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From: Fiona Ebner <f.ebner@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH docs 19/19] qm: machine version: document support in PVE
Date: Fri,  3 Jan 2025 16:58:02 +0100	[thread overview]
Message-ID: <20250103155802.143669-20-f.ebner@proxmox.com> (raw)
In-Reply-To: <20250103155802.143669-1-f.ebner@proxmox.com>

Elaborate on new QEMU machine version removal policy and how PVE will
support machine versions. Make sure to also mention the years, so that
users immediately have a good idea for how long it will be.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
 qm.adoc | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/qm.adoc b/qm.adoc
index 94fdd4e..695013c 100644
--- a/qm.adoc
+++ b/qm.adoc
@@ -173,6 +173,32 @@ This means that after a fresh start, the newest machine version supported by the
 QEMU binary is used (e.g. the newest machine version QEMU 8.1 supports is
 version 8.1 for each machine type).
 
+Starting with QEMU 10.1, machine versions will be removed from upstream QEMU
+after 6 years. In {pve}, major releases happen approximately every 2 years, so a
+major {pve} release will support machine versions from approximately two
+previous major {pve} releases, more details below.
+
+There will be an early informational message if a machine version is used that
+is going to be dropped at some point during the next major {pve} release life
+cycle. Before upgrading to a new major {pve} release, you should update all
+those machine versions to ensure that the guests can still be used throughout
+that release.
+
+The following table shows the expected baselines of supported machine versions
+for the current and upcoming major {pve} releases (best guesses):
+
+[width="100%",cols=">s,>,>s,2*>",options="header"]
+|===============================================================================================
+| {pve} | active development | supported baseline | dropped during life cycle | last QEMU binary
+|     8 |          2023-2025 |                2.4 |             2.3 and older |              9.2
+|     9 |          2025-2027 |                6.0 |             5.2 and older |             11.2
+|    10 |          2027-2029 |                8.0 |             7.2 and older |             13.2
+|===============================================================================================
+
+NOTE: Support for {pve} releases is longer than active development, but no new
+QEMU binary versions will be added after active development, just backports and
+fixes for existing binary versions.
+
 [[qm_machine_update]]
 
 Update to a Newer Machine Version
-- 
2.39.5



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  parent reply	other threads:[~2025-01-03 15:59 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-01-03 15:57 [pve-devel] [PATCH qemu/qemu-server/docs 00/19] adapt to changes in QEMU machine version deprecation/removal Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu 01/19] weaken machine version deprecation warning Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 02/19] machine: drop unused parameter from assert_valid_machine_property() helper Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 03/19] move get_command_for_arch() helper to helpers module Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 04/19] helpers: improve name for variable for mapping arch to binary Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 05/19] move kvm_user_version() function to helpers module Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 06/19] move get_vm_arch() helper " Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 07/19] machine: add default_machine_for_arch() helper Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 08/19] move get_installed_machine_version() helper to machine module Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 09/19] move windows_get_pinned_machine_version() function " Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 10/19] move get_vm_machine() " Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 11/19] move meta information handling to its own module Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 12/19] machine: get vm machine: fallback to creation QEMU version for windows starting with 9.1 Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 13/19] machine: add check_and_pin_machine_string() helper Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [RFC qemu-server 14/19] api: update vm config: pin machine version when switching to windows os type Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 15/19] machine: log informational line when pinning machine version for Windows guest Fiona Ebner
2025-01-03 15:57 ` [pve-devel] [PATCH qemu-server 16/19] machine: rename machine_version() function to machine_version_at_least() Fiona Ebner
2025-01-03 15:58 ` [pve-devel] [PATCH qemu-server 17/19] machine: adapt to changes in QEMU machine version deprecation/removal Fiona Ebner
2025-01-03 15:58 ` [pve-devel] [PATCH qemu-server 18/19] machine: code cleanup: avoid superfluous augmented assignment operator Fiona Ebner
2025-01-03 15:58 ` Fiona Ebner [this message]
2025-01-04  7:58 ` [pve-devel] [PATCH qemu/qemu-server/docs 00/19] adapt to changes in QEMU machine version deprecation/removal Dietmar Maurer
2025-01-04  8:00   ` Dietmar Maurer

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