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Thu, 12 Aug 2021 20:38:38 +0800 (CST) Received: from dggema759-chm.china.huawei.com (10.1.198.201) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Thu, 12 Aug 2021 20:42:19 +0800 Received: from [10.174.177.52] (10.174.177.52) by dggema759-chm.china.huawei.com (10.1.198.201) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 12 Aug 2021 20:42:18 +0800 To: Martin Wilck , Benjamin Marzinski References: <37767722-8e6c-4176-d234-87134c21cd4c@huawei.com> <20210722214253.GC3087@octiron.msp.redhat.com> <85cb30a7-a873-b33d-4105-6e3e9675f105@huawei.com> <20210723165603.GE3087@octiron.msp.redhat.com> <02cba2a5-3fcf-bca9-d887-f8a3c0300582@huawei.com> <20210726162827.GH3087@octiron.msp.redhat.com> <65c25c39b00a37f88403d3a32dfdc154c1b8ec3b.camel@suse.com> From: lixiaokeng Message-ID: Date: Thu, 12 Aug 2021 20:42:18 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <65c25c39b00a37f88403d3a32dfdc154c1b8ec3b.camel@suse.com> X-Originating-IP: [10.174.177.52] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggema759-chm.china.huawei.com (10.1.198.201) X-CFilter-Loop: Reflected X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-MIME-Autoconverted: from quoted-printable to 8bit by lists01.pubmisc.prod.ext.phx2.redhat.com id 17CCgUGC027777 X-loop: dm-devel@redhat.com Cc: linfeilong , dm-devel mailing list , "liuzhiqiang \(I\)" Subject: Re: [dm-devel] [Question] multipathd.service start failed when /var/run isn't mount X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-GB Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable On 2021/8/12 19:09, Martin Wilck wrote: > On Mo, 2021-07-26 at 11:28 -0500, Benjamin Marzinski wrote: >> On Mon, Jul 26, 2021 at 08:22:49PM +0800, lixiaokeng wrote: >>> >>>>> After sdb mounted to /var, we can start multipathd service >>>>> successfully. >>>> >>>> But when the binaries were compiled, if /var/run existed and was >>>> a >>>> symlink in your build environment, then RUN should equal "run", >>>> and >>>> multipath should should be using /run instead of /var/run, right? >>>> >>>> This is why I asked what multipath packages are you using. >>>> >>> This problem is found in 0.7.7. >> >> Sorry. I wasn't very clear with what I was asking for.=A0 Unless I'm >> missing something here, if multipathd is trying to use /var/run, that >> means that when the multipathd binary was compiled, it was compiled >> on a >> machine where /var/run was not a symlink.=20 >> >> So, I'm wondering where your multipathd binary got compiled. Are you >> using a packaged version from a distribution like RHEL, SLES, Fedora, >> Ubuntu, etc? Did you compile it yourself? >> >> When I run multipathd under strace, I can see: >> >> openat(AT_FDCWD, "/run/multipathd.pid", O_WRONLY|O_CREAT, 0644) =3D 3 >> >> The multipathd binary I'm using was compiled on a machine where >> /var/run >> is a symlink to /run, so multipathd directly uses /run, instead of >> using >> /var/run. I'm assuming that whatever machine your multipathd binary >> was >> compiled on, /var/run was a directory. Do you know if that's >> possible? >=20 > Ack. Lixiaokeng, can you answer Ben's question? >=20 > Regards, > Martin >=20 Hi Martin, Ben: I'm sorry for missing reply. The situation is the same as ben said. The /var/run in compile machine is a directory, but it is a symlink in using machine. Thanks Ben's help again. Regards, Lixiaokeng -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel