This is the presentation material which I presented at Oracle CodeOne 2018.

1. Microsoft Corporation
Sr. Cloud Developer Advocate
Java Champion
Yoshio Terada

2. • GlassFish Evangelist at Sun
Microsystems 2001 - 2010
• Java SE/EE Evangelist at Oracle
Japan 2010 - 2015
• Java Evangelist
• Cloud Developer Advocate at
Microsoft Japan 2015 –
• Tech Conference Speaker in Japan
Self Introduction

5. I will share the Important Topic
Java - Basic
Docker - Basic
Kubernetes - Experience
Dev & DevOps
Java Fun Demo !
Bot on Serverless & Voice operate
k8s

6. When you touch a new technology,
You may encounter some problems,
But please Overcome it and
let's make a better future !!

8. RUN /jdk-11/bin/jlink
--module-path /jdk-11/jmods
--add-modules java.base,java.logging,java.xml,
jdk.unsupported,java.sql,java.naming,
java.desktop,java.management,
java.security.jgss,java.instrument
--compress 2
--no-header-files
--no-man-pages
--output /tmp/custom-jdk-11-min
Create Custom JRE since Java 9

9. Improvement for Container since JDK10
Container detection and Resource
config usage
CPU and Memory allocation for
container become correct value.
Change RAM usage in Container
-XX：InitialRAMPercentage
-XX：MaxRAMPercentage
-XX：MinRAMPercentage

10. Take care of using
JDK 11

11. • java.xml.ws （JAX-WS、Web Services）
• java.xml.bind （JAXB）
• java.activation （JAF）
• java.xml.ws.annotation （Common Annotation）
• java.corba （CORBA）
• java.transaction （JTA）
• java.se.ee
• jdk.xml.ws （JAX-WS Tool）
• jdk.xml.bind （JAXB Tool）
Removed Package since JDK 11
Same Enterprise Application will not run on JDK 11.
Because many enterprise was using XML.

12. However we should
move forward to JDK 11

15. Don't use the latest tag
$ docker build -t myimage/app:latest .
$ docker tag myimage/app:latest
private-repo.azurecr.io/myimage/app:latest
$ docker push
private-repo.azurecr.io/myimage/app:latest

16. Please Use BuildId instead of latest

17. Please create small size of Image
$ docker images|grep openjdk
openjdk 8u171-jre-alpine3.8 ccfb0c 83MB
openjdk 8u171-jre bef23b 443MB
openjdk latest 82f76 977MB

18. The case : Payara Micro Image
$ docker images |grep account
tyoshio2002/account-service 1.4 1fcf34937c1c
4 minutes ago 178MB

20. Permission of User
FROM openjdk:8-jre-alpine
LABEL MAINTAINER Yoshio Terada
COPY ./target/front-end-svc-1.0-SNAPSHOT.jar
/tmp/app.jar
RUN addgroup -g 1000 java
RUN adduser -D -u 1000 -G java java
RUN chown java:java /tmp/payara-micro.jar
USER java
EXPOSE 8080
ENTRYPOINT java -jar /tmp/app.jar

22. k8s is not Silver Bullet

23. It is not for Production !!
https://github.com/yoshioterada/k8s-Azure-Container-Service-AKS--on-Azure/blob/master/Kubernetes-Workshop3.md
Configuration for Deployment

24. Easy for
Hello World

25. https://github.com/yoshioterada/k8s-Azure-Container-Service-AKS--on-Azure/blob/master/Kubernetes-Workshop3.md
Many additional Configuragtion is Need

26. Request Limitation
$ kubectl top pod
NAME CPU(cores) MEMORY(bytes)
account-service-74b64648b7-2bqgs 3m 842Mi
account-service-74b64648b7-48kf8 3m 826Mi
For CPU entry:
The above 0.5(500m) is guaranteed to use the half CPU in
1 CPU. The expression 0.1 is equivalent to the expression
100m, which can be read as “one hundred millicpu”. CPU is
always requested as an absolute quantity, never as a
relative quantity.
For Memory entry:
You can express memory as a plain integer or as a fixed-
point integer using one of these suffixes: E, P, T, G, M, K.
You can also use the power-of-two equivalents: Ei, Pi, Ti,
Gi, Mi, Ki. For example, the following represent roughly
the same value:

27. Service
V1 Pod
Account
Service
V1 Pod
Account
Service
V2 Pod
Account
Service
V2 Pod
Account
Service
Account
Service
Understand “Label & Selector” is Important

28. I Recommended Customer
Not to use the
Persistence Volume on k8s

29. Not Only Azure,
But also it may occure on Others

30. Instead of mount the Volume
I recommend to use SDK !!

32. Managed DB Access via Secure VNet

34. 1. Version UP
2. Staging & Production
3. High Availability

36. Only “One Command” or “Push the Button” !
$ az aks upgrade --name yoshio-java-aks ¥
--resource-group yoshio-java-aks ¥
--kubernetes-version 1.11.3 --yes ¥
--debug
Sounds like Very Easy !!

37. Please Wait !!

38. 7. Take Care of k8s Version Up ?
This is not only Azure but others too !
• If executed the command failed, what do you do ?
• If you version up the k8s, Old Configuration may not Run on new Version.
-> Need to modify YAML file.
-> Need to specify new command option
3rd Party utilities may not run on new Version
Best way is to create new k8s cluster environment

39. Version Up the k8s
Master VM (node) VM (node)
Version11.2
Master VM (node) VM (node)
Version 12.1
I recommend to create new Cluster

40. Dev & Staging & Production (Multi Tenant)
Master VM (node) VM (node)
Staging
Version11.2
Master VM (node) VM (node)
Production
Version 11.2
I recommend to create new Cluster
for safe resource Isolation

41. High Available k8s Env on 2 Region
Master VM (node) VM (node) Master VM (node) VM (node)
West Region East Region
Traffic Manager (DNS Base)
(LB West) (LB East)

43. Trouble

44. 1. Broken by upgrade k8s version (Ex：1.8 → 1.9)
2. Failed to scale the Linux VM
3. So many PODs course operation unavailable
4. YAML Configuration failed when upgrade
5. Attach/Detach PV failed
6. 3rd Party Tool(like Istio) version compatibility
Actual Trouble I faced

45. 1. kubectl describe pod
2. kubectl logs POD_NAME
3. kubectl exec -it POD_NAME /bin/sh
4. kubectl get events –w
5. Deploy Ubuntu pod in same NameSpace
When you faced the problem

47. Supported Java on Azure

49. Free for Java Developer of Azure User
https://www.azul.com/downloads/azure-only/zulu/

50. Azul zule on Docker for Azure
$ docker pull
mcr.microsoft.com/java/jre:8u181-zulu-alpine
https://www.azul.com/downloads/azure-only/zulu/
These downloadable binaries are free to download but can only be used with Java applications or Java application
components that are being developed for deployment on Microsoft Azure Cloud or Azure Stack and are not
intended to be used for any other purpose.

52. How many minutes?
Do you spend to create
DevOps Environment?

53. I spend 2-3 Day
to create DevOps Env.

54. (Aka ：Visual Studio Team Services)
You can use it for any Environment include
AWS, GCP, Oracle

56. Azure DevOps Providing

58. Just only
Few Click !!

59. Free !! I’m not a Sales Person !!

62. Bot on Serverless & Void
Operate k8s Fan Demo

63. LUIS
Bot
クライアント
k8s operation by Slack & Voice Msg

64. https://www.luis.ai/

66. When you touch a new technology,
You may encounter some problems,
But please Overcome it and
let's make a better future !!

68. Engineer can change
the World !!

69. Microsoft Java

70. Microsoft Corporation
Sr. Cloud Developer Advocate
Java Champion
Yoshio Terada