Database DevOpsanti-patterns

DLM ConsultantsAlex Yates

(How to screw up your ability to deliver schema changes in 15

simple steps)DLM Consultants

Alex Yates

workingwithdevs.comalex.yates@dlmconsultants.c

om

DLM ConsultantsAlex Yates

@_AlexYates_ | #sqlinthecity

@_AlexYates_#sqlinthecity

“10,000 releases per day”

Alistair Hann, SkyScanner

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Step 1: Fear every change

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Step 2: Wait until you are already screwed

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Step 3: Build a tangled web of databases

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Step 4: Customize each production instance

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Step 5: Don’t use a standard source control process

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Step 6: Impose new process on underlings

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Step 7: Don’t provide any training

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Step 8: Use the wrong model/migration approach

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“There's nothing more reliable than keeping track of exactly the scripts you

intend to run, and running them, without trying to compare state and

guess.”

Paul Stovell, Octopus Deploy

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“As soon as you have multiple changes on a single aspect of an object, ordering and the ability to detect which change needs

to be made gets very complicated.”

Gert Drapers, built Data Dude

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“Small teams who make few changes and have few programmable objects

are well suited to migrations.

Otherwise declarative models scale better.”

Alex Yates, DLM Consultants

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Step 8: Use the wrong model/migration approach

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Step 9: Hot-fix all the problems in production

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Step 10: Don’t use branching or tagging

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Step 11: Use branches to solve every problem

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Step 12: Re-invent the wheel

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Step 13: Have a functional stand-off

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Step 14: Create a DevOps teams/rolehttp://devopstopologies.com/

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Step 15: Give up. (You are too big, small, broken, not broken, greenfield, brownfield, agile, waterfall, complicated, simple, inexperienced, experienced, regulated or unregulated anyway. It’ll never work.)

@_AlexYates_#sqlinthecity

http://devopstopologies.com

Fear every changeWait until you are already screwedBuild a tangled web of databases

Customize each production instanceDon’t use a standard source control process

Impose new process on underlingsDon’t provide any training

Use the wrong model/migration approachHot-fix all the problems in production

Don’t use branching or taggingUse branches to solve every problem

Re-invent the wheelHave a functional stand-offCreate a DevOps teams/role

Give up.

DON’T…

http://devopstopologies.com

Embrace change, carefullyAdopt DevOps early

Avoid cross-database dependenciesStandardize production instances

Use a standard source control processInvolve everyoneProvide training

Use the right model/migration approachAvoid production hotfixes

Use branching when appropriateUse branches sparingly

Use industry standard solutionsWork collaboratively across silos

Structure for successPersevere.

DO

E: alex.yates@dlmconsultants.comT: @_AlexYates_W: www.dlmconsultants.com

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