How to Install Easy-RSA on Alpine Linux

Easy-RSA is a command-line tool that is used for creating, managing, and revoking certificates for OpenVPN. In this tutorial, we will be explaining how to install Easy-RSA on Alpine Linux Latest.

Prerequisites

Before proceeding with this tutorial, ensure the following has been setup:

Step 1: Install openvpn and openssl

You need to install OpenVPN and OpenSSL as dependencies for Easy-RSA. OpenVPN is an open-source software packet that enables us to create a virtual private network, which is useful for secure communication between distant systems.

sudo apk add openvpn openssl

After running the command, openvpn and openssl will be installed.

Step 2: Clone Easy-RSA repository

The Easy-RSA repository can be found on the GitHub link - https://github.com/OpenVPN/easy-rsa. To clone the repository, run the following command:

git clone https://github.com/OpenVPN/easy-rsa.git

After executing the command, it clones the Easy-RSA repository to your current working directory.

Step 3: Install Easy-RSA

First, change your current working directory to the Easy-RSA clone directory.

cd easy-rsa/easyrsa3

Next, you need to generate the required RSA files by running the easyrsa command:

./easyrsa init-pki

In the next step, enter a passphrase when prompted. This passphrase will be used to secure the created private key. Please note that this must be a strong and unique passphrase.

init-pki complete; you may now create a CA or requests.
Your newly created PKI dir is: __DIRECTORY__

After running the command, openvpn's server certificate and private key will be generated in the pki/ folder.

Now to create a CA, run the below command:

./easyrsa build-ca

Follow the steps prompted to create a CA.

Step 4: Verify Installation

You can verify the installation by checking the version of the Easy-RSA which was installed.

./easyrsa --version

It will show the current version installed.

Conclusion

In this tutorial, it has been explained to install Easy-RSA on Alpine Linux. The Easy-RSA is downloaded from GitHub and dependencies like openvpn and openssl are installed before proceeding with the installation. After that, the Easy-RSA repository was cloned, and the installation was done by generating the desired keys using easyrsa commands.

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