Confusion In The Land Of The Serverless - 90min Version
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Note: This is an expanded (roughly 90min) form of my "Confusion in the land of the serverless". Serverless computing is the hot new thing. Like any hyped technology, it promises a lot. However questions remain around concept and implementation, especially when you start to compare how we’ve built systems in the past, and what serverless offers us now. Is Serverless the future, or just the emperor’s new clothes? This talk will very brie y introduce serverless computing, but will then dive into some of the questions that aren’t always asked in conjunction with this technology. By the end of the talk you should have a firm grasp of what serverless computing really can offer, cut through some of the hype, and get an understanding about where and how you can use it in your own organisations.
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Confusion In The Land Of The Serverless - 90min Version
- 1. Confusion in the land of the serverless Sam Newman
- 4. @samnewman
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- 15. @samnewman http://readwrite.com/2012/10/15/why-the-future-of-software-and-apps-is-serverless/ The phrase “serverless” doesn’t mean servers are no longer involved. It simply means that developers no longer have to think that much about them. Computing resources get used as services without having to manage around physical capacities or limits.
- 21. @samnewman Platform Yay, serverless! So abstract Much PAYG WOW!
- 22. @samnewman Server Server Server Server Platform Yay, serverless! So abstract Much PAYG WOW!
- 23. @samnewman Server Server Server Server Platform Yay, serverless! So abstract Much PAYG WOW! Wat?
- 24. @samnewman
- 26. @samnewman Mike Roberts’ Definition Of Serverless
- 27. @samnewman 1. No management of server hosts or server processes Mike Roberts’ Definition Of Serverless
- 28. @samnewman 1. No management of server hosts or server processes 2. Self auto-scale and auto-provision based on load Mike Roberts’ Definition Of Serverless
- 29. @samnewman 1. No management of server hosts or server processes 2. Self auto-scale and auto-provision based on load 3. Costs based on precise usage Mike Roberts’ Definition Of Serverless
- 30. @samnewman 1. No management of server hosts or server processes 2. Self auto-scale and auto-provision based on load 3. Costs based on precise usage 4. Performance capabilities defined in terms other than host size/count Mike Roberts’ Definition Of Serverless
- 31. @samnewman 1. No management of server hosts or server processes 2. Self auto-scale and auto-provision based on load 3. Costs based on precise usage 4. Performance capabilities defined in terms other than host size/count 5. Implicit high availability Mike Roberts’ Definition Of Serverless
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- 35. @samnewman FAAS
- 36. @samnewman FAAS
- 38. @samnewman
- 39. @samnewman
- 40. @samnewman
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- 44. @samnewman IAAS
- 52. @samnewman *AAS
- 54. @samnewman http://readwrite.com/2012/10/15/why-the-future-of-software-and-apps-is-serverless/ The phrase “serverless” doesn’t mean servers are no longer involved. It simply means that developers no longer have to think that much about them.
- 58. @samnewman
- 59. @samnewman
- 60. @samnewman Risk
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- 67. @samnewman DB
- 72. @samnewman DB Connection Pool Connection pools throttle load And allow for load shedding
- 73. @samnewman DB
- 74. @samnewman DB
- 75. @samnewman DB
- 76. @samnewman DB
- 77. @samnewman DB
- 78. @samnewman
- 79. @samnewman
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- 81. @samnewman
- 82. @samnewman But what about hybrid apps?
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- 84. @samnewman Redis
- 85. @samnewman Redis
- 86. @samnewman Redis
- 87. @samnewman Redis
- 88. @samnewman
- 89. @samnewman Hitting 10K per instance connection limits!
- 98. @samnewman Circuit breakers rely on maintaining per-client state across requests Risk Circuit Breaker
- 100. @samnewman Risk Market Data Throttling & Load shedding middleware?
- 101. @samnewman
- 102. @samnewman Security
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- 104. @samnewman Friends don’t let friends run untrusted code in containers
- 105. @samnewman
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- 107. @samnewman
- 108. @samnewman If your function isn’t running, it’s not there…
- 109. @samnewman If your function isn’t running, it’s not there… …and you’re running in a sandbox anyway…
- 110. @samnewman If your function isn’t running, it’s not there… …and you’re running in a sandbox anyway… Kinda
- 117. @samnewman
- 118. @samnewman Simple idea, painful in practice
- 122. @samnewman resources: Resources: urlRedirectTable: Type: AWS::DynamoDB::Table Properties: TableName: urlRedirectTable AttributeDefinitions: - AttributeName: shortName AttributeType: S KeySchema: - AttributeName: shortName KeyType: HASH ProvisionedThroughput: ReadCapacityUnits: 1 WriteCapacityUnits: 1
- 123. @samnewman resources: Resources: urlRedirectTable: Type: AWS::DynamoDB::Table Properties: TableName: urlRedirectTable AttributeDefinitions: - AttributeName: shortName AttributeType: S KeySchema: - AttributeName: shortName KeyType: HASH ProvisionedThroughput: ReadCapacityUnits: 1 WriteCapacityUnits: 1
- 133. @samnewman serverless framework does it all!
- 134. @samnewman ish
- 136. @samnewman feedback?
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- 139. @samnewman Lock-in?
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- 142. @samnewman Don’t think lock-in, think migration cost
- 145. @samnewman Cost of migration Blob storage
- 146. @samnewman Cost of migration Compute Blob storage
- 147. @samnewman Cost of migration Compute Blob storage Load balancers
- 148. @samnewman Cost of migration Compute Blob storage Load balancers FAAS
- 149. @samnewman Cost of migration Compute Blob storage Load balancers FAAS BAAS
- 150. @samnewman Pay now or pay later
- 153. @samnewman
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- 156. @samnewman provider: name: aws runtime: python3.6 iamRoleStatements: - Effect: Allow Action: - dynamodb:Query - dynamodb:Scan - dynamodb:GetItem - dynamodb:PutItem - dynamodb:UpdateItem - dynamodb:DeleteItem Resource: - { "Fn::GetAtt": ["urlRedirectTable", "Arn" ] }
- 157. @samnewman resources: Resources: urlRedirectTable: Type: AWS::DynamoDB::Table Properties: TableName: urlRedirectTable AttributeDefinitions: - AttributeName: shortName AttributeType: S KeySchema: - AttributeName: shortName KeyType: HASH ProvisionedThroughput: ReadCapacityUnits: 1 WriteCapacityUnits: 1
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- 160. @samnewman service: redirect functions: hello: handler: app.hello events: - http: path: /{shortCode} method: GET - http: path: / method: GET
- 161. @samnewman Leaky?
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- 171. @samnewman Agile
- 174. @samnewman I can’t use that, it’s not #serverless!
- 175. @samnewman “There is No Future with Fewer Servers” - Luke Kanies
- 176. @samnewman
- 178. @samnewman It’s just abstractions… …all the way down