Dotaz: mount.aufs pri bootu nefunguje, po startu ano.

[Zdeněk Štěpánek]

Zdravim

V jednom ze startovacich skruiptu ArchLinuxu mam tento prikaz:

mount -t aufs -o br=/aufs-data/$IP/var/:/var/ none /var/

S tou promennou by snad problem byt nemel, kdyz na ten prikaz pouziju echo "mount ..."; tak se v poradku promenna expanduje na 192-168-1-11, dotycny adresar existuje.

Skonci to chybou "mount: wrong fs type, bad option, bad superblock on none". Vice v prilozenem vystupu strace.

Pokud tentyz prikaz (bez promenne samozrejme) spustim, po nabootovani (o par nevinnych skriptu pozdeji), tak to normalne funguje. Chybu "file 2 is not in sorted order" to hlasi vzdy, zrejme to neni zadny problem.

Vypis strace:

execve("/bin/mount", ["mount", "-t", "aufs", "-o", "br=/aufs-data/192-168-3-7/var/:/"..., "none", "/var/"], [/* 21 vars */]) = 0
brk(0)                                  = 0x85b8000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=142610, ...}) = 0
mmap2(NULL, 142610, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7ec5000
close(4)                                = 0
open("/lib/libblkid.so.1", O_RDONLY)    = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`\"\0\0004\0\0\0\224"..., 512) = 512
fstat64(4, {st_mode=S_IFREG|0755, st_size=47442, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ec4000
mmap2(NULL, 39832, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0xb7eba000
mmap2(0xb7ec3000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x9) = 0xb7ec3000
close(4)                                = 0
open("/lib/libuuid.so.1", O_RDONLY)     = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340\17\0\0004\0\0\0\0"..., 512) = 512
fstat64(4, {st_mode=S_IFREG|0755, st_size=17007, ...}) = 0
mmap2(NULL, 15624, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0xb7eb6000
mmap2(0xb7eb9000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x2) = 0xb7eb9000
close(4)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 h\1\0004\0\0\0\200"..., 512) = 512
fstat64(4, {st_mode=S_IFREG|0755, st_size=1554407, ...}) = 0
mmap2(NULL, 1336912, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0xb7d6f000
mprotect(0xb7eaf000, 4096, PROT_NONE)   = 0
mmap2(0xb7eb0000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x140) = 0xb7eb0000
mmap2(0xb7eb3000, 9808, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7eb3000
close(4)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7d6e000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7d6e700, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xb7eb0000, 8192, PROT_READ)   = 0
mprotect(0xb7f05000, 4096, PROT_READ)   = 0
munmap(0xb7ec5000, 142610)              = 0
brk(0)                                  = 0x85b8000
brk(0x85d9000)                          = 0x85d9000
umask(022)                              = 022
open("/dev/null", O_RDWR|O_LARGEFILE)   = 4
close(4)                                = 0
getuid32()                              = 0
geteuid32()                             = 0
stat64("/sbin/mount.aufs", {st_mode=S_IFREG|0755, st_size=4617, ...}) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb7d6e748) = 3208
wait4(-1, comm: file 2 is not in sorted order
mount: wrong fs type, bad option, bad superblock on none,
       missing codepage or helper program, or other error
       (for several filesystems (e.g. nfs, cifs) you might
       need a /sbin/mount.<type >helper program)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

[{WIFEXITED(s) && WEXITSTATUS(s) == 32}], 0, NULL) = 3208
--- SIGCHLD (Child exited) @ 0 (0) ---
exit_group(32)                          = ?

Nevite nekdo co se tomu nelibi?

Zdeněk

Odpovědi

[Zdeněk Štěpánek]

Jak uz to tak byva, problem se vyresil nikoli po nekolika dnech zkoumani a zkouseni, ale okamzik po polozeni dotazu.

Ten mount potrebuje zapisovat do /tmp, takze jeste pred tim mountem potrebuju mit pristupny /tmp a ne az potom, jak jsme to puvodne ve skriptu mel. Takze cele reseni je tady:

#!/bin/bash

swapdsk=`fdisk -l | grep -m 1 "Linux swap" | cut -d " " -f 1`
if [ ! $swapdsk == "" ]; then
echo "Activating swap $swapdsk"
/sbin/swapon -v -p 5 $swapdsk
fi

IP=`ip a s eth0 | grep -m 1 "inet " | cut -d " " -f 6 | cut -d / -f 1 | sed 's/\./-/g'`
hostname $IP

mount -t tmpfs none /tmp
chmod 777 /tmp/

mkdir -p /aufs-data/$IP/var/

mount -t aufs -o br=/aufs-data/$IP/var/:/var/ none /var/

Zdenek