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class: title

Tell me and I forget.
Teach me and I remember.
Involve me and I learn.

Misattributed to Benjamin Franklin

(Probably inspired by Chinese Confucian philosopher Xunzi)

Hands-on sections

  • There will be a lot of examples and demos

  • We are going to build, ship, and run containers (and sometimes, clusters!)

  • If you want, you can run all the examples and demos in your environment

    (but you don't have to; it's up to you!)

  • All hands-on sections are clearly identified, like the gray rectangle below

.lab[

  • This is a command that we're gonna run: 
    echo hello world

]

class: in-person

Where are we going to run our containers?

class: in-person, pic

You get a cluster

If you're attending a live training or workshop

  • Each person gets a private lab environment

    (depending on the scenario, this will be one VM, one cluster, multiple clusters...)

  • The instructor will tell you how to connect to your environment

  • Your lab environments will be available for the duration of the workshop

    (check with your instructor to know exactly when they'll be shutdown)

Running your own lab environments

  • If you are following a self-paced course...

  • Or watching a replay of a recorded course...

  • ...You will need to set up a local environment for the labs

  • If you want to deliver your own training or workshop:

    • deployment scripts are available in the prepare-labs directory

    • you can use them to automatically deploy many lab environments

    • they support many different infrastructure providers

class: in-person

Why don't we run containers locally?

  • Installing this stuff can be hard on some machines

    (32 bits CPU or OS... Laptops without administrator access... etc.)

  • "The whole team downloaded all these container images from the WiFi!
    ... and it went great!"     (Literally no-one ever)

  • All you need is a computer (or even a phone or tablet!), with:

    • an Internet connection

    • a web browser

    • an SSH client

class: in-person

SSH clients

class: in-person, extra-details

What is this Mosh thing?

You don't have to use Mosh or even know about it to follow along.
We're just telling you about it because some of us think it's cool!

  • Mosh is "the mobile shell"

  • It is essentially SSH over UDP, with roaming features

  • It retransmits packets quickly, so it works great even on lossy connections

    (Like hotel or conference WiFi)

  • It has intelligent local echo, so it works great even in high-latency connections

    (Like hotel or conference WiFi)

  • It supports transparent roaming when your client IP address changes

    (Like when you hop from hotel to conference WiFi)

class: in-person, extra-details

Using Mosh

  • To install it: (apt|yum|brew) install mosh

  • It has been pre-installed on the VMs that we are using

  • To connect to a remote machine: mosh user@host

    (It is going to establish an SSH connection, then hand off to UDP)

  • It requires UDP ports to be open

    (By default, it uses a UDP port between 60000 and 61000)