From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <s.ivanov@proxmox.com> Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 69EDE722FB for <pve-devel@lists.proxmox.com>; Thu, 1 Jul 2021 11:29:38 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 597C022E7D for <pve-devel@lists.proxmox.com>; Thu, 1 Jul 2021 11:29:08 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id E03D122E74 for <pve-devel@lists.proxmox.com>; Thu, 1 Jul 2021 11:29:07 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id AD7904287F for <pve-devel@lists.proxmox.com>; Thu, 1 Jul 2021 11:29:07 +0200 (CEST) From: Stoiko Ivanov <s.ivanov@proxmox.com> To: pve-devel@lists.proxmox.com Date: Thu, 1 Jul 2021 11:28:54 +0200 Message-Id: <20210701092854.24782-1-s.ivanov@proxmox.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.557 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: [pve-devel] [PATCH docs] pct: clarify needed systemd-versions for cgroupv2 support X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion <pve-devel.lists.proxmox.com> List-Unsubscribe: <https://lists.proxmox.com/cgi-bin/mailman/options/pve-devel>, <mailto:pve-devel-request@lists.proxmox.com?subject=unsubscribe> List-Archive: <http://lists.proxmox.com/pipermail/pve-devel/> List-Post: <mailto:pve-devel@lists.proxmox.com> List-Help: <mailto:pve-devel-request@lists.proxmox.com?subject=help> List-Subscribe: <https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel>, <mailto:pve-devel-request@lists.proxmox.com?subject=subscribe> X-List-Received-Date: Thu, 01 Jul 2021 09:29:38 -0000 versions determined through systemd's changelog, and a few empiric tests. Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com> --- pct.adoc | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/pct.adoc b/pct.adoc index b03b6ba..42826bd 100644 --- a/pct.adoc +++ b/pct.adoc @@ -518,8 +518,17 @@ Another important difference is that the 'devices' controller is configured in a completely different way. Because of this, file system quotas are currently not supported in a pure 'cgroupv2' environment. -If file system quotas are not required and the containers are new enough to -understand 'cgroupv2', it is recommended to stick to the new default. +'cgroupv2' support by the container's OS is needed to run in a pure 'cgroupv2' +environment. Containers running 'systemd' version 231 or newer support +'cgroupv2' footnote:[this includes all newest major versions of container +templates shipped by {pve}], as do containers not using 'systemd' as init +system footnote:[for example Alpine Linux]. + +NOTE: CentOS 7 and Ubuntu 16.10 are two prominent Linux distributions, which +have a 'systemd' version that is too old to run in a 'cgroupv2' environment. + +If file system quotas are not required and the containers support 'cgroupv2', +it is recommended to stick to the new default. To switch back to the previous version the following kernel command line parameter can be used: -- 2.30.2