Category: Linux

BIND9 with DDNS updates on Debian Sid

November 17, 2016
BindLinux
0 Comment

As part of some work to resolve a kubernetes application deployment.
The particular application i’m working with has hard dependencies on DNS, particularity, A, TXT and SRV records.
For each kubernetes pod that spins up, i need it to register itself into DNS.
Then the other services can discover themselves.

Here is a basic excerpt of enabling DDNs updates on example.com

Install the basics

apt-get install bind bind9utils dnsutils

Forward Lookup Zone

cat > /etc/named/db.example.com.conf <
Reverse Lookup Zone
cat > /etc/named/db.10.1.1.conf <
Named local config (should be included from named.conf)
cat > /etc/named/named.conf.local <
Key file
cat > /etc/named/rndc-key <
Fix any permissions issues and restart the server
chown root:bind /etc/bind/*
chmod g+w /etc/bind
systemctl restart bind9.service

Test the DDNS updates works
(
  echo "server 127.0.0.1"
  echo "zone example.com"

  echo "update delete xyz.example.com A"
  echo "update add xyz.example.com 120 A 192.0.2.1"
  echo "send"
) | /usr/bin/nsupdate -k "/etc/bind/rndc.key"

Nslookup for good measure
nslookup xyz.example.com 127.0.0.1

Debian Sid Intel I217-V Not Working

November 15, 2016
BashCodeLinux
0 Comment

After scouring for ages looking for this fix. I’ve decided to document it.
It comes form a number of sources. Kudos to the individual people.

Problem
Rebooting from windows into Linux renders the NIC unusable. the classic “lights are on but no one is home”
Some people advice disabling PXE etc in the bios. There is a better solution

Identify the NIC

root@dave-pc:/lib/systemd/system# lspci | grep Ether
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-V (rev 04)

Create a systemd oneshot service file

cat <> /lib/systemd/system/intelnicreset.service
[Unit]
Description=Reset Intel Nic on Boot before it comes up
Before=NetworkManager.service
Wants=NetworkManager.service

[Service]
Type=oneshot
ExecStart=/usr/bin/resetintelnic
RemainAfterExit=no

[Install]
WantedBy=multi-user.target
EOT

Reset NIC bash file

cat <> /usr/bin/resetintelnic
#!/bin/bash

#Get the PCI-Address of network card (Caution: This works ONLY with ONE NIC)
PCI=`/usr/bin/lspci | /bin/egrep -i 'network|ethernet' | /usr/bin/cut -d' ' -f1`
PCIPATH=`/usr/bin/find /sys -name *\${PCI} | /bin/egrep -i *pci0000*`
/usr/bin/logger -t "ResetNIC" "Resetting PCI NIC ${PCIPATH}"

#Reset the PCI Device completely (like Power-ON/Off)
echo 1 >${PCIPATH}/reset
EOT

Make it executable

chmod +x /usr/bin/resetintelnic

Synology Filebot Autonaming cron job

November 15, 2016
BashCodeFilebotLinuxPHP
2 Comments

Having a synology NAS is great. However when dealing with 32tb, good file management is a must!
I have 2 primary folders, Films and Series. The set of below scripts iterate the files and use the TVDB and MovieDB to clean up the file names.
The second scripts downloads any missing subtitles for the media 🙂

File renaming

&1" ) );

foreach( $loglines as $logline )
{
  $line = trim( $logline );

  if( $line == "" ) continue;
  if( preg_match( "/^Skipped.*$/", $line, $dontcare ) ) continue;
  if( preg_match( "/^Auto-detect movie from context.*$/", $line, $dontcare ) ) continue;
  if( preg_match( "/.*Rename movies using.*$/", $line, $dontcare ) ) continue;

  $ploglines[] = $line;
}

$frt = implode( "\r\n" , $ploglines );

$body = "Dear user,\n\n $frt \n\nSincerely,\nSynology DiskStation\n\n";
mail($email, 'DSM - Filebot Rename Report - Films', "$body");


$log = "/volume1/homes/admin/cleanup/report-rename.txt";
unlink( $log );
touch( $log );

if ($handle = opendir('/volume1/Entertainment/Series/'))
{
  while (false !== ($entry = readdir($handle)))
  {
    if ($entry != "." && $entry != "..")
    { 
      $cmd = "filebot -r -rename \"/volume1/Entertainment/Series/$entry/\" --db TheTVDB 2>&1";
      $frt = shell_exec( $cmd );
      file_put_contents( $log, $frt . "\n\n", FILE_APPEND | LOCK_EX );
    }
  }
  closedir($handle);
}

$ploglines = array();
$loglines = file( $log );

foreach( $loglines as $logline )
{
  $line = trim( $logline );

  if( $line == "" ) continue;
  if( preg_match( "/'^Skipped.*$/", $line, $dontcare ) ) continue;
  if( preg_match( "/^Fetching episode data.*$/", $line, $dontcare ) ) continue;
  if( preg_match( "/^Processed.$*/", $line, $dontcare ) ) continue;
  if( preg_match( "/^Done.*$/", $line, $dontcare ) ) continue;
  if( preg_match( "/^Failure.*$/", $line, $dontcare ) ) continue;
  if( preg_match( "/^No media files.*$/", $line, $dontcare ) ) continue;

  $ploglines[] = $line;
}

$frt = implode( "\r\n" , $ploglines );

$body = "Dear user,\n\n $frt \n\nSincerely,\nSynology DiskStation\n\n";
mail($email, "DSM - Filebot Rename Report - Series $entry", "$body");

Subtitles scripts

&1" );
$body = "Dear user,\n\n $fst \n\nSincerely,\nSynology DiskStation\n\n";
mail($email, 'DSM - Filebot Subtitles Report - Films', "$body");

if ($handle = opendir('/volume1/Entertainment/Series/'))
{
  while (false !== ($entry = readdir($handle)))
  {
    if ($entry != "." && $entry != "..")
    { 
      $cmd = "filebot -r -script fn:suball \"/volume1/Entertainment/Series/$entry/\" --lang en -non-strict --db TheTVDB 2>&1";
      $frt = shell_exec( $cmd );
      file_put_contents( $log, $frt . "\n\n", FILE_APPEND | LOCK_EX );
    }
  }
  closedir($handle);
}

$frt = file_get_contents( $log );
$body = "Dear user,\n\n $frt \n\nSincerely,\nSynology DiskStation\n\n";
mail('dave@fio.ie', "DSM - Filebot Subtitles Report - Series $entry", "$body");

Cron Job

ash-4.3# cat /etc/crontab 
MAILTO=""
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/syno/sbin:/usr/syno/bin:/usr/local/sbin:/usr/local/bin
#minute hour    mday    month   wday    who     command
0       0       1       *       *       root    /usr/syno/bin/syno_disk_health_record
0       0       *       *       3       root    /usr/bin/php /var/services/homes/admin/cleanup/filebot-rename.php
0       0       *       *       5       root    /usr/bin/php /var/services/homes/admin/cleanup/filebot-subtitles.php
5       3       *       *       6       root    /usr/syno/bin/synomyds --report_info
0       3       *       *       1       root    /tmp/synoschedtask --run id=1
0       3       13      *       *       root    /tmp/synoschedtask --run id=2
11      2       *       *       4       root    /tmp/synoschedtask --run id=3

Systemd Networkd Chef Cookbook

November 14, 2016
Configuration ManagementLinuxRuby
0 Comment

This cookbook is responsible for configuring systemd-networkd. A modified version of systemd networkd is required.

This can be found @ https://github.com/Intel-Corp/systemd

Recipes

  • default: sets up directories and deletes old configurations
  • cpuport: configures attributes specific to cpu port
  • link: configures port state and port speed
  • static_mac_table: confgures the static MAC table (FDB)
  • switchport: configures port attributes
  • team: configures LAGs and LAG-specific features (e.g. LAG attributes)
  • ufd: configures uplink failure detection
  • backup: copies pre-requisities for backup tool – see below for ussage

More Details
https://supermarket.chef.io/cookbooks/systemd_networkd

Fancy Screen .screenrc config

November 14, 2016
Linux
0 Comment

Not quite sure of the original source of this one! But handy config for screen 🙂

untitled

vi ~/.screenrc

# the following two lines give a two-line status, with the current window highlighted
hardstatus alwayslastline
hardstatus string '%{= kG}[%{G}%H%? %1`%?%{g}][%= %{= kw}%-w%{+b yk} %n*%t%?(%u)%? %{-}%+w %=%{g}][%{B}%m/%d %{W}%C%A%{g}]'

# huge scrollback buffer
defscrollback 5000

# no welcome message
startup_message off

# 256 colors
attrcolor b ".I"
termcapinfo xterm 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm'
defbce on

# mouse tracking allows to switch region focus by clicking
mousetrack on

# default windows
screen -t Shell1  1 bash
screen -t Shell2  2 bash
screen -t Python  3 python
screen -t Media   4 bash
select 0
bind c screen 1 # window numbering starts at 1 not 0
bind 0 select 10

# get rid of silly xoff stuff
bind s split

# layouts
layout autosave on
layout new one
select 1
layout new two
select 1
split
resize -v +8
focus down
select 4
focus up
layout new three
select 1
split
resize -v +7
focus down
select 3
split -v
resize -h +10
focus right
select 4
focus up

layout attach one
layout select one

# navigating regions with Ctrl-arrows
bindkey "^[[1;5D" focus left
bindkey "^[[1;5C" focus right
bindkey "^[[1;5A" focus up
bindkey "^[[1;5B" focus down

# switch windows with F3 (prev) and F4 (next)
bindkey "^[OR" prev
bindkey "^[OS" next

# switch layouts with Ctrl+F3 (prev layout) and Ctrl+F4 (next)
bindkey "^[O1;5R" layout prev
bindkey "^[O1;5S" layout next

# F2 puts Screen into resize mode. Resize regions using hjkl keys.
bindkey "^[OQ" eval "command -c rsz" # enter resize mode

# use hjkl keys to resize regions
bind -c rsz h eval "resize -h -5" "command -c rsz"
bind -c rsz j eval "resize -v -5" "command -c rsz"
bind -c rsz k eval "resize -v +5" "command -c rsz"
bind -c rsz l eval "resize -h +5" "command -c rsz"

# quickly switch between regions using tab and arrows
bind -c rsz \t    eval "focus"       "command -c rsz" # Tab
bind -c rsz -k kl eval "focus left"  "command -c rsz" # Left
bind -c rsz -k kr eval "focus right" "command -c rsz" # Right
bind -c rsz -k ku eval "focus up"    "command -c rsz" # Up
bind -c rsz -k kd eval "focus down"  "command -c rsz" # Down