Service Chaining

drwilco / varnishlog2curl.sh

Created September 1, 2016 22:32

	log=$(cat -)
	request=$(echo "$log" \| grep -E "^ [0-9]+ TxRequest" \| sed -E 's/^ [0-9]+ TxRequest *b //')
	url=$(echo "$log" \| grep -E "^ [0-9]+ TxURL" \| sed -E 's/^ [0-9]+ TxURL *b //')
	headers=$(echo "$log" \| grep -E "^ [0-9]+ TxHeader" \| sed -E 's/^ [0-9]+ TxHeader b (.)$/-H "\1"/' \| paste -s -d ' ' \| sed 's/\!/\\\!/g')
	read backend lip lport rip rport ssl <<<$(echo "$log" \| grep -E "^ [0-9]+ Backend(Addr\|Open)" \| sed -E 's/^ [0-9]+ Backend(Addr\|Open) *b //')

	if [ "$f" = "SSL" ]; then
	proto="https"
	else
	proto="https"

drwilco / gist:5855867

Created June 25, 2013 04:08

	(gdb) i br
	Num Type Disp Enb Address What
	3 hw watchpoint keep y (void *)0x604030
	breakpoint already hit 7532228 times
	silent
	if $_siginfo->_sifields->_sigfault->si_addr == 0x7ffff7bd80e1 \|\| (void *)0x604030 == 0x7ffff2414048
	cont
	else
	bt
	end

drwilco / gist:5702807

Last active December 18, 2015 01:19

assembly and lines intermixed

	objdump -S /usr/sbin/varnishd \| awk '/00000000004836f0/ {flag=1;next}
	/0000000000483a30/{flag=0} flag {print}' \| while read addr asm
	do
	line=`addr2line -i -e /usr/sbin/varnishd $addr`
	if [ "x$line" != "x$last" ]
	then
	echo "$addr $line"
	fi
	echo "$asm"
	last="$line"

drwilco / 1 timebench.c

Last active December 22, 2015 08:47

	/* gcc -o timebench timebench.c -lrt -O2 -fno-inline */
	/* no-inline for better readable objdump -d output */
	#include <time.h>
	#include <sys/time.h>
	#include <sys/syscall.h>
	#include <unistd.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

drwilco / test.sh

Created October 18, 2012 04:46

I did something with bash coproc

	drwilco@guari:~$ pstree -hp 23944
	bash(23944)───grep(2832)─┬─grep(2836)
	└─yes(2835)

	(23944 is the interactive shell that I used to start test.sh)

drwilco / gist:1361753

Created November 13, 2011 07:25

	varnishd -d -f ~/test-directors.vcl -C \| grep VGC
	#define VGCDIR(n) VCL_conf.director[VGC_backend_##n]
	#define VGC_backend__b1 1
	#define VGC_backend__b2 2
	#define VGC_backend__rr 3
	#define VGC_backend__rnd 4
	#define VGC_backend__cl 5
	#define VGC_backend__hsh 6
	#define VGC_backend_dyn_1 1
	#define VGC_backend_dyn_2 2

drwilco / gist:1283884

Created October 13, 2011 09:57

	My traceroute [v0.73]
	brigit.drwilco.net (0.0.0.0) Thu Oct 13 11:57:16 2011
	Keys: Help Display mode Restart statistics Order of fields quit
	Packets Pings
	Host Loss% Snt Last Avg Best Wrst StDev
	1. 5ED13001.cm-7-2a.dynamic.ziggo.nl 0.0% 9 7.0 7.2 5.7 10.9 1.6
	2. gv-rc0052-ds102-vl202.core.as9143.net 0.0% 9 5.0 7.5 5.0 10.7 1.9
	3. gv-rc0011-cr102-ae12-0.core.as9143.net 0.0% 9 7.2 8.4 6.0 11.9 1.6
	4. asd-tr0409-cr101-ae8-0.core.as9143.net 0.0% 9 6.6 26.2 6.6 82.0 28.8
	5. tengigabitethernet1-3.ar2.ams1.gblx.net 0.0% 8 9.5 8.3 6.5 10.0 1.4

drwilco / 2.1-make-check.log

Created September 10, 2011 05:42

2.1 branch test failure

	Script started on Fri 09 Sep 2011 10:12:18 PM PDT
	drwilco@guari:~/dev/varnish$ git clone git://git.varnish-cache.org/varnish-cache 2.1

	Cloning into 2.1...

	remote: Counting objects: 48004, done.[K

	remote: Compressing objects: 0% (1/14738) [K
	remote: Compressing objects: 1% (148/14738) [K
	remote: Compressing objects: 2% (295/14738) [K

drwilco / base.conf

Created September 8, 2011 00:13

setting up base lxc

Rogier 'DocWilco' Mulhuijzen drwilco