DevOps-Assigment

Deployed stack consists of three Redis instances, two Redis Sentinels, three Redis exporters, Prometheus, Grafana and Java Redis client.

Java client communicates with Redis Sentinels to get the location of Redis Master instance. In case Redis Master goes down failover will happen and one of the other two instances will become the new master.

To monitor the stack we use Prometheus server that scrapes metrics from Redis exporters. Visualization of the metrics is done using Grafana. Grafana instance comes with preconfigured datasource and Redis Dashboard.

Component Overview

Component	Image	Instances
Redis	redis:5.0	3
Redis Sentinel	redis:5.0	2
Redis exporter	oliver006/redis_exporter:v1.5.2-alpine	3
Java Redis client	openjdk:8-slim	1
Prometheus	prom/prometheus:v2.16.0	1
Grafana	grafana/grafana:6.7.0	1

Architecture Overview

Requirements

Docker, Docker Compose, Java JDK 8 and Apache Maven are required to run this stack.

Installation

Use Maven to build Java Redis Client.

mvn -f .\docker\java\infobip-redis-service\pom.xml package

Build Docker images using docker-compose.

docker-compose -f .\docker\docker-compose.yml build

Pull all required images using docker-compose.

docker-compose -f .\docker\docker-compose.yml pull

Test

To test Java Redis Client run integration tests using Maven.

mvn -f .\docker\java\infobip-redis-service\pom.xml test

Deployment

Deploy stack using docker-compose.

docker-compose -f .\docker\docker-compose.yml up

To run docker containers in detached mode:

docker-compose -f .\docker\docker-compose.yml up -d

Usage

Check Grafana for Redis metrics using this link.

To access Grafana use username admin and password secret. Password can be configured in grafana service section in docker-compose.yml. Redis dashboard can be found in General folder.

For interaction with Redis Client go to this Swagger UI link.