Kubernetes, behind the buzzwords

Many articles have been written about Kubernetes but what is it really? This talk presented at January's Squamish Technology meetup took a look at what Kubernetes is, and some of the building blocks behind K8s.

Transcript

1. B E H I N D T H E K U B E R N E T E S B U Z Z W O R D S
2. W H AT I S K U B E R N E T E S ?
3. W H AT I S K U B E R N E T E S ? K U B E R N E T E S I S A N O P E N - S O U R C E C O N TA I N E R - O R C H E S T R AT O R
4. W H AT I S A C O N TA I N E R ?
5. W H AT I S A C O N TA I N E R ? A N O B J E C T T H AT C A N B E U S E D T O H O L D O R T R A N S P O R T S O M E T H I N G
6. W H AT I S A C O N TA I N E R ? A N O B J E C T T H AT C A N B E U S E D T O H O L D O R T R A N S P O R T S O M E T H I N G
7. W H AT I S K U B E R N E T E S ? K U B E R N E T E S I S A N O P E N - S O U R C E O R C H E S T R AT O R O F R E C E P TA C L E S T H AT C A N C O N TA I N O B J E C T S
8. W H AT I S A N O R C H E S T R AT O R ?
9. W H AT I S A N O R C H E S T R AT O R ? A N O R C H E S T R AT O R I S A T R A I N E D M U S I C A L P R O F E S S I O N A L W H O A S S I G N S I N S T R U M E N T S F R O M A N O R C H E S T R A O R O T H E R M U S I C A L E N S E M B L E T O A P I E C E O F M U S I C W R I T T E N B Y A C O M P O S E R , O R W H O A D A P T S M U S I C C O M P O S E D F O R A N O T H E R M E D I U M F O R A N O R C H E S T R A .
10. W H AT I S A N O R C H E S T R AT O R ? A N O R C H E S T R AT O R I S A T R A I N E D M U S I C A L P R O F E S S I O N A L W H O A S S I G N S I N S T R U M E N T S F R O M A N O R C H E S T R A O R O T H E R M U S I C A L E N S E M B L E T O A P I E C E O F M U S I C W R I T T E N B Y A C O M P O S E R , O R W H O A D A P T S M U S I C C O M P O S E D F O R A N O T H E R M E D I U M F O R A N O R C H E S T R A .
11. W H AT I S K U B E R N E T E S ? K U B E R N E T E S I S A N O P E N - S O U R C E T R A I N E D M U S I C A L P R O F E S S I O N A L W H O A S S I G N S R E C E P TA C L E S T H AT C A N C O N TA I N O B J E C T S T O M E M B E R S O F A N O R C H E S T R A
13. W H AT I S K U B E R N E T E S ?
14. W H AT I S K U B E R N E T E S ? K U B E R N E T E S I S A N O P E N S O U R C E S Y S T E M F O R M A N A G I N G C O N TA I N E R I Z E D A P P L I C AT I O N S A C R O S S M U LT I P L E H O S T S , P R O V I D I N G B A S I C M E C H A N I S M S F O R D E P L O Y M E N T, M A I N T E N A N C E , A N D S C A L I N G O F A P P L I C AT I O N S .
15. K U B E R N E T E S • released in June 2014 by Google, based on internal system Borg • strong community support and active development • industry-wide adoption • rich eco-system
16. W H O U S E S K U B E R N E T E S ?
17. G E T T I N G S TA R T E D brew install cask minikube brew install kubernetes-cli minikube start
18. D E M O
19. S I D E N O T E S k8s = a numeronym (number-based word) of kubernetes. Others include: i18n, o11y, l10n
20. W H AT H A P P E N E D L A P T O P M I N I K U B E V M ( K 8 S M A S T E R ) D O C K E R K 8 S A P I S E R V E R K 8 S S C H E D U L E R K 8 S C O R E D N S E T C D
21. K 8 S B A S I C S • Node • Pod • Deployment • Service
22. K 8 S B A S I C S • Node - represents a worker capable of running containers • Pod - is the unit of work in kubernetes. A pod represents an application via one or more containers • Deployment - allows users to deploy pods and a policy for rolling upgrades to those applications • Service - an abstraction to specify policy and method of accessing pods
23. K 8 S B A S I C S • Node - represents a worker capable of running containers • Pod - is the unit of work in kubernetes. A pod represents an application via one or more containers • Deployment - allows users to deploy pods and a policy for rolling upgrades to those applications • Service - an abstraction to specify policy and method of accessing pods
24. K 8 S B A S I C S • Node - represents a worker capable of running containers • Pod - is the unit of work in kubernetes. A pod represents an application via one or more containers • Deployment - allows users to deploy pods and a policy for rolling upgrades to those pods • Service - an abstraction to specify policy and method of accessing pods
25. K 8 S B A S I C S • Node - represents a worker capable of running containers • Pod - is the unit of work in kubernetes. A pod represents an application via one or more containers • Deployment - allows users to deploy pods and a policy for rolling upgrades to those pods • Service - an abstraction to specify policy and method of accessing pods
26. S I D E N O T E S alias k=kubectl # this will save you LOTS of typing
27. D E M O # 2 T E S T I N G T H E D E M O G O D S
28. W H AT H A P P E N E D M I N I K U B E V M ( K 8 S M A S T E R ) P O D G O A L S - P O D
29. W H AT H A P P E N E D M I N I K U B E V M ( K 8 S M A S T E R ) P O D G O A L S - P O D P O D G O A L S - P O D D E P L O Y M E N T
30. W H AT H A P P E N E D M I N I K U B E V M ( K 8 S M A S T E R ) P O D G O A L S - P O D P O D G O A L S - P O D D E P L O Y M E N T S E R V I C E
31. M I N I K U B E V M ( K 8 S M A S T E R ) D E P L O Y M E N T W H AT H A P P E N E D P O D G O A L S - P O D : 2 0 1 8 P O D G O A L S - P O D : 2 0 1 8 P O D G O A L S - P O D : 2 0 1 9
32. M I N I K U B E V M ( K 8 S M A S T E R ) D E P L O Y M E N T W H AT H A P P E N E D P O D G O A L S - P O D : 2 0 1 8 P O D G O A L S - P O D : 2 0 1 8 P O D G O A L S - P O D : 2 0 1 9
33. M I N I K U B E V M ( K 8 S M A S T E R ) D E P L O Y M E N T W H AT H A P P E N E D P O D G O A L S - P O D : 2 0 1 8 P O D G O A L S - P O D : 2 0 1 9 P O D G O A L S - P O D : 2 0 1 9
34. M I N I K U B E V M ( K 8 S M A S T E R ) D E P L O Y M E N T W H AT H A P P E N E D P O D G O A L S - P O D : 2 0 1 8 P O D G O A L S - P O D : 2 0 1 9 P O D G O A L S - P O D : 2 0 1 9
35. S C R AT C H I N G T H E S U R FA C E • ReplicaSet • DaemonSet • Job • Volume • Namespace
36. S O M E B E N E F I T S • declarative application deployment • manages deployments across a cluster of machines • cloud agnostic • extensible
37. A LT E R N AT I V E S • Docker swarm • Hashicorp Nomad • OpenStack
38. M A N A G E D K U B E R N E T E S
39. Q U E S T I O N S ? A L E X B O T E N @ C O D E B O T E N