Author: David Saliba

Playing with Glusterfs

Posted on by David Saliba

More details in a later post but I finally realized the order of things ? Thought I’d share.

 

Reference sites:
http://www.gluster.org/community/documentation/index.php/Getting_started_configure
http://www.redhat.com/magazine/009jul05/features/gfs_practices/

mkdir ~/gluster
cd ~/gluster

wget -l 1 -nd -nc -r -A.rpm http://download.gluster.org/pub/gluster/glusterfs/LATEST/RHEL/epel-6/x86_64/

 

yum install glusterfs-libs-*.el6.x86_64.rpm -y
yum install glusterfs-*.el6.x86_64.rpm -y
yum install glusterfs-fuse-*.el6.x86_64.rpm -y
yum install glusterfs-cli-*.el6.x86_64.rpm -y
yum install glusterfs-server-*.el6.x86_64.rpm -y
yum install glusterfs-geo-replication-*.el6.x86_64.rpm -y

service glusterd start
chkconfig glusterd on

service glusterfsd start
chkconfig glusterfsd on

gluster peer probe <hostname of the other server in the cluster, or IP address if you don’t have DNS or /etc/hosts entries>


dd if=/dev/zero of=~/test.bin count=10000k
losetup /dev/loop0 test.bin

fdisk /dev/loop0 ---> new partition all blocks fdisk --> n -> p -> 1 -> from 1 to 637 in this case

yum install xfsprogs xfsdump -y

mkfs.xfs -i size=512 /dev/loop0 -f

--- Testing fs --------
mkdir /mnt/test
mount /dev/loop0 /mnt/test



--------fstab -----

/root/test.bin /mnt/test xfs loop 0 0

>>>>> test rebooting


mkdir -p /mnt/test/brick

gluster volume create gv0 replica 2 192.168.1.81:/mnt/test/brick 192.168.1.79:/mnt/test/brick

gluster volume info

Volume Name: gv0
Type: Replicate
Volume ID: cb3110c8-82b0-45f5-9e38-98652a95b54b
Status: Created
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: 192.168.1.81:/mnt/test/brick
Brick2: 192.168.1.79:/mnt/test/brick 




gluster volume start gv0

Just the client

  yum install glusterfs-libs-3.5.0-2.el6.x86_64.rpm -y
  yum install glusterfs-3.5.0-2.el6.x86_64.rpm -y
  yum install glusterfs-fuse-3.5.0-2.el6.x86_64.rpm -y

nJoy 😉

Auto-blacklist iptables

Posted on by David Saliba

Gather a list of ips which fail logins and drop from firewall for the future

lastb | awk '{ FS == "[ \t]+" ; print $3; }' | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}'| grep -v "192.168." | sort | uniq | xargs -n 1 -I {} iptables -A INPUT -s {} -j DROP

if you want to make it permanent simply

[root@DellR510-3 ~]# /sbin/service iptables save

 

That’s it.

nJoy 😉

 

 

 

Fix node Geoip update fails

Posted on by David Saliba

After a routine update of a customer’s application resulted in a broken package

npm update

gyp ERR! configure error
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack at ChildProcess.onCpExit (/usr/local/lib/node_modules/npm/nod
gyp ERR! stack at ChildProcess.EventEmitter.emit (events.js:98:17)
gyp ERR! stack at Process.ChildProcess._handle.onexit (child_process.js:789:
gyp ERR! System Linux 2.6.32-431.1.2.0.1.el6.i686
gyp ERR! command “node” “/usr/local/lib/node_modules/npm/node_modules/node-gyp/b
gyp ERR! cwd /root/pmt/node_modules/geoip
gyp ERR! node -v v0.10.24
gyp ERR! node-gyp -v v0.12.1
gyp ERR! not ok
npm ERR! geoip@0.4.12 install: `node-gyp rebuild`
npm ERR! Exit status 1

 npm ls in the folder reveals  :  UNMET DEPENDENCY geoip 0.4.x  marked in red.

npm ERR! missing: geoip@0.4.x, required by Autheticatagainstdb@
npm ERR! not ok code 0

Solution :

(more…)

VBS script to gather all IIS 6 Sites , state and folders for storage

Posted on by David Saliba

This is a script from this site which I found particularly handy.

OPTION EXPLICIT

DIM CRLF, TAB
DIM strServer
DIM objWebService

TAB  = CHR( 9 )
CRLF = CHR( 13 ) & CHR( 10 )

IF WScript.Arguments.Length = 1 THEN
    strServer = WScript.Arguments( 0 )
ELSE
    strServer = "localhost"
END IF

WScript.Echo "Enumerating websites on " & strServer & CRLF
SET objWebService = GetObject( "IIS://" & strServer & "/W3SVC" )
EnumWebsites objWebService

SUB EnumWebsites( objWebService )
    DIM objWebServer, objWebServerRoot, strBindings
    DIM myFSO
    DIM WriteStuff
    DIM tmp 

    Set myFSO = CreateObject("Scripting.FileSystemObject")
    Set WriteStuff = myFSO.OpenTextFile("siteList.txt", 8, True)
    tmp = "Site ID|Comment|State|Path|LogDir|HostHeaders|SecHostHeaders"
    WriteStuff.WriteLine(tmp)

    FOR EACH objWebServer IN objWebService
        IF objWebserver.Class = "IIsWebServer" THEN
        SET objWebServerRoot = GetObject(objWebServer.adspath & "/root")
            tmp = objWebserver.Name & "|" & _
                objWebServer.ServerComment & "|" & _ 
                State2Desc( objWebserver.ServerState ) & "|" & _ 
                objWebServerRoot.path & "|" & _ 
                objWebServer.LogFileDirectory & "|" & _   
                EnumBindings(objWebServer.ServerBindings) & "|" & _
        EnumBindings(objWebServer.SecureBindings) & "|" & _
        ""
            WriteStuff.WriteLine(tmp)
        END IF
    NEXT

END SUB

FUNCTION EnumBindings( objBindingList )
    DIM i, strIP, strPort, strHost
    DIM reBinding, reMatch, reMatches
    SET reBinding = NEW RegExp
    reBinding.Pattern = "([^:]*):([^:]*):(.*)"
    EnumBindings = ""
    FOR i = LBOUND( objBindingList ) TO UBOUND( objBindingList )
        ' objBindingList( i ) is a string looking like IP:Port:Host
        SET reMatches = reBinding.Execute( objBindingList( i ) )
        FOR EACH reMatch IN reMatches
            strIP = reMatch.SubMatches( 0 )
            strPort = reMatch.SubMatches( 1 )
            strHost = reMatch.SubMatches( 2 )

            ' Do some pretty processing
            IF strIP = "" THEN strIP = "All Unassigned"
            IF strHost = "" THEN strHost = "*"
            IF LEN( strIP ) < 8 THEN strIP = strIP & TAB

        EnumBindings = EnumBindings & strHost & "," & ""
        NEXT    
    NEXT
    if len(EnumBindings) > 0 Then EnumBindings = Left(EnumBindings,Len(EnumBindings)-1)
END FUNCTION

FUNCTION State2Desc( nState )
    SELECT CASE nState
    CASE 1
        State2Desc = "Starting (MD_SERVER_STATE_STARTING)"
    CASE 2
        State2Desc = "Started (MD_SERVER_STATE_STARTED)"
    CASE 3
        State2Desc = "Stopping (MD_SERVER_STATE_STOPPING)"
    CASE 4
        State2Desc = "Stopped (MD_SERVER_STATE_STOPPED)"
    CASE 5
        State2Desc = "Pausing (MD_SERVER_STATE_PAUSING)"
    CASE 6
        State2Desc = "Paused (MD_SERVER_STATE_PAUSED)"
    CASE 7
        State2Desc = "Continuing (MD_SERVER_STATE_CONTINUING)"
    CASE ELSE
        State2Desc = "Unknown state"
    END SELECT

END FUNCTION

Works like a charm..

 

nJoy 😉

Node.js and Express with HTTPS

Posted on by David Saliba

Quoting from the doco + some missing stuff:

var express = require('express');
var https = require('https');
var http = require('http');
var app = express();
var fs = require('fs');

var options = {
key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
};

http.createServer(app).listen(80);
https.createServer(options, app).listen(443);

nJoy 😉

Replacing a piece of XML with awk

Posted on by David Saliba

This script searches for an initial tag and and closing one and replaces the content.

# !/bin/bash
awk ‘
BEGIN {pr = 1;one = 0}
/<Name>OPENING<\/Name>/ {pr = 0;}
{ if (pr) print }
{ if (!pr && !one) {print (“\t\t <Name>OPENING</Name> \n \t\t\t <Value>false</Value> \n \t\t<Type>STOPHERE</Type> \n ” ); one =1 ;}}
/<Type>STOPHERE<\/Type>/ {pr = 1;}
‘< $1

Not the most elegant solution but lends itself to multiple replacements.

 

find . | grep file.xml | xargs -I {J} -n 1 bash -c ‘ ./aw.sh {J} > {J}.new ; mv -f {J}.new {J}  ‘

nJoy 😉

 

 

 

Track ftp password from tcpdump Linux

Posted on by David Saliba

Very nice and simple:

tcpdump port ftp -l -A | egrep -i ‘pass=|pwd=|log=|login=|user=|username=|pw=|passw=|passwd=|password=|pass:|user:|username:|password:|login:|pass |user ‘ –color=auto –line-buffered -B20

nJoy  😉

Adding all new files and subdirs to svn

Posted on by David Saliba

Sometimes you find yourself catching up with some devs who did not care to add all the stuff they should to SVN or you want to make sure all files are in SVN. Well here’s a hand script :

svn status | awk ‘{if ($1 == “?”) print $2 }’ | xargs svn add

nJoy 😉