ localhost memcached-1.4.5] # / usr / local / memcached / bin / memcached -u root -m 512M -n 10 -f 2 -d -vvv -c 512
Options:
-h # view help information
-p # memcached is listening port number specified default 11211
the -l #memcached server's ip address
-u user identity using runtime #memcached program must be root
-m # specify how much physical memory the data stored in the machine's default 64M
-c # memcached service the maximum number of links
-vvv # display detailed information about
the minimum space -n #chunk size in bytes is the number of
multiple -f #chunk size of the default size increase 1.25 times
-d # started in the background
[root @ tomcat-1 ~ ] # netstat -antp | grep: 11211 # ( detection memecached is alive, memcacehd port 11211)
tcp 0 0 0.0.0.0:11211 0.0.0.0:* LISTEN 71559 / memcached
tcp 0 0 ::: 11211 ::: * LISTEN 71559 / memcached
test memcached can access the data
[the root-Tomcat @ ~. 1] -Y # yum the install Telnet
[the root @ localhost ~] # Telnet 192.168.200.103 11211
SET username . 8 0 0
zhangsan
STORED
GET username
of VALUE 0. 8 username
zhangsan
the END
quit
connection Closed by Foreign Host.
Finally performed so Tomcat-1 Tomcat-2 by (MSM) Memcached connected to
the "* .jar copied to / usr session package / local / tomcat7 / lib / below
[root @ tomcat-1 ~] # cp session / * / usr / local / tomcat7 / lib /
edit tomcat profile connection specified memcached server
tomcat-1 and tomcat-2 profile identical, are According to the sample to write about
[root @ tomcat-1 ~] # vim /usr/local/tomcat7/conf/context.xml
<Context>
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="memA:192.168.200.104:11211 memB:192.168.200.105:11211"
requestUrilgnorePattern=".*\(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
</Context>
[root@tomcat-2 ~]# vim /usr/local/tomcat7/conf/context.xml
<Context>
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="memA:192.168.200.104:11211 memB:192.168.200.105:11211"
requestUrilgnorePattern=".*\(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
</ The Context>
[the root-Tomcat @ ~. 1] # /usr/local/tomcat7/bin/shutdown.sh
[the root-Tomcat @ ~. 1] # /usr/local/tomcat7/bin/startup.sh
If successful, tomcat the port will be connected together Memcached, before and after the change
Tomcat-1 and Tomcat-2 below
[the root-Tomcat @ ~. 1] # -antp the netstat | grep Java
TCP 0 0 FFFF ::: 127.0.0.1: ::: 8005 LISTEN 62496 * / the Java
tcp 0 0 ::: 8009 ::: * LISTEN 62496 / the Java
tcp 0 0 ::: 8080 ::: * LISTEN 62496 / the Java
tcp 0 0 :: ffff: 192.168.200.10: 28232 :: ffff : 192.168.200.10: 11211 ESTABLISHED 62496 / java
tcp 0 0 ::ffff:192.168.200.10:28231 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java
tcp 0 0 ::ffff:192.168.200.10:28230 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java
tcp 0 0 ::ffff:192.168.200.10:28228 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java
tcp 0 0 ::ffff:192.168.200.10:28229 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java
[root@tomcat-1 ~]# netstat -antp|grep memcached
tcp 0 0 0.0.0.0:11211 0.0.0.0:* LISTEN 62402/memcached
tcp 0 0 192.168.200.103:11211 192.168.200.103:28230 ESTABLISHED 62402/memcached
tcp 45 0 192.168.200.103:11211 192.168.200.103:28228 ESTABLISHED 62402/memcached
tcp 0 0 192.168.200.103:11211 192.168.200.103:28232 ESTABLISHED 62402/memcached
tcp 0 0 192.168.200.103:11211 192.168.200.103:28229 ESTABLISHED 62402/memcached
tcp 0 0 192.168.200.103:11211 192.168.200.103:28231 ESTABLISHED 62402/memcached
tcp 0 0 :::11211 :::* LISTEN 62402/memcached
nginx + keepalived + tomcat + memcache dual VIP session remains high availability and Session
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Origin www.cnblogs.com/zc1741845455/p/10944011.html
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