golang deployment soft connection

I have been learning Golang recently and feel that this language is very easy to use, so I want to deploy my own code to the server. During the deployment process, I discovered a very useful tool - soft connection. Let me share with you how to use soft connection in Golang.

What is a soft connection?

Under the Linux system, a soft link is a special file type, also called a symbolic link, which occupies an independent position in the file system. A soft link refers to linking a file to another place. The other place can be a file, folder or a URL.

Soft links are different from hard links. A hard link creates a new file in the file system with a different file name but points to the same data block. A soft link only creates a file name pointing to another file, and the pointed file can be another file at any location.

Why use soft connections?

The use of soft connections has the following benefits:

1. Save space. There is no need to copy the source file or directory, just create a filename link.
2. Better readability. The name of a soft link can better describe the purpose of the target file or directory, and the relationship between the links.
3. Better maintainability. If the file location changes or files need to be deleted, there is no need to modify multiple codes and configuration files, but only the links.

Using soft connections in Golang

When we need to reference some external libraries in Golang development, we can download the libraries to the local through the go get command. However, when deploying, we need to copy these library files to the deployment directory to ensure that the code can run normally. If we use hard links, these files will need to be re-copied every time the code is updated. Soft connections can help us save space and improve code readability and maintainability.

The following are the steps to use soft connections on Ubuntu systems:

1. Add the soft connection path to the GOPATH environment variable

First we need to add the soft connection path to At the front of the GOPATH environment variable, Golang will first search for the code in the soft link path, and if it cannot be found, it will search in other directories.

Open the ~/.bashrc file and add the following code at the end of the file:

export GOPATH=/var/www/gopath:/home/ubuntu/go

In the above code, /var/www/gopath is the directory where we want to use soft links, /home/ ubuntu/go is the alternate GOPATH path.

2. Create a soft link

Create a soft link in the GOPATH directory. The command is as follows:

ln -s [目标文件或目录] [软链接路径]

For example, we need to link the src directory in the current directory to / In the var/www/gopath/src directory, you can use the following command:

cd $GOPATH
ln -s /home/ubuntu/myapp/src src

In the above code, the $GOPATH variable will automatically be replaced with the currently set GOPATH path.

3. Test whether the soft link is successful

After creating the soft link, we can use the command to test whether the soft link is successful:

ls -l $GOPATH/src

If a message similar to the following appears, It means that the soft link has been created successfully:

lrwxrwxrwx 1 ubuntu ubuntu 15 Dec 17 12:02 src -> /home/ubuntu/myapp/src

Next, we can happily use Golang for development and deployment.

Summary

By using soft connections, we can save space during deployment, improve code readability and maintainability, making the deployment of Golang applications faster and more efficient. In actual development and deployment, we can flexibly use soft links to meet our specific needs.

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