From owner-freebsd-virtualization@freebsd.org Thu Aug 9 11:09:09 2018 Return-Path: Delivered-To: freebsd-virtualization@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5ABD010612A2 for ; Thu, 9 Aug 2018 11:09:09 +0000 (UTC) (envelope-from hausen@punkt.de) Received: from kagate.punkt.de (kagate.punkt.de [217.29.33.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id D99EB8CE8B for ; Thu, 9 Aug 2018 11:09:08 +0000 (UTC) (envelope-from hausen@punkt.de) Received: from hugo10.ka.punkt.de (hugo10.ka.punkt.de [217.29.44.10]) by gate1.intern.punkt.de with ESMTP id w79B91de011950 for ; Thu, 9 Aug 2018 13:09:01 +0200 (CEST) Received: from [217.29.44.49] ([217.29.44.49]) by hugo10.ka.punkt.de (8.14.2/8.14.2) with ESMTP id w79B90XJ021500 for ; Thu, 9 Aug 2018 13:09:00 +0200 (CEST) (envelope-from hausen@punkt.de) From: "Patrick M. Hausen" Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Why can't I dtrace processes running in a jail from the host? Message-Id: Date: Thu, 9 Aug 2018 13:09:00 +0200 To: freebsd-virtualization@freebsd.org X-Mailer: Apple Mail (2.3273) X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Aug 2018 11:09:09 -0000 Hi all, I'm wondering why on a busy hosting server with hundreds of PHP-FPM workers running in jails "dtrace -l" on the host does not show any PHP specific probes. PHP *is* compiled with dtrace support for all the jails. Enabling /dev/dtrace/* via devfs.rules for a specific jail and then repeating the process *inside* the jail works as expected. Shouldn't jailed processes be transparently visible from the host system but not vice versa? Thanks, Patrick -- punkt.de GmbH Internet - Dienstleistungen - Beratung Kaiserallee 13a Tel.: 0721 9109-0 Fax: -100 76133 Karlsruhe info@punkt.de http://punkt.de AG Mannheim 108285 Gf: Juergen Egeling