Jenkins Xvfb in Centos 6

May 3rd, 2012 by Luzem No comments »

During my last adventures with Jenkins y suffered into a new problem trying to running my gtester’s test battery.

 [exec] TEST: tests/stkmngtest... (pid=13754)
     [exec]
     [exec] Gtk-WARNING **: cannot open display:
     [exec] aborting...
     [exec] FAIL: tests/stkmngtest

that my test suite were aborted makes Jenkins useless, and useless things are my competitors because the only useless thing allowed in my home is myself.

The basic problem is that there no are a XOrg session running, first I change runlevel to 5 and expect see test runing  a big FAIL was the result.

after reading a bit of literature I discover a thing called Xvfb

su

yum install Xvfb

yum install mesa-dri-drivers

the next step was try to install Xvfb plugin in jenkins but i doesn’t work it give these exception

FATAL: null
java.lang.NullPointerException
	at org.jenkinsci.plugins.xvfb.XvfbBuildWrapper.decorateLauncher(XvfbBuildWrapper.java:165)
	at hudson.model.AbstractBuild$AbstractRunner.createLauncher(AbstractBuild.java:525)
	at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:452)
	at hudson.model.Run.run(Run.java:1434)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:239)

the found a quick and dirty solution that is put a xvfb-run call in commands that need a xserver like this

<target name=”runtest” description=”run glib test”>
<exec executable=”xvfb-run”>
<arg value=”gtester”/>
<arg value=”tests/stkmngtest”/>
<arg value=”–keep-going”/>
<arg value=”-o=Tests.xml”/>
</exec>
</target>

I will continuetrying to get Xvfb working in Jenkins

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Jenkins git ssh auth in Centos 6

April 21st, 2012 by Luzem No comments »

jenkins

After install Gitlab the next step  was install Jenkins and start to work with a continuous integration server. I installed Jenkins following doc and create a new project for one of my repos. and i get this output

Building in workspace /var/lib/jenkins/jobs/PFC/workspace
Checkout:workspace / /var/lib/jenkins/jobs/PFC/workspace – hudson.remoting.LocalChannel@1aba936a
Using strategy: Default
Cloning the remote Git repository
Cloning repository origin
ERROR: Error cloning remote repo ‘origin’ : Could not clone gitolite@git.luzem.com:pfc.git
hudson.plugins.git.GitException: Could not clone gitolite@git.luzem.com:pfc.git
at hudson.plugins.git.GitAPI.clone(GitAPI.java:245)
at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1117)
at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1059)
at hudson.FilePath.act(FilePath.java:832)
at hudson.FilePath.act(FilePath.java:814)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1059)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1218)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:581)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:470)
at hudson.model.Run.run(Run.java:1421)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:238)
Caused by: hudson.plugins.git.GitException: Command “git clone –progress -o origin gitolite@git.luzem.com:pfc.git /var/lib/jenkins/jobs/PFC/workspace” returned status code 128:
stdout: Initialized empty Git repository in /var/lib/jenkins/jobs/PFC/workspace/.git/

stderr: Host key verification failed.
fatal: The remote end hung up unexpectedly

at hudson.plugins.git.GitAPI.launchCommandIn(GitAPI.java:779)
at hudson.plugins.git.GitAPI.access$000(GitAPI.java:38)
at hudson.plugins.git.GitAPI$1.invoke(GitAPI.java:241)
at hudson.plugins.git.GitAPI$1.invoke(GitAPI.java:221)
at hudson.FilePath.act(FilePath.java:832)
at hudson.FilePath.act(FilePath.java:814)
at hudson.plugins.git.GitAPI.clone(GitAPI.java:221)
… 12 more
Trying next repository
ERROR: Could not clone repository
FATAL: Could not clone
hudson.plugins.git.GitException: Could not clone
at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1129)
at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1059)
at hudson.FilePath.act(FilePath.java:832)
at hudson.FilePath.act(FilePath.java:814)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1059)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1218)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:581)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:470)
at hudson.model.Run.run(Run.java:1421)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:238)

When you install Jenkins from the repos one problem is configure ssh keys for jenkins user, the first thing to configure ssh keys was su jenkins and run ssh keygen but it failed because i can’t log with Jenkins user.

i open a terminal as root on server machine as root and start writing:

vim /etc/passwd

changing jenkins line

jenkins:x:492:486:Jenkins Continuous Build server:/var/lib/jenkins:/bin/false

for

jenkins:x:492:486:Jenkins Continuous Build server:/var/lib/jenkins:/bin/bash

after changuing this line you can do

su jenkins

cd

ssh-keygen

cat .ssh/id_rsa.pub

now you have the key for your jenkins user and it can pull from your repos

for more security edit again /etc/passwd and pul false in jenkins shell

jenkins:x:492:486:Jenkins Continuous Build server:/var/lib/jenkins:/bin/false

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Installing GitLab 2.1 on Centos 6

March 12th, 2012 by Luzem 10 comments »

gitlab logo

Step 1: Install needed packages

you will need remove installed ruby because repo version is 1.8.7 and we need 1.9 at least

yum remove ruby

yum install wget

enable epel repos

wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-5.noarch.rpm

rpm -Uvh epel-release-6-5.noarch.rpm

install required libraries

yum install readline-devel  libyaml-devel gdbm-devel  ncurses-devel  redis openssl-devel zlib-devel gcc gcc-c++ make autoconf readline-devel curl-devel expat-devel gettext-devel  tk-devel  libxml2-devel libffi-devel libxslt-devel libicu-devel httpd httpd-devel gitolite git-all python-devel python-pip sqlite-devel sendmail vim mysql-devel

Step 2: Install Ruby 1.9.3

wget http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p0.tar.gz

tar xzvf ruby-1.9.3-p0.tar.gz

cd ruby-1.9.3-p0

./configure

make

make install

Step 3: Install gitolite

Create gitolite-admin user

    useradd -d /home/gitolite-admin gitolite-admin

generate RSA key pair for gitolite-admin user

su gitolite-admin
ssh-keygen
exit

Move generate public key to gitolite home dir

cp /home/gitolite-admin/.ssh/id_rsa.pub /var/lib/gitolite/id_rsa_gitolite_admin.pub
chown gitolite:gitolite /var/lib/gitolite/id_rsa_gitolite_admin.pub

complete gitolite and gitolite-admin users pairing

su gitolite
gl-setup /var/lib/gitolite/id_rsa_gitolite_admin.pub

a editor will opened changue repo permissions to 0007

$REPO_UMASK to 0007
exit
su gitolite-admin
cd
git clone gitolite@localhost:gitolite-admin

in the last command you clone the gitolite-admin repo on gitolite-admin’s home. Gitolite-admin repo is gitolite config

before continue we need configure gitolite-admin git profile

git config –global user.email “gitolite-admin@localhost”
git config –global user.name “gitolite-admin”
exit

add gitolite-admin to gitolite group

usermod -a -G gitolite gitolite-admin

changue gitolite-admin password

passwd gitolite-admin

Step 6 Launch Redis

chkconfig redis on

/etc/init.d/redis start

Step 7 GitLab

Clone GitLab sourcecode

cd /var/www

git clone git://github.com/gitlabhq/gitlabhq.git

chown -R gitolite-admin:gitolite-admin gitlabhq/

cd gitlabhq/

Install phython dependencies

pip-python install pygments

Install required gems

gem install bundler

bundle install

su gitolite-admin

bundle install

Prepare config files

cp config/database.yml.example config/database.yml

cp config/gitlab.yml.example config/gitlab.yml

Prepare production enviroment

RAILS_ENV=production rake db:setup
RAILS_ENV=production rake db:seed_fu

you will get these login data

login………admin@local.host
password……5iveL!fe

Config gitolite gitlab link

vim config/gitlab.yml

your  git_host: section must be like this

# Git Hosting congiguration
git_host:
system: gitolite
admin_uri: gitolite@localhost:gitolite-admin
base_path: /var/lib/gitolite/repositories/
host: localhost
git_user: gitolite
# port: 22

fix gitolite permissions

chmod -R 770 /var/lib/gitolite/repositories/

try your installation launching webrick

bundle exec rails s -e production

open a web broser, write  yourhost:3000 and check if everything is working if you get an error send me a comment

Install passenger for Apache

gem install passenger
passenger-install-apache2-module

follow screen instructions

edit apache config file

vim /etc/httpd/conf/httpd.conf

and append these lines at the end

LoadModule passenger_module /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.11/ext/apache2/mod_passenger.so
PassengerRoot /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.11
PassengerRuby /usr/local/bin/ruby

enable apache service

/etc/init.d/httpd start

chkconfig httpd on

Sources

http://wasil.org/en/gitlab-installation-on-fedora-16-with-gitolite

http://rickfoosusa.blogspot.com/2011/08/gitolite-tutorial-senawario.html

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Posted in Linux, Programación

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Installing OpenWRT Backfire in a fonera 2100

March 3rd, 2012 by Luzem No comments »

Sometimes pocket money isn’t enought for buy new network devices or we want to save some money changuing no existant money for personal time. In my case I needed to create a wireless bridge in my personal network, pass a ethernet wire between two builds wasn’t an option. Searching in my forgoten stuff boxes i found two foneras model 2100. Fon’s firmware isn’t powerfull enought to get wds and when these things happens Free Software is our solution. A couple of foneras Ready for flashing I’m a lucky man and I also found a usb to 3,3V serial adapter, one of my superpower is that i can brick everything. First of all we need to plug our serial adapter into fonera’s port, check the attached image for see jtag pinouts Fonera pinouts

when we have our jtag port connected we need a software for send data over jtag in my case i use GtkTerm.

in debian is simply I open a root terminal and I write

apt-get install GtkTerm

in the same term i write

gtkterm

I use a root terminal because I don’t want waste time configuring /dev/ttSy* permissions

next step is configure port speed 9600,8N1

in GtkTerm menu select configuration/port and fill data boxes, in my case port is /dev/ttyUSB0 if you don’t know your port a dmesg output can be helpul.

GtkTerm 9600,8N1

now is time to plug powersounce on our fonera and see output.

must be something like this in our gtkterm

Fonera booting

we need get access to redboot console  you only need un plug and plug powersource to fonera and press continously ctrl+c until you see

RedBoot>

we need download ou firmware go to

http://downloads.openwrt.org/backfire/10.03.1/atheros/

and download these files

  • openwrt-atheros-vmlinux.lzma
  • openwrt-atheros-root.squashfs
save the files and then we need install tftp server in our machine.

search ftpd config for your distro

Next step will be load files into fonera over tftpd config
in gtkterm we need write
ip_address -h <TFTP SERVER IP ADRESS> -l <ONE FREE IP IN YOUR NETWORK>/24
load -r -b %{FREEMEMLO} openwrt-atheros-vmlinux.lzma
fis init
fis create -e 0×80041000 -r 0×80041000 vmlinux.bin.l7
load -r -b %{FREEMEMLO} openwrt-atheros-root.squashfs
fis create rootfs
reset
if your system doesn’t boot because you have installed dd-wrt before or something similar write this in redboot console:
 fconfig boot_script_data
fis load -l vmlinux.bin.l7
exec
“press enter”
reset
enjoy
sources:

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Posted in Aparatitos, General, Linux

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Installing basic enviroment for start Developing Ruby on Rails apps under windows

October 10th, 2011 by Luzem No comments »

If you plant to start developing under Ruby on Rails one good start point could be installing a basic developement enviroment.

If you are using windows I hope that this tutorial could be usefull for you.

1.- Download rubycompiler, interpreter

you can get it from http://rubyforge.org/frs/?group_id=167

2.- Download RubyGems, will be necesary for get libraries

you can get it from http://rubyforge.org/frs/?group_id=126

uncompres the zip file, and open a terminal

cd <directory where you decompress rubygems>

ruby setup.rb

3.- Download rubyInstaller developement kit

http://github.com/downloads/oneclick/rubyinstaller/DevKit-tdm-32-4.5.2-20110712-1620-sfx.exe

execute the downloaded file in a directory like: C:\\Devkit

when you have it extrated open a terminal and write

cd <Devkit installer dir>

ruby dk.rb init

ruby dk.rb review

ruby dk.rb install

4.- Install rails

Open a terminal and write

gem install rails

5.- Donload and install JDK (needed for netbeans)

http://www.oracle.com/technetwork/java/javase/downloads/index.html

6.- Download amd install  Netbeans

http://netbeans.org/

7.- Install Netbeans ruby plugin

Open netbeans and select tools->plugins menu

netbeans plugins

a new dialog appears, select avaliable plugins tab and mak ruby and rails plugin

ruby and rails plugin netbeansClick install

and follow the install wizard

Congratulations you have a ruby on rails basic enviroment installed

You can create a new ruby on rails project in the wizard File->New Project

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Distribución en el Muestreo

September 27th, 2011 by Luzem No comments »

Para ir practicando ejercicios resueltos y medianamente explicados, no tengo tiempo para pasarlos a libreOffice asi que van a manito (no tengo mejor letra)

PDF

Distribución en el muestreo

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Inferencia estadistica: Intervalos de Confianza

September 27th, 2011 by Luzem No comments »

Otro boletín (a mano para que os acostumbréis a mi letra cochambrosa )

PDF

Boletín Intervalos de confianza

Enjoy

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Contraste de Hipótesis

September 27th, 2011 by Luzem No comments »

Otro boletín a manita (mi letra sigue sin mejorar) :-(

Contraste de Hipótesis

Boletín métodos estadísticos

Enjoy

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Distribución en el muestreo y Estimación Puntual

September 27th, 2011 by Luzem No comments »

El ultimo boletin con mi letra, en este mundo existen cosas que no tienen arreglo y una de ella es mi letra :-(

Distribución en el muestreo y Estimación Puntual

Boletín Distribución en el muestreo y Estimación Puntual

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Examen diciembre 2010 Métodos Estadísticos

September 27th, 2011 by Luzem 2 comments »

1) (1,5 puntos) Dada una muestra aleatoria{x_1,x_2, ..., x_100}de una distribución normal de media 16 y varianza 4, calcular el valor b tal que

2) (1,5 puntos) Encontrar el estimador máximo verosímil para el parámetro Beta de la función de densidad:

función de densidad3)(2 Puntos) El tiempo de acceso (en milisegundos) en situarse una aguja lectora/escritora en un cilindro se supone que sigue una distribución normal. Para determinar en el tiempo medio de acceso se obtuvo una muestra aleatoria de tamaño n=10, con media=14.23, cuasivarianza muestral 1,75 .

  1. Obtener un intervalo de confianza al 75% para mu , tiempo medio de acceso. A partir del intervalo anterior obtener el I.C. Para el tiempo medio en segundos.
  2. ¿Puedo asegurar en cualquier caso que el tiempo medio de acceso está siempre dentro del intervalo. Justifica tu respuesta
  3. Observando el intervalo, ¿Puedo afirmar que el tiempo medio de acceso es 12ms? Justifica tu respuesta
  4. Si se mantiene la media y cuasivarianza muestral al aumentar el tamaño muestral ¿Que le ocurre a la longitud del intervalo y a su nivel de confianza? Justifica tu respuesta..

4)(2 puntos) Según el informe del observatorio galego da sociedade da informacion del 2009, el porcentaje de hogares que disponen de conexión de banda ancha a internet es del 38,3% obtenida a partir de una muestra de 1000 hogares En 2008, una muestra de 1200 hogares indico que el 35,3% de los hogares disponían de banda ancha.

  1. ¿Se justifica la conclusión de que en 2008 hay un porcentaje distinto al 2009 con un nivel de significación del 5%? Responder sin usar el p-valor y calculando en p-valor.
  2. Si los datos anteriores se mantuviesen constantes el aumentar los tamaños muestrales, como afectaría esta cambio a la decisión del contraste y al valor numérico del p-valor. Justifica tu respuesta.

enjoy

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Posted in Métodos Estadísticos

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