Replace the original OpenJDK in CentOS and install Tomcat

Replace the original OpenJDK in CentOS and install Tomcat

In CentOS Linux, install JDK and Tomcat independently.

Jdk is replaced by the original openjdk with the jdk-Oracle-6u38 version.

[Root @ kakaka usr] # java-version
Java version "1.6.0 _ 38"
Java (TM) SE Runtime Environment (build 1.6.0 _ 38-b05)
Java HotSpot (TM) Server VM (build ipv13-b02, mixed mode)

Download jdk-6u38-linux-i586-rpm.bin to/usr directory
Change executable permissions and install

[Root @ bkjia usr] # chmod + x jdk-6u38-linux-i586-rpm.bin
[Root @ bkjia usr] #./jdk-6u38-linux-i586-rpm.bin
[Root @ bkjia usr] # vi/etc/profile

Add environment variables at the end of the file

Export JAVA_HOME =/usr/java/jdk1.6.0 _ 38
Export CLASSPATH =.: $ JAVA_HOME/jre/lib/rt. jar: $ JAVA_HOME/lib/dt. jar: $ JAVA_HOME/lib/tools. jar
Export PATH = $ JAVA_HOME/bin: $ PATH

Make environment variables take effect

[Root @ bkjia usr] # source/etc/profile

Install tomcat

Bytes

Create user, view and SET Password

# Groupadd webserver
# Useradd-m-g webserver-G webserver webapp
# Id webapp
# Passwd webapp
 
# Vi/etc/sudoers

Find the line root ALL = (ALL) ALL and add it to the bottom

Webapp ALL = (ALL) ALL

Create a directory, change permissions, and install

# Mkdir/usr/local/tomcat
# Chown-R webapp: webserver/usr/local/tomcat
# Su webapp

Use webapppermission to put apache-tomcat-6.0.36.tar.gz to/usr/local/tomcat

$ Cd/usr/local/tomcat
$ Tar-zxvf apache-tomcat-6.0.36.tar.gz
$ Vi ~ /. Bash_profile

Add Environment Variables

CATALINA_BASE =/usr/local/tomcat/apache-tomcat-6.0.36
CATALINA_HOME =/usr/local/tomcat/apache-tomcat-6.0.36
PATH = $ PATH: $ HOME/bin: $ CATALINA_HOME/bin
Export PATH

Make environment variables take effect

$ Source ~ /. Bash_profile

In/usr/local/tomcat/apache-tomcat-6.0.36/conf, modify the tomcat-user.xml

<Role rolename = "manager"/>
<User username = "webapp" password = "webapp123" roles = "manager"/>

Modify the encoding in server. xml

<Connector port = "8080" URIEncoding = "UTF-8" protocol = "HTTP/1.1"
ConnectionTimeout = "20000"
RedirectPort = "8443" type = "regxph" text = "yourobjectname"/>

Modify bin/catalina. sh and add a line in row 230 to increase tomcat runtime memory.

JAVA_OPTS = "-server-Xms1024m-Xmx2048m-XX: PermSize = 128 M-XX: MaxPermSize = 256 m"

 

Load Balancing between Apache and multiple Tomcat clusters in Linux

Nginx Tomcat Cluster load balancing solution notes

Instance details Tomcat component installation + Nginx reverse proxy Tomcat + Apache use mod_jk and mod_proxy Reverse Proxy and load balancing

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