phpMyAdmin root login vs. MariaDB

So I just installed a new Ubuntu 16.04 Xenial box with MariaDB 10.0 and phpMyAdmin but for some reason just can’t login as root user via phpMyAdmin, although it works via the shell. Turn’s out MariaDB enabled the unix_socket plugin-in for the root user, preventing phpMyAdmin from working out of the box like it does with native MySQL. So much for drop-in replacement – figuring that one out was quite frustrating…

Here’s how you disable it:

echo "update user set plugin='' where User='root'; flush privileges;" | mysql --defaults-file=/etc/mysql/debian.cnf mysql

Enable pci passthrough for QEMU/KVM

I have a couple older HP ProLiant DL360 Gen 6 and Gen 7 Server I want to use as virtual machine hosts with some PCIe devices mapped through to the guests running there, let’s say so they can directly access the Fibre Channel ports on the host or whatnot. Here’s how to do it (running Ubuntu 14.04 LTS that is, YMMV with other distributions):

  1. Edit your /etc/default/grub and add the intel_iommu=on boot option, it should look something like this (serial console for ILO enabled as well)
    GRUB_CMDLINE_LINUX="console=tty0 console=ttyS1,115200n8 intel_iommu=on"
  2. Add the vfio module to the list in /etc/modules
    # /etc/modules: kernel modules to load at boot time.
    # This file contains the names of kernel modules that should be loaded
    # at boot time, one per line. Lines beginning with "#" are ignored.
    # Parameters can be specified after the module name.
  3. Create a file like /etc/modprobe.d/vfio.conf setting the allow_unsafe_interrupts option for the vfio module.
    options vfio_iommu_type1 allow_unsafe_interrupts=1

    Otherwise you’ll get an error when trying to start a VM with a PCI device passed through: “failed to set iommu for container: Operation not permitted”
    Apparently the IOMMU interrupt remapping is kinda broken on this platform.

  4. Reboot your server and create a VM with one of your PCIe adapters passed through – it should show up just like if was a native device on a real, physical server.

XMPP notifications for check_mk

Want to have your check_mk notifiy you via XMPP / Jabber if something goes boom? Here’s a little Python notification script which does just that…

You’ll need sleekxmpp installed, either via pip install sleekxmpp  or apt-get install python3-sleekxmpp  if you’re running Ubuntu.

Next, just add the script to check_mk by placing it here: […]/share/check_mk/notifications/xmpp

#!/usr/bin/env python
# Send Notifications via XMPP

import sleekxmpp
import sys
import os
import logging
import time

class SendMsgBot(sleekxmpp.ClientXMPP):
    def __init__(self, jid, password, recipient, msg):
        super(SendMsgBot, self).__init__(jid, password)
        self.recipient = recipient
        logging.debug("Recipient: %s" % recipient)
        self.msg = msg
        logging.debug("Message: %s" % msg)
        self.add_event_handler('session_start', self.start)

    def start(self, event):
        self.send_message(mto=self.recipient, mbody=self.msg)
        logging.debug("Message send")

if __name__ == '__main__':
    logging.basicConfig(filename='/tmp/notifications.log', format='%(asctime)s %(levelname)s:%(message)s', level=logging.ERROR)
    message = os.environ["NOTIFY_NOTIFICATIONTYPE"]+"\nHost: "+os.environ["NOTIFY_HOSTNAME"]+" - "+os.environ["NOTIFY_HOSTSTATE"]+"\nHost-Plugin-Output: "+os.environ["NOTIFY_HOSTOUTPUT"]+"\nService: "+os.environ["NOTIFY_SERVICEDESC"]+" - "+os.environ["NOTIFY_SERVICESTATE"]+"\nService-Plugin-Output:"+os.environ["NOTIFY_SERVICEOUTPUT"]+"\n-------------------------\n\n"
    if os.environ["NOTIFY_SERVICEDESC"] != '$SERVICEDESC$':
        message = "SERVICE"
        message = "HOST"
        message = message+"-"+os.environ["NOTIFY_NOTIFICATIONTYPE"]+"\n"+os.environ["NOTIFY_SHORTDATETIME"]+"\nHost: "+os.environ["NOTIFY_HOSTNAME"]+" - "+os.environ["NOTIFY_HOSTSTATE"]
    if os.environ["NOTIFY_SERVICEDESC"] == '$SERVICEDESC$':
        message = message+"\nHost-Plugin-Output: "+os.environ["NOTIFY_HOSTOUTPUT"]
        message = message+"\nService: "+os.environ["NOTIFY_SERVICEDESC"]+" - "+os.environ["NOTIFY_SERVICESTATE"]+"\nService-Plugin-Output:"+os.environ["NOTIFY_SERVICEOUTPUT"]
        message = message+"\n-------------------------\n\n"
        logging.debug("%s" % message)
xmpp = SendMsgBot("[email protected]", "yourpassword" , os.environ["NOTIFY_PARAMETER_1"], message)

Now call the script with the destination ([email protected]) you want notified as custom parameter from within check_mk and give it a try by triggering some alert.

(Originally from here, but last time I checked indentation was broken and the site mostly down)

Event Console not showing up in check_mk

After spending the last couple hours trying to figure out why the event console wasn’t showing up in my manually upgraded OMD/check_mk install (that is OMD 1.2 w/ check_mk 1.2.4p5 upgraded to 1.2.6b10) even though mkeventd is running – here’s what you got to do: manually copy the files from your check_mk source directory into the install director. The setup script does everything else for your, except that.

cd ~
cd check_mk-1.2.6b10/mkeventd.src
rsync -av web/* ~/local/share/check_mk/web/
sending incremental file list

sent 210,421 bytes received 346 bytes 421,534.00 bytes/sec
total size is 209,125 speedup is 0.99

That’s it. WATO should now show the event console again and things like rule based notification will also work.

KVM too fast for plymouth-upstart-bridge

Kind of a hilarious bug, really… I recently installed another Ubuntu 14.04 server running inside a KVM with a rather fast storage backend, therefore the system apparently boots just a tiny bit faster than my other images have in the past. Problem is, apparently that slows down the boot process as init thinks something must be crashing and decides to respawn it for good measure…

[ 2.311174] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[ 2.811553] init: plymouth-upstart-bridge main process (191) terminated with status 1
[ 2.812789] init: plymouth-upstart-bridge main process ended, respawning
[ 2.874117] init: plymouth-upstart-bridge main process (210) terminated with status 1
[ 2.875167] init: plymouth-upstart-bridge main process ended, respawning
[ 2.904155] init: plymouth-upstart-bridge main process (217) terminated with status 1
[ 2.905289] init: plymouth-upstart-bridge main process ended, respawning
[ 2.928618] init: plymouth-upstart-bridge main process (221) terminated with status 1
[ 2.929713] init: plymouth-upstart-bridge main process ended, respawning
[ 49.975826] Adding 2093052k swap on /dev/mapper/[...]

Yep, that’s right – 47 seconds waiting and idling, doing nothing when the image could have booted in a fraction of that time.

To fix it, simply add a sleep 2 to your /etc/init/plymouth-upstart-bridge.conf

stop on (stopping plymouth
         or stopping plymouth-shutdown)     

console output

exec plymouth-upstart-bridge
sleep 2

Init won’t freak out anymore and starts the image as it’s supposed to:

[    1.225045] random: lvm urandom read with 16 bits of entropy available
[    1.281118] bio: create slab <bio-1> at 1
[    1.370262] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)
[    1.684687] tsc: Refined TSC clocksource calibration: 2500.001 MHz
[    2.153550] Adding 2093052k swap on /dev/mapper/[....]-swap_1.  Priority:-1 extents:1 across:2093052k FS
[    2.169332] EXT4-fs (dm-0): re-mounted. Opts: errors=remount-ro
[    2.190451] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
[    2.408937] EXT4-fs (vda1): mounting ext2 file system using the ext4 subsystem
[    2.417990] EXT4-fs (vda1): mounted filesystem without journal. Opts: (null)
[    3.316769] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[    3.316778] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[    3.495345] FS-Cache: Loaded

Way better….

Updating SmartArray controllers on 64-bit Ubuntu 14.04

Want to install a firmware update on one of your HP SmartArray controllers while running a 64-bit OS? Turns out, the binaries distributed by HP seem to be 32-bit only – running for example Ubuntu 14.04, here’s what you gotta do…

./CP021971.scexe: 153: ./CP021971.scexe: pushd: not found
./CP021971.scexe: 158: ./CP021971.scexe: popd: not found
./ccissflash: error while loading shared libraries: cannot open shared object file: No such file or directory


But libstdtc++6 seems already installed, hmpf… 32-bit maybe?

root@host:~# dpkg --add-architecture i386
root@host:~# apt-get update
root@host:~# apt-get install libstdc++6:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  gcc-4.8-base:i386 gcc-4.9-base:i386 libc6:i386 libgcc1:i386


Let’s try that again…

./CP021971.scexe: 153: ./CP021971.scexe: ./CP021971.scexe: 158: ./CP021971.scexe: popd: not found
pushd: not found

        This program consists of two phases: device discovery and device update.
        No device will be updated until you answer.

Do you want to run device discovery?
(yes/no) yes
Finding hardware. This may take a few minutes.
Found 1 devices.

Do you want to upgrade the device that has older ROM?
(yes/no) yes
1 devices will be updated.
Updating: P410i Slot: 0 from [5.70] to [6.40]
Updating: P410i Slot: 0 from [5.70] to [6.40]

As part of the reboot process, you must power cycle the server and any external array storage devices.

Well, that was rather easy…

Fix check_hpasm for 3.x kernels

After upgrading one of my HP ProLiant servers to Ubuntu 12.04 LTS (better late than never) the check_hpasm Nagios plugin broke, resulting in no regular checks of the internal arrays being performed.

Apparently that’s a known bug with the hpacucli utility doing the actual checks, which can’t uname returning a 3.x kernel version. You can manually fix this by running it like this:

 setarch x86_64 --uname-2.6 [[program] [program arguments]]
 setarch x86_64 --uname-2.6 hpacucli ctrl all show

Therefore a quick and dirty fix for check_hpasm would be to open up /usr/lib/nagios/plugins/check_hpasm and go to the part that reads:

if [ -x "$hpacucli" ]; then
 for i in config status
$hpacucli ctrl all show $i | while read line
 printf "%s %s\n" $i "$line"

and replace the line (553 in my case) calling hpacucli with:

/usr/bin/setarch x86_64 --uname-2.6 $hpacucli ctrl all show $i | while read line

Worked just fine for me.