User talk:Wwoods/Building images with treebuilder: Difference between revisions

Revision as of 19:30, 9 August 2011

Boot problem (jreiser)

[2011-08-06 0000 UTC] Upon boot of DVD, then dracut drops to shell with the message:

 Warning: No root device "live:/dev/disk/by-label/Fedora" found.

The file is present as

 /dev/disk/by-label/Fedora 16 x86_64 DVD

with those three spaces. Reboot with quoting (single, or double, or backslash) also fails. Altering the boot parameter to

 root=ID=ata_SONY_DVD_RW_AW_G-170A

also fails [that name is in my /dev/disk/by-id].

[2011-08-06 1700 UTC] After modifying pungi so that the label of the DVD has dashes "Fedora-16-x86_64-DVD" and changing the boot command line to include the dashes "root=live:CDLABEL=Fedora-16-x86_64-DVD", then dracut still complains "No root device \"live:/dev/disk/by-label/Fedora-16-x86_64-DVD\" found". The device is there, symlinked to ../../sr0 ==> /dev/sr0, and that is the correct name of the hardware drive.

[2011-08-07 0400 UTC] In the emergency shell after dracut cannot find the root, I can find it by:

 mkdir /mnt1 /mnt2 /mnt3
 mount -o ro,loop /dev/sr0 /mnt1
 mount -o ro,loop /mnt1/images/install.img /mnt2
 mount -o ro,loop /mnt2/LiveOS/rootfs.img /mnt3

but I cannot find how to specify that in a "root=live..." that dracut understands. It's also a mystery why so many mounts are necessary.

notes/solutions (wwoods)

The DVD isn't built correctly - pungi changes the label of the image without changing the boot config file. Pungi will need to be fixed to handle that. (boot.iso should work fine.)
- I believe dracut expects spaces to be escaped, so it would need to be: root=live:CDLABEL=Fedora%x2016%x20x86_64%x20DVD
- As a workaround, you could just boot with root=live:/dev/sr0
The mounts are necessary because treebuilder images are live images, and all live images are ext4 images inside squashfs images inside an iso (CD/DVD) or vfat (USB stick) filesystem.
- Yes, that does seem needlessly complicated
- No, there isn't a simpler way to do it right now

mount traps when systemd mounts /tmp (hamzy)

Seen during booting:

... [ 11.992445] systemd[1]: tmp.mount mount process exited, code=killed status=11 [ 12.029660] systemd[1]: Job loader.service/start failed with result 'dependency'. [ 12.029695] systemd[1]: Unit tmp.mount entered failed state. ...

bash-4.2# systemctl status tmp.mount [ 71.988204] systemd[1]: Accepted connection on private bus. [ 71.988860] systemd[1]: Got D-Bus request: org.freedesktop.systemd1.Manager.LoadUnit() on /org/freedesktop/systemd1 [ 71.989077] systemd[1]: Got D-Bus request: org.freedesktop.DBus.Properties.GetAll() on /org/freedesktop/systemd1/unit/tmp_2emount tmp.mount - Runtime Directory

         Loaded: loaded (/lib/systemd/system/tmp.mount)
         Active: inactive (dead)
          Where: /tmp
           What: tmpfs
         CGroup: name=systemd:/system/tmp.mount

[ 71.990451] systemd[1]: Got D-Bus request: org.freedesktop.DBus.Local.Disconnected() on /org/freedesktop/DBus/Local

FIX:

boot with the following options

  linux systemd.log_target=kmsg systemd.log_level=debug rd.break

run the following command in the shell

  sed -i -e 's/tmp\.mount //' /sysroot/lib/systemd/system/loader.service

notes (wwoods)

Only seems to happen on PPC64 systems
This workaround has been added to the treebuilder branch; should be fixed for images built on or after Aug. 9

Slow (jreiser)

Treebuilder is slower. The first culprit looks like dracut.

number	execve
7606	/bin/egrep
2578	/bin/cp
1633	/lib64/ld-linux-x86-64.so.2
1434	/usr/bin/ldd
1413	/bin/ln
1303	/usr/local/bin/ln
1303	/usr/bin/ln
1087	/sbin/modinfo

The second culprit is not honoring $TMPDIR, and not putting yumroot-$PID and installroot-$PID inside it.

count	filename
1693845	*
253387	$DESTDIR/yumroot/...
79977	$DESTDIR/installroot/...
44486	/etc/xattr.conf
41713	/proc/self/task/31818/attr/fscreate
25919	/proc/self/task/1070/attr/fscreate
20220	/usr
19487	/etc/localtime
18485	/lib64/libc.so.6
18294	/usr/share
18184	/etc/ld.so.cache
18074	/etc/ld.so.preload
17213	/usr/bin/ldd
14471	/bin/egrep
9861	/usr/share/locale
9090	/var/log/dracut.log
9013	/dev/null
7529	/sbin/modprobe
6110	.

commentary (wwoods)

This is pretty useless without some hard numbers. On my years-old test systems, I can complete a run in the following times:

Build type	Arch	Time
treebuilder	x86_64	19:15
treebuilder (bcj=off)	x86_64	15:07
treebuilder	ppc64	40:10

speedups

bcj=off: Add this to /etc/lorax/lorax.conf

[compression]
bcj=off

The anaconda installer starts but then hangs (hamzy)

boot the 08/04/2011 iso image with the following options

  linux systemd.log_target=kmsg systemd.log_level=debug rd.break

run the following command in the shell

  sed -i -e 's/tmp\.mount //' /sysroot/lib/systemd/system/loader.service
  exit

You will see and then nothing else

  Starting Anaconda version 16.14.

Change the file /lib/systemd/system/loader.service to start the loader like this

  ExecStart=/usr/bin/strace -f -e write=3,4,5 /sbin/loader

This will run strace on the loader and produce the following output

[pid   606] <... read resumed> "", 4096) = 0
[pid   606] --- {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=910, si_status=0, si_utime=0, si_stime=1} (Child exited) ---
[pid   606] read(11, "", 4096)          = 0
[pid   606] waitpid(910, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0) = 910
[pid   606] close(9)                    = 0
[pid   606] close(11)                   = 0
[pid   606] access("/mnt/install/source/.treeinfo", R_OK) = -1 ENOENT (No such file or directory)
[pid   606] umount("/mnt/install/source", 0) = 0
[pid   606] time(NULL)                  = 1312818684
[pid   606] send(6, "<143>Aug  8 15:51:24 loader: in "..., 62, MSG_NOSIGNAL) = 62
[pid   606] write(4, "15:51:24,021 DEBUG loader: in do"..., 61) = 61
 | 00000  31 35 3a 35 31 3a 32 34  2c 30 32 31 20 44 45 42  15:51:24 ,021 DEB |
 | 00010  55 47 20 6c 6f 61 64 65  72 3a 20 69 6e 20 64 6f  UG loade r: in do |
 | 00020  4c 6f 61 64 65 72 4d 61  69 6e 2c 20 73 74 65 70  LoaderMa in, step |
 | 00030  20 3d 20 53 54 45 50 5f  4c 41 4e 47 0a            = STEP_ LANG.    |
[pid   606] select(3, [2], NULL, NULL, {0, 0}) = 0 (Timeout)
[pid   606] write(1, "\33[2;21H\33[m\17\33[30m\33[47m\342\224\214\342\224\200\342\224\200\342\224"..., 1926) = 1926
[pid   606] select(1, [0], [], [], NULL

The loader gets as far as outputting the following statement

  15:06:02,581 DEBUG loader: in doLoaderMain, step = STEP_LANG.

However, I think that there is still unbuffered strace output that did not make it to the screen.

$HOME? (jreiser)

During install from boot.iso DVD, then /mnt/sysimage has a "home/<<me>>" directory which contains a copy of my user $HOME at the time I ran pungi, even though I ran pungi within "su; cd" which set $CWD to /root.

SQUASHFS errors (hamzy)

boot the 08/04/2011 iso image with the following options

  linux systemd.log_target=kmsg systemd.log_level=debug rd.break

When you are in the shell, you will see the following errors:

switch_root:/# grep -r 'Starting Anaconda' / 2>/dev/null
[  112.508993] SQUASHFS error: xz_dec_run error, data probably corrupt
[  112.509009] SQUASHFS error: squashfs_read_data failed to read block 0x6e32d5a
[  112.509021] SQUASHFS error: Unable to read data cache entry [6e32d5a]
[  112.509028] SQUASHFS error: Unable to read page, block 6e32d5a, size 8ec4
[  112.509146] SQUASHFS error: Unable to read data cache entry [6e32d5a]
[  112.509152] SQUASHFS error: Unable to read page, block 6e32d5a, size 8ec4
[  112.541370] SQUASHFS error: Unable to read data cache entry [6e32d5a]
[  112.541379] SQUASHFS error: Unable to read page, block 6e32d5a, size 8ec4
[  112.541506] SQUASHFS error: Unable to read data cache entry [6e32d5a]
[  112.541512] SQUASHFS error: Unable to read page, block 6e32d5a, size 8ec4

or

bash-4.2# nslookup hamzy2.austin.ibm.com
[ 3082.076565] SQUASHFS error: xz_dec_run error, data probably corrupt
[ 3082.076587] SQUASHFS error: squashfs_read_data failed to read block 0x6e32d5a
[ 3082.076597] SQUASHFS error: Unable to read data cache entry [6e32d5a]
[ 3082.076604] SQUASHFS error: Unable to read page, block 6e32d5a, size 8ec4
Bus error

It seems that one of the blocks is corrupt?

missing files for networking (hamzy)

boot the 08/04/2011 iso image with the following options

  linux systemd.log_target=kmsg systemd.log_level=debug rd.break

When trying to bring up the networking, I noticed the following missing files:

bash-4.2# ifup eth0
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/sysconfig/network-scripts/ifup-ipv6: line 91: /sbin/sysctl: No such file or directory
/etc/sysconfig/network-scripts/ifup-ipv6: line 115: [: -ne: unary operator expected
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory

/bin/mountpoint and /sbin/sysctl are missing from the image.

networking does not work (hamzy)

boot the 08/04/2011 iso image with the following options

  linux systemd.log_target=kmsg systemd.log_level=debug rd.break

I am in the shell, I set up the networking by the following commands:

bash-4.2# cat << __EOF__ > /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
BOOTPROTO="static"
DNS1="9.10.244.100"
GATEWAY="9.5.250.1"
HWADDR="2A:0F:4A:82:98:04"
ONBOOT="yes"
IPADDR="9.5.250.146"
IPV6INIT="yes"
NETMASK="255.255.255.0"
NM_CONTROLLED="yes"
TYPE="Ethernet"
__EOF__
bash-4.2# cat << __EOF__ > /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=bluebill
__EOF__
bash-4.2# ifup eth0

I then saw the following errors:

bash-4.2# ifup eth0
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/sysconfig/network-scripts/ifup-ipv6: line 91: /sbin/sysctl: No such file or directory
/etc/sysconfig/network-scripts/ifup-ipv6: line 115: [: -ne: unary operator expected
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory
/etc/init.d/functions: line 17: /bin/mountpoint: No such file or directory

However, I can bypass the mountpoint errors by setting the SYSTEMCTL_SKIP_REDIRECT environment variable

bash-4.2# SYSTEMCTL_SKIP_REDIRECT=yes ifup eth0
/etc/sysconfig/network-scripts/ifup-ipv6: line 91: /sbin/sysctl: No such file or directory
/etc/sysconfig/network-scripts/ifup-ipv6: line 115: [: -ne: unary operator expected

Unfortunately, while networking looks like it is up, the machine is unresponsive to the network (not pingable, not sshable).

bash-4.2# ifconfig
eth0      Link encap:Ethernet  HWaddr 2A:0F:4A:82:98:04
          inet addr:9.5.250.146  Bcast:9.5.250.255  Mask:255.255.255.0
          inet6 addr: fe80::280f:4aff:fe82:9804/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:38 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:2460 (2.4 KiB)
          Interrupt:20

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

bash-4.2# nslookup hamzy2.austin.ibm.com
[ 3082.076565] SQUASHFS error: xz_dec_run error, data probably corrupt
[ 3082.076587] SQUASHFS error: squashfs_read_data failed to read block 0x6e32d5a
[ 3082.076597] SQUASHFS error: Unable to read data cache entry [6e32d5a]
[ 3082.076604] SQUASHFS error: Unable to read page, block 6e32d5a, size 8ec4
Bus error

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User talk:Wwoods/Building images with treebuilder: Difference between revisions

Revision as of 19:30, 9 August 2011

Contents

Boot problem (jreiser)

notes/solutions (wwoods)

mount traps when systemd mounts /tmp (hamzy)

notes (wwoods)

Slow (jreiser)

commentary (wwoods)

speedups

The anaconda installer starts but then hangs (hamzy)

$HOME? (jreiser)

SQUASHFS errors (hamzy)

missing files for networking (hamzy)

networking does not work (hamzy)