Elastic Compute Service:Use an Alibaba Cloud Marketplace image to deploy a Java web environment

Step 1: Purchase a Java web environment image from Alibaba Cloud Marketplace and create an ECS instance from the image

You can use a Java web environment image to deploy a Java web server that can be used out of the box without the need to install and configure the server.

1. Click JAVA_nginx_tomcat_CentOS7.9_20G to go to the details page of the image.

2. Click Choose Your Plan.

3. On the Custom Launch tab of the ECS instance buy page, configure the parameters. Take note of the parameters in the following table. You can configure other parameters based on your business requirements. For information about how to configure other parameters, see Create an instance on the Custom Launch tab.

   Parameter	Example	Description
   Region	China (Hangzhou)	Select the region in which the security group that you created in the prerequisites resides.
   Network and Zone	Default VPC	Select the VPC in which the security group that you created in the prerequisites resides.
   Image	JAVA_nginx_tomcat_CentOS7.9_20G	The Alibaba Cloud Marketplace image that you purchased is automatically selected in the Image section. You do not need to configure this parameter.
   Public IP Address	Select Assign Public IPv4 Address.	In this example, you access the Java web environment deployed on the ECS instance over the Internet. You must assign a public IPv4 address to the instance when you create the instance or associate an elastic IP address (EIP) with the instance after the instance is created. For information about how to associate an EIP with an ECS instance, see Associate an EIP with an ECS instance.
   Security Group	sg-2zebli************if	Select the security group that you created in the prerequisites. A rule must be added to the security group to allow inbound traffic on ports 22 and 8080.

Step 2: Obtain the public IP address of the created ECS instance

To verify the environment configuration of the Java web server by using the public IP address of the ECS instance, you must obtain the public IP address of the instance.

1. Go to ECS console - Instance.

2. In the top navigation bar, select the region and resource group of the resource that you want to manage.

3. Find the ID of the ECS instance that you created to go to the Instance Details page and obtain the public IP address of the instance.

Step 3: Verify the environment configuration

1. Log on to the Linux ECS instance. For more information, see Connect to an instance.

2. Verify the Java environment.

   Run the following command to check the Java version and ensure that the correct Java version is installed:

   java -version

   

3. Verify the Apache Tomcat server.

   1. Run the following command to start Apache Tomcat. If the Tomcat started message appears, Apache Tomcat is started.

      Note

      In this example, /usr/local/tomcat is the default installation directory for the Apache Tomcat server in the image that you used to create the ECS instance. The installation directory may vary based on the image that you use. You can obtain the installation directory on the details page of the Alibaba Cloud Marketplace image and change the directory in the following command.

      /usr/local/tomcat/bin/startup.sh

      

   2. In the address bar of a web browser on your on-premises device, enter http://<Public IP address of the ECS instance>:8080. If the Apache Tomcat welcome page appears, the Java web environment is configured as expected.

      Note

      • If the Apache Tomcat welcome page does not appear after you enter http://<Public IP address of the ECS instance>:8080, check whether the security group allows inbound traffic on port 8080.

      • If you want to upload an on-premises project to test the environment, upload a WAR package to the webapps directory under the Apache Tomcat installation directory. In this example, the /usr/local/tomcat/webapps directory is used. Then, enter http://<Public IP address of the ECS instance>:8080/<Package name> in the address bar of a web browser to access the project. For more information, see Upload a file to or download a file from a Linux instance.

      

4. Verify the MySQL service.

   1. Run the following command to connect to MySQL. Enter the username that is used to connect to MySQL after -u. After the command is run, you are prompted to enter a password. If the password that you enter is valid and correct, your identity is authenticated. In this case, the MySQL CLI appears.

      Note

      In the image used in this example, the default username used to connect to MySQL is root and the default password that corresponds to the username is yl2vXBS%FjGoSfby. The default username and password may vary based on the image that you use. You can obtain the default username and password on the details page of your Alibaba Cloud Marketplace image and replace the username and password specified in the following command with the actual username and password.

      mysql -u root -p

      

   2. Run the following command at the MySQL CLI to view all available MySQL databases. If the command is run as expected, the MySQL service is reachable.

      SHOW DATABASES;