无法连接到EC2 Tomcat本地主机

Question

I've followed a lot of tutorials and questions which been asked before, but still no good (I'm total beginner in ec2)

I've did the following: lunched Amazon Linux AMI 2015.09.1 (HVM), SSD Volume Type.

sudo yum install tomcat8-webapps tomcat8-admin-webapps
sudo yum install tomcat8
sudo service tomcat8 start

I've added this rule to my security group inbound:

HTTP
TCP
80
0.0.0.0/0

but when I try to browse to: Public DNS:8080

I get:

This webpage is not available: ERR_CONNECTION_TIMED_OUT

I expect to see the tomcat welcome page (as I go to localhost:8080) so I could deploy my war file.

what am I missing?

Thanks.

Answer 1

If Tomcat itself if running, you need to add a inbound TCP rule for port 8080 in your Security Groups from AWS Console.

You may also check if Tomcat is running at port 8080 simply by issuing a

curl localhost:8080

Note : Only open necessary ports for public access because of security reasons.Tomcat GUI Manager also have to be enabled, Do not use the default username/password of tomcat/tomcat. Use a more secure password.

Answer 2

First check:

$ netstat -lnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN     
tcp        0      0 0.0.0.0:8000            0.0.0.0:*               LISTEN     
tcp6       0      0 127.0.0.1:8080          :::*                    LISTEN     
tcp6       0      0 ::1:631                 :::*                    LISTEN     
tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN   

You need add tomcat parameters (catalina.sh):

JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Addresses=true "

Answer 3

要解决此问题，您需要在AWS中配置负载均衡器，并将端口转发设置为本地计算机（外部端口（8080）->内部端口（8080））。