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© Copyright 2018 Pivotal Software, Inc. All rights Reserved.
Roy Clarkson
@RoyClarkson
Glenn Renfro
@cppwfs
Scheduling Apps In The
Cloud
First Let’s Get This Out
Of Our System
Because Scheduling is
Exciting stuff...
But Seriously
What does Scheduling Look
Like In The ?
Cover w/ Image
Agenda
■ What does scheduling mean?
■ Ways to Schedule
■ Cloud support scheduling
■ Spring Cloud Task
■ Scheduling Simplified
Vocabulary… Woot! Woot!
Task - Is a short-lived microservice. Also known as a
ephemeral microservice.
It is also a 12 factor app: https://12factor.net/
● Launching the task
● Tracking the task execution
● Obtaining its final state
● Managing failure conditions
What Does
Scheduling
Mean?
App that executes tasks based on
calendar events
Launching Tasks based on Event
Ways to Schedule
Cloud Scheduling Cloud Foundry - PCF Scheduler
Kubernetes Cron Jobs
Cloud Scheduling
Things that they both have in
common
Cloud Foundry - PCF Scheduler
Kubernetes - Cron Jobs
Cloud Scheduling ● Both CF and Kubernetes have a
concept of ephemeral apps.
○ Jobs
○ Tasks
Cloud Foundry - PCF Scheduler
Kubernetes - Cron Jobs
Cloud Scheduling
● A schedule name was applied to an
application name
● An application was specified (one
pushed the other pulled from a
repository)
● An ability to pass in command line
args and environment
variables(properties)
● and...
Cloud Foundry - PCF Scheduler
Kubernetes - Cron Jobs
Cloud Scheduling
My Gosh! It’s full of CRON!
Cloud Foundry - PCF Scheduler
Kubernetes - Cron Jobs
Cloud Scheduling
● Tasks can be scheduled via :
○ RESTFul API
○ Command Line Interface
Cloud Foundry - PCF Scheduler
Cloud Scheduling
● PCF Scheduler Does offer a UI
Suspicious Cat knew
there would be a
difference!
PCF - Scheduler (basic steps)
● Push app to Cloud Foundry
● Bind the services you need to the application
● Create your Job
● Create your schedule
Cloud Foundry - PCF Scheduler
cf push test-app -p test-app.jar
cf bind-service test-app mydatabase
cf create-job test-app my-schedule-job
"JAVA_OPTS="..."
cf schedule-job my-schedule-job "0 12 ? * *"
Kubernetes - CronJobs (basic steps)
● Push your docker image up to repository
● Create your specification
○ Create your .spec file to include
■ Schedule spec
■ Job Template Spec
○ -or-
○ Used kubectl run to create a schedule
Kubernetes - Cron Jobs via Yaml
kind: CronJob
metadata:
name: hello
spec:
schedule: "*/1 * * * *"
jobTemplate:
spec:
template:
spec:
containers:
- name: hello
image: springcloud/spring-cloud-scheduler-spi-test-app
args:
- spring.application.name=hello
restartPolicy: OnFailure
kubectl create -f ./cronjob.yaml
Kubernetes - Cron Jobs
kubectl run mysched --schedule="*/5 * * * *"
--restart=Never
--image=springcloud/spring-cloud-scheduler-spi-test-app
● Launching the task
● Tracking the task execution
● Obtaining its final state
● Managing failure conditions
What Does
Scheduling
Mean?
● Tracking the task execution
● Obtaining its final state
● Managing failure conditions
Spring Cloud Task
&
Spring Batch
So let’s simplify things a
little with
Spring Cloud Data Flow
23
A toolkit for building
data integration,
real-time streaming,
and batch data
processing pipelines.
WHAT IS SPRING CLOUD DATA FLOW?
24
Data pipelines consist of Spring Boot apps, using
Spring Cloud Stream for event-streaming or
Spring Cloud Task for batch processes.
Ready for Data Integration with >60
out-of-the-box streaming and batch Apps.
DSL, GUI, and REST-APIs to build and
orchestrate data pipelines onto platforms like
Kubernetes and Cloud Foundry.
Continuous delivery for streaming data pipelines
using Spring Cloud Skipper.
Cron-job scheduler for batch data pipelines using
Spring Cloud Scheduler.
A toolkit for building
data integration,
real-time streaming,
and batch data
processing pipelines.
WHAT IS SPRING CLOUD DATA FLOW?
25
Data pipelines consist of Spring Boot apps, using
Spring Cloud Stream for event-streaming or
Spring Cloud Task for batch processes.
Ready for Data Integration with >60
out-of-the-box streaming and batch Apps.
DSL, GUI, and REST-APIs to build and
orchestrate data pipelines onto platforms like
Kubernetes and Cloud Foundry.
Continuous delivery for streaming data pipelines
using Spring Cloud Skipper.
Cron-job scheduler for batch data pipelines using
Spring Cloud Scheduler.
A toolkit for building
data integration,
real-time streaming,
and batch data
processing pipelines.
WHAT IS SPRING CLOUD DATA FLOW?
26
Data pipelines consist of Spring Boot apps, using
Spring Cloud Stream for event-streaming or
Spring Cloud Task for batch processes.
Ready for Data Integration with >60
out-of-the-box streaming and batch Apps.
DSL, GUI, and REST-APIs to build and
orchestrate data pipelines onto platforms like
Kubernetes and Cloud Foundry.
Continuous delivery for streaming data pipelines
using Spring Cloud Skipper.
Cron-job scheduler for batch data pipelines using
Spring Cloud Scheduler.
A toolkit for building
data integration,
real-time streaming,
and batch data
processing pipelines.
WHAT IS SPRING CLOUD DATA FLOW?
27
Data pipelines consist of Spring Boot apps, using
Spring Cloud Stream for event-streaming or
Spring Cloud Task for batch processes.
Ready for Data Integration with >60
out-of-the-box streaming and batch Apps.
DSL, GUI, and REST-APIs to build and
orchestrate data pipelines onto platforms like
Kubernetes and Cloud Foundry.
Cron-job scheduler for batch data pipelines using
Spring Cloud Scheduler.
A toolkit for building
data integration,
real-time streaming,
and batch data
processing pipelines.
WHAT IS SPRING CLOUD DATA FLOW?
28
Demo
How to schedule a task in Spring Cloud Data Flow on
Kubernetes (PKS - Pivotal Container Service)
Local Version runs on your
machine.
Cloud Foundry Version can be
installed by hand or by the PCF
SCDF TIle
Kubernetes Version can be install
by hand or by our Helm Chart
Data Flow
Installation
SCDF
OSS or PCF Tile?
SCDF for PCF
Addition of the Spring Cloud Data Flow server to the
Marketplace as a managed service
Automatic integration with dependent PCF services:
- MySQL for PCF (or a user-provided relational
database service) for apps, pipelines, and task
history
- RabbitMQ for PCF (or a user-provided RabbitMQ
or Kafka service) for event messaging
- Redis for PCF (or a user-provided Redis service)
for capturing analytics data
Integration of Data Flow server with PCF’s UAA
security model
SCDF Tile on Pivotal Network
PCF Operations Manager Tiles
Versions SCDF for PCF tile v1.5.1
is packaged with
SCDF OSS v2.0.1
SCDF for PCF Architecture
Demo
How to schedule a task in Spring Cloud Data Flow for
Pivotal Cloud Foundry (PCF)
1. Provision new SCDF SI via GUI
2. Switch to previously installed SCDF service
3. Open management dashboard
4. Create a new task (timestamp)
5. Create a new schedule (0/5 0 ? * * *)
6. Create a second schedule (0/2 0 ? * * *)
CF CLI
$ cf create-service
p-dataflow standard df1 -c
'{"scheduler": {"name":
"scheduler-for-pcf",
"plan": "standard"}}'
SCDF CLI Plugin
$ cf install-plugin -r
CF-Community
"spring-cloud-dataflow-for
-pcf"
SCDF CLI Plugin
$ cf dataflow-shell
data-flow
What about the case of a task getting kicked
off by an event outside of a calendar based
event?
41
Seems Like We are Missing Something…
Task Launched via an event
handled in a stream.
Task Launching
By Event
Also, what if I have a scheduler already, can
I take advantage of that?
43
Seems Like We are Missing Something…
Questions?
Transforming How The World Builds Software
© Copyright 2018 Pivotal Software, Inc. All rights Reserved.
More Info
- https://cloud.spring.io/spring-cloud-dataflow/
- https://network.pivotal.io/products/p-dataflow
- https://docs.pivotal.io/scdf/1-3/
- https://spring.io/projects/spring-cloud-task
- https://spring.io/projects/spring-cloud-stream
- https://github.com/spring-cloud/spring-cloud-data
flow

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Scheduling Apps in the Cloud - Glenn Renfro & Roy Clarkson

  • 1. © Copyright 2018 Pivotal Software, Inc. All rights Reserved. Roy Clarkson @RoyClarkson Glenn Renfro @cppwfs Scheduling Apps In The Cloud
  • 2. First Let’s Get This Out Of Our System
  • 4. But Seriously What does Scheduling Look Like In The ?
  • 5. Cover w/ Image Agenda ■ What does scheduling mean? ■ Ways to Schedule ■ Cloud support scheduling ■ Spring Cloud Task ■ Scheduling Simplified
  • 6. Vocabulary… Woot! Woot! Task - Is a short-lived microservice. Also known as a ephemeral microservice. It is also a 12 factor app: https://12factor.net/
  • 7. ● Launching the task ● Tracking the task execution ● Obtaining its final state ● Managing failure conditions What Does Scheduling Mean?
  • 8. App that executes tasks based on calendar events Launching Tasks based on Event Ways to Schedule
  • 9. Cloud Scheduling Cloud Foundry - PCF Scheduler Kubernetes Cron Jobs
  • 10. Cloud Scheduling Things that they both have in common
  • 11. Cloud Foundry - PCF Scheduler Kubernetes - Cron Jobs Cloud Scheduling ● Both CF and Kubernetes have a concept of ephemeral apps. ○ Jobs ○ Tasks
  • 12. Cloud Foundry - PCF Scheduler Kubernetes - Cron Jobs Cloud Scheduling ● A schedule name was applied to an application name ● An application was specified (one pushed the other pulled from a repository) ● An ability to pass in command line args and environment variables(properties) ● and...
  • 13. Cloud Foundry - PCF Scheduler Kubernetes - Cron Jobs Cloud Scheduling My Gosh! It’s full of CRON!
  • 14. Cloud Foundry - PCF Scheduler Kubernetes - Cron Jobs Cloud Scheduling ● Tasks can be scheduled via : ○ RESTFul API ○ Command Line Interface
  • 15. Cloud Foundry - PCF Scheduler Cloud Scheduling ● PCF Scheduler Does offer a UI Suspicious Cat knew there would be a difference!
  • 16. PCF - Scheduler (basic steps) ● Push app to Cloud Foundry ● Bind the services you need to the application ● Create your Job ● Create your schedule
  • 17. Cloud Foundry - PCF Scheduler cf push test-app -p test-app.jar cf bind-service test-app mydatabase cf create-job test-app my-schedule-job "JAVA_OPTS="..." cf schedule-job my-schedule-job "0 12 ? * *"
  • 18. Kubernetes - CronJobs (basic steps) ● Push your docker image up to repository ● Create your specification ○ Create your .spec file to include ■ Schedule spec ■ Job Template Spec ○ -or- ○ Used kubectl run to create a schedule
  • 19. Kubernetes - Cron Jobs via Yaml kind: CronJob metadata: name: hello spec: schedule: "*/1 * * * *" jobTemplate: spec: template: spec: containers: - name: hello image: springcloud/spring-cloud-scheduler-spi-test-app args: - spring.application.name=hello restartPolicy: OnFailure kubectl create -f ./cronjob.yaml
  • 20. Kubernetes - Cron Jobs kubectl run mysched --schedule="*/5 * * * *" --restart=Never --image=springcloud/spring-cloud-scheduler-spi-test-app
  • 21. ● Launching the task ● Tracking the task execution ● Obtaining its final state ● Managing failure conditions What Does Scheduling Mean?
  • 22. ● Tracking the task execution ● Obtaining its final state ● Managing failure conditions Spring Cloud Task & Spring Batch
  • 23. So let’s simplify things a little with Spring Cloud Data Flow 23
  • 24. A toolkit for building data integration, real-time streaming, and batch data processing pipelines. WHAT IS SPRING CLOUD DATA FLOW? 24
  • 25. Data pipelines consist of Spring Boot apps, using Spring Cloud Stream for event-streaming or Spring Cloud Task for batch processes. Ready for Data Integration with >60 out-of-the-box streaming and batch Apps. DSL, GUI, and REST-APIs to build and orchestrate data pipelines onto platforms like Kubernetes and Cloud Foundry. Continuous delivery for streaming data pipelines using Spring Cloud Skipper. Cron-job scheduler for batch data pipelines using Spring Cloud Scheduler. A toolkit for building data integration, real-time streaming, and batch data processing pipelines. WHAT IS SPRING CLOUD DATA FLOW? 25
  • 26. Data pipelines consist of Spring Boot apps, using Spring Cloud Stream for event-streaming or Spring Cloud Task for batch processes. Ready for Data Integration with >60 out-of-the-box streaming and batch Apps. DSL, GUI, and REST-APIs to build and orchestrate data pipelines onto platforms like Kubernetes and Cloud Foundry. Continuous delivery for streaming data pipelines using Spring Cloud Skipper. Cron-job scheduler for batch data pipelines using Spring Cloud Scheduler. A toolkit for building data integration, real-time streaming, and batch data processing pipelines. WHAT IS SPRING CLOUD DATA FLOW? 26
  • 27. Data pipelines consist of Spring Boot apps, using Spring Cloud Stream for event-streaming or Spring Cloud Task for batch processes. Ready for Data Integration with >60 out-of-the-box streaming and batch Apps. DSL, GUI, and REST-APIs to build and orchestrate data pipelines onto platforms like Kubernetes and Cloud Foundry. Continuous delivery for streaming data pipelines using Spring Cloud Skipper. Cron-job scheduler for batch data pipelines using Spring Cloud Scheduler. A toolkit for building data integration, real-time streaming, and batch data processing pipelines. WHAT IS SPRING CLOUD DATA FLOW? 27
  • 28. Data pipelines consist of Spring Boot apps, using Spring Cloud Stream for event-streaming or Spring Cloud Task for batch processes. Ready for Data Integration with >60 out-of-the-box streaming and batch Apps. DSL, GUI, and REST-APIs to build and orchestrate data pipelines onto platforms like Kubernetes and Cloud Foundry. Cron-job scheduler for batch data pipelines using Spring Cloud Scheduler. A toolkit for building data integration, real-time streaming, and batch data processing pipelines. WHAT IS SPRING CLOUD DATA FLOW? 28
  • 29. Demo How to schedule a task in Spring Cloud Data Flow on Kubernetes (PKS - Pivotal Container Service)
  • 30. Local Version runs on your machine. Cloud Foundry Version can be installed by hand or by the PCF SCDF TIle Kubernetes Version can be install by hand or by our Helm Chart Data Flow Installation
  • 32. SCDF for PCF Addition of the Spring Cloud Data Flow server to the Marketplace as a managed service Automatic integration with dependent PCF services: - MySQL for PCF (or a user-provided relational database service) for apps, pipelines, and task history - RabbitMQ for PCF (or a user-provided RabbitMQ or Kafka service) for event messaging - Redis for PCF (or a user-provided Redis service) for capturing analytics data Integration of Data Flow server with PCF’s UAA security model
  • 33. SCDF Tile on Pivotal Network
  • 35. Versions SCDF for PCF tile v1.5.1 is packaged with SCDF OSS v2.0.1
  • 36. SCDF for PCF Architecture
  • 37. Demo How to schedule a task in Spring Cloud Data Flow for Pivotal Cloud Foundry (PCF) 1. Provision new SCDF SI via GUI 2. Switch to previously installed SCDF service 3. Open management dashboard 4. Create a new task (timestamp) 5. Create a new schedule (0/5 0 ? * * *) 6. Create a second schedule (0/2 0 ? * * *)
  • 38. CF CLI $ cf create-service p-dataflow standard df1 -c '{"scheduler": {"name": "scheduler-for-pcf", "plan": "standard"}}'
  • 39. SCDF CLI Plugin $ cf install-plugin -r CF-Community "spring-cloud-dataflow-for -pcf"
  • 40. SCDF CLI Plugin $ cf dataflow-shell data-flow
  • 41. What about the case of a task getting kicked off by an event outside of a calendar based event? 41 Seems Like We are Missing Something…
  • 42. Task Launched via an event handled in a stream. Task Launching By Event
  • 43. Also, what if I have a scheduler already, can I take advantage of that? 43 Seems Like We are Missing Something…
  • 45. Transforming How The World Builds Software © Copyright 2018 Pivotal Software, Inc. All rights Reserved.
  • 46. More Info - https://cloud.spring.io/spring-cloud-dataflow/ - https://network.pivotal.io/products/p-dataflow - https://docs.pivotal.io/scdf/1-3/ - https://spring.io/projects/spring-cloud-task - https://spring.io/projects/spring-cloud-stream - https://github.com/spring-cloud/spring-cloud-data flow