kevinz

Comparison between 2 HA solutions

	Sloutin 1	Slution 2
Compare Item	SUSE LINUX HA EXTENSION	KeepAlived

kevinz

#MSC for lvs in DR transparent mode
msc{
        hscale = "2";
        Client,LB,RS,OS;

        Client=>Client [ label = "req(oip:oport)"];
        Client=>Client [ label = "routeto(LB)"];
        Client->LB [ label = "(cip:cport)->(oip:oport)"];
        LB=>LB     [ label = "iptable->fwmark(dst==oip,dst_port=oport)"];
        LB=>LB     [ label = "(cip:cport)->(oip:oport)+fwmark"];

kevinz

#define __KERNEL__
#define MODULE

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netfilter_ipv4.h>
#include <linux/skbuff.h>
#include <linux/udp.h>
#include <linux/ip.h>

kevinz

obj-m := hello.o
KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)
default:
	$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules

kevinz

//sniffer.c
//To compile : gcc -o sniffer sniffer.c -lpcap
//To run : ./sniffer [interface-name]

#include <pcap.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>

kevinz

#+AUTHOR: Kevin Zeng
#+Email: [email protected]
#+TODO: TODO(t) IN-PROGRESS(p) WAIT(r) SUSPEND(s) | DONE(d)
#+TAGS: Kevin(k) Tom(o) Laurence(l) Gavin(g)
LVS performance test environment overview
* Purpose
- Make a simple overview page for performance test.
- For better communication.
* Deployment
** LVS in NAT mode

kevinz

//’Hello World’ v2 netfilter hooks example
//For any packet, get the ip header and check the protocol field
//if the protocol number equal to UDP (17), log in var/log/messages
//default action of module to let all packets through

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/skbuff.h>

kevinz

diff -bur /home/vagrant/redis-2.8.21/redis.conf /home/vagrant/redis-2.8.21_codis/redis.conf
--- /home/vagrant/redis-2.8.21/redis.conf	2015-06-04 09:32:24.000000000 +0000
+++ /home/vagrant/redis-2.8.21_codis/redis.conf	2015-11-11 02:45:49.550199788 +0000
@@ -34,7 +34,7 @@
 
 # By default Redis does not run as a daemon. Use 'yes' if you need it.
 # Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
-daemonize no
+daemonize yes