From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CB9B9CC6B34 for ; Thu, 15 Oct 2026 07:18:40 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1xHFj1-0001UH-PC; Thu, 15 Oct 2026 03:18:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1xHFie-0001Tr-9D for qemu-devel@nongnu.org; Thu, 15 Oct 2026 03:17:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1xHFia-0001RE-A3 for qemu-devel@nongnu.org; Thu, 15 Oct 2026 03:17:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1792048654; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aWcwU7ghXwqpV4s637PgKen4najmWKgsN+j0T5g+eZE=; b=fOkVwUzDDwk4hlqwWWgNGgw+WD/ivfu72ixeE2ZN/5IAFf3GF6ADyws281yoyPhckUwUCc DAPPGZqGmU2QKI1kMjAzSXiJuq8NVqM1oojQ/yXhEycK8AbQp/n3e/xRvMdVEE6UKn/V6B rLvu7rPL+y/SqNUgOU2yDb/ZVadjan0= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-65-whC83AXGMViDnPsYOr-_4w-1; Thu, 15 Oct 2026 07:17:30 +0000 X-MC-Unique: whC83AXGMViDnPsYOr-_4w-1 X-Mimecast-MFC-AGG-ID: whC83AXGMViDnPsYOr-_4w_1792048649 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 530371956055; Thu, 15 Oct 2026 07:17:29 +0000 (UTC) Received: from redhat.com (headnet04.pony-001.prod.iad2.dc.redhat.com [10.2.32.116]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A036F1956089; Thu, 15 Oct 2026 07:17:26 +0000 (UTC) Date: Thu, 15 Oct 2026 08:17:23 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Fabiano Rosas Cc: qemu-devel@nongnu.org, peterx@redhat.com, mjt@tls.msk.ru Subject: Re: [RFC] container images for migration-test Message-ID: References: <8733vbtmge.fsf@suse.de> <87jynkmaht.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <87jynkmaht.fsf@suse.de> User-Agent: Mutt/2.4.2 (2026-08-30) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 10 X-Spam_score: 1.0 X-Spam_bar: + X-Spam_report: (1.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.24, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Wed, Oct 14, 2026 at 02:56:46PM -0300, Fabiano Rosas wrote: > Daniel P. Berrangé writes: > > > On Mon, Sep 14, 2026 at 08:58:09PM -0300, Fabiano Rosas wrote: > >> Hi, I just wanted to share and ask for feedback on some container images > >> I've been building as part of my testing of migration pull-requests. > >> > >> From a Dockerfile from ./tests/docker/dockerfiles/ I'm producing the > >> following: > >> > >> $ docker images > >> qemu-build-base:11.0.0 b6efa198e93a 5.8GB > >> qemu-rootfs-base:11.0.0 72bcb5418f4d 4.08GB > >> qemu:11.0.0 018a3f0f4dcc 2GB > > > > snip > > > >> 2) Neither the QEMU build nor the distro repos are reliable enough to > >> allow me to just "go back in time" and rebuild at any moment, I need to > >> keep the artifacts cached to avoid rebuilding. Otherwise it comes time > >> to send a PR and I discover that some python piece has changed or the > >> distro messed up the older repository. > > > > Yes, in general building old QEMU on new distros periodically > > hits trouble. If building old QEMU, better reliability is > > achieved by using a distro release that was from the same > > timeframe as QEMU. Is using containers targetting such old > > distro versions not an option ? The tests/docker/dockerfiles > > from the old QEMU branch ought to work ? > > > > Yes, I'm doing just that. Some tweaks are needed still. For instance, my > script has something like this: > > dockerfile="tests/docker/dockerfiles/opensuse-leap.docker" > > sed -i 's/ncurses-devel//' $dockerfile > > if [ "$tag" = "10.1.0" ]; then > sed -i 's/libLLVM19//' $dockerfile > fi If that's needed, shouldn't we patch the QEMU stable branch ? I would have thought that would be a problem for doing releases on stable if the containers have bugs ? > > How far back in time do you need/want to go for migration > > testing ? Is it sufficient to merely target versions for > > which mjt is still doing active maint work, so we can > > expect the containers to still work. > > > > I'm currently testing against the previous 3 releases. I think 2 > releases is probably enough. I guess if we test X -> Y and then later test Y -> Z, then we have transitively validated X -> Z. So in theory only 1 historical release is enough, but it makes sense to test one or two more variants just in case. With regards, Daniel -- |: https://berrange.com ~~ https://hachyderm.io/@berrange :| |: https://libvirt.org ~~ https://entangle-photo.org :| |: https://pixelfed.art/berrange ~~ https://fstop138.berrange.com :|