OpenShift in your own backyard Installing OpenShift on your servers with Assisted Installer OpenShift Container Platform is an open source enterprise-ready Kubernetes container platform. There are multiple ways to use OpenShift, including in cloud provider environments such as Amazon Web Services, Google Cloud Platform or Microsoft Azure or on your own infrastructure like RHV, Openstack or Bare Metal. Installing on bare metal servers or virtual machines can sometimes be hard. Having the ability to easily install OpenShift in your data center helps increase the productivity of the IT and Development teams. The Assisted Installer is a SaaS solution that introduces a new way to deploy a new OpenShift cluster on bare metal basically by only booting the nodes that will be part of the cluster, with an ISO generated by a service hosted in cloud.redhat.com. The service will orchestrate the needed steps based on the user parameters and report about the installation progress. All that without the need of an additional bootstrap node. In this session, we will explain about the Assisted Service flows and what are the network and hardware requirements, and the needed inputs from the user. We will discuss all the customizations available to the user, and about the possibility of running the Assisted Installer in a disconnected environment. Finally, we will do a demonstration showing how all come together to a running OpenShift cluster in your own backyard. Try the Assisted Installer here: https://cloud.redhat.com/openshift/assisted-installer/clusters

1. Installing OpenShift on your servers with Assisted Installer
OpenShift in your own backyard
Fred Rolland
Principal Software Engineer
@Freddy_Rolland
Nir Magnezi
Senior Software Engineer
@nirmagnezi
1
DevConf.CZ 2021

2. Value of OpenShift
2
Red Hat Enterprise Linux | RHEL CoreOS
Kubernetes
Automated Operations
Cluster Services
Monitoring, Logging,
Registry, Router, Telemetry
Developer Services
Dev Tools, CI/CD,
Automated Builds, IDE
Application Services
Service Mesh, Serverless,
Middleware/Runtimes, ISVs
What is OpenShift

3. 3
Installation Options
Bare Metal
CodeReady
Containers

4. 4
Bare Metal Installation

5. 5
Assisted Installer: Make It Simple
Requirements
▸ Minimum 3 servers
▸ Ability to boot servers from ISO
▸ Access to the internet (or via proxy)
▸ DHCP / NTP
▸ No need for additional bootstrap server

6. ▸ Download the “Discovery ISO”
▸ Build your cluster inventory
▸ Preflights validations
▸ Guided configuration and resource assignment
▸ Cluster deployment and configuration
6
High Level Flow

7. 7
Demo

8. 8
▸ Cloud
▸ Self-Hosted
▸ On-Premises
Architecture

9. 9
Architecture - Cloud
Assisted
Installer
REST API
Assisted
Installer
UI
Accounts
Manager
Service
Amazon S3
Bucket
Amazon RDS
PostgreSQL
DB
On-premise environment
User
Servers
cloud.redhat.com
Agent

10. 10
Architecture - Cloud

11. 11
Architecture - Self Hosted
Assisted
Installer
REST API
Assisted
Installer
UI
On-premise environment
User
Servers
Agent

12. 12
Architecture - On Premises
On-premise environment
User
Servers
Assisted
Installer
REST API
Assisted
Installer
UI
Linux Container

13. 13
Agent Based Installation
▸ Call Home
▸ Pull vs Push
▸ Pre-Flight Validations
▸ Telemetry / Insights

14. ▸ Disconnected environment
▸ Day 2 operation - Add Worker
Node
14
▸ Customizations:
･ Discovery Ignition
･ Pointer Ignition
･ Install Config
･ Installer Parameters
･ Manifests
Advanced Operations

15. 15
▸ IPv6
▸ Static IP Addresses
▸ Cluster Profiles
▸ Multiple Openshift Versions
▸ Install Additional Operators (LSO, OCS, OpenShift Virtualization)
▸ Single Node OpenShift
▸ Kubernetes Native API (CRD based)
▸ Improve Installation Status Report and Troubleshooting Guidance
Future Roadmap

16. 16
▸ https://cloud.redhat.com/openshift/assisted-installer/clusters
▸ https://github.com/openshift/assisted-service
▸ https://github.com/openshift/assisted-installer
▸ https://github.com/openshift/assisted-installer-agent
▸ https://github.com/openshift/assisted-test-infra
▸ https://learn.openshift.com
▸ CRC talk - DevCon CZ 2020
Useful Links

17. 17
Q&A

18. 18
Thank you
@Freddy_Rolland
www.linkedin.com/in/rollandf
rollandf
@nirmagnezi
www.linkedin.com/in/nirmagnezi
nmagnezi
DevConf.CZ 2021