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Flying v. Driving: Myths, fears, and opportunity when going serverless

Flying v. Driving: Myths, fears, and opportunity when going serverless

Going serverless is a lot like deciding to fly instead of driving. Flying is routinely safer than driving to your destination but requires a high level of trust in your airline and many are still scared. We’ll explore going serverless by confronting fears and examining it’s new issues.

DevOpsDays denver 2018: https://youtu.be/I1dqiokgPfw

Tom McLaughlin

April 20, 2018
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  1. @tmclaughbos SERVERLESSOPS THIS ISSUES I WORRY ABOUT WITH SERVERS ▸

    Are we under or over sized? ▸ Do we have enough CPU, RAM, disk? ▸ Is every necessary service on the host running? ▸ Are we all up to date with OS patching? ▸ Is this sysctl or config value set? ▸ Are we on the right version? I think that was fixed two releases ago.
  2. @tmclaughbos SERVERLESSOPS THIS ISSUES I WORRY ABOUT WITH SERVERLESS ▸

    Is the application responsive? ▸ Are application requests returned in a timely manner? ▸ What do application error rates look like? ▸ How do we handle application traffic spikes? ▸ How complex of a system have we built?
  3. @tmclaughbos SERVERLESSOPS ACCIDENTS AND FAILURE WHEN SERVERLESS ▸ AWS is

    probably better at the low-level undifferentiated work than you. ▸ Less control also means less things you can break. ▸ This frees you to worry about issues higher up the stack.
  4. @tmclaughbos SERVERLESSOPS LAMBDA VS. EC2 COSTS (THAT WE TELL OURSELVES)

    ‣ Instance: 1 x t2.nano Total: $4.25/month ‣ Requests: 2,678,400 (1rps) ‣ Duration: 100ms ‣ Memory: 128MB Total: $0.55/month
  5. @tmclaughbos SERVERLESSOPS FLIGHT V. DRIVING TO DENVER ((2000 miles /

    36mpg) * $2.66/gal) * 2 Total: $296 round trip
  6. AWS SAYS COMPANY XYZ SAVED 84% BY MOVING TO AWS

    LAMBDA… https://aws.amazon.com/solutions/case-studies/bustle/
  7. @tmclaughbos SERVERLESSOPS ACTUAL TRAVEL COSTS ‣ Ticket: $385 ‣ Lyft:

    ‣ Airport <—> Home: $10 x 2 ‣ Airport <—> Hotel: $29 x 2 Total: $463 ‣ Gas: $443 ‣ Hotel: $152 (Cleveland: $43 + Minneapolis: $50 + Billings: $59) ‣ Meals ‣ Breakfast: $22.50 ($7.50 *3) ‣ Lunch: $30 ($7.50 * 4) ‣ Dinner: $22.50 ($7.50 * 3) ‣ Coffee: $30 ($3.75 * 8) Total: $700
  8. @tmclaughbos SERVERLESSOPS LAMBDA VS. EC2 COSTS (ACTUAL) ‣ Instance: 2

    x m4.large ($146.40) ‣ SaaS services: ‣ Logging: $20 ($10 * 2) ‣ Security: $20 ($10 * 2) Total: $186.40/month ‣ Invocations: 2,678,400 ($0.557 - 1rps) ‣ Duration: 100ms ‣ Memory: 128MB ‣ Requests: 2,678,400 ($0.535) Total: $1.09/month
  9. @tmclaughbos SERVERLESSOPS LAMBDA VS. EC2 COSTS (ACTUAL) ‣ Instance: 2

    x m4.large ($146.40) ‣ SaaS services: ‣ Logging: $20 ($10 * 2) ‣ Security: $20 ($10 * 2) Total: $186.40/month ‣ Invocations: 267,840,000 ($55.71 - 100rps) ‣ Duration: 100ms ‣ Memory: 128MB ‣ Requests: 267,840,000 ($53.56) Total: $109.27/month
  10. @tmclaughbos SERVERLESSOPS LAMBDA VS. EC2 COSTS (ACTUAL) ‣ Instance: 2

    x m4.large ($146.40) ‣ SaaS services: ‣ Logging: $20 ($10 * 2) ‣ Security: $20 ($10 * 2) Total: $186.40/month ‣ Invocations: 267,840,000 ($223.38 - 100rps) ‣ Duration: 200ms ‣ Memory: 256MB ‣ Requests: 267,840,000 ($53.56) Total: $276.93/month
  11. @tmclaughbos SERVERLESSOPS BOTH OF THESE CAN BE TRUE ‣ “Lambda

    costs ~2X versus running a service on EC2.” ‣ “Lambda saved us 85% on our bill.”
  12. @tmclaughbos SERVERLESSOPS THINGS YOU CAN DO WHILE FLYING ▸ Read

    ▸ Watch movies ▸ Deliver Twitter hottakes ▸ Email ▸ Code ▸ Write blog post ▸ Write a conference presentation
  13. I WANT THE FOCUS OF MY TRIP TO BE MY

    DESTINATION, NOT HOW I GOT THERE.
  14. SERVERLESSOPS @TMCLAUGHBOS WHAT I DO WITH SERVERS ‣ Managing a

    host deployment system ‣ Managing an app deployment system ‣ Config management ‣ Monitoring host state & metrics ‣ Monitoring app state & metrics ‣ Patching hosts ‣ Monitoring who logged in ‣ Scaling services
  15. SERVERLESSOPS @TMCLAUGHBOS WHAT I DO WITH SERVERLESS ‣ Managing a

    host deployment system ‣ Managing an app deployment system ‣ Config management ‣ Monitoring host state & metrics ‣ Monitoring app state & metrics ‣ Patching hosts apps ‣ Monitoring who logged in resource access ‣ Scaling services systems