From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 06794921D6 for ; Thu, 1 Feb 2024 10:20:56 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id D9CAEC2D9 for ; Thu, 1 Feb 2024 10:20:55 +0100 (CET) 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 for ; Thu, 1 Feb 2024 10:20:55 +0100 (CET) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id E50FC41C11 for ; Thu, 1 Feb 2024 10:20:54 +0100 (CET) Message-ID: <9dc55104-f106-4602-9100-7eeac227caa7@proxmox.com> Date: Thu, 1 Feb 2024 10:20:53 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: Proxmox VE development discussion , Friedrich Weber References: <20240118111147.131727-1-f.weber@proxmox.com> <4f959cf9-5068-4c14-aaf6-885f9cbf982a@proxmox.com> <74530bb6-6ccc-4b6e-ae3e-c1411fd7f4d7@proxmox.com> From: Fiona Ebner In-Reply-To: <74530bb6-6ccc-4b6e-ae3e-c1411fd7f4d7@proxmox.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.073 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy 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 T_SCC_BODY_TEXT_LINE -0.01 - URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [proxmox.com] Subject: Re: [pve-devel] [PATCH v2 storage] lvm: improve warning in case vgs output contains unexpected lines X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Feb 2024 09:20:56 -0000 Am 31.01.24 um 12:55 schrieb Friedrich Weber: > > After changing `warn` to `log_warn` I noticed that pvestatd does not > write the warning to the syslog every 10s anymore. Turns out `warn` > triggers a custom __WARN__ handler we install for our daemons which also > writes to syslog (e.g. pvestatd [1]). But `log_warn` only writes to > stderr [2], thus the `log_warn` warning is not written to the syslog. > > Briefly discussed with Fiona off-list, she suggested to try replacing > `print` in `log_warn` with `warn` [2]. But with this, all `log_warn` > warnings also appear in the syslog (e.g. the "no efidisk configured" > warning [3]), which I think would be too spammy. > But that is the original intention behind the __WARN__ handler. I'd argue that replacing a warn with a log_warn() shouldn't change these semantics. The intention of log_warn() was to make warnings more visible in task logs. Making them less visible outside of tasks was not intended! The issue that task warnings also appear in syslog for pvedaemon and others is a bit orthogonal and can be fixed too. My proposed solutions: 1) Switch to using "warn" instead of "print STDERR" in log_warn() and either: 1A) Clear the inherited __WARN__ handler in fork_worker(). 1B) Have the __WARN__ handler check if it's in a worker and only log to syslog if it's not. 2. Keep using "print STDERR" in log_warn() and do print to syslog there if not in a worker. > I'd suggest I use `log_warn` in this patch and keep `log_warn` as it is > (printing only to stderr) for now. The downside is that pvestatd will > not log the `vgs` warning to the syslog anymore (but doing that every 10 > seconds could also be considered spammy anyway). The upside is that e.g. > a qmstart task log has the warning in its task log and shows "Warnings: > 1" in the GUI, which might be better for visibility than a syslog > message anyway. > This is something that could be solved with an intermediate log level, but that requires new infrastructure of course. If it important enough to be a warning, then I don't see an issue with pvestatd logging it. If it's not, maybe we need a log_info() for such messages (and allow users to configure if they want infos too)? > What do you think? > > [1] > https://git.proxmox.com/?p=pve-manager.git;a=blob;f=bin/pvestatd;h=5cd727e9;hb=d90563e4#l15 > [2] > https://git.proxmox.com/?p=pve-common.git;a=blob;f=src/PVE/RESTEnvironment.pm;h=191c6eb;hb=c6ec71d84#l735 > [3] > https://git.proxmox.com/?p=qemu-server.git;a=blob;f=PVE/QemuServer.pm;h=b45507aa;hb=eb86f776#l3492 > >