CentOS Linux 8 a atteint le stade de "fin de vie" (EOL) le 31 décembre dernier. Depuis le 1er janvier 2022, CentOS Stream est donc devenu uniquement une branche de développement de Red Hat. Quelles sont les conséquences pratiques de ce changement annoncé quelques mois auparavant ? Quelles différences entre Red Hat / CentOS et SUSE / openSUSE ? Quelles solutions s’offrent à vous pour préserver la stabilité de votre infrastructure Linux ?

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The CentOS Case
23 M ARS 2022
An Opensource Thriller (suite)
Brice Dekany
brice.dekany@suse.com
Sales
Engineers
Benoit Loriot
benoit.loriot@suse.com
Julien Niedergang
julien.niedergang@suse.com

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Prochains webinars
Date Heure Sujet
Jeudi 31 Mars 9h30 - 12h00 Rancher Rodeo with our partner: Metanext
Vendredi 1er Avril 9h30 - 10h30 Code Factory
Vendredi 13 Mai 9h30 - 12h00 Rancher Rodeo #8
Mardi 17 Mai 9h30 - 12h00 Rancher Rodeo with our partner: Inetum

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Agenda
3
1. What is a Linux distribution ?
2. What happened ?
3. Lifecycles
– CentOS and Red Hat
– openSUSE and SUSE
4. SUSE Solution
– Free stable platform: openSUSE Leap
– Stuck with CentOS: Liberty Linux
– Heterogeneous Linux environments: SUSE Manager
5. Let’s summarize

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Copyright © SUSE 2021
What is a Linux
distribution
4

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Distribution
14000+ packages
1000+ communities
Build &
Lifecycle
5
Building a Linux Distribution

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Calling Support Solution
"Problemtemporary fix"
(PTF)
Solution added
to community'sBugzilla
Community
Maintenance: selecting patches&fixes
Enhanced and fixed code
Official updates
Customers or any enterprise
support desk
Distribution Maintenance and Support Protocol
6

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Copyright © SUSE 2021
What happened ?
7

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…2020, 2021… Starting January the 1st, 2022
8
Red Hat killed CentOS ?
The free CentOS Linux won't be a clone of RHEL anymore, starting CY2022.
Red Hat is not "killing" CentOS, it is totally changing its approach.
Long Term Support (LTS)
Distribution
Based on
a LTS Distribution
Tech-preview Distribution Tech-preview Distribution
Based on rolling updates
Focused for Developers & Testing
Long Term Support (LTS)
Distribution
Stream

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The media is strongly reacting.

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Customers / Partners are strongly reacting.
Stable code
not guaranteed
anymore
Subject to
constant
changes
Complex
Certifications
Poor new
Lifecycle

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Copyright © SUSE 2021
Lifecycles
11

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RHEL
7.0
RHEL
7.1
CentOS Stream (rolling updates)
Fedora Distribution (RHEL tech-preview)
CentOS
7.0
CentOS
7.1
RHEL
8.2
= Branch
CentOS
8.2
RHEL
8.3
CentOS
8.3
RHEL
8.4
Releases
CentOS
8.4
CentOS Stream
is not based on a
stable release
Based on a known
stable release
Based on a known
stable release
Based on a known
stable release
Based on a known
stable release
CentOS Linux
disappears
RHEL = Red Hat Enterprise Linux
CentOS & Red Hat origins

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Tumbleweed (rolling-release)
Leap
15
SLE
15
Core
15
openSUSE Build Factory (CI/CD)
Leap
15.1
SLE
15 SP1
Core
15.1
Based on a known
stable release
= Branch
Releases
Based on a known
stable release
SLE = SUSE Linux Enterprise
…
Leap
15.2
SLE
15 SP2
Core
15.2
Based on a known
stable release
Leap
42
SLE
12
Core
12
Based on a known
stable release
Leap
42.1
SLE
12 SP1
Core
12.1
Based on a known
stable release
Leap
42.2
SLE
12 SP2
Core
12.2
Based on a known
stable release
openSUSE & SUSE origins

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Copyright © SUSE 2021
SUSE Solutions
14

15. Copyright © SUSE 2021
Hosted on git.centos.org
Source code and
patches
from different
Contributors, ISV/IHV…
Code
packaged by
RH
.src.rpm .src.rpm
.rpm
+ specfile
Source Code.c
tar.gz
Code is modified by
CentOS
(closed since 31 dec 21!)
COMPILATION
CentOS 8.1
.rpm
RHEL 8.1
15
COMPILATION
Patching using Liberty 8.1 is possible
.rpm
Liberty 8.1
by
Keep CentOS Linux: Liberty Linux
Short Term Transitioning Solution

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openSUSE Leap
SLE 15
Minor version every 12 months
Major Release ~5 years support
Move to a
fully supported OS
without reinstallation
CentOS Linux
CentOS 6 - End of Life 2020
CentOS 7 - End of Life 2024
CentOS 8 - End of Life 2021
Migration Path
No Big Bang
16
Need a free and stable OS: Slow Migration
Mid/Long Term Solution

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Hypervisors
Private and
public cloud
Server
hardware
Storage
hardware
SUSE Linux
Enterprise
workload
Red Hat
Linux
workload
IOT
Ubuntu
Linux
workload
17
SUSE Manager: Heterogeneous Lifecycle
On-going Solution

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Copyright © SUSE 2021
Let’s summarize
18

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Je cherche
…une distribution
Linux gratuite stable
Scénario :
openSUSE Leap
..une solution pour
conserver mes
CentOS Linux à jour
Scénario :
Liberty Linux
…une distribution
Linux gratuite stable
hors prod et un
support pour appli
critique
Scénario :
openSUSE Leap
+ SLES
…comment faire
avec ce parc
hétérogène de Linux
(CentOS, RH, SLES,
Leap, Ubuntu, …)
Scénario :
SUSE Manager

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