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Introduction and Setup

This topic provides a summary of the goals and outcomes for the tutorial and also lists the prerequisites to set up your environment before you begin.

Summary​

This tutorial introduces you to installing an application on a Linux virtual machine (VM) using Replicated Embedded Cluster. Embedded Cluster allows you to distribute a Kubernetes cluster and your application together as a single appliance, making it easy for enterprise users to install, update, and manage the application and the cluster in tandem.

In this tutorial, you use a sample application to learn how to:

  • Add the Embedded Cluster Config to a release
  • Use Embedded Cluster to install the application on a Linux VM

Set Up the Environment​

Before you begin, ensure that you have access to a VM that meets the requirements for Embedded Cluster:

  • Linux operating system

  • x86-64 architecture

  • systemd

  • At least 2GB of memory and 2 CPU cores

  • The filesystem at /var/lib/embedded-cluster has 40Gi or more of total space and must be less than 80% full

    note

    The directory used for data storage can be changed by passing the --data-dir flag with the Embedded Cluster install command. For more information, see Change the Default Data Directory in Installing with Embedded Cluster.

    Note that in addition to the primary /var/lib/embedded-cluster directory, Embedded Cluster creates directories and files in the following locations:

    • /etc/cni
    • /etc/k0s
    • /opt/cni
    • /opt/containerd
    • /run/calico
    • /run/containerd
    • /run/k0s
    • /sys/fs/cgroup/kubepods
    • /sys/fs/cgroup/system.slice/containerd.service
    • /sys/fs/cgroup/system.slice/k0scontroller.service
    • /usr/libexec/k0s
    • /var/lib/calico
    • /var/lib/cni
    • /var/lib/containers
    • /var/lib/kubelet
    • /var/log/calico
    • /var/log/containers
    • /var/log/pods
    • /usr/local/bin/k0s

  • (Online installations only) Access to replicated.app and proxy.replicated.com or your custom domain for each

  • Embedded Cluster is based on k0s, so all k0s system requirements and external runtime dependencies apply. See System requirements and External runtime dependencies in the k0s documentation.

Next Step​

Install the Replicated CLI and create an application in the Replicated Vendor Portal. See Step 1: Create an Application.