Database as a service repository

This repository containes all the needed elements to deploy database as a service to kubernetes

Architecture

Redis is the chosen database technology and the final product will deploy autonomous redis cluster. In R0 schedule, single, non-redundant, non-persistent redis server is deployed

Subsystem structure

docker Contains dockerfiles to produce dbaas / testapplication container images charts Contais helm charts to deploy dbaas service / testapplication testapplication Contains dbaas test applications with various languages such as go, ..

Container image creation

The images must be built at subsystem root level

To produce dbaas service image:

docker build --file docker/Dockerfile.redis --tag redis-standalone .

To produce testapplication image:

docker build --file docker/Dockerfile.testapp --tag dbaas-test .

Deployment

DBaaS service

In R0, dbaas service is realized with single container running redis database. The database is configured to be non-persistent and non-redundant. The container exposes single port which is hardcoded to be 6379.

After dbaas service is installed, environment variables DBAAS_SERVICE_HOST and DBAAS_SERVICE_PORT are exposed to application containers. SDL library will automatically use these environment variables.

The service is installed via helm by using dbaas-service chart. Modify the values accordingly before installation (repository location, image name, ..)

helm install ./dbaas-service

DBaaS test application

Test application is installed via helm by using dbaas-test chart. Modify the values accordingly before installation (repository location, image name, ..)

helm install ./dbaas-test

Testing

Make sure that dbaas-service and dbaas-test application are deployed:

>>helm ls
NAME            REVISION  UPDATED                    STATUS     CHART                   APP VERSION	NAMESPACE
angry-greyhound	1         Thu Mar 21 11:36:23 2019   DEPLOYED	dbaas-test-0.1.0	1.0             default
loitering-toad  1         Thu Mar 21 11:35:21 2019   DEPLOYED	dbaas-0.1.0             1.0             default

Check the deployed pods

>>kubectl get pods
NAME                                READY   STATUS    RESTARTS   AGE
dbaas-test-app-7695dbb9ff-qn8c2     1/1     Running   0          5s
redis-standalone-78978f4c6f-54b2s   1/1     Running   0          66s

Connect to the test application container:

kubectl exec -it dbaas-test-app-7695dbb9ff-qn8c2 -- /bin/bash

In test application container:

The environment variables for database backend should be set:

>>printenv
DBAAS_SERVICE_HOST=10.108.103.51
DBAAS_SERVICE_PORT=6379

Go test application using preliminary go SDL-API should be able to perform reads and writes:

>>./testapp
key1:data1
key3:%!s(<nil>)
key2:data2
num1:1
num2:2
-------------
mix2:2
num1:1
num2:2
pair1:data1
array1:adata1
mix1:data1
mix3:data3
mix4:4
arr1:
key1:data1
key2:data2
pair2:data2
array2:adata2

Redis server can be pinged with redis-cli:

>>redis-cli -h $DBAAS_SERVICE_HOST -p $DBAAS_SERVICE_PORT ping
PONG

License

This project is licensed under the Apache License 2.0 - see the LICENSE.md file for details

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