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Spring Book API - TAS4K8s demo

The following demo is spring boot API being deployed to TAS4K8s (https://network.pivotal.io/products/tas-for-kubernetes/). It is assumed you have TAS4K8s running on your K8s cluster and have targeted the API endpoint and logged in as per below

$ cf target
api endpoint:   https://api.tas.lab.pasapples.me
api version:    2.150.0
user:           admin
org:            system
space:          development

Prerequisites

Table of Contents

Run Locally

Clone or Fork repository as follows.

$ git clone https://github.com/papicella/spring-book-service.git
$ cd spring-book-service

Build/Package as shown below.

$ ./mvnw -D skipTests package

Run as shown below accessing in a browser using - [http://localhost:8080/swagger-ui.html]

$ ./mvnw spring-boot:run
....
2020-06-04 09:43:08.598  INFO 4620 --- [           main] c.e.s.SpringBookServiceApplication       : Started SpringBookServiceApplication in 4.052 seconds (JVM running for 4.406)
2020-06-04 09:43:08.652  INFO 4620 --- [           main] c.e.springbookservice.LoadDatabase       : Preloading Book(id=1, title=Flexible Rails - Pas, author=Peter Armstrong)
2020-06-04 09:43:08.653  INFO 4620 --- [           main] c.e.springbookservice.LoadDatabase       : Preloading Book(id=2, title=Brownfield Application Development in .NET, author=Kyle Baley)
2020-06-04 09:43:08.654  INFO 4620 --- [           main] c.e.springbookservice.LoadDatabase       : Preloading Book(id=3, title=MongoDB in Action, author=Kyle Banker)
2020-06-04 09:43:08.655  INFO 4620 --- [           main] c.e.springbookservice.LoadDatabase       : Preloading Book(id=4, title=Java Persistence with Hibernate, author=Christian Bauer)
2020-06-04 09:43:08.656  INFO 4620 --- [           main] c.e.springbookservice.LoadDatabase       : Preloading Book(id=5, title=POJO's In Action, author=Chris Richardson)

alt tag

You can also access the REST based API endpoints as shown below

$ http :8080/api/book/1
HTTP/1.1 200
Connection: keep-alive
Content-Type: application/json
Date: Wed, 03 Jun 2020 23:52:24 GMT
Keep-Alive: timeout=60
Transfer-Encoding: chunked

{
    "author": "Peter Armstrong",
    "id": 1,
    "title": "Flexible Rails - Pas"
}

$ http :8080/api/book/
HTTP/1.1 200
Connection: keep-alive
Content-Type: application/json
Date: Wed, 03 Jun 2020 23:52:26 GMT
Keep-Alive: timeout=60
Transfer-Encoding: chunked

[
    {
        "author": "Peter Armstrong",
        "id": 1,
        "title": "Flexible Rails - Pas"
    },
    {
        "author": "Kyle Baley",
        "id": 2,
        "title": "Brownfield Application Development in .NET"
    },
    {
        "author": "Kyle Banker",
        "id": 3,
        "title": "MongoDB in Action"
    },
    {
        "author": "Christian Bauer",
        "id": 4,
        "title": "Java Persistence with Hibernate"
    },
    {
        "author": "Chris Richardson",
        "id": 5,
        "title": "POJO's In Action"
    }
]

Create Service Broker

Note: We are using helm3 here to install minibroker

Create Namespace for minibroker and install with helm.

$ kubectl create ns minibroker
$ helm repo add minibroker https://minibroker.blob.core.windows.net/charts
$ helm repo update
$ helm install  minibroker --namespace minibroker minibroker/minibroker --set "deployServiceCatalog=false" --set "defaultNamespace=minibroker"

Verify installation.

$ helm ls -A
NAME      	NAMESPACE    	REVISION	UPDATED                              	STATUS  	CHART               	APP VERSION
certifier 	cert-manager 	1       	2020-05-28 15:22:04.423771 +1000 AEST	deployed	cert-manager-v0.15.0	v0.15.0
harbor    	harbor       	1       	2020-05-28 15:28:02.142397 +1000 AEST	deployed	harbor-1.3.2        	1.10.2
minibroker	minibroker   	1       	2020-06-04 09:58:01.94635 +1000 AEST 	deployed	minibroker-0.3.1
my-console	console      	1       	2020-06-01 09:16:14.497349 +1000 AEST	deployed	console-3.2.0       	3.2.0
nginx     	nginx-ingress	1       	2020-05-28 15:23:55.577671 +1000 AEST	deployed	nginx-ingress-1.36.3	0.30.0

$ kubectl get all -n minibroker
NAME                                         READY   STATUS    RESTARTS   AGE
pod/minibroker-minibroker-5fdb8b448f-qgw7d   2/2     Running   0          90s

NAME                            TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE
service/minibroker-minibroker   ClusterIP   10.39.254.247   <none>        80/TCP    90s

NAME                                    READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/minibroker-minibroker   1/1     1            1           91s

NAME                                               DESIRED   CURRENT   READY   AGE
replicaset.apps/minibroker-minibroker-5fdb8b448f   1         1         1       91s

Create Service Broker in TASK8s and enable access to the services. You will need to be logged in as ADMIN and provide the admin password as well

$ cf create-service-broker minibroker admin {ADMIN-PASSWORD} http://minibroker-minibroker.minibroker.svc.cluster.local
Creating service broker minibroker as admin...
OK

$ cf service-access
Getting service access as admin...
broker: minibroker
....

$ cf enable-service-access mysql
Enabling access to all plans of service mysql for all orgs as admin...
OK

$ cf enable-service-access mariadb
Enabling access to all plans of service mariadb for all orgs as admin...
OK

Verify the two MySQL services appear in the marketplace

$ cf marketplace --no-plans
Getting services from marketplace in org system / space development as admin...
OK

service   description              broker
mysql     Helm Chart for mysql     minibroker
mariadb   Helm Chart for mariadb   minibroker

TIP: Use 'cf marketplace -s SERVICE' to view descriptions of individual plans of a given service.

Create Service

Create a mariadb service as shown below

$ cf create-service mariadb 10-3-22 mariadb-svc -c '{"db": {"name": "my_database"}}'
Creating service instance mariadb-svc in org system / space development as admin...
OK

Create in progress. Use 'cf services' or 'cf service mariadb-svc' to check operation status.

Check the progress using a command as follows. Wait for it to say "create succeeded" before moving on to the next step

$ cf services
Getting services in org system / space development as admin...

name          service   plan      bound apps   last operation     broker       upgrade available
mariadb-svc   mariadb   10-3-22                create succeeded   minibroker

Deploy to TAS4K8S - Source Artifact Push

We should already have a packaged artifact as per a previous step that packaged JAR files exists as shown below

$ ls -la ./target/spring-book-service-0.0.1-SNAPSHOT.jar
-rw-r--r--  1 papicella  staff  48342891 Jun  4 10:22 ./target/spring-book-service-0.0.1-SNAPSHOT.jar

Inspect the "manifest.yaml" file to see what our deployment will look like for TAS4K8s. We are referencing the service "mariadb-svc" as per above

---
applications:
  - name: spring-book-service-api
    memory: 1024M
    instances: 1
    path: ./target/spring-book-service-0.0.1-SNAPSHOT.jar
    services:
      - mariadb-svc

Deploy to TAS4K8s as shown below using "cf push"

$ cf push -f manifest.yaml
Pushing from manifest to org system / space development as admin...
Using manifest file /Users/papicella/piv-projects/TAS4K8s/spring-book-service/manifest.yaml
Getting app info...
Creating app with these attributes...
+ name:        spring-book-service-api
  path:        /Users/papicella/pivotal/DemoProjects/spring-starter/pivotal/TAS4K8s/spring-book-service/target/spring-book-service-0.0.1-SNAPSHOT.jar
+ instances:   1
+ memory:      1G
  services:
+   mariadb-svc
  routes:
+   spring-book-service-api.apps.tas.lab.pasapples.me

Creating app spring-book-service-api...
Mapping routes...
Binding services...
Comparing local files to remote cache...
Packaging files to upload...
Uploading files...
 35.96 MiB / 35.96 MiB [====================================================================================================================================================================================================================] 100.00% 15s

Waiting for API to complete processing files...

Staging app and tracing logs...
   6 of 13 buildpacks participating
   org.cloudfoundry.openjdk                   v1.2.14
   org.cloudfoundry.jvmapplication            v1.1.12
   org.cloudfoundry.tomcat                    v1.3.18
   org.cloudfoundry.springboot                v1.2.13
   org.cloudfoundry.distzip                   v1.1.12
   org.cloudfoundry.springautoreconfiguration v1.1.11
   Previous image with name "harbor.lab.pasapples.me/library/6aa9e3df-3bb4-40a0-9041-41c430f2780d" not found

   Cloud Foundry OpenJDK Buildpack v1.2.14
   OpenJDK JRE 11.0.6: Contributing to layer
       Downloading from https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.6%!B(MISSING)10/OpenJDK11U-jre_x64_linux_hotspot_11.0.6_10.tar.gz
       Verifying checksum
       Expanding to /layers/org.cloudfoundry.openjdk/openjdk-jre
       Writing JAVA_HOME to shared
       Writing MALLOC_ARENA_MAX to shared
       Writing .profile.d/active-processor-count
   Java Security Properties v1.2.14: Contributing to layer
       Writing JAVA_OPTS to launch
   Security Provider Configurer v1.2.14: Contributing to layer
       Writing .profile.d/security-provider-classpath
       Writing .profile.d/security-provider-configurer
   Link-Local DNS v1.2.14: Contributing to layer
       Writing .profile.d/link-local-dns
   JVMKill Agent 1.16.0: Contributing to layer
       Downloading from https://java-buildpack.cloudfoundry.org/jvmkill/bionic/x86_64/jvmkill-1.16.0-RELEASE.so
       Verifying checksum
       Copying to /layers/org.cloudfoundry.openjdk/jvmkill
       Writing JAVA_OPTS to shared
   Class Counter v1.2.14: Contributing to layer
   Memory Calculator 4.0.0: Contributing to layer
       Downloading from https://java-buildpack.cloudfoundry.org/memory-calculator/bionic/x86_64/memory-calculator-4.0.0.tgz
       Verifying checksum
       Set $BPL_HEAD_ROOM to configure. Default 0
       Set $BPL_LOADED_CLASS_COUNT to configure. Default 35%!!(MISSING)o(MISSING)f classes
       Set $BPL_THREAD_COUNT to configure. Default 250
       Expanding to /layers/org.cloudfoundry.openjdk/memory-calculator
       Writing .profile.d/memory-calculator

   Cloud Foundry JVM Application Buildpack v1.1.12
   Executable JAR: Contributing to layer
       Writing CLASSPATH to shared
   Process types:
   executable-jar: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher
   task:           java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher
   web:            java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher

   Cloud Foundry Spring Boot Buildpack v1.2.13
   Spring Boot 2.3.1.BUILD-SNAPSHOT: Contributing to layer
       Writing CLASSPATH to shared
   5 application slices
   Process types:
   spring-boot: java -cp $CLASSPATH $JAVA_OPTS com.example.springbookservice.SpringBookServiceApplication
   task:        java -cp $CLASSPATH $JAVA_OPTS com.example.springbookservice.SpringBookServiceApplication
   web:         java -cp $CLASSPATH $JAVA_OPTS com.example.springbookservice.SpringBookServiceApplication

   Cloud Foundry Spring Auto-reconfiguration Buildpack v1.1.11
   Spring Auto-reconfiguration 2.11.0: Contributing to layer
       Downloading from https://repo.spring.io/release/org/cloudfoundry/java-buildpack-auto-reconfiguration/2.11.0.RELEASE/java-buildpack-auto-reconfiguration-2.11.0.RELEASE.jar
       Verifying checksum
       Copying to /layers/org.cloudfoundry.springautoreconfiguration/auto-reconfiguration
       Writing CLASSPATH to launch
   Adding layer 'launcher'
   Adding layer 'org.cloudfoundry.openjdk:class-counter'
   Adding layer 'org.cloudfoundry.openjdk:java-security-properties'
   Adding layer 'org.cloudfoundry.openjdk:jvmkill'
   Adding layer 'org.cloudfoundry.openjdk:link-local-dns'
   Adding layer 'org.cloudfoundry.openjdk:memory-calculator'
   Adding layer 'org.cloudfoundry.openjdk:openjdk-jre'
   Adding layer 'org.cloudfoundry.openjdk:security-provider-configurer'
   Adding layer 'org.cloudfoundry.jvmapplication:executable-jar'
   Adding layer 'org.cloudfoundry.springboot:spring-boot'
   Adding layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration'
   Adding 6/6 app layer(s)
   Adding layer 'config'
   *** Images (sha256:3b92cac4db3d826b790062814e8a2e54aa9ed1d8b16ac29a2196b895058f52d1):
   harbor.lab.pasapples.me/library/6aa9e3df-3bb4-40a0-9041-41c430f2780d
   harbor.lab.pasapples.me/library/6aa9e3df-3bb4-40a0-9041-41c430f2780d:b1.20200604.002942
   Adding cache layer 'org.cloudfoundry.jvmapplication:executable-jar'
   Adding cache layer 'org.cloudfoundry.springboot:spring-boot'
   Build successful

Waiting for app to start...

name:                spring-book-service-api
requested state:     started
isolation segment:   placeholder
routes:              spring-book-service-api.apps.tas.lab.pasapples.me
last uploaded:       Thu 04 Jun 10:30:47 AEST 2020
stack:
buildpacks:

type:           web
instances:      1/1
memory usage:   1024M
     state     since                  cpu    memory    disk      details
#0   running   2020-06-04T00:30:52Z   0.0%   0 of 1G   0 of 1G

Verify application is running as follows

 cf apps
Getting apps in org system / space development as admin...
OK

name                      requested state   instances   memory   disk   urls
spring-book-service-api   started           1/1         1G       1G     spring-book-service-api.apps.tas.lab.pasapples.me
$ http http://spring-book-service-api.apps.tas.lab.pasapples.me/api/book/1
HTTP/1.1 200 OK
content-type: application/json
date: Thu, 04 Jun 2020 00:39:56 GMT
server: istio-envoy
transfer-encoding: chunked
x-envoy-upstream-service-time: 277

{
    "author": "Peter Armstrong",
    "id": 1,
    "title": "Flexible Rails - Pas"
}

Deploy to TAS4K8S - Source Code Only

In order to deploy from source code only we have to move the manifest.yaml entry to a new name so CF CLI doesn't pick it up as shown below.

$ mv manifest.yaml manifest-ARTIFACT.yaml

To deploy using just the source code we would use a command as follows. This will be slower as kpack will need to download all the maven dependencies before it can build the container which the java buildpack will automatically do this for us

$ cf push source-spring-book-service-api -p ./ -m 1g -i 1
...

Downloaded from central: https://repo.maven.apache.org/maven2/com/fasterxml/jackson/module/jackson-module-parameter-names/2.11.0/jackson-module-parameter-names-2.11.0.jar (9.3 kB at 2.5 kB/s)
   Downloading from central: https://repo.maven.apache.org/maven2/org/springdoc/springdoc-openapi-webmvc-core/1.2.32/springdoc-openapi-webmvc-core-1.2.32.jar


Waiting for app to start...

name:                source-spring-book-service-api
requested state:     started
isolation segment:   placeholder
routes:              source-spring-book-service-api.apps.tas.lab.pasapples.me
last uploaded:       Thu 04 Jun 10:54:18 AEST 2020
stack:
buildpacks:

type:           web
instances:      1/1
memory usage:   1024M
     state     since                  cpu    memory    disk      details
#0   running   2020-06-04T00:54:21Z   0.0%   0 of 1G   0 of 1G

Test the application as follows.

$ http http://source-spring-book-service-api.apps.tas.lab.pasapples.me/api/book/1
HTTP/1.1 200 OK
content-type: application/json
date: Thu, 04 Jun 2020 00:57:02 GMT
server: istio-envoy
transfer-encoding: chunked
x-envoy-upstream-service-time: 365

{
    "author": "Peter Armstrong",
    "id": 1,
    "title": "Flexible Rails - Pas"
}

Using PivotalMySQLWeb

In order to verify we are using our Bound MySQL service we can use PivotalMySQLWeb application. To deploy this follow the steps at the GitHub project as follows

https://github.com/pivotal-cf/PivotalMySQLWeb

The manifest.yaml would like as follows to use the service we created above.

---
applications:
- name: pivotal-mysqlweb
  memory: 1024M
  instances: 1
  path: ./target/PivotalMySQLWeb-1.0.0-SNAPSHOT.jar
  services:
    - mariadb-svc

Deploy as follows.

$ cf push -f manifest-tas4k8s-minibroker.yaml
Pushing from manifest to org system / space development as admin...
Using manifest file /Users/papicella/piv-projects/PivotalMySQLWeb/manifest-tas4k8s-minibroker.yaml
Getting app info...
Creating app with these attributes...
+ name:        pivotal-mysqlweb
  path:        /Users/papicella/pivotal/DemoProjects/spring-starter/pivotal/PivotalMySQLWeb/target/PivotalMySQLWeb-1.0.0-SNAPSHOT.jar
+ instances:   1
+ memory:      1G
  services:
+   mariadb-svc
  routes:
+   pivotal-mysqlweb.apps.tas.lab.pasapples.me

Creating app pivotal-mysqlweb...
...

   Build successful

Waiting for app to start...

name:                pivotal-mysqlweb
requested state:     started
isolation segment:   placeholder
routes:              pivotal-mysqlweb.apps.tas.lab.pasapples.me
last uploaded:       Thu 04 Jun 11:06:18 AEST 2020
stack:
buildpacks:

type:           web
instances:      1/1
memory usage:   1024M
     state     since                  cpu    memory    disk      details
#0   running   2020-06-04T01:06:22Z   0.0%   0 of 1G   0 of 1G

To access the default username is "admin" and the default password is "cfmysqlweb"

alt tag

Pas Apicella [pasa at vmware.com] is an Advisory Application Platform Architect at VMware APJ

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