How to deploy Netflix's OpenSSL patch in Nginx

Nginx is a high-performance web server and reverse proxy server that is widely used. Due to its high-speed and stable characteristics, it is used by Netflix as the main server of the streaming media platform. However, Netflix has also developed a patch called OpenSSL for Nginx to enhance security and stability. In this article, we will discuss how to deploy Netflix’s OpenSSL patch in Nginx.

1. Download the OpenSSL patch

First you need to download Netflix’s OpenSSL patch. This patch can be downloaded from GitHub, use the following command:

$ git clone https://github.com/Netflix/openssl.git

2. Install dependencies

To install Netflix's OpenSSL patch on your local computer, you first need to meet the following conditions:

• OpenSSL development tools;
• Support libraries required by OpenSSL, such as zlib.

Depending on the operating system and package manager you are using, you can install these dependencies using the following commands:

Ubuntu:

$ sudo apt-get install build-essential libssl-dev zlib1g-dev

CentOS:

$ sudo yum install gcc zlib-devel openssl-devel

3. Compile and install OpenSSL

Then, before compiling and installing the Netflix patch, you need to compile and install OpenSSL with the support library. Our examples will use OpenSSL version 1.1.1. To install it from source, use the following command:

$ cd openssl && ./config --prefix=/usr/local --openssldir=/usr/local/openssl && make && sudo make install

In this process, the --prefix option specifies the installation path of OpenSSL. The last sudo make install command will install it into /usr/local.

4. Patch

After installing OpenSSL, you can start to apply Netflix patch for Nginx. Netflix's patch mainly consists of two parts: the OpenSSL branch and the application of the patch.

First, switch to the OpenSSL branch:

$ cd openssl
$ git checkout OpenSSL_1_1_1-stable

This will switch your Git branch to match the OpenSSL version required for the Netflix patch. Next, you need to apply the patch. You can install the patch using the following command:

$ cd ..
$ patch -p1 < openssl/patches/001-netflix-ossl-1.1.1.patch

This command will apply the Netflix patch and integrate it into OpenSSL. Finally, rebuild OpenSSL:

$ cd openssl
$ ./config --prefix=/usr/local --openssldir=/usr/local/openssl && make && sudo make install

Now you have built and installed OpenSSL with support for Netflix's OpenSSL patch.

5. Compile and install Nginx

Now, you can compile and install Nginx to integrate the Netflix patch. To compile Nginx, you need to provide information about the OpenSSL version and installation path that will be used. This can be done in the configure command as follows:

$ ./configure --with-openssl=../openssl --with-http_ssl_module --prefix=/usr/local/nginx

The above command will tell Nginx to use the OpenSSL 1.1.1 version you compiled earlier and make it use the HTTP SSL module. The final --prefix option specifies the installation path of Nginx.

After completing the configuration, you can run the following command to compile and install Nginx:

$ make && sudo make install

Now, you have successfully integrated Netflix’s OpenSSL patch in Nginx.

Conclusion

Using Netflix’s OpenSSL patch to enhance the security and stability of Nginx is an essential step for Nginx deployment. In this tutorial, we discussed how to download and install Netflix’s OpenSSL patch and integrate it with your Nginx server. This will help you improve the security and stability of Nginx to better run your web applications and other related services.

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