Evernote Openbook: lstoll's public notebook

mirroring rubygems

Mon, 10 Nov 2008 05:57:29 GMT

#!/bin/bash
#rsync -av rsync://rubyforge.rubyuser.de/gems/ /mirror/rubygems/gems/
#rsync -av rsync://rubyforge.rubyuser.de/files/ /mirror/rubygems/files/
/usr/local/bin/gem mirror
/usr/local/bin/gem generate_index -d /mirror/rubygems/rubyforge
/usr/local/bin/gem generate_index -d /mirror/rubygems/github

config in ~/.gemmirrorrc

root@bigguns:/mirror/rubygems# cat /var/www/.gemmirrorrc
---
- from: http://gems.github.com
to: /mirror/rubygems/github/
- from: http://gems.rubyforge.org
to: /mirror/rubygems/rubyforge/

You can specify the config file on the command line, but doesnt seem to work (as of 1.3.1 at least)

apache configs:

root@bigguns:/mirror/rubygems# cat /etc/apache2/sites-available/gems.rubyforge.org

ServerName gems.rubyforge.org

Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all

DocumentRoot /mirror/rubygems/gems

ServerName gems.github.com

Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all

DocumentRoot /mirror/rubygems/github

http://jonathan.tron.name/2008/05/23/creating-your-own-rubygem-mirror

Passenger/Ruby Enterprise on 8.04

Fri, 20 Feb 2009 04:14:19 GMT

App user: appuser

Gems required on client: capistrano, capistrano-ext, tinder

Deploy Environments:
edge: master branch. (DEFAULT)
-
staging: production branch - for qa before going to prod. DB pull from prod, the migrate
-
production: production branch. main site.

Using viget_deploy plugin for rsync strategy http://github.com/vigetlabs/viget_deployment

script/plugin install git://github.com/vigetlabs/viget_deployment.git

see page for config. Multistage stuff here: http://weblog.jamisbuck.org/2007/7/23/capistrano-multistage
-

Server Software: Apache 2, Phusion Passenger 2.0RC2, MySQL, Ruby Enterprise, Ruby 1.8.6-p231, Rubygems 1.2.0

Notes: If you want to add gems to the rails app's environment, use /opt/

Cool things TODO: Some kind of CI magic. Sinatra app on Passenger Rack, called by github, pulls code, runs tests, emails results.

Commands run for setup:

apt-get update
apt-get upgrade

- Install firewall
apt-get install shorewall
cd /etc/shorewall
cp /usr/share/doc/shorewall-common/default-config/interfaces .
cp /usr/share/doc/shorewall-common/default-config/policy .
cp /usr/share/doc/shorewall-common/default-config/rules .
cp /usr/share/doc/shorewall-common/default-config/zones .
edit /etc/shorewall/interfaces
add "net eth0 detect"
edit nano /etc/shorewall/zones
add "net ipv4"
edit /etc/shorewall/policy
add "fw net ACCEPT
net all DROP info
all all REJECT info"
edit /etc/shorewall/rules
add "ACCEPT net fw tcp 22
ACCEPT net fw tcp 80
Ping/ACCEPT net $FW"
edit /etc/default/shorewall
change startup=0 to startup=1
/etc/init.d/shorewall start

- Install ruby

wget http://rubyforge.org/frs/download.php/41040/ruby-enterprise-1.8.6-20080810.tar.gz
tar -zxvf ruby-enterprise-.tar.gz
cd ruby-enter

./installer

gem install passenger

passenger-install-apache2-module

update to match what is output:

echo "LoadModule passenger_module /usr/local/lib/ruby/gems/1.8/gems/passenger-2.0.3/ext/apache2/mod_passenger.so" > /etc/apache2/mods-available/passenger.load
cat >> /etc/apache2/mods-availab...

Clone a xen vm

Sun, 22 Jun 2008 04:20:02 GMT

lvcreate -L5G -n tweedledone.railscamp.net-disk percvg0
dd bs=128M if=/dev/percvg0/base.railscamp.net-disk of=/dev/percvg0/tweedledone.railscamp.net-disk1

lvcreate -L1G -n tweedledone.railscamp.net-swap percvg0

mkswap /dev/percvg0/tweedledone.railscamp.net-swap

mount /dev/percvg0/tweedledone.railscamp.net-disk1 /mnt

nano /mnt/etc/hostname

nano /mnt/etc/network/interfaces

nano /mnt/etc/hosts

cp /etc/xen/base.railscamp.net.cfg /etc/xen/tweedledone.railscamp.net.cfg

nano /etc/xen/tweedledone.railscamp.net.cfg

Rails deployment recipe (fixed)

Sun, 22 Jun 2008 11:09:47 GMT

This is the start of a 'new' rails deployment recipe on a server, using mod_rails/apache2.2/ubuntu - using a set user for the application, keys to deploy, deploying as your own user (i.e not the app user), and code on github.

Also using postgresql for the database, so let's get that gem working too.

Install pre-requisites (For Ubuntu 7.10):

# Start a root shell
sudo -s

# Apt install basic stuff
apt-get install apache2-mpm-prefork apache2 apache2-prefork-dev libapr1-dev zlib1g-dev libssl-dev libncurses5-dev libreadline5-dev build-essential git-core wget nano

# Download and compile ruby and gems - sub in later versions if desired
mkdir -p /usr/local/src
cd /usr/local/src
wget ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.6-p114.tar.gz
wget http://rubyforge.org/frs/download.php/35283/rubygems-1.1.1.tgz
tar -zxvf ruby-1.8.6-p114.tar.gz

cd ruby-1.8.6-p114

./configure --with-readline

make

make install

cd ..

tar -zxvf rubygems-1.1.1.tgz

cd rubygems-1.1.1

ruby setup.rb

# ruby enterprise

cd ..
wget http://rubyforge.org/frs/download.php/38084/ruby-enterprise-1.8.6-20080507.tar.gz
tar -zxvf ruby-enterprise-1.8.6-20080507.tar.gz
./ruby-enterprise-1.8.6-20080507/installer

# Install a few useful gems

gem install rake postgres daemons rails passenger

/opt/ruby-enterprise-1.8.6-20080507/bin/gem install rake postgres daemons rails passenger

### NOTE - this now leaves us with two ruby interpreters - a default system one at

/usr/local/bin/ruby

and the ruby enterprise one at

/opt/ruby-enterprise-1.8.6-20080507/bin/ruby

# same for gems. remember this - and use the appropriate one. TODO - investigate making ruby enterprise the default system interpreter

# MySQL (optional)

sudo apt-get install mysql-server libmysqlclient15-dev

/opt/ruby-enterprise-1.8.6-20080507/bin/gem install mysql

# Install mod_railsgem install passenger

passenger-install-apache2-module

# Setup a 'debian' scheme compatible module config

echo "LoadModule passenger_module /usr/local/lib/ruby/gems/1.8/gems/passenger-1.0.5/ext/apache2/mod_passenger.so" > /etc/apache2/mods-available/rails.load

cat >> /etc/apac...

Local macports setup

Sun, 04 May 2008 08:31:59 GMT

Install from download

sudo port sync && sudo port selfupdate

sudo port install apache2 mysql5 +server php5 +apache2 +mysql5 ruby rb-rubygems rb-mysql subversion +tools wget

make my.cnf in /opt/local/etc/mysql5 look like this:

[mysqld]
default_storage_engine = InnoDB
bind-address = 127.0.0.1
datadir = /Users/databases/mysql

sudo mkdir -p /Users/databases/mysql
sudo chown -R mysql:mysql /Users/databases/mysql

sudo -u mysql mysql_install_db5

sudo launchctl load -w /Library/LaunchDaemons/org.macports.mysql5.plist

/opt/local/lib/mysql5/bin/mysqladmin -u root password 'new-password'
# will not work, because we are only listening on 127.0.0.1 - here in case i change that
/opt/local/lib/mysql5/bin/mysqladmin -u root -h linc.local password 'new-password'

linc:/opt/local/etc/mysql5 lstoll$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.0.45 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> grant all on *.* to lstoll@'%' identified by 'password' with grant option;
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

cd /opt/local/apache2/modules
sudo cp /opt/local/etc/php.ini-dist /opt/local/etc/php.ini
sudo cp /opt/local/apache2/conf/httpd.conf.sample /opt/local/apache2/conf/httpd.conf
sudo /opt/local/apache2/bin/apxs -a -e -n "php5" libphp5.so
sudo launchctl load -w /Library/LaunchDaemons/org.macports.apache2.plist

Include conf/extras-conf/*.conf
Include /Users/lstoll/sw/etc/apache2/*.conf

in httpd.conf

sudo ln -s /opt/local/apache2/bin/apachectl /opt/local/bin/
sudo apachectl graceful

Install gems:

sudo gem install -y rake
sudo gem install -y rails
sudo gem install -y capistrano
sudo gem install -y mongrel
sudo gem install -y mongrel_cluster
sudo gem install -y ruby-debug-ide # allows fast debug support in netbeans

sudo port install postgresql83 postgresql83-server
To create a database instance, after install do
sudo mkdir -p /Users/databases/postgres83/defaultdb
sudo chow...

UNIX Command Snippets

Sun, 04 May 2008 08:31:47 GMT

Each file:
for f in test/*tar*rb; do rbx -Ilib:test $f; done

ctrl-r - search previous commands

Rubinius Sprint Note

Sun, 04 May 2008 08:31:27 GMT

bin/mspec -t ruby will run under MRI

shotgun/ is the VM - C code.

kernel/ has the ruby code
In 'load' order:
kernel/bootstrap is the core functionality,
kernel/platform is the platform specific stuff - has a bunch for FFI calls to C
kernel/core/ is the rest of the ruby platform

benchmark/ has benchmarks

bin/ has scripts

stdlib/ is the ruby std lib imported from 1.8. when working, moved into
lib/ rubinius std lib

spec/ - rubinius specific specs
spec/ruby/1.8 - location for specs to test 1.8 behavior

READ README-DEVELOPERS!!

Backtrace color coding -
RED - Top - The error (where the raise was called)
BLUE - Kernel methods (i.e in kernel/)
NORMAL - User code

Object(Proc::Function)#should - the first item is the class where the method that was called comes from, in parentheses is the instance type
{} - says its in a block - __script__ is anonymous code (i.e method body)
# - class method, . - instance method
A#dothing (blowup) - #dothing is the original method, (blowup) is the alias (I think.. confirm this)

Describe block must start with class.method

Example for file.umask

it "invokes to_int on non-integer argument" do
(obj = mock(022)).should_receive(:to_int).any_number_of_times.and_return(022)
File.umask(obj)
File.umask(obj).should == 022
end

POSIX.umask(mask) changed to POSIX.umask(Integer(mask)) to ensure integer is passed it

run 'rake' to re-compile before running

git commit:
Commit messsage - first line, 70 chars, short explanation of the change
Empty line
(OPTIONAL - not for short/simple changes) - bulleted list of changes

git format-patch HEAD^ (makes a patch for the current location -1 rev - more carets is further back, or ~ for that many back)

Route-Based VPN From SSG to Billion Modem

Sun, 04 May 2008 08:30:45 GMT

SSG SIDE:

NOTE: Looks like the tunnel interface must be seperate for any hub&spoke links. Need to validate this.

- Create a new zone on the SSG (need to have one for each vpn/gateway - i.e office is in office zone, lincs place is in lincs zone)

- Create a new tunnel interface for this vpn, bind it to the external interface

- Create a new gateway

ADVANCED:

(Rest doesnt matter.. may want to enable NAT-T if the remote endpoint requires it)

- Create a new IKE Auto-Key VPN

- In advanced, set a proxy ID for the local and remote networks, bind to the tunnel

- Create a policy to permit traffic down the VPN

(Same as normal policy's, only for traffic required)

- Network/Routing/Destination

Create a new route down the tunnel interface for the remote network

BILLION SIDE: Create a new IPSec VPN Entry:

xen-create-image examples

Tue, 11 Nov 2008 07:18:40 GMT

sudo xen-create-image --hostname=gutsy32.dev.stripe.com --lvm=percvg0 --size=20Gb --swap=1gb --ip=172.16.104.244 --netmask=255.255.255.0 --gateway=172.16.104.1 --memory=512Mb --arch=i386 --kernel=/boot/vmlinuz-2.6.22-14-xen --initrd=/boot/initrd.img-2.6.22-14-xen --dist=gutsy --mirror=http://mirror.internode.on.net/pub/ubuntu/ubuntu/ --passwd --force

Unknown option: debootstrap <--- i.e don't need it in the command????
--force <-- be careful with this!

REF:

sudo xen-create-image --hostname=gutsy32.dev.stripe.com --lvm=percvg0 --size=20Gb --swap=1gb --ip=172.16.104.244 --netmask=255.255.255.0 --gateway=172.16.104.1 --force --memory=512Mb --arch=amd64 --kernel=/boot/vmlinuz-2.6.22-14-xen --initrd=/boot/initrd.img-2.6.22-14-xen --debootstrap --dist=dapper --mirror=http://mirror.internode.on.net/pub/ubuntu/ubuntu/ --passwd

sudo xen-create-image --hostname=enrico.railscamp.net --lvm=percvg0 --size=5G --swap=1gb --ip=172.16.104.201 --netmask=255.255.255.0 --gateway=172.16.104.1 --memory=256mb --arch=amd64 --kernel=/boot/vmlinuz-2.6.24-18-xen --initrd=/boot/initrd.img-2.6.24-18-xen --dist=hardy --mirror=http://172.16.104.251/ubuntu/main --passwd

sudo xen-create-image --hostname=railscamp.lstoll.net --dir=/xen-store --size=20Gb --swap=1gb --ip=172.16.2.3 --netmask=255.255.255.0 --gateway=172.16.2.1 --memory=512mb --arch=i386 --kernel=/boot/vmlinuz-2.6.24-19-xen --initrd=/boot/initrd.img-2.6.24-19-xen --dist=hardy --mirror=http://172.16.2.2:9999/ubuntu --passwd

Ubuntu network config

Sun, 04 May 2008 08:29:10 GMT

Howto: Ubuntu Linux convert DHCP network configuration to static IP configuration

My friend wanted to know how to change or convert DHCP network configuration to static configuration. After initial installation, he wanted to change network settings. Further, his system is w/o GUI system aka X Windows. Here is quick way to accomplish the same:
Your main network configuration file is /etc/network/interfaces
Desired new sample settings:
=> Host IP address 192.168.1.100
=> Netmask: 255.255.255.0
=> Network ID: 192.168.1.0
=> Broadcast IP: 192.168.1.255
=> Gateway/Router IP: 192.168.1.254
=> DNS Server: 192.168.1.254
Open network configuration file
$ sudo vi /etc/network/interfaces
OR
$ sudo nano /etc/network/interfaces
Find and remove dhcp entry:
iface eth0 inet dhcp
Append new network settings:
iface eth0 inet static
address 192.168.1.100
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.254

Save and close the file. Restart the network:
$ sudo /etc/init.d/networking restart
Task: Define new DNS servers
Open /etc/resolv.conf file
$ sudo vi /etc/resolv.conf
You need to remove old DNS server assigned by DHCP server:
search myisp.com
nameserver 192.168.1.254
nameserver 202.54.1.20
nameserver 202.54.1.30

Save and close the file.
Task: Test DNS server
$ host cyberciti.biz
Network command line cheat sheet
You can also use commands to change settings. Please note that these settings are temporary and not the permanent. Use above method to make network changes permanent or GUI tool as described below.
Task: Display network interface information
$ ifconfig
Task: Take down network interface eth0 / take a network interface down
$ sudo ifconfig eth0 down
OR
$ sudo ifdown eth0
Task: Bring a network interface eth0 up
$ sudo ifconfig eth0 up
OR
$ sudo ifup eth0
Task: Change IP address and netmask from command line
Activate network interface eth0 with a new IP (192.168.1.50) / netmask:
$ sudo ifconfig eth0 192.168.1.50 netmask 255.255.255.0 up
Task: Display the routing table
$ /sbin/route
OR
$ /sbin/route -n

Output:
Kernel IP routing table
Destination ...

XEN HVM Clock issues (gutsy)

Sun, 04 May 2008 08:28:52 GMT

VM's die under HVM XEN (esp. Windows)

the vm will die or hard lock on a feisty xen server because of clock issues

On the dom0, run the following:

sudo echo "jiffies" > /sys/devices/system/clocksource/clocksource0/current_clocksource

May want to add to /etc/rc.local so it is fixed on boot.

Create a windows XEN vm

Sun, 04 May 2008 08:28:33 GMT

Create a volume:

lvcreate -L40G -n dc1.prod.stripe.com_disk1 vg0

Create a new config file like this in /etc/xen/.cfg

# -*- mode: python; -*-
#============================================================================
# Python configuration setup for 'xm create'.
# This script sets the parameters used when a domain is created using 'xm create'
# You use a separate script for each domain you want to create, or
# you can set the parameters for the domain on the xm command line.
#============================================================================

## Do we really need this on ubuntu? its all lib, no lib64.
#import os, re
#arch = os.uname()[4]
#if re.search('64', arch):
# arch_libdir = 'lib64'
#else:

#arch_libdir = 'lib'

#----------------------------------------------------------------------------

# Kernel image file.
kernel = "/usr/lib/xen-ioemu-3.1/boot/hvmloader"

# The domain build function. HVM domain uses 'hvm'.
builder='hvm'

# Initial memory allocation (in megabytes) for the new domain.
memory = 1024

# A name for your domain. All domains must have different names.
name = "dc1.prod.stripe.com"

#-----------------------------------------------------------------------------

# the number of cpus guest platform has, default=1
#vcpus=1
# enable/disable HVM guest ACPI, default=0 (disabled)
#acpi=1
# enable/disable HVM guest APIC, default=0 (disabled)
#apic=0
# Pae
#pae=1
# List of which CPUS this domain is allowed to use, default Xen picks
#cpus = "" # leave to Xen to pick
#cpus = "0" # all vcpus run on CPU0
#cpus = "0-3,5,^1" # run on cpus 0,2,3,5

# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
vif = [ 'type=ioemu, bridge=xenbr0' ]

# type=ioemu specify the NIC is an ioemu device not netfront
#vif = [ 'type=ioemu, mac=aa:00:b0:00:00:11, bridge=xenbr0' ]

#----------------------------------------------------------------------------
# Define the disk devices you want the domain to have access to, and
# what you want them accessible...

Building a basic dev server/slice

Mon, 26 Oct 2009 10:51:23 GMT

Starting with a base Feisty machine.

h3. Getting base up and running, with remote access

su / login as root

# bring up to date
bq.

apt-get update
apt-get upgrade

# set timezone, if not prompted above
tzconfig 

install nano(use whatever editor you like), ssh, debian config stuff, screen, and locale/language info
bq. apt-get install ssh openssh-server language-pack-en-base nano configure-debian screen

configure the system
bq. configure-debian
in base, adduser set system wide readable home directories to no

add a user
bq. adduser lstoll
set their details here

set the user to have sudo rights
bq. visudo
add a line at the bottom like this:
bq. lstoll  ALL=(ALL) ALL

# SSH in from a remote machine, and copy your ssh keys up
TODO - describe/link to this

back to the console of the machine you are setting up, edit the sshd config file
bq. nano /etc/ssh/sshd_config
change the Port 22 entry to an alternate port (e.g Port 1352)
change PermitRootLogin yes to PermitRootLogin no
change PasswordAuthentication yes to PasswordAuthentication no . THIS MEANS ONLY KEYS WILL GET YOU IN

# restart ssh server
/etc/init.d/ssh restart

h3. Getting your session ready

# End your terminal session. Log back in via ssh, with the user you created above

# Start screen. that way, if you get disconnected, you can get back in
screen

# If your ssh session drops out, just log back in, and run
screen -r

# Start a root shell
sudo -s

h3. Setting up the postgresql database server

Install the database server app
apt-get install postgresql-8.2 postgresql-client-8.2 libpq-dev

Configure some basic params

Edit /etc/postgresql/8.2/main/pg_hba.conf and change

local   all         all                               ident sameuser

to

local   all         all                               md5

(i.e force all non-postgres user logins to be via a md5'd password, rather than auto login)

Edit /etc/postgresql/8.2/main/postgresql.conf and change
#password_encryption = on
to
password_encry...



Ditch KVM and install XEN on hardy
Wed, 21 May 2008 07:40:36 GMT

    
    
    
        
        After much debate, decided that KVM on ubuntu is too complex, and just doesn't feel reliable enough to use as a primary virtualization technology - things like not being able to switch a cdrom on a image is kinda sucky, and the libvirt tools don't feel finished. So maybe soon, but for now it's XEN - especially as it's more widely used. (The main driver for KVM was the fact that it's 'official' ubuntu).Also moving back to LVM based VM's as opposed to image, so they can be snapshot'd individually, and not as a whole.

# Kill the network bridge
edit /etc/network/interfaces, change back to this:
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address 172.16.104.251
        network 172.16.104.0
        netmask 255.255.255.0
        broadcast 172.16.104.255
        gateway 172.16.104.1
        dns-nameservers 172.16.104.1

then /etc/init.d/networking restart


# Remove kvm
sudo apt-get remove kvm libvirt-bin qemu python-virtinst bridge-utils uml-utilities
sudo apt-get autoremove

I had to reboot here. network stuff screwed up

# Install xen
sudo apt-get update
sudo apt-get install ubuntu-xen-server xen-tools # N.B this install should work on a install upgraded to hardy - by default it will have 3.1, this should install 3.2

If this is an upgrade, you will get hit up to merge/keep/replace config files - I'm choosing to replace.

sudo nano /boot/grub/menu.lst - make sure the default is set to 'Xen 3.2 / Ubuntu 8.04, kernel 2.6.24-16-xen'

I needed two reboots after this for networking to come up correctly....

# Fix old VMs
Mount the lvm root to /mnt/xxx
chroot to the mounted dir
apt-get install update-manager-core
do-release-upgrade # this failed for me - apt-get update && apt-get upgrade finished the update

This is all bad - the update starts various things. Had to reboot to fix, so avoid this. If you update the kernel entries in the VM's config, it will boot - then do the upgrade. However, not booting - need to get the modules update. this is on the gutsy32 vm, which has a patch-job upgrade, and is 32 on 64.

Ok, further on - switchin...
    
    


Exchange certificates
Sat, 26 Apr 2008 15:22:43 GMT

    
    
    
        
        with cacert. need to import cacert root into mmc/certificates/computer/personal and root
Need to use xchange to generate the request, the sign with cacert, and instal:

New-ExchangeCertificate -generaterequest -subjectname "dc=net,dc=lstoll,o=lstoll.net,cn=exch.lstoll.net" -domainname exch,exch.ad.lstoll.net,exch.lstoll.net,autodiscover.lstoll.net -PrivateKeyExportable $true -path c:\certrequest.txt


Import-ExchangeCertificate -Path c:\cert.txt -friendlyname "exch.lstoll.net cert"

then apply:


    
    


kvm on hardy
Sat, 26 Apr 2008 08:37:02 GMT

    
    
    
        
        sudo apt-get install libvirt-bin kvm qemu python-virtinst bridge-utils uml-utilitiessudo -s## BRIDGED NETWORKINGcp /etc/network/interfaces /etc/network/interfaces.baknano /etc/network/interfacesmake it look like this:auto lo
iface lo inet loopback

auto br0
iface br0 inet static
        address 172.16.104.251
        network 172.16.104.0
        netmask 255.255.255.0
        broadcast 172.16.104.255
        gateway 172.16.104.1
        dns-nameservers 172.16.104.1
        bridge_ports eth0
        bridge_fd 9
        bridge_hello 2
        bridge_maxage 12
        bridge_stp off


/etc/init.d/networking restart
#Create the VM (windows_virt-install --name=exch.lstoll.net --ram=1024 --file=/vm/exch.lstoll.net_root.img --file-size=40 --nonsparse --network=bridge:br0 --vnc --connect=qemu:///system --accelerate -c Windows_Server_2003_Standard_x64.iso --os-type=windows --os-variant=win2k3 --vcpus=2 --check-cpu
and you'll get an error like this:Sat, 26 Apr 2008 12:42:16 ERROR    'virtio_blk'
Traceback (most recent call last):
  File "/usr/bin/virt-install", line 519, in 
    main()
  File "/usr/bin/virt-install", line 438, in main
    guest, hvm, conn)
  File "/usr/bin/virt-install", line 134, in get_disks
    disk, size)
  File "/usr/bin/virt-install", line 133, in 
    map(lambda d, s: get_disk(d, s, sparse, guest, hvm, conn),
  File "/usr/bin/virt-install", line 108, in get_disk
    d.virtio = guest.get_virtio_blk()
  File "/usr/lib/python2.5/site-packages/virtinst/FullVirtGuest.py", line 206, in get_virtio_blk
    return FullVirtGuest.OS_TYPES[self.os_type]["virtio_blk"]
KeyError: 'virtio_blk'
so:apt-get install build-essential debhelper cdbs python-all-dev fakerootexit root shellcd ~ ; mkdir src ; cd srcapt-get source python-virtinstwget http://launchpadlibrarian.net/13887057/221746.diffcd virtinst-0.300.2/patch -p1 < ../221746.diffsudo dpkg-buildpackage -rfakeroot -uc -bsudo dpkg -i ../python-virtinst_0.300.2-0ubuntu6_all.deb## NOTE - the previous should be obsolete soon, update will hit the repositores.virt-install --name=exch.lsto...
    
    


Move a rails app to jruby (postgres, glassfish v3)
Tue, 22 Apr 2008 04:50:19 GMT

    
    
    
        
        Have an existing rails app. want to move to jruby, for the 'fastest' runtime possible. means jndi/jdbc for db. want to use glassfish gem for dev (to be close to prod), and glassfish v3 for prod.
Install gems:
jruby -S gem install jdbc-postgres activerecord-jdbcpostgresql-adapter rails rake glassfish


Update database.yml:

from:
development:
  adapter: postgresql 
  encoding: unicode
  database: services_dev
  username: xxx
  password: xxx
  host: localhost
  port: 5432

to:

development:
  adapter: jdbcpostgresql
  encoding: unicode
  database: services_dev
  username: xxxx
  password: xxxx
  host: localhost
  port: 5432

try:  

jruby -S glassfish_rails .

and your app should be up on 3000. that was easy.

Now we need to 


    
    


Kill a process after a certain amount of time.
Thu, 17 Apr 2008 15:10:26 GMT

    
    
    
        
        Good way to run a process for a certain amount of time, like killing a rsync before peak download time kicks in.
rake sync_rubygems & sleep 20 ; kill $!
    
    


Rails deployment recipe
Thu, 12 Jun 2008 07:39:24 GMT

    
    
    
        
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Below is a rendering of the page up to the first error.
Rails deployment recipe
4/16/2008, 9:32 PM Tags:  rails,   deployment   Permalink   
This is the start of a 'new' rails deployment recipe on a server, using mod_rails/apache2.2/ubuntu - using a set user for the application, keys to deploy, deploying as your own user (i.e not the app user), and code on github.

Also using postgresql for the database, so let's get that gem working too.

Install pre-requisites (For Ubuntu 7.10):

# Start a root shell
sudo -s

# Apt install basic stuff
apt-get install apache2-mpm-prefork apache2 apache2-prefork-dev libapr1-dev zlib1g-dev libssl-dev libncurses5-dev libreadline5-dev build-essential git-core

# Download and compile ruby and gems - sub in later versions if desired
mkdir -p /usr/local/src
cd /usr/local/src
wget ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.6-p114.tar.gz
wget http://rubyforge.org/frs/download.php/35283/rubygems-1.1.1.tgz
tar -zxvf ruby-1.8.6-p114.tar.gzcd ruby-1.8.6-p114./configure --with-readlinemakemake installcd ..tar -zxvf rubygems-1.1.1.tgzcd rubygems-1.1.1ruby setup.rb# Install a few useful gemsgem install rake postgres daemons# Install mod_railsgem install passengerpassenger-install-apache2-module# Setup a 'debian' scheme compatible module configecho "LoadModule passenger_module /usr/local/lib/ruby/gems/1.8/gems/passenger-1.0.1/ext/apache2/mod_passenger.so" > /etc/apache2/mods-available/rails.load

cat >> /etc/apache2/mods-available/rails.conf << EOF
RailsSpawnServer /usr/local/lib/ruby/gems/1.8/gems/passenger-1.0.1/bin/passenger-spawn-server
RailsRuby /usr/local/bin/ruby
EOF# enable the modulea2enmod rails# create a directory for the applicationmkdir -p /srv/rails/services# Create the apache log dir for the appmkdir -p /srv/rails/services/apachelog# Create a deployment groupaddgroup appdeploy# change the services dir group and set permschgrp appdeploy /srv/rails/serviceschmod g+rw /srv/rails/services# create a user and gro...
    
    


Welcome
Wed, 16 Apr 2008 11:25:37 GMT

    
    
    
        
        This is my public evernote notebook. Think of it as a unformatted, always draft blog.