Knowledgebase

Introduction

Knative CLI (kn) is a terminal based tool that allows you to deploy and manage Knative services in a Kubernetes Cluster without creating YAML files. It offers a user friendly command line interface and uses existing Kubectl configurations to connect to a Kubernetes cluster. Follow the steps in this article to install Knative CLI on a Rcs Cloud Server.

Prerequisites

Before you begin:

• Deploy a Linux Server on Rcs

• Using SSH, access the server

• Create a non-root user with sudo privileges

• Switch to the new non-root user account

    # su - sysadmin

Install Knative CLI

To install the Knative CLI tool on your server, you can either use a release binary file or Go. To install the latest version, it's recommended to use the Golang method while the release binary file allows you to implement a specific version on your choice. Depending on your choice, install Knative CLI as described in the steps below.

Install Knative CLI using the Latest Release Binary File

1. Download the latest Knative CLI latest release file

    $ wget https://github.com/knative/client/releases/download/knative-v1.11.0/kn-linux-amd64

   The above command downloads version v1.11.0, visit the Knative Client releases page to verify the latest version to install on your server

2. Move the downloaded kn-linux-amd64 binary file to the /usr/local/bin/ directory and rename it to kn to enable it as a system wide command

    $ sudo mv kn-linux-amd64 /usr/local/bin/kn

3. Enable execution privileges on the kn binary file

    $ sudo chmod +x /usr/local/bin/kn

4. Switch to your user home directory

    $ cd

5. Verify the installed Knative CLI version

    $ kn version

   Your output should look like the one below:

    Version:      v20231007-local-807181fb
    Build Date:   2023-10-07 18:06:36
    Git Revision: 807181fb
    Supported APIs:
    * Serving
      - serving.knative.dev/v1 (knative-serving v0.38.1-0.20230921205527-0d73dfe0f295)
    * Eventing
      - sources.knative.dev/v1 (knative-eventing v0.38.1-0.20230921080814-ceecbb01e116)
      - eventing.knative.dev/v1 (knative-eventing v0.38.1-0.20230921080814-ceecbb01e116)

   You have installed the Knative CLI tool using the official binary release file. Run kn --help to view the list of commands you can run using the tool

Install Knative CLI using Go

1. Install the Golang package on your server

   Ubuntu/Debian Systems:

    $ sudo apt install golang

   CentOS/RockyLinux/AlmaLinux/RHEL Systems:

    $ sudo dnf install golang

2. Verify the installed Go version

    $ go version

   Output:

    go version go1.20.3 linux/amd64

3. Clone the Knative Client repository

    $ git clone https://github.com/knative/client.git

4. Switch to the new client directory

    $ cd client

5. List files and verify that Knative files are available in the directory

    $ ls

   Output:

    CHANGELOG.adoc  CODE-OF-CONDUCT.md  CONTRIBUTING.md  DEVELOPMENT.md  go.mod  hack  LICENSE  OWNERS_ALIASES  README.md  third_party  vendor
    cmd             config              conventions      docs            go.sum  lib   OWNERS   pkg             test       tools

6. Build a new executable binary file

    $ hack/build.sh -f

   Output: