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All The World’s A Staging Server

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The Post-Agile World

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Four Elements of Software

Development style (Definition of done)
Source control
Testing
Deployment

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Tinkertoys and Microservices

Full testing is impossible
Decouple
Test behavior and endpoints

Testing

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Every Scar a Story

Agile development works poorly for microservices
Branches are a habit, not a mandate
Question your assumptions

Source Control

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All the World’s a Staging Server

Kill staging
Test in production
Launch darkly
Go faster, be safer

Deployment

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Everything Is A Little Bit Broken

Effort cannot be eliminated, only moved
Development is not perfect
Anticipate failure, celebrate success

Development

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Deployment is

NOT

Release

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We are all testing in production.

Some of us do it on purpose.

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Sad Stories of the Death of Kings

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Staging is a Lie

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From Rumour's tongues�They bring smooth comforts false, worse than true wrongs.

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Green is Expensive

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Coder.com

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Production is Unknowable

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That undiscovered country from whose bourne no traveller returns

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Yet cheerily!

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Production Can Contain Superposition

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If we shadows have offended, think but this and all is mended

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Lie ten nights awake carving the fashion of a new doublet

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You Can Hide in the Dark

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Nor heaven peep through the blanket of the dark�To cry “Hold, hold!”

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The idea of dark launching has been around for a long time. Sometimes we mean “trying it out for a select audience” and sometimes it means “splitting requests and sending some against a new service” and sometimes it means “opening but with no fanfare. Restaurants call this a soft open, because it’s remarkably difficult to troubleshoot a system when it is operating at peak capacity. It’s better to get your feet under you without needing to deal with the full number of people.

For software, the same thing is true. It’s far easier and cheaper to fix a problem that only appeared to a few people than to do fixes or apologies if lots of people were affected. Similarly, testing your system resilience by starting with a small part of your audience is going to be much safer than trying to start everything at once.

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Wisely and slow; they stumble that run fast

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Integration Testing Takes Many Forms

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Our stern alarums chang’d to merry meetings

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But What About….

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Testing

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The play’s the thing, wherein I’ll catch the conscience of the king

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Bad Ideas?

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I know a hawk from a handsaw

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Essential Cutovers

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There is a tide in the affairs of men,

Which, taken at the flood, leads on to fortune;

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Charge

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Launch Darkly

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Branch By Abstraction

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Test in Production

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tl;rt

Too long;

read twitter

Kill staging, because it’s a plausible lie.

Test in production.

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launchdarkly.com/heidi

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Shakespeare quotes I didn’t put in

I didn’t put in all the Shakespeare quotes I thought of that had to do with feature flags and production. But you can find them in the speaker notes below!

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As You Like It, Act II, Scene VII [All the world’s a stage]�William Shakespeare, 1564 - 1616��Jaques to Duke Senior�� All the world’s a stage,�And all the men and women merely players;�They have their exits and their entrances,�And one man in his time plays many parts,

———————-

Act V, Scene i�Puck's Monologue��PUCK�If we shadows have offended,�Think but this, and all is mended,�That you have but slumber'd here�While these visions did appear.�And this weak and idle theme,�No more yielding but a dream,�Gentles, do not reprehend:�if you pardon, we will mend:�And, as I am an honest Puck,�If we have unearned luck�Now to 'scape the serpent's tongue,�We will make amends ere long;�Else the Puck a liar call;�So, good night unto you all.�Give me your hands, if we be friends,�And Robin shall restore amends.

———————-

The spirit that I have seen�May be a devil, and the devil hath power�T' assume a pleasing shape, yea, and perhaps�Out of my weakness and my melancholy,�As he is very potent with such spirits,�Abuses me to damn me. I'll have grounds�More relative than this. The play's the thing�Wherein I'll catch the conscience of the king.�Read more at http://www.monologuearchive.com/s/shakespeare_002.html#I6rKARTLi3DxBKov.99

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There is a tide in the affairs of men,

225Which, taken at the flood, leads on to fortune;

Omitted, all the voyage of their life

Is bound in shallows and in miseries.

On such a full sea are we now afloat,

And we must take the current when it serves

230Or lose our ventures.

------------------------

Now is the winter of our discontent

Made glorious summer by this sun of York;

And all the clouds that lour’d upon our house

In the deep bosom of the ocean buried.

Now are our brows bound with victorious wreaths;

Our bruised arms hung up for monuments;

Our stern alarums chang’d to merry meetings,

Our dreadful marches to delightful measures.

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Richard II, 3.2

Richard II:

For God's sake, let us sit upon the ground

And tell sad stories of the death of kings;

How some have been deposed; some slain in war,

Some haunted by the ghosts they have deposed;

Some poison'd by their wives: some sleeping kill'd;

BISHOP OF CARLISLE

My lord, wise men ne'er sit and wail their woes,

But presently prevent the ways to wail.

To fear the foe, since fear oppresseth strength,

Gives in your weakness strength unto your foe,

And so your follies fight against yourself.

Fear and be slain; no worse can come to fight:

And fight and die is death destroying death;

Where fearing dying pays death servile breath.

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Ariel’s Song

Full fathom five thy father lies;

Of his bones are coral made;

Those are pearls that were his eyes:

Nothing of him that doth fade,

But doth suffer a sea-change

Into something rich and strange.

Sea-nymphs hourly ring his knell:

Ding-dong.

Hark! now I hear them—Ding-dong, bell.

—————-

Henry IV Pt 2, Prologue

Enter RUMOUR, painted full of tongues��Rumour. Open your ears; for which of you will stop �The vent of hearing when loud Rumour speaks? �I, from the orient to the drooping west, �Making the wind my post-horse, still unfold 5�The acts commenced on this ball of earth. �Upon my tongues continual slanders ride, �The which in every language I pronounce, �Stuffing the ears of men with false reports. �I speak of peace while covert emnity, 10�Under the smile of safety, wounds the world; �And who but Rumour, who but only I, �Make fearful musters and prepar'd defence, �Whiles the big year, swoln with some other grief, �Is thought with child by the stern tyrant war, 15�And no such matter? Rumour is a pipe �Blown by surmises, jealousies, conjectures, �And of so easy and so plain a stop �That the blunt monster with uncounted heads, �The still-discordant wav'ring multitude, 20�Can play upon it. But what need I thus �My well-known body to anatomize �Among my household? Why is Rumour here?

….

The posts come tiring on, �And not a man of them brings other news �Than they have learnt of me. From Rumour's tongues 40�They bring smooth comforts false, worse than true wrongs.