JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

1 of 174

http://people.hofstra.edu/geotrans/eng/ch3en/conc3en/table_advantageschallengescont.html

18.1

Operating System Concepts – 10^th Edition

2 of 174

What is Docker?

18.2

Operating System Concepts – 10^th Edition

3 of 174

What is Docker?

•

Open source project and company

18.3

Operating System Concepts – 10^th Edition

4 of 174

What is Docker?

•

Open source project and company

•

Used to create containers for software applications

18.4

Operating System Concepts – 10^th Edition

5 of 174

What is Docker?

•

Open source project and company

•

Used to create containers for software applications

•

Package Once Deploy Anywhere (PODA)

18.5

Operating System Concepts – 10^th Edition

6 of 174

Advantages

18.6

Operating System Concepts – 10^th Edition

7 of 174

Advantages

•

Isolation

18.7

Operating System Concepts – 10^th Edition

8 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

18.8

Operating System Concepts – 10^th Edition

9 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

•

Snapshotting - Upgrade/downgrade application versions

18.9

Operating System Concepts – 10^th Edition

10 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

•

Snapshotting - Upgrade/downgrade application versions

•

Security sandbox

18.10

Operating System Concepts – 10^th Edition

11 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

•

Snapshotting - Upgrade/downgrade application versions

•

Security sandbox

•

Limit resource usage

18.11

Operating System Concepts – 10^th Edition

12 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

•

Snapshotting - Upgrade/downgrade application versions

•

Security sandbox

•

Limit resource usage

•

Lightweight footprint and minimal overhead

18.12

Operating System Concepts – 10^th Edition

13 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

•

Snapshotting - Upgrade/downgrade application versions

•

Security sandbox

•

Limit resource usage

•

Lightweight footprint and minimal overhead

•

Simplified dependency

18.13

Operating System Concepts – 10^th Edition

14 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

•

Snapshotting - Upgrade/downgrade application versions

•

Security sandbox

•

Limit resource usage

•

Lightweight footprint and minimal overhead

•

Simplified dependency

•

Sharing

18.14

Operating System Concepts – 10^th Edition

15 of 174

Advantages

•

Isolation

•

Portability - “it works on my machine”

•

Snapshotting - Upgrade/downgrade application versions

•

Security sandbox

•

Limit resource usage

•

Lightweight footprint and minimal overhead

•

Simplified dependency

•

Sharing

•

Faster Deployments

18.15

Operating System Concepts – 10^th Edition

16 of 174

Underlying Technology

18.16

Operating System Concepts – 10^th Edition

17 of 174

Underlying Technology

•

Written in Go

18.17

Operating System Concepts – 10^th Edition

18 of 174

Underlying Technology

•

Written in Go

•

Uses several Linux features

18.18

Operating System Concepts – 10^th Edition

19 of 174

Underlying Technology

•

Written in Go

•

Uses several Linux features

Namespaces to provide isolation

18.19

Operating System Concepts – 10^th Edition

20 of 174

Underlying Technology

•

Written in Go

•

Uses several Linux features

Namespaces to provide isolation

Control groups to share/limit hardware resources

18.20

Operating System Concepts – 10^th Edition

21 of 174

Underlying Technology

•

Written in Go

•

Uses several Linux features

Namespaces to provide isolation

Control groups to share/limit hardware resources

Union File System makes it light and fast

18.21

Operating System Concepts – 10^th Edition

22 of 174

Underlying Technology

•

Written in Go

•

Uses several Linux features

Namespaces to provide isolation

Control groups to share/limit hardware resources

Union File System makes it light and fast

libcontainer defines container format

18.22

Operating System Concepts – 10^th Edition

23 of 174

Is it only Linux?

18.23

Operating System Concepts – 10^th Edition

24 of 174

Is it only Linux?

•

Natively supported in Linux

18.24

Operating System Concepts – 10^th Edition

25 of 174

Is it only Linux?

•

Natively supported in Linux

•

Can be installed on Mac or Windows using

boot2docker

18.25

Operating System Concepts – 10^th Edition

26 of 174

Is it only Linux?

•

Natively supported in Linux

•

Can be installed on Mac or Windows using

boot2docker

Tiny Core Linux VM

18.26

Operating System Concepts – 10^th Edition

27 of 174

18.27

Operating System Concepts – 10^th Edition

28 of 174

18.28

Operating System Concepts – 10^th Edition

29 of 174

Docker Workflow

Docker Hub

Docker Host

Daemon

Docker Client

18.29

Operating System Concepts – 10^th Edition

30 of 174

Docker Workflow

Docker Hub

Docker Host

Daemon

Docker Client

docker run <image> docker …

18.30

Operating System Concepts – 10^th Edition

31 of 174

Docker Workflow

Docker Hub

Docker Host

Daemon

Docker Client

docker run <image> docker …

18.31

Operating System Concepts – 10^th Edition

32 of 174

Docker Workflow

Docker Hub

Image 1

Image 2

Image 3

Image M

Docker Host

Daemon

Docker Client

docker run <image> docker …

18.32

Operating System Concepts – 10^th Edition

33 of 174

Docker Workflow

Docker Hub

Image 1

Image 2

Image 3

Image M

Docker Host

Image 1

Image 2

Image 3

Image N

Daemon

Docker Client

docker run <image> docker …

18.33

Operating System Concepts – 10^th Edition

34 of 174

Docker Workflow

Docker Hub

Image 1

Image 2

Image 3

Image M

Docker Host

Image 1

Image 2

Image 3

Image N

Daemon

Container 1

Container 2

Container O

Docker Client

docker run <image> docker …

18.34

Operating System Concepts – 10^th Edition

35 of 174

read-only

18.35

Operating System Concepts – 10^th Edition

36 of 174

Union File System

read-only

18.36

Operating System Concepts – 10^th Edition

37 of 174

Union File System

read-only

18.37

Operating System Concepts – 10^th Edition

38 of 174

18.38

Operating System Concepts – 10^th Edition

39 of 174

Image defined in text-based Dockerfile

•

18.39

Operating System Concepts – 10^th Edition

40 of 174

Image defined in text-based Dockerfile

•

List of commands to build the image

18.40

Operating System Concepts – 10^th Edition

41 of 174

Image defined in text-based Dockerfile

•

List of commands to build the image

FROM fedora:latest

CMD echo “Hello world”

18.41

Operating System Concepts – 10^th Edition

42 of 174

Image defined in text-based Dockerfile

•

List of commands to build the image

FROM fedora:latest

CMD echo “Hello world”

FROM jboss/wildlfy

MAINTAINER Arun Gupta <arungupta@redhat.com>

RUN curl -L https://github.com/javaee-samples/javaee7-hol/raw/master/solution/ movieplex7-1.0-SNAPSHOT.war -o /opt/jboss/wildfly/standalone/deployments/ movieplex7-1.0-SNAPSHOT.war

18.42

Operating System Concepts – 10^th Edition

43 of 174

Image defined in text-based Dockerfile

•

List of commands to build the image

•

docker build or pull

FROM fedora:latest

CMD echo “Hello world”

FROM jboss/wildlfy

MAINTAINER Arun Gupta <arungupta@redhat.com>

RUN curl -L https://github.com/javaee-samples/javaee7-hol/raw/master/solution/ movieplex7-1.0-SNAPSHOT.war -o /opt/jboss/wildfly/standalone/deployments/ movieplex7-1.0-SNAPSHOT.war

18.43

Operating System Concepts – 10^th Edition

44 of 174

18.44

Operating System Concepts – 10^th Edition

45 of 174

18.45

Operating System Concepts – 10^th Edition

46 of 174

18.46

Operating System Concepts – 10^th Edition

47 of 174

Images shared using registry

•

18.47

Operating System Concepts – 10^th Edition

48 of 174

Images shared using registry

•

Docker Hub is public SaaS

18.48

Operating System Concepts – 10^th Edition

49 of 174

Images shared using registry

•

Docker Hub is public SaaS

•

Private registries can be setup inside firewall

18.49

Operating System Concepts – 10^th Edition

50 of 174

Images shared using registry

•

Docker Hub is public SaaS

•

Private registries can be setup inside firewall

•

docker push or pull <IMAGE_ID>

18.50

Operating System Concepts – 10^th Edition

51 of 174

18.51

Operating System Concepts – 10^th Edition

52 of 174

Container built from image

•

18.52

Operating System Concepts – 10^th Edition

53 of 174

Container built from image

•

Runtime representation of image

18.53

Operating System Concepts – 10^th Edition

54 of 174

Container built from image

•

Runtime representation of image

•

Self contained execution environment

18.54

Operating System Concepts – 10^th Edition

55 of 174

Container built from image

•

Runtime representation of image

•

Self contained execution environment

•

docker run <IMAGE_ID>

18.55

Operating System Concepts – 10^th Edition

56 of 174

Docker commands

•

docker ps: List running containers

•

docker stop: Stop a running container

•

docker rm: Remove a running container

•

docker rmi: Remove an image

•

…

https://docs.docker.com/reference/commandline/cli/

18.56

Operating System Concepts – 10^th Edition

57 of 174

http://www.wavemaker.com/cloud/docker-ecosystem-year-in-review-2014/

18.57

Operating System Concepts – 10^th Edition

58 of 174

http://www.wavemaker.com/cloud/docker-ecosystem-year-in-review-2014/

18.58

Operating System Concepts – 10^th Edition

59 of 174

http://venturebeat.com/2015/01/15/heres-how-big-docker-got-last-year/

18.59

Operating System Concepts – 10^th Edition

60 of 174

http://venturebeat.com/2015/01/15/heres-how-big-docker-got-last-year/

18.60

Operating System Concepts – 10^th Edition

61 of 174

http://www.techvalidate.com/product-research/red-hat-enterprise-linux/charts/E21-1EE-BF2

18.61

Operating System Concepts – 10^th Edition

62 of 174

Benefits of Containers

18.62

Operating System Concepts – 10^th Edition

63 of 174

Application Operating Environment

18.63

Operating System Concepts – 10^th Edition

64 of 174

Kubernetes

18.64

Operating System Concepts – 10^th Edition

65 of 174

Kubernetes

•

Open source orchestration system for Docker containers

18.65

Operating System Concepts – 10^th Edition

66 of 174

Kubernetes

•

Open source orchestration system for Docker containers

•

Provide declarative primitives for the “desired state”

18.66

Operating System Concepts – 10^th Edition

67 of 174

Kubernetes

•

Open source orchestration system for Docker containers

•

Provide declarative primitives for the “desired state”

Self-healing

18.67

Operating System Concepts – 10^th Edition

68 of 174

Kubernetes

•

Open source orchestration system for Docker containers

•

Provide declarative primitives for the “desired state”

Self-healing

Auto-restarting

18.68

Operating System Concepts – 10^th Edition

69 of 174

Kubernetes

•

Open source orchestration system for Docker containers

•

Provide declarative primitives for the “desired state”

Self-healing

Auto-restarting

Schedule across hosts

18.69

Operating System Concepts – 10^th Edition

70 of 174

Kubernetes

•

Open source orchestration system for Docker containers

•

Provide declarative primitives for the “desired state”

Self-healing

Auto-restarting

Schedule across hosts

Replicating

18.70

Operating System Concepts – 10^th Edition

71 of 174

Key Concepts

18.71

Operating System Concepts – 10^th Edition

72 of 174

Key Concepts

•

Pods: Smallest deployable unit that can be created, scheduled, managed (logical collection of containers)

18.72

Operating System Concepts – 10^th Edition

73 of 174

Key Concepts

•

Pods: Smallest deployable unit that can be created, scheduled, managed (logical collection of containers)

•

Master: Central point that provides unified view of cluster, control one or more minions

18.73

Operating System Concepts – 10^th Edition

74 of 174

Key Concepts

•

Pods: Smallest deployable unit that can be created, scheduled, managed (logical collection of containers)

•

Master: Central point that provides unified view of cluster, control one or more minions

•

Minion: Run tasks from master

18.74

Operating System Concepts – 10^th Edition

75 of 174

Kubernetes

Master

Minion

Container

Pod

Container

Pod

Container

Pod

Container

Docker

Minion

Container

Pod

Container

Pod

Container

Pod

Container

Docker

Minion

Container

Pod

Container

Pod

Container

Pod

Container

Docker

18.75

Operating System Concepts – 10^th Edition

76 of 174

kubectl

18.76

Operating System Concepts – 10^th Edition

77 of 174

kubectl

•

Controls the Kubernetes cluster manager

18.77

Operating System Concepts – 10^th Edition

78 of 174

kubectl

•

Controls the Kubernetes cluster manager

•

kubectl get pods or minions

18.78

Operating System Concepts – 10^th Edition

79 of 174

kubectl

•

Controls the Kubernetes cluster manager

•

kubectl get pods or minions

•

kubectl create -f <filename>

18.79

Operating System Concepts – 10^th Edition

80 of 174

kubectl

•

Controls the Kubernetes cluster manager

•

kubectl get pods or minions

•

kubectl create -f <filename>

•

lubectl update or delete

18.80

Operating System Concepts – 10^th Edition

81 of 174

kubectl

•

Controls the Kubernetes cluster manager

•

kubectl get pods or minions

•

kubectl create -f <filename>

•

lubectl update or delete

•

kubectl resize —replicas=3 replicationcontrollers <name>

18.81

Operating System Concepts – 10^th Edition

82 of 174

Kubernetes Config

{

"id": "mysql",

"kind": "Pod", "apiVersion": "v1beta1", "desiredState": {

"manifest": { "version": "v1beta1", "id": "mysql",

"containers": [{

"name": "mysql",

"image": "mysql", "cpu": 100,

"ports": [{

3306,

"containerPort": "hostPort": 3306

}]

}

"labels": {

"name": "mysql"

}

18.82

Operating System Concepts – 10^th Edition

83 of 174

Kubernetes Config

{			{
	"id": "mysql",			"id": "wildfly",
	"kind": "Pod",			"kind": "Pod",
	"apiVersion": "v1beta1",			"apiVersion": "v1beta1",
	"desiredState": {			"desiredState": {
	"manifest": {			"manifest": {
	"version": "v1beta1",			"version": "v1beta1",
	"id": "mysql",			"id": "wildfly",
	"containers": [{			"containers": [{
	"name": "mysql",			"name": "wildfly",
	"image": "mysql",			"image": "jboss/wildfly",
	"cpu": 100,			"cpu": 100,
	"ports": [{			"ports": [{
	"containerPort":	3306,		"containerPort": 8080,
	"hostPort": 3306			"hostPort": 8080
	}]			}]
	}]			}]
	}			}
	},			},
	"labels": {			"labels": {
	"name": "mysql"			"name": "wildfly"
	}			}
}			}

18.83

Operating System Concepts – 10^th Edition

84 of 174

Microservices

building applications as suites of services. As well as the fact that services are independently deployable and scalable, each service also provides a firm module boundary, even allowing for different services to be written in different programming languages. They can also be managed by different teams

http://martinfowler.com/articles/microservices.html

18.84

Operating System Concepts – 10^th Edition

85 of 174

Is it SOA?

•

SOA for hipsters?

•

Fine-grained SOA?

•

Focus on ESBs in SOA?

•

SOA done right?

18.85

Operating System Concepts – 10^th Edition

86 of 174

Monolith Application

Database

Business Logic

18.86

Operating System Concepts – 10^th Edition

87 of 174

Monolith Application

Database

Business Logic

HTML

CSS

18.87

Operating System Concepts – 10^th Edition

88 of 174

Monolith Application

Business Logic

HTML

CSS

HTML

Database

JPA

18.88

Operating System Concepts – 10^th Edition

89 of 174

Monolith Application

Database

Business Logic

HTML

CSS

HTML

CDI

HTML

REST

HTML

JSF

HTML

JPA

Cache

18.89

Operating System Concepts – 10^th Edition

90 of 174

Monolith Application

Database

Business Logic

HTML

CSS

HTML

CDI

HTML

REST

HTML

JSF

HTML

JPA

Cache

18.90

Operating System Concepts – 10^th Edition

91 of 174

Monolith Application

Database

Business Logic

HTML

CSS

HTML

CDI

HTML

REST

HTML

JSF

HTML

JPA

Load Balancer

Cache

18.91

Operating System Concepts – 10^th Edition

92 of 174

Before Microservices

WAR

JAR

EAR

WAR

JAR

18.92

Operating System Concepts – 10^th Edition

93 of 174

Before Microservices

WAR

Cache

WAR

JAR

EAR

WAR

JAR

18.93

Operating System Concepts – 10^th Edition

94 of 174

Before Microservices

WAR

Cache

WAR

JAR

EAR

WAR

JAR

18.94

Operating System Concepts – 10^th Edition

95 of 174

Before Microservices

WAR

Cache

WAR

JAR

EAR

WAR

JAR

18.95

Operating System Concepts – 10^th Edition

96 of 174

Before Microservices

WAR

Cache

Load Balancer

WAR

JAR

EAR

WAR

JAR

18.96

Operating System Concepts – 10^th Edition

97 of 174

Advantages of Monolith Application

18.97

Operating System Concepts – 10^th Edition

98 of 174

Advantages of Monolith Application

•

Typically packaged in a single .ear

18.98

Operating System Concepts – 10^th Edition

99 of 174

Advantages of Monolith Application

•

Typically packaged in a single .ear

•

Simple to develop/deploy

18.99

Operating System Concepts – 10^th Edition

100 of 174

Advantages of Monolith Application

•

Typically packaged in a single .ear

•

Simple to develop/deploy

•

Easy to test (all required services are up)

18.100

Operating System Concepts – 10^th Edition

101 of 174

Disadvantages of Monolith Application

18.101

Operating System Concepts – 10^th Edition

102 of 174

Disadvantages of Monolith Application

•

Difficult to develop and maintain

18.102

Operating System Concepts – 10^th Edition

103 of 174

Disadvantages of Monolith Application

•

Difficult to develop and maintain

•

Obstacle to frequent deployments

18.103

Operating System Concepts – 10^th Edition

104 of 174

Disadvantages of Monolith Application

•

Difficult to develop and maintain

•

Obstacle to frequent deployments

•

Makes it difficult to try out new technologies/ framework

18.104

Operating System Concepts – 10^th Edition

105 of 174

Monolith Application

Database

Business Logic

HTML

Version 1

18.105

Operating System Concepts – 10^th Edition

106 of 174

Monolith Application

Database

ness Logic

HTML

Version 1

Database

Busi

Business Logic

HTML

Version 2

18.106

Operating System Concepts – 10^th Edition

107 of 174

Monolith Application

Database

ness Logic

HTML

Version 1

Database

ess Logic

HTML

Version 2

Database

Busi

Busin

Business Logic

HTML

Version 3

18.107

Operating System Concepts – 10^th Edition

108 of 174

Monolith Application

Database

Busi

ness Logic

HTML

Version 1

Database

Busin

ess Logic

HTML

Version 2

Database

ess Logic

HTML

Version 3

Database

Busin

Business Logic

HTML

Version 4

18.108

Operating System Concepts – 10^th Edition

109 of 174

http://martinfowler.com/articles/microservices.html

18.109

Operating System Concepts – 10^th Edition

110 of 174

Characteristics of µservices

18.110

Operating System Concepts – 10^th Edition

111 of 174

Characteristics of µservices

Explicitly published interface, bounded context

18.111

Operating System Concepts – 10^th Edition

112 of 174

Characteristics of µservices

Explicitly published interface, bounded context
Domain driven design (full-stack developer)

18.112

Operating System Concepts – 10^th Edition

113 of 174

Characteristics of µservices

Explicitly published interface, bounded context
Domain driven design (full-stack developer)
Independently deployable and automated (CI / CD)

18.113

Operating System Concepts – 10^th Edition

114 of 174

Characteristics of µservices

Explicitly published interface, bounded context
Domain driven design (full-stack developer)
Independently deployable and automated (CI / CD)
Designed for failure

18.114

Operating System Concepts – 10^th Edition

115 of 174

Characteristics of µservices

Explicitly published interface, bounded context
Domain driven design (full-stack developer)
Independently deployable and automated (CI / CD)
Designed for failure
Decentralized, use IPC to communicate

18.115

Operating System Concepts – 10^th Edition

116 of 174

Characteristics of µservices

Explicitly published interface, bounded context
Domain driven design (full-stack developer)
Independently deployable and automated (CI / CD)
Designed for failure
Decentralized, use IPC to communicate
Heterogeneous, polyglot

18.116

Operating System Concepts – 10^th Edition

117 of 174

Characteristics of µservices

Explicitly published interface, bounded context
Domain driven design (full-stack developer)
Independently deployable and automated (CI / CD)
Designed for failure
Decentralized, use IPC to communicate
Heterogeneous, polyglot
Full responsibility - “you build it, you run it”

18.117

Operating System Concepts – 10^th Edition

118 of 174

Characteristics of µservices

Explicitly published interface, bounded context
Domain driven design (full-stack developer)
Independently deployable and automated (CI / CD)
Designed for failure
Decentralized, use IPC to communicate
Heterogeneous, polyglot
Full responsibility - “you build it, you run it”
“Smart endpoints, dumb pipes”

18.118

Operating System Concepts – 10^th Edition

119 of 174

Scaling µservices

http://akfpartners.com/techblog/2008/05/08/splitting-applications-or-services-for-scale/

18.119

Operating System Concepts – 10^th Edition

120 of 174

Strategies for decomposing

18.120

Operating System Concepts – 10^th Edition

121 of 174

Strategies for decomposing

•

Verb or usecase - e.g. Checkout UI

18.121

Operating System Concepts – 10^th Edition

122 of 174

Strategies for decomposing

•

Verb or usecase - e.g. Checkout UI

•

Noun - e.g. Catalog product service

18.122

Operating System Concepts – 10^th Edition

123 of 174

Strategies for decomposing

•

Verb or usecase - e.g. Checkout UI

•

Noun - e.g. Catalog product service

•

Single Responsible Principle - e.g. Unix utilities

18.123

Operating System Concepts – 10^th Edition

124 of 174

Towards µservices

Service A

EAR

WAR

JAR

18.124

Operating System Concepts – 10^th Edition

125 of 174

Towards µservices

Service A

EAR

WAR

JAR

18.125

Operating System Concepts – 10^th Edition

126 of 174

Towards µservices

Service A

EAR

WAR

JAR

Cache

18.126

Operating System Concepts – 10^th Edition

127 of 174

Towards µservices

Service A

EAR

WAR

JAR

Cache

18.127

Operating System Concepts – 10^th Edition

128 of 174

Towards µservices

Service A

EAR

WAR

JAR

Cache

18.128

Operating System Concepts – 10^th Edition

129 of 174

Towards µservices

Service A

EAR

WAR

Load Balancer

WAR

JAR

Cache

18.129

Operating System Concepts – 10^th Edition

130 of 174

Aggregator Pattern #1

Service C

WAR

Service B

WAR

Service A

WAR

18.130

Operating System Concepts – 10^th Edition

131 of 174

Aggregator Pattern #1

Service C

WAR

Service B

WAR

Cache

Service A

WAR

Cache

18.131

Operating System Concepts – 10^th Edition

132 of 174

Aggregator Pattern #1

Service C

WAR

Service B

WAR

Cache

Service A

WAR

Cache

Aggregator

Load Balancer

18.132

Operating System Concepts – 10^th Edition

133 of 174

Aggregator Pattern #1

Service C

WAR

Service B

WAR

Cache

Service A

WAR

Cache

Aggregator

Load Balancer

18.133

Operating System Concepts – 10^th Edition

134 of 174

Aggregator Pattern #1

Service C

WAR

Service B

WAR

Cache

Service A

WAR

Cache

Aggregator

Load Balancer

18.134

Operating System Concepts – 10^th Edition

135 of 174

Proxy Pattern #1.5

Service C

WAR

Service B

WAR

Cache

Service A

WAR

Cache

Proxy

Load Balancer

18.135

Operating System Concepts – 10^th Edition

136 of 174

Proxy Pattern #1.5

Service C

WAR

Service B

WAR

Cache

Service A

WAR

Cache

Proxy

Load Balancer

18.136

Operating System Concepts – 10^th Edition

137 of 174

Proxy Pattern #1.5

Service C

WAR

Service B

WAR

Cache

Service A

WAR

Cache

Proxy

Load Balancer

18.137

Operating System Concepts – 10^th Edition

138 of 174

Chained Pattern #2

Service A

WAR

Cache

Load Balancer

18.138

Operating System Concepts – 10^th Edition

139 of 174

Chained Pattern #2

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

18.139

Operating System Concepts – 10^th Edition

140 of 174

Chained Pattern #2

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

18.140

Operating System Concepts – 10^th Edition

141 of 174

Branch Pattern #3

Service A

WAR

Cache

Load Balancer

18.141

Operating System Concepts – 10^th Edition

142 of 174

Branch Pattern #3

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

18.142

Operating System Concepts – 10^th Edition

143 of 174

Branch Pattern #3

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

18.143

Operating System Concepts – 10^th Edition

144 of 174

Branch Pattern #3

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

Cache

18.144

Operating System Concepts – 10^th Edition

145 of 174

Shared Resources #4

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

Cache

18.145

Operating System Concepts – 10^th Edition

146 of 174

Shared Resources #4

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

18.146

Operating System Concepts – 10^th Edition

147 of 174

Shared Resources #4

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

18.147

Operating System Concepts – 10^th Edition

148 of 174

Shared Resources #4

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

18.148

Operating System Concepts – 10^th Edition

149 of 174

Shared Resources #4

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

18.149

Operating System Concepts – 10^th Edition

150 of 174

Async Messaging #5

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

Cache

Queue

18.150

Operating System Concepts – 10^th Edition

151 of 174

Async Messaging #5

Service A

WAR

Cache

Load Balancer

Service B

WAR

Cache

Service C

WAR

Cache

Service D

WAR

Cache

Queue

18.151

Operating System Concepts – 10^th Edition

152 of 174

Decentralized data

18.152

Operating System Concepts – 10^th Edition

153 of 174

Decentralized data

•

Each service has it owns schema, loose coupling

18.153

Operating System Concepts – 10^th Edition

154 of 174

Decentralized data

•

Each service has it owns schema, loose coupling

•

Polyglot persistence

18.154

Operating System Concepts – 10^th Edition

155 of 174

Decentralized data

•

Each service has it owns schema, loose coupling

•

Polyglot persistence

•

Distributed transactions reduces system availability

18.155

Operating System Concepts – 10^th Edition

156 of 174

Decentralized data

•

Each service has it owns schema, loose coupling

•

Polyglot persistence

•

Distributed transactions reduces system availability

•

Event-driven asynchronous updates

18.156

Operating System Concepts – 10^th Edition

157 of 174

Decentralized data

•

Each service has it owns schema, loose coupling

•

Polyglot persistence

•

Distributed transactions reduces system availability

•

Event-driven asynchronous updates

Simplifies development

18.157

Operating System Concepts – 10^th Edition

158 of 174

Decentralized data

•

Each service has it owns schema, loose coupling

•

Polyglot persistence

•

Distributed transactions reduces system availability

•

Event-driven asynchronous updates

Simplifies development

Availability over consistency

18.158

Operating System Concepts – 10^th Edition

159 of 174

Decentralized data

•

Each service has it owns schema, loose coupling

•

Polyglot persistence

•

Distributed transactions reduces system availability

•

Event-driven asynchronous updates

Simplifies development

Availability over consistency

Implement compensating transactions

18.159

Operating System Concepts – 10^th Edition

160 of 174

Event-driven async updates

Service A

WAR

Cache

Message Broker

Service B

WAR

Cache

18.160

Operating System Concepts – 10^th Edition

161 of 174

Advantages of µservices

18.161

Operating System Concepts – 10^th Edition

162 of 174

Advantages of µservices

Easier to develop, understand, maintain

18.162

Operating System Concepts – 10^th Edition

163 of 174

Advantages of µservices

Easier to develop, understand, maintain

Starts faster than a monolith, speeds up deployments

18.163

Operating System Concepts – 10^th Edition

164 of 174

Advantages of µservices

Easier to develop, understand, maintain

Starts faster than a monolith, speeds up deployments

Local change can easily deployed, makes CD feasible

18.164

Operating System Concepts – 10^th Edition

165 of 174

Advantages of µservices

Easier to develop, understand, maintain

Starts faster than a monolith, speeds up deployments

Local change can easily deployed, makes CD feasible

Each service can scale on X- and Y-axis

18.165

Operating System Concepts – 10^th Edition

166 of 174

Advantages of µservices

Easier to develop, understand, maintain

Starts faster than a monolith, speeds up deployments

Local change can easily deployed, makes CD feasible

Each service can scale on X- and Y-axis

Improves fault isolation

18.166

Operating System Concepts – 10^th Edition

167 of 174

Advantages of µservices

Easier to develop, understand, maintain

Starts faster than a monolith, speeds up deployments

Local change can easily deployed, makes CD feasible

Each service can scale on X- and Y-axis

Improves fault isolation

Eliminates any long-term commitment to a technology stack

18.167

Operating System Concepts – 10^th Edition

168 of 174

Advantages of µservices

Easier to develop, understand, maintain

Starts faster than a monolith, speeds up deployments

Local change can easily deployed, makes CD feasible

Each service can scale on X- and Y-axis

Improves fault isolation

Eliminates any long-term commitment to a technology stack

Freedom of choice of technology, tools, frameworks

18.168

Operating System Concepts – 10^th Edition

169 of 174

Drawbacks of µservices

18.169

Operating System Concepts – 10^th Edition

170 of 174

Drawbacks of µservices

•

Additional complexity of distributed systems

18.170

Operating System Concepts – 10^th Edition

171 of 174

Drawbacks of µservices

•

Additional complexity of distributed systems

•

Significant operational complexity, need high-level of automation

18.171

Operating System Concepts – 10^th Edition

172 of 174

Drawbacks of µservices

•

Additional complexity of distributed systems

•

Significant operational complexity, need high-level of automation

•

Rollout plan to coordinate deployments

18.172

Operating System Concepts – 10^th Edition

173 of 174

Drawbacks of µservices

•

Additional complexity of distributed systems

•

Significant operational complexity, need high-level of automation

•

Rollout plan to coordinate deployments

•

Slower ROI, to begin with

18.173

Operating System Concepts – 10^th Edition

174 of 174

Docker and Kubernetes are well suited to create a µservices-based application.

18.174

Operating System Concepts – 10^th Edition