Install and configure apache tomcat on centos 7

1. How to start tomcat?
2. How to install SSL for tomcat server?
3. How to run tomcat on Domain name?
4. How to run Tomcat without port?

Step – 1

Install JAVA

sudo yum install java-1.8.0-openjdk.x86_64

java -version

Step – 2

1. Download tomcat, Download the version you need from the below link.

http://tomcat.apache.org/

Step – 3

2. Check the download using md5 checksum

md5sum apache-tomcat*

Step – 4

3. Extract the tar file in the /usr/local/tomcat

tar -zxvf apache-tomcat*

mv apache-tomcat* /usr/local/tomcat

Step – 5

4. Now we need to set path for both java and tomcat

vim /etc/environment

export JAVA_HOME=/usr/lib/java
export CATALINA_HOME=/usr/local/tomcat

5. How to start tomcat ?

To Start Tomcat enter this command in the terminal

$CATALINA_HOME/bin/startup.sh

6. How to check Tomcat is running or not?

netstat -ntlp

ps -ef | grep java
ps -ef | grep tomcat

http://localhost:8080/
http://192.168.122.33:8080/

7. How to install ssl on tomcat server?

keytool -genkey -alias chirag.local -keyalg RSA -keystore /etc/pki/keystore

Enter keystore password:
keytool error: java.lang.Exception: Key pair not generated, alias <chirag.local> already exists
[root@localhost conf]# keytool -genkey -alias chirag.testing -keyalg RSA -keystore /etc/pki/keystore
Enter keystore password:
What is your first and last name?
[Unknown]: techouse
What is the name of your organizational unit?
[Unknown]: techouse
What is the name of your organization?
[Unknown]: techouse
What is the name of your City or Locality?
[Unknown]: ghaziabad
What is the name of your State or Province?
[Unknown]: Delhi
What is the two-letter country code for this unit?
[Unknown]: IN
Is CN=techouse, OU=techouse, O=techouse, L=ghaziabad, ST=Delhi, C=IN correct?
[no]: yes

Enter key password for <chirag.testing>
(RETURN if same as keystore password):
Re-enter new password:

Warning:
The JKS keystore uses a proprietary format. It is recommended to migrate to PKCS12 which is an industry standard format using "keytool -importkeystore -srckeystore /etc/pki/keystore -destkeystore /etc/pki/keystore -deststoretype pkcs12".

8. Now we need to edit server.xml to configure SSL

vim /usr/local/tomcat/conf/server.xml

#find Connector port using below command and edit port and enable the ssl
/Connector port

<Connector port="8443" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443"
SSLEnabled="true"
scheme="https"
secure="true"
sslProtocol="TLS"
keystoreFile="/etc/pki/keystore"
keystorePass="chirag" />

9. How to run tomcat on Domain name?

Edit server.xml

vim /usr/local/tomcat/conf/server.xml

<Host name="techouse.local" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Alias>www.techouse.local</Alias>

10. How to run Tomcat on 80,443,8443 Port?

Method 1

How to run Tomcat without using port 8443 or 8080.

Running Tomcat without mentioning the port in URL.

Example :- Suppose we are running tomcat on this domain – techouse.co.in:8443

-> And need to run it without using port ie. – techouse.co.in, then follow the below steps.

For HTTPS connection set Default port 443

vim /usr/local/tomcat/conf/server.xml

<Connector port="443" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443"
SSLEnabled="true"
scheme="https"
secure="true"
sslProtocol="TLS"
keystoreFile="/etc/pki/keystore"
keystorePass="chirag" />

For HTTP connection set Default port 80

vim /usr/local/tomcat/conf/server.xml

<Connector port="80" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />

Method 2

Add VirtualHost in apache

VirtualHost

cd /etc/httpd/conf.d

vim tomcat_setup.conf

<VirtualHost *:80>
ServerName www.techouse.co.in
ProxyRequests On
ProxyPass / http://localhost:8080/Application_name/
ProxyPassReverse / http://localhost:8080/Application_name/
</VirtualHost>