From: "Serge E. Hallyn" <serge-A9i7LUbDfNHQT0dZR+AlfA@public•gmane.org>
To: Rui Xiang <rui.xiang-hv44wF8Li93QT0dZR+AlfA@public•gmane.org>
Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public•gmane.org,
serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public•gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
libo.chen-hv44wF8Li93QT0dZR+AlfA@public•gmane.org,
netfilter-devel-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
guz.fnst-BthXqXjhjHXQFUHtdCDX3A@public•gmane.org,
akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public•gmane.org,
"Eric W. Biederman"
<ebiederm-aS9lmoZGLiVWk0Htik3J/w@public•gmane.org>
Subject: Re: [PATCH v3 00/11] Add namespace support for syslog
Date: Wed, 14 Aug 2013 15:30:17 +0000 [thread overview]
Message-ID: <20130814153017.GA18403@mail.hallyn.com> (raw)
In-Reply-To: <52037D50.2050109-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Quoting Rui Xiang (rui.xiang-hv44wF8Li93QT0dZR+AlfA@public•gmane.org):
> On 2013/8/8 9:37, Gao feng wrote:
> > On 08/07/2013 03:55 PM, Eric W. Biederman wrote:
> >>
> >> Since this still has not been addressed. I am going to repeat Andrews
> >> objection again.
> >>
> >> Isn't there a better way to get iptables information out than to use
> >> syslog. I did not have time to follow up on that but it did appear that
> >> someone did have a better way to get the information out.
> >>
> >> Essentially the argument against this goes. The kernel logging facility
> >> is really not a particularly good tool to be using for anything other
> >> than kernel debugging information, and there appear to be no substantial
> >> uses for a separate syslog that should not be done in other ways.
> >
> > containerizing syslog is not only for iptables, it also isolates the /dev/kmsg,
> > /proc/kmsg, syslog(2)... user space tools in container may use this interface
> > to read/generate syslog.
> >
> > But I don't know how important/urgent this containerizing syslog work is,
> > Rui Xiang, can you find an important/popular user space tool which uses this
> > interfaces to generate kernel syslog?
> >
>
> There are some other cases. Some warnings (bad mount options for tmpfs,
> bad uid owner for many of them, etc) emerged in the container should
> be exported to the container. Some belong on the host - if they show
> a corrupt superblock which may indicate an attempt by the container
> to crash the kernel. Like these, Kernel will print out warnings when
> userspace in container uses a deprecated something or other, and these
> logs should be invisible and specific for current container.
>
> I can't say this work is terribly compelling and important, but the
> impact may be obvious, IMO.
Aug 9 21:49:13 sergeh1 kernel: [4644829.672768] init: Failed to spawn network-interface (veth8Ehlvj) post-stop process: unable to change root directory: No such file ricr:aeohgrticr cfe rty444984 n:aetswnw-ta(ht -rrsultheoit: hlrro<4865i:i sntkta(ht ttpe btheoit: hlrrob r6ezt)nrgoadgte644915 c0pt(tyg ti wd a
Aug 9 21:49:13 sergeh1 kernel: X3f d-6:uigitra ora
Aug 9 22:19:54 sergeh1 kernel: 6[642.175 X3f d-6:mutdflsse ihodrddt oe==99 rfl=lccnanrdfutwt-etn"nm=/a/ah/x/lu-ui/m.AExdu"pi=91 om=mut sye"x3name="/devlo0" lg=r"ol pmc r=3an19pfel-nireu-tntgne/rc/cldudmHEqu d97o=otfy=x"ra=d/o/fg""8b:o vhc)nrgibdte646013 veeMzWe oso d<[4715]xr r1eMc egset
Aug
next prev parent reply other threads:[~2013-08-14 15:30 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 7:37 [PATCH v3 00/11] Add namespace support for syslog Rui Xiang
2013-08-07 7:37 ` [PATCH v3 04/11] syslog_ns: make syslog handling per namespace Rui Xiang
[not found] ` <1375861035-24320-5-git-send-email-rui.xiang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-08-07 18:52 ` Ben Hutchings
2013-08-07 7:37 ` [PATCH v3 05/11] syslog_ns: make permisiion check per user namespace Rui Xiang
2013-08-07 18:41 ` Ben Hutchings
[not found] ` <1375861035-24320-1-git-send-email-rui.xiang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-08-07 7:37 ` [PATCH v3 01/11] syslog_ns: add syslog_namespace and put/get_syslog_ns Rui Xiang
2013-08-07 7:37 ` [PATCH v3 02/11] syslog_ns: add syslog_ns into user_namespace Rui Xiang
2013-08-07 7:37 ` [PATCH v3 03/11] syslog_ns: add init syslog_ns for global syslog Rui Xiang
2013-08-07 7:37 ` [PATCH v3 06/11] syslog_ns: use init syslog_ns for console action Rui Xiang
2013-08-07 7:37 ` [PATCH v3 07/11] syslog_ns: implement function for creating syslog ns Rui Xiang
[not found] ` <1375861035-24320-8-git-send-email-rui.xiang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-08-07 18:59 ` Ben Hutchings
2013-08-07 7:37 ` [PATCH v3 11/11] netfilter: use ns_printk in iptable context Rui Xiang
2013-08-07 9:17 ` Pablo Neira Ayuso
2013-08-07 7:55 ` [PATCH v3 00/11] Add namespace support for syslog Eric W. Biederman
2013-08-07 13:48 ` Serge Hallyn
[not found] ` <878v0evssv.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2013-08-08 1:37 ` Gao feng
[not found] ` <5202F65F.40002-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2013-08-08 11:13 ` Rui Xiang
[not found] ` <52037D50.2050109-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-08-14 15:30 ` Serge E. Hallyn [this message]
[not found] ` <20130814153017.GA18403-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2013-08-14 19:21 ` Eric W. Biederman
[not found] ` <87a9kkcc38.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2013-08-17 13:38 ` Serge E. Hallyn
2013-08-07 7:37 ` [PATCH v3 08/11] syslog_ns: implement ns_printk for specific syslog_ns Rui Xiang
2013-08-07 7:37 ` [PATCH v3 09/11] syslog_ns: implement ns_printk_emit " Rui Xiang
2013-08-07 7:37 ` [PATCH v3 10/11] syslog_ns: implement ns_console_unlock " Rui Xiang
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