---
title: Mirror required content
exercise: 2
date: '2024-08-23'
tags: ['openshift','containers','kubernetes','disconnected']
draft: false
authors: ['default']
summary: "You want features? Mirror them in!🪞"
---

The disconnected OpenShift cluster you have been allocated is the result of a very standard installation, and does not have any post installation features added.

During this workshop we want to secure the cluster with Advanced Cluster Security, understand our compliance posture against NIST 800-53 with the OpenShift Compliance Operator and then make it easy for our Developers to do the right thing with Red Hat Developer Hub.

To install and configure these features we first need to mirror some additional content into our disconnected environment, let's get started.

## 2.1 - Open a terminal on your low side

Our first step to prepare to mirror content is to get connected to our low side jump host via `ssh`. Replace the placeholder ip address below with the actual ip address you've been allocated for your environment.

```bash
ssh lab-user@<placeholder>
```
You'll be prompted to enter a password which you can find in your allocated environment details.

After connecting change directory to the low side workspace where the intial cluster installation was already completed for you and review the folder contents:

```bash
cd /mnt/low-side-data

ls -lah
```

Your workspace will look similar to the one below:

```bash
[lab-user@jump low-side-data]$ ls -lah
total 25G
drwxr-xr-x. 4 lab-user lab-user 4.0K Aug 22 00:22 .
drwxr-xr-x. 3 root     root       27 Aug 19 04:10 ..
-rw-r--r--. 1 lab-user lab-user  473 Aug 22 00:10 imageset-config.yaml
-rw-r--r--. 1 lab-user lab-user 696M Aug 21 23:57 mirror-registry.tar.gz
-rw-r--r--. 1 lab-user lab-user  24G Aug 22 00:22 mirror_seq1_000000.tar
-rwxr-xr-x. 1 lab-user lab-user 146M Mar 26 22:17 oc
-rwxr-x--x. 1 lab-user lab-user 144M Mar 22 18:34 oc-mirror
-rw-------. 1 lab-user lab-user 183K Aug 22 00:16 .oc-mirror.log
drwxr-xr-x. 3 lab-user lab-user   17 Aug 22 00:13 oc-mirror-workspace
-rwxr-xr-x. 1 lab-user lab-user 630M Mar 22 19:32 openshift-install
drwxr-x---. 2 lab-user lab-user   28 Aug 22 00:22 publish
```

## 2.2 - Get familiar with oc-mirror

To mirror content into our disconnected environment we will be using the [`oc-mirror`](https://github.com/openshift/oc-mirror) openshift client utility.

To configure what content `oc-mirror` will download and mirror for us we use a YAML formatted file called an `ImageSetConfiguration`. This file declares:

1. **What to download** which can include (OpenShift itself, operator bundles, helm charts, or specific container images)
2. **What versions**
3. **Where to store the downloaded content**

As part of the initial installation of OpenShift an `ImageSetConfiguration` file has already been created for you.