Gentoo Archives: gentoo-user

From: "Jörg Schaible" <joerg.schaible@×××.de>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Re: Bind stole my /
Date: Mon, 09 Nov 2015 22:46:52
Message-Id: n1r7o5$dgs$1@ger.gmane.org
In Reply to: Re: [gentoo-user] Bind stole my / by Jarry
1 Hi Jarry,
2
3 Jarry wrote:
4
5 > On 08-Nov-15 17:58, Mike Gilbert wrote:
6 >> On Fri, Nov 6, 2015 at 12:19 PM, Jarry <mr.jarry@×××××.com> wrote:
7 >>> Hi Gentoo-users,
8 >>>
9 >>> I noted one strange thing today: It seems one of my servers lost "/"!
10 >>>
11 >>> vs5-dns ~ # df
12 >>> Filesystem 1K-blocks Used Available Use% Mounted on
13 >>> /var/log/named 10138552 2223148 7377344 24% /chroot/dns/var/log/named
14 >>> tmpfs 308196 420 307776 1% /run
15 >>> dev 10240 0 10240 0% /dev
16 >>> shm 1540968 0 1540968 0% /dev/shm
17 >>> cgroup_root 10240 0 10240 0% /sys/fs/cgroup
18 >>> none 1048576 0 1048576 0% /var/tmp/portage
19 >>
20 >> Is your /etc/mtab a regular file, or is it a symlink to
21 >> /proc/self/mounts? The latter is recommended.
22 >
23 > It is regular file. I never changed it...
24 >
25 > vs5-dns ~ # ls -l /etc/mtab
26 > -rw-r--r-- 1 root root 908 Nov 9 19:14 /etc/mtab
27 >
28 >> Anyway, please have a look at the contents of /etc/mtab,
29 >> /proc/self/mounts, and proc/self/mountinfo while named is running and
30 >> when it is stopped. If you pastebin them we can take a look for key
31 >> differences.
32 >
33 > With bind running:
34 > http://pastebin.com/wkTW6xAY
35 >
36 > without bind:
37 > http://pastebin.com/JG5FPNDW
38 >
39 > While I can see some differences there, I still do not understand
40 > why is "/" missing in "df" output. BTW I can not proove it, but this
41 > was not the case all the time. At least when I was tuning monitoring
42 > software, I'm pretty sure "/" was there...
43
44 Actually I have the same problem, but I do not run named. /etc/mtab is a
45 regular file on my system, too (since years). I am actually missing two
46 entries:
47
48 /
49 /var/share/storage
50
51 Compare with contents of mtab. Both entries were originally there.
52
53 Do you have also nfs exports?
54
55 =========================== %< =============================
56 joehni@bobbel ~ $ df -hl
57 Filesystem Size Used Avail Use% Mounted on
58 udev 10M 0 10M 0% /dev
59 /var/spool/cups-pdf 892G 261G 586G 31% /export/cups-pdf
60 tmpfs 396M 572K 395M 1% /run
61 none 2.0G 0 2.0G 0% /dev/shm
62 cgroup_root 10M 0 10M 0% /sys/fs/cgroup
63 /dev/sda6 926M 269M 594M 32% /var/log
64 /var/share/storage/Video/Film 3.6T 2.3T 1.2T 65%
65 /export/storage/Video/Film
66 joehni@bobbel ~ $ cat /etc/mtab
67 proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
68 udev /dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=505255,mode=755
69 0 0
70 devpts /dev/pts devpts rw,relatime,gid=5,mode=620 0 0
71 sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
72 /dev/sda5 / ext4 rw,relatime,data=ordered 0 0
73 tmpfs /run tmpfs rw,nodev,relatime,size=404508k,mode=755 0 0
74 mqueue /dev/mqueue mqueue rw,nosuid,nodev,noexec,relatime 0 0
75 none /dev/shm tmpfs rw,nosuid,nodev,noexec,relatime,size=2097152k 0 0
76 cgroup_root /sys/fs/cgroup tmpfs
77 rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755 0 0
78 fusectl /sys/fs/fuse/connections fusectl rw,nosuid,nodev,noexec,relatime 0 0
79 openrc /sys/fs/cgroup/openrc cgroup
80 rw,nosuid,nodev,noexec,relatime,release_agent=/lib64/rc/sh/cgroup-release-
81 agent.sh,name=openrc 0 0
82 cpuset /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0
83 0
84 cpu /sys/fs/cgroup/cpu cgroup rw,nosuid,nodev,noexec,relatime,cpu 0 0
85 cpuacct /sys/fs/cgroup/cpuacct cgroup
86 rw,nosuid,nodev,noexec,relatime,cpuacct 0 0
87 blkio /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
88 memory /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0
89 0
90 devices /sys/fs/cgroup/devices cgroup
91 rw,nosuid,nodev,noexec,relatime,devices 0 0
92 freezer /sys/fs/cgroup/freezer cgroup
93 rw,nosuid,nodev,noexec,relatime,freezer 0 0
94 net_cls /sys/fs/cgroup/net_cls cgroup
95 rw,nosuid,nodev,noexec,relatime,net_cls 0 0
96 perf_event /sys/fs/cgroup/perf_event cgroup
97 rw,nosuid,nodev,noexec,relatime,perf_event 0 0
98 net_prio /sys/fs/cgroup/net_prio cgroup
99 rw,nosuid,nodev,noexec,relatime,net_prio 0 0
100 debug /sys/fs/cgroup/debug cgroup rw,nosuid,nodev,noexec,relatime,debug 0 0
101 /dev/sda6 /var/log ext4 rw 0 2
102 /dev/sdb1 /var/share/storage/Video/Film ext4 rw 0 2
103 /var/db/portage /export/portage none rw,bind 0 0
104 /var/share/storage /export/storage none rw,bind 0 0
105 /var/spool/cups-pdf /export/cups-pdf none rw,bind 0 0
106 /var/share/storage/Video/Film /export/storage/Video/Film none rw,bind 0 0
107 binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nodev,noexec,nosuid 0 0
108 rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
109 nfsd /proc/fs/nfsd nfsd rw,nodev,noexec,nosuid 0 0
110 =========================== %< =============================