[CentralOH] 2014-09-29 會議 Scribbles 落書/惡文?

[Eric Floehr]

And so it came to pass that from from that day hence he should be called
"Ella Flower".

A couple of things I didn't get to in my Ansible talk... you can have basic
"for" loops in the YAML files, for example:

  - name: Install packages for all systems
    yum: name={{ item }} state=present
    with_items:
      - tmux
      - iotop
      - htop
      - vim-enhanced
      - zip
      - unzip
      - wget
      - lsof
      - bash-completion
      - dstat
      - ntp
      - dos2unix

And because Ansible understands state, you can add "handlers" that only get
called if the task is actually run/updated. So for example, in the below,
if the ssh config file is changed on the system, it will restart ssh:

tasks:
  - name: configure ssh to increase security
    copy: src=files/sshd_config dest=/etc/ssh/sshd_config owner=root
group=root mode=600 backup=yes
    notify:
      restart sshd

... other tasks ...

  handlers:
  - name: restart sshd
    service: name=sshd state=restarted

You can get pretty complex, this is just a simple example.

And yes, tawodi can fly.


On Wed, Oct 8, 2014 at 9:13 PM, <jep200404 at columbus.rr.com> wrote:

> Thanks again to Pillar and Ben Rogers for hosting us at The Forge
>
> Ben Rogers recommends
>     Test Driven Development (By Example???) by Kent Beck
> likes Microsoft Natural Ergonomic Keyboard 4000
> pair programming
> One might write test, while other writes code,
> then swap duties for next module
>
> wp:Microsoft_Natural_keyboard#Natural_Ergonomic_Keyboard_4000
> close edge of keyboard is high, far edge of keyboard is low
> '6' on left bank frustrates traditionally trained touch-typists.
> http://blog.codinghorror.com/keyboarding-microsoft-natural-ergonomic-4000/
>
>     It's like, how much more black could this be? and the answer is none.
>     None more black.
>
>     (so get a Ninja keyboard)
>
> wp:Happy Hacking Keyboard
> wp:Model M keyboard
> http://blog.codinghorror.com/the-code-keyboard/
> http://blog.codinghorror.com/the-keyboard-cult/
>
>
> There were a number of small presentations.
> I like this way of doing meetings.
>
> Jim Prior gave trivial presentation
> echo `echo "print $i + 1" | python`
> # How to do above with awk instead of python?
>     awk "BEGIN {print $i + 1}"
>     echo "$i" | awk '{print $1 + 1}'
> http://lists.colug.net/pipermail/colug-432/2014-September/003357.html
>
>
> http://www.columbusunderground.com/forums/topic/5xnw-pizza-crawl-100214-6pm-starting-at-the-ohio-tap-room
> http://theohiotaproom.com/
> wp:Beer_bottle#Growler
> Andrew Kubera
> Growler web framework uses asyncio (URL???)
> not https://github.com/miyagawa/github-growler
> not Boeing EA-18G Growler
>
> http://www.catb.org/~esr/writings/cathedral-bazaar/cathedral-bazaar/ar01s04.html
> wp:Release early, release often
> show us your code. What is URL for it?
>
> Jason Green
> colorized prompts (URL for such?, perhaps on https://github.com/gJigsaw??
> ?)
> Indicating success or failure of previous command in color of following
> prompt
> is cool. That's something I'd not heard of before.
> Jason, please post your command prompt code.
>
> Melvyn Ian Drag
> optimzing Python code for matrix multiplication
> wp:Row-major order
> wp:colum-major order
> cache friendly 32 KB pages
> partial differential equations
>     use matrix multiplication to solve them
>
> graphics transformation can use matrix multiplication
>     wp:Rotation formalisms in three dimensions
>     xrandr transform
>     (see 'xrandr --output VGA1 --transform ' commands in
>     https://mail.python.org/pipermail/centraloh/2012-July/001336.html)
>
> numpy arrays can be either
> declaration can specify either row-major or column-major order
> order: {'C', 'F'}
> 'C': c-like (row-major order)
> 'F': fortran-like (column-major order)
> see ">>> c = b.reshape(2,3,order='F')"
> in
> http://stackoverflow.com/questions/20341614/numpy-array-row-major-and-column-major
>
> Eric Floehr
> Tonight's presentation is brought to you by the letter A (for Ansible).
> wp:Ursula K. Le Guin
> wp:Ansible
> wp:Ansible (software)
> https://pypi.python.org/pypi/ansible
> setting up multiple machines
> chef
> puppet
> fabric
> paramiko
> ansible
> set up template in a virtual environment
> mkvirtualenv ansible-demo
> # http://virtualenvwrapper.readthedocs.org/en/latest/command_ref.html
> pip install ansible-demo
>     jinja2
> vi host (list of machine to configure)
> Centos 6 virtual machine
> base centos OS install
> ansible all -m ping -u root --ask-pass
> ansible all -m command -a "ls -l" -u root --ask-pass
> yaml file playbook
> vi base
> ---
> - name: Apply common configuration
>   hosts: all
>   tasks:
>   -name: Update to latest software
>    yum: name=* state=latest
>
>   - name: Install packages required by Ansible
>     yum: name=libselinux-python state=present
>
>   - name: Add my user
>     user: name=eflower comment="Ella Flower" groups=wheel append=yes
> password=correcthorsebatterystaple
>
>   - name: Generate ssh keys
>     authorized_key: user=eflower generate_ssh_keys=yes ssh_key_bits=2048
>
>   - name: Copy over my public key
>     authorized_key: user=eflower key="{{ lookup('file',
> '/home/eflower/.ssh/id_rsa.pub') }}"
>
>   - name: Tighten ssh
> # install some favorite packages
>
> ansible-playbook base.yml -u root --ask-pass
>
> mkpasswd --method=SHA512
> # What about correct horse battery staple?
> If tawodi can fly.
>
> wp:Adventure game
> https://pypi.python.org/pypi/adventure
> written by Brandon Rhodes to learn Python 3
> https://github.com/brandon-rhodes/python-adventure
>
> terminal program that emulates green phosphor
> https://github.com/Swordfish90/cool-retro-term
> wp:https://en.wikipedia.org/wiki/Swordfishtrombones
> wp:Tom Waits
> wp:Rumble Fish
> http://www.columbusitalianfestival.com/
>
> How are Rumble Fish and The Wizard of Oz (1939 film) alike?
> wp:The Wizard of Oz (1939 film)
> wp:The Graduate
>
> coursera
> windows
>     stock values
>     pandas
>     Python for Data Analysis by Wes McKinney
>
> Peter Carswell
> Panda3D
> michael dawson
>     making games
>
> http://www.amazon.com/Python-Programming-Absolute-Beginner-Edition/dp/1435455002
>
> wp:Fiat 124 Sport Spider
> wp:Ford Pantera
>
> wp:Neodymium
> wp:Mountain Pass rare earth mine
> wp:Long Now Foundation
> wp:Tesla Motors
> If Tesla Motors were to cease operations,
> how long could Tesla car owners operate their cars?
>
> VGA worked better than usual
>
> continued at Brazenhead
> http://www.hdrestaurants.com/brazenhead/5thavenue/index.htm
>
> wp:tcsh
>
> wp:Comparison of command shells
>
> wp:Common_pawpaw
> wp:Osage_orange
> hand boils in LHC (well maybe not)
> wp:LHC
> wp:Supercritical fluid
> wp:Critical point (thermodynamics)
> wp:File:Phase-diag2.svg
> wp:Pressure volume diagram
> wp:Triple point
> wp:Space_suit#Exposure_to_space_without_a_space_suit
>
> wp:Magic_number_(programming)#Unnamed_numerical_constants
> wp:Asimina triloba
> wp:Watermelon Man (composition)
> _______________________________________________
> CentralOH mailing list
> CentralOH at python.org
> https://mail.python.org/mailman/listinfo/centraloh
>
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