CentOS 7.6 安装 Apache Tomcat 8.5

安装Java

yum -y install java-1.8.0-openjdk.x86_64 java-1.8.0-openjdk-devel.x86_64

java -version

updatedb

locate jre

Before we configure the JAVA_HOME environment, we need to know where the Java directory is. Check the Java directory with the command below:

sudo update-alternatives --config java



There is 1 program that provides 'java'.

  Selection    Command
-----------------------------------------------
*+ 1           java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.302.b08-0.el7_9.x86_64/jre/bin/java)

Java directory = "/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.302.b08-0.el7_9.x86_64/jre"

Then edit the environment file with vim:

vim /etc/environment

Add the JAVA_HOME environment variable by adding the configuration below:

JAVA_HOME="/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.302.b08-0.el7_9.x86_64/jre"

Save the /etc/environment file and exit vim.

Next, edit the .bash_profile file and add the JAVA_HOME variable as well:

vim ~/.bash_profile

At the end of the file, paste the configuration below:

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.302.b08-0.el7_9.x86_64/jre
export PATH=$JAVA_HOME/bin:$PATH

Save the file, then reload the bash_profile file.

source ~/.bash_profile

Make sure there is no error, Finally check the JAVA_HOME environment variable:

echo $JAVA_HOME

安装 tomcat

Create a user and group named tomcat:

groupadd tomcat
useradd -s /bin/false -g tomcat -d /opt/tomcat tomcat

Next, go to the /opt directory and download tomcat with the wget command:

cd /opt/
wget https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.70/bin/apache-tomcat-8.5.70.tar.gz

Extract Tomcat and move all the files and directories that are in the 'apache-tomcat-8.5.6' directory to the 'tomcat' directory.

tar -xzvf apache-tomcat-8.5.70.tar.gz
mv apache-tomcat-8.5.70/* tomcat/

Now change the owner of the tomcat directory to the tomcat user and group.

chown -hR tomcat:tomcat tomcat

Go to the tomcat/bin directory and run the command 'startup.sh' to test Apache Tomcat:

cd /opt/tomcat/bin/
./startup.sh

Tomcat is using port 8080 now, check the open port on the server with the netstat command.

netstat -plntu

Or visit the server IP address with port 8080 - with a web browser. You will see the Apache Tomcat default page.

默认显示的网页是 tomcat安装目录里面的 /webapps/ROOT/index.jsp

修改默认端口

tomcat默认的端口号是8080，可以通过配置把端口号修改成80

grep 8080 /opt/tomcat/conf/server.xml
         Define a non-SSL/TLS HTTP/1.1 Connector on port 8080
    <Connector port="8080" protocol="HTTP/1.1"
               port="8080" protocol="HTTP/1.1"

vi /opt/tomcat/conf/server.xml

[root@VM-0-2-centos bin]# pwd
/opt/tomcat/bin

[root@VM-0-2-centos bin]# ./shutdown.sh

[root@VM-0-2-centos bin]# ./startup.sh

Tomcat配置Web默认页面

修改配置文件server.xml（在conf目录下）

<Host name="172.18.0.5"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
<Context path="" docBase="C:apache-tomcat-9.0.0.M22webappsROOT"/>