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qinfengge

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Use WSL to create a copy configuration subnode for idea.

Recently, I have been learning Spring Cloud and came across Eureka. I found that IDEA now supports copying instances to WSL, so I decided to explore it myself.

image-20220707131958866

Configuration of WSL#

If you are not familiar with WSL or have not installed it yet, please search for it on your own.

The following content is based on Ubuntu 20, please replace the commands with the appropriate ones for other versions.

Installing JDK#

If you don't have JDK, you won't be able to run Spring Boot or Cloud projects in your WSL environment. Therefore, installing JDK is the first step.

Installing JDK on Ubuntu is much simpler compared to Windows, as it doesn't require setting environment variables. Just one command is enough.

apt install openjdk-8-jre-headless  	# Install openjdk 8

After installation, use the following command to check the version:

java -version		# Check the version

Configuring JDK Path#

After installation, you need to configure the JDK path in IDEA for WSL.

image-20220707132903716

The default configuration is:

/usr/lib/jvm/java-8-openjdk-amd64

Configuration of Copied Instance#

Select an instance running on your local Windows machine, right-click and choose "Copy Configuration" to copy the instance.

image-20220707134154932

Next, you need to modify the configuration of the copied instance, such as the port. If you don't make any changes, there may be port conflicts.

It is recommended to write the configuration information in the format of application.properties for easy copying.

Configure the port in VM options using the shortcut Alt + V:

-Dserver.port=8082		# Use 8082 to override the original port

Configure the Eureka and database information in Program arguments using the shortcut Alt + R:

# Replace 192.168.0.192 with the IP address of your local Windows machine, and 10086 with the port configured for Eureka
--eureka.client.service-url.defaultZone=http://192.168.0.192:10086/eureka
# Modify the database configuration
--spring.datasource.url=jdbc:mysql://192.168.0.192:3306/cloud_user?useSSL=false
--spring.datasource.username=root
--spring.datasource.password=root
--spring.datasource.driver-class-name=com.mysql.jdbc.Driver

Notes#

If you want to test whether you can access the MySQL database on Windows, you can install MySQL:

apt-get install mysql-server

Then, test remote access to MySQL:

mysql -h 192.168.0.192 -uroot -p

If you encounter a timeout error, you need to open port 3306 on Windows.

Open the Windows Firewall and select "New Rule" on the right side of Inbound Rules.

image-20220707134749535

Choose "Port".

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Enter the default MySQL port 3306.

image-20220707134842610

Click "Next" and proceed with the default settings.

Summary#

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As you can see, Eureka has discovered 2 instances: one running on Windows and one running on WSL.

image-20220707135154328

There is no problem accessing the database.

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