From the Canyon Edge -- :-Dustin

Tuesday, September 30, 2014

Apply updates to multiple systems simultaneously using Byobu and Shift-F9

A StackExchange question, back in February of this year inspired a new feature in Byobu, that I had been thinking about for quite some time:
Wouldn't it be nice to have a hot key in Byobu that would send a command to multiple splits (or windows?
This feature was added and is available in Byobu 5.73 and newer (in Ubuntu 14.04 and newer, and available in the Byobu PPA for older Ubuntu releases).

I actually use this feature all the time, to update packages across multiple computers.  Of course, Landscape is a fantastic way to do this as well.  But if you don't have access to Landscape, you can always do this very simply with Byobu!

Create some splits, using Ctrl-F2 and Shift-F2, and in each split, ssh into a target Ubuntu (or Debian) machine.

Now, use Shift-F9 to open up the purple prompt at the bottom of your screen.  Here, you enter the command you want to run on each split.  First, you might want to run:

sudo true

This will prompt you for your password, if you don't already have root or sudo access.  You might need to use Shift-Up, Shift-Down, Shift-Left, Shift-Right to move around your splits, and enter passwords.

Now, update your package lists:

sudo apt-get update

And now, apply your updates:

sudo apt-get dist-upgrade

Here's a video to demonstrate!


In a related note, another user-requested feature has been added, to simultaneously synchronize this behavior among all splits.  You'll need the latest version of Byobu, 5.87, which will be in Ubuntu 14.10 (Utopic).  Here, you'll press Alt-F9 and just start typing!  Another demonstration video here...




Cheers,
Dustin

Tuesday, September 23, 2014

An Elegant Weapon, for a More Civilized Age...


Before Greedo shot first...
Before a troubled young Darth Vader braided his hair...
Before midiclorians offered to explain the inexplicably perfect and perfectly inexplicable...
And before Jar Jar Binks burped and farted away the last remnants of dear Obi-Wan's "more civilized age"...

...I created something, of which I was very, very proud at the time.  Remarkably, I came across that creation, somewhat randomly, as I was recently throwing away some old floppy disks.

Twenty years ago, it was 1994.  I was 15 years old, just learning to program (mostly on my own), and I created a "trivia game" based around Star Wars.  1,700 lines of Turbo Pascal.  And I made every mistake in the book:
Of course I'm embarrassed by all of that!  But then, I take a look at what the program did do, and wow -- it's still at least a little bit fun today :-)

Welcome to swline.pas.  Almost unbelievably, I was able to compile it tonight on an Ubuntu 14.04 LTS 64-bit Linux desktop, using fpc, after three very minor changes:
  1. Running fromdos to remove the trailing ^M endemic of many DOS-era text files
  2. Replacing the (80MHz) CPU clock based sleep function with Delay()
  3. Running iconv to convert the embedded 437 code page ASCII art to UTF-8
Here's a short screen cast of the game in action :-)


Would you look at that!
  • 8-bit color!
  • Hand drawn ANSI art!
  • Scrolling text of the iconic Star Wars, Empire Strikes Back, and Return of the Jedi logos! 
  • Random stars and galaxies drawn on the splash screen!
  • No graphic interface framework (a la Newt or Ncurses) -- just a whole 'bunch of GotoXY().
  • An option for sound (which, unfortunately, doesn't seem to work -- I'm sure it was just 8-bits of bleeps and bloops).
  • 300 hand typed quotes (and answers) spanning all 3 movies!
  • An Easter Egg, and a Cheat Code!
  • Timers!
  • User input!
  • And an option at the very end to start all over again!
You can't make this stuff up :-)

But watching a video is boring...  Why don't you try it for yourself!?!

I thought this would be a perfect use case for a Docker.  Just a little Docker image, based on Ubuntu, which includes a statically built swline.pas, and set to run that one binary (and only that one binary when launched.  As simple as it gets, Makefile and Dockerfile.

$ cat Makefile 
all:
        fpc -k--static swline.pas

$ cat Dockerfile 
FROM ubuntu
MAINTAINER Dustin Kirkland
ADD swline /swline
ENTRYPOINT /swline

I've pushed a Docker image containing the game to the Docker Hub registry.
Quick note...  You're going to want a terminal that's 25 characters high, and 160 characters wide (sounds weird, yes, I know -- the ANSI art characters are double byte wide and do some weird things to smaller terminals, and my interest in debugging this is pretty much non-existant -- send a patch!).  I launched gnome-terminal, pressed ctrl-- to shrink the font size, on my laptop.
On an Ubuntu 14.04 LTS machine:

$ sudo apt-get install docker.io
$ sudo docker pull kirkland/swline:v1
$ sudo docker run -t -i kirkland/swline:v1

Of course you can find, build, run, and modify the original (horrible!) source code in Launchpad and Github.




Now how about that for a throwback Tuesday ;-)

May the Source be with you!  Always!
Dustin

p.s.  Is this the only gem I found on those 17 floppy disks?  Nope :-)  Not by a long shot.

Wednesday, September 10, 2014

Deploy OpenStack IceHouse like a Boss!


This little snippet of ~200 lines of YAML is the exact OpenStack that I'm deploying tonight, at the OpenStack Austin Meetup.

Anyone with a working Juju and MAAS setup, and 7 registered servers should be able to deploy this same OpenStack setup, in about 12 minutes, with a single command.


$ wget http://people.canonical.com/~kirkland/icehouseOB.yaml
$ juju-deployer -c icehouseOB.yaml
$ cat icehouseOB.yaml

icehouse:
  overrides:
    openstack-origin: "cloud:trusty-icehouse"
    source: "distro"
  services:
    ceph:
      charm: "cs:trusty/ceph-27"
      num_units: 3
      constraints: tags=physical
      options:
        fsid: "9e7aac42-4bf4-11e3-b4b7-5254006a039c"
        "monitor-secret": AQAAvoJSOAv/NRAAgvXP8d7iXN7lWYbvDZzm2Q==
        "osd-devices": "/srv"
        "osd-reformat": "yes"
      annotations:
        "gui-x": "2648.6688842773438"
        "gui-y": "708.3873901367188"
    keystone: 
      charm: "cs:trusty/keystone-5"
      num_units: 1
      constraints: tags=physical
      options: 
        "admin-password": "admin"
        "admin-token": "admin"
      annotations:
        "gui-x": "2013.905517578125"
        "gui-y": "75.58013916015625"
    "nova-compute":
      charm: "cs:trusty/nova-compute-3"
      num_units: 3
      constraints: tags=physical
      to: [ceph=0, ceph=1, ceph=2]
      options:
        "flat-interface": eth0
      annotations:
        "gui-x": "776.1040649414062"
        "gui-y": "-81.22811031341553"
    "neutron-gateway":
      charm: "cs:trusty/quantum-gateway-3"
      num_units: 1
      constraints: tags=virtual
      options:
        ext-port: eth1
        instance-mtu: 1400
      annotations:
        "gui-x": "329.0572509765625"
        "gui-y": "46.4658203125"
    "nova-cloud-controller": 
      charm: "cs:trusty/nova-cloud-controller-41"
      num_units: 1
      constraints: tags=physical
      options: 
        "network-manager": Neutron
      annotations:
        "gui-x": "1388.40185546875"
        "gui-y": "-118.01156234741211"
    rabbitmq: 
      charm: "cs:trusty/rabbitmq-server-4"
      num_units: 1
      to: mysql
      annotations:
        "gui-x": "633.8120727539062"
        "gui-y": "862.6530151367188"
    glance: 
      charm: "cs:trusty/glance-3"
      num_units: 1
      to: nova-cloud-controller
      annotations:
        "gui-x": "1147.3269653320312"
        "gui-y": "1389.5643157958984"
    cinder: 
      charm: "cs:trusty/cinder-4"
      num_units: 1
      to: nova-cloud-controller
      options: 
        "block-device": none
      annotations:
        "gui-x": "1752.32568359375"
        "gui-y": "1365.716194152832"
    "ceph-radosgw":
      charm: "cs:trusty/ceph-radosgw-3"
      num_units: 1
      to: nova-cloud-controller
      annotations:
        "gui-x": "2216.68212890625"
        "gui-y": "697.16796875"
    cinder-ceph:
      charm: "cs:trusty/cinder-ceph-1"
      num_units: 0
      annotations:
        "gui-x": "2257.5515747070312"
        "gui-y": "1231.2130126953125"
    "openstack-dashboard": 
      charm: "cs:trusty/openstack-dashboard-4"
      num_units: 1
      to: "keystone"
      options:
        webroot: "/"
      annotations:
        "gui-x": "2353.6898193359375"
        "gui-y": "-94.2642593383789"
    mysql: 
      charm: "cs:trusty/mysql-1"
      num_units: 1
      constraints: tags=physical
      options:
        "dataset-size": "20%"
      annotations:
        "gui-x": "364.4567565917969"
        "gui-y": "1067.5167846679688"
    mongodb:
      charm: "cs:trusty/mongodb-0"
      num_units: 1
      constraints: tags=physical
      annotations:
        "gui-x": "-70.0399979352951"
        "gui-y": "1282.8224487304688"
    ceilometer:
      charm: "cs:trusty/ceilometer-0"
      num_units: 1
      to: mongodb
      annotations:
        "gui-x": "-78.13333225250244"
        "gui-y": "919.3128051757812"
    ceilometer-agent:
      charm: "cs:trusty/ceilometer-agent-0"
      num_units: 0
      annotations:
        "gui-x": "-90.9158582687378"
        "gui-y": "562.5347595214844"
    heat:
      charm: "cs:trusty/heat-0"
      num_units: 1
      to: mongodb
      annotations:
        "gui-x": "494.94012451171875"
        "gui-y": "1363.6024169921875"
    ntp:
      charm: "cs:trusty/ntp-4"
      num_units: 0
      annotations:
        "gui-x": "-104.57728099822998"
        "gui-y": "294.6641273498535"
  relations: 
    - - "keystone:shared-db"
      - "mysql:shared-db"
    - - "nova-cloud-controller:shared-db"
      - "mysql:shared-db"
    - - "nova-cloud-controller:amqp"
      - "rabbitmq:amqp"
    - - "nova-cloud-controller:image-service"
      - "glance:image-service"
    - - "nova-cloud-controller:identity-service"
      - "keystone:identity-service"
    - - "glance:shared-db"
      - "mysql:shared-db"
    - - "glance:identity-service"
      - "keystone:identity-service"
    - - "cinder:shared-db"
      - "mysql:shared-db"
    - - "cinder:amqp"
      - "rabbitmq:amqp"
    - - "cinder:cinder-volume-service"
      - "nova-cloud-controller:cinder-volume-service"
    - - "cinder:identity-service"
      - "keystone:identity-service"
    - - "neutron-gateway:shared-db"
      - "mysql:shared-db"
    - - "neutron-gateway:amqp"
      - "rabbitmq:amqp"
    - - "neutron-gateway:quantum-network-service"
      - "nova-cloud-controller:quantum-network-service"
    - - "openstack-dashboard:identity-service"
      - "keystone:identity-service"
    - - "nova-compute:shared-db"
      - "mysql:shared-db"
    - - "nova-compute:amqp"
      - "rabbitmq:amqp"
    - - "nova-compute:image-service"
      - "glance:image-service"
    - - "nova-compute:cloud-compute"
      - "nova-cloud-controller:cloud-compute"
    - - "cinder:storage-backend"
      - "cinder-ceph:storage-backend"
    - - "ceph:client"
      - "cinder-ceph:ceph"
    - - "ceph:client"
      - "nova-compute:ceph"
    - - "ceph:client"
      - "glance:ceph"
    - - "ceilometer:identity-service"
      - "keystone:identity-service"
    - - "ceilometer:amqp"
      - "rabbitmq:amqp"
    - - "ceilometer:shared-db"
      - "mongodb:database"
    - - "ceilometer-agent:container"
      - "nova-compute:juju-info"
    - - "ceilometer-agent:ceilometer-service"
      - "ceilometer:ceilometer-service"
    - - "heat:shared-db"
      - "mysql:shared-db"
    - - "heat:identity-service"
      - "keystone:identity-service"
    - - "heat:amqp"
      - "rabbitmq:amqp"
    - - "ceph-radosgw:mon"
      - "ceph:radosgw"
    - - "ceph-radosgw:identity-service"
      - "keystone:identity-service"
    - - "ntp:juju-info"
      - "neutron-gateway:juju-info"
    - - "ntp:juju-info"
      - "ceph:juju-info"
    - - "ntp:juju-info"
      - "keystone:juju-info"
    - - "ntp:juju-info"
      - "nova-compute:juju-info"
    - - "ntp:juju-info"
      - "nova-cloud-controller:juju-info"
    - - "ntp:juju-info"
      - "rabbitmq:juju-info"
    - - "ntp:juju-info"
      - "glance:juju-info"
    - - "ntp:juju-info"
      - "cinder:juju-info"
    - - "ntp:juju-info"
      - "ceph-radosgw:juju-info"
    - - "ntp:juju-info"
      - "openstack-dashboard:juju-info"
    - - "ntp:juju-info"
      - "mysql:juju-info"
    - - "ntp:juju-info"
      - "mongodb:juju-info"
    - - "ntp:juju-info"
      - "ceilometer:juju-info"
    - - "ntp:juju-info"
      - "heat:juju-info"
  series: trusty

:-Dustin

Tuesday, September 9, 2014

Dream a little dream (in a dream within another dream) with me!

What would you say if I told you, that you could continuously upload your own Software-as-a-Service  (SaaS) web apps into an open source Platform-as-a-Service (PaaS) framework, running on top of an open source Infrastructure-as-a-Service (IaaS) cloud, deployed on an open source Metal-as-a-Service provisioning system, autonomically managed by an open source Orchestration-Service… right now, today?

“An idea is resilient. Highly contagious. Once an idea has taken hold of the brain it's almost impossible to eradicate.”

“Now, before you bother telling me it's impossible…”

“No, it's perfectly possible. It's just bloody difficult.” 

Perhaps something like this...

“How could I ever acquire enough detail to make them think this is reality?”

“Don’t you want to take a leap of faith???”
Sure, let's take a look!

Okay, this looks kinda neat, what is it?

This is an open source Java Spring web application, called Spring-Music, deployed as an app, running inside of Linux containers in CloudFoundry


Cloud Foundry?

CloudFoundry is an open source Platform-as-a-Service (PAAS) cloud, deployed into Linux virtual machine instances in OpenStack, by Juju.


OpenStack?

Juju?

OpenStack is an open source Infrastructure-as-a-Service (IAAS) cloud, deployed by Juju and Landscape on top of MAAS.

Juju is an open source Orchestration System that deploys and scales complex services across many public clouds, private clouds, and bare metal servers.

Landscape?

MAAS?

Landscape is a systems management tool that automates software installation, updates, and maintenance in both physical and virtual machines. Oh, and it too is deployed by Juju.

MAAS is an open source bare metal provisioning system, providing a cloud-like API to physical servers. Juju can deploy services to MAAS, as well as public and private clouds.

"Ready for the kick?"

If you recall these concepts of nesting cloud technologies...

These are real technologies, which exist today!

These are Software-as-a-Service  (SaaS) web apps served by an open source Platform-as-a-Service (PaaS) framework, running on top of an open source Infrastructure-as-a-Service (IaaS) cloud, deployed on an open source Metal-as-a-Service provisioning system, managed by an open source Orchestration-Service.

Spring Music, served by CloudFoundry, running on top of OpenStack, deployed on MAAS, managed by Juju and Landscape!

“The smallest seed of an idea can grow…”

Oh, and I won't leave you hanging...you're not dreaming!


:-Dustin

Wednesday, September 3, 2014

OpenStack Austin Meetup, with an Orange Box and Home Brew Beer!



In case you missed the recent Cloud Austin MeetUp, you have another chance to see the Ubuntu Orange Box live and in action here in Austin!

This time, we're at the OpenStack Austin MeetUp, next Wednesday, September 10, 2014, at 6:30pm at Tech Ranch Austin, 9111 Jollyville Rd #100, Austin, TX!

If you join us, you'll witness all of OpenStack Ice House, deployed in minutes to real hardware. Not an all-in-one DevStack; not a minimum viable set of components.  Real, rich, production-quality OpenStack!  Ceilometer, Ceph, Cinder, Glance, Heat, Horizon, Keystone, MongoDB, MySQL, Nova, NTP, Quantum, and RabbitMQ -- intelligently orchestrated and rapidly scaled across 10 physical servers sitting right up front on the podium.  Of course, we'll go under the hood and look at how all of this comes together on the fabulous Ubuntu Orange Box.

And like any good open source software developer, I generally like to make things myself, and share them with others.  In that spirit, I'll also bring a couple of growlers of my own home brewed beer, Ubrewtu ;-)  Free as in beer, of course!
Cheers,Dustin

Friday, August 22, 2014

Call for Testing: Docker 1.0.1 in Ubuntu 14.04 LTS (Trusty)


Docker 1.0.1 is available for testing, in Ubuntu 14.04 LTS!

Docker 1.0.1 has landed in the trusty-proposed archive, which we hope to SRU to trusty-updates very soon.  We would love to have your testing feedback, to ensure both upgrades from Docker 0.9.1, as well as new installs of Docker 1.0.1 behave well, and are of the highest quality you have come to expect from Ubuntu's LTS  (Long Term Stable) releases!  Please file any bugs or issues here.

Moreover, this new version of the Docker package now installs the Docker binary to /usr/bin/docker, rather than /usr/bin/docker.io in previous versions. This should help Ubuntu's Docker package more closely match the wealth of documentation and examples available from our friends upstream.

A big thanks to Paul Tagliamonte, James Page, Nick Stinemates, Tianon Gravi, and Ryan Harper for their help upstream in Debian and in Ubuntu to get this package updated in Trusty!  Also, it's probably worth mentioning that we're targeting Docker 1.1.2 (or perhaps 1.2.0) for Ubuntu 14.10 (Utopic), which will release on October 23, 2014.

Here are a few commands that might help your testing...

Check What Candidate Versions are Available

$ sudo apt-get update
$ apt-cache show docker.io | grep ^Version:

If that shows 0.9.1~dfsg1-2 (as it should), then you need to enable the trusty-proposed pocket.

$ echo "deb http://archive.ubuntu.com/ubuntu/ trusty-proposed universe" | sudo tee -a /etc/apt/sources.list
$ sudo apt-get update
$ apt-cache show docker.io | grep ^Version:

And now you should see the new version, 1.0.1~dfsg1-0ubuntu1~ubuntu0.14.04.1, available (probably in addition to 1.0.1~dfsg1-0ubuntu1~ubuntu0.14.04.1).

Upgrades

Check if you already have Docker installed, using:

$ dpkg -l docker.io

If so, you can simply upgrade.

$ sudo apt-get upgrade

And now, you can check your Docker version:

$ sudo dpkg -l docker.io | grep -m1 ^ii | awk '{print $3}'
0.9.1~dfsg1-2

New Installations

You can simply install the new package with:

$ sudo apt-get install docker.io

And ensure that you're on the latest version with:

$ dpkg -l docker.io | grep -m1 ^ii | awk '{print $3}'
1.0.1~dfsg1-0ubuntu1~ubuntu0.14.04.1

Running Docker

If you're already a Docker user, you probably don't need these instructions.  But in case you're reading this, and trying Docker for the first time, here's the briefest of quick start guides :-)

$ sudo docker pull ubuntu
$ sudo docker run -i -t ubuntu /bin/bash

And now you're running a bash shell inside of an Ubuntu Docker container.  And only bash!

root@1728ffd1d47b:/# ps -ef
UID        PID  PPID  C STIME TTY          TIME CMD
root         1     0  0 13:42 ?        00:00:00 /bin/bash
root         8     1  0 13:43 ?        00:00:00 ps -ef

If you want to do something more interesting in Docker, well, that's whole other post ;-)

:-Dustin

Thursday, August 14, 2014

(Re-)Introducing JeOS -- Just Enough OS, aka Ubuntu Core


Lean.  Agile.  Svelte.  Lithe.  Free.

That's how we roll our operating systems in this modern, bountiful era of broadly deployed virtual machines, densely packed with system containers.

Linux, and more generally free software, is a natural fit in this model where massive scale is the norm.  And particularly Ubuntu (with its solid Debian base), is perfectly suited to this brave new world.

Introduced in Ubuntu 8.04 LTS (Hardy) -- November 19, 2007, in fact -- JeOS (pronounced, "juice") was the first of its kind.  An absolutely bare minimal variant of the Ubuntu Server, tailored to perfection for virtual machines and appliances.  Just enough OS.

Taken aback, I overheard a technical executive at a Fortune 50 company say this week:
"What ever happened to that Ubuntu JeOS thing?  We keep looking at CoreOS and Atomic, but what we really want is just a bare minimal Ubuntu server."
Somehow, somewhere along the line, an important message a got lost.  I hope we can correct that now...

JeOS has been here all along, in fact.  You've been able to deploy a daily, minimal Ubuntu image, all day, every single day for most of the the last decade.  Sure, it changed names to Ubuntu Core along the way, but it's still the same sleek little beloved ubuntu-minimal distribution.

"How minimal?", you ask...

63 MB compressed, to be precise.

Did you get that?

That's 63 MB, including a package management system, with one-line, apt-get access to over 30,000 freely available packages across the Ubuntu universe.

That's pretty darn small.  Much smaller than say, 165 MB or 268 MB (which, to be fair, includes a bit more of an operating system -- much closer to say the standard Ubuntu Cloud Image, which is a 176 MB root tarball, or with kernel at 243 MB).

"How useful could such a small image actually be, in practice?", you might ask...

Ask any Docker user, for starters.  Docker's base Ubuntu image has been downloaded over 775,260 to date.  And this image is built directly from the Ubuntu Core amd64 tarball.

Oh, and guess what else?  Ubuntu Core is available for more than just the amd64 architecture!  It's also available for i386, armhf, arm64, powerpc, and ppc64el.  Which is pretty cool, particularly for embedded systems.

So next time you're looking for just enough operating system, just look to the core.  Ubuntu Core.  There is truly no better starting point ;-)

Enjoy,
:-Dustin