# Ansible Variables
### Overview
Ansible is the configuration management system used in Sunbird. The infrastructure setup, deployment of services and other configurations is handled primarily through ansible.
#### Updating the Private Repository with Hosts and Variables
Use the following git commands sequentially to clone and update your private GitHub repository -
```bash
git clone https://github.com/project-sunbird/sunbird-devops
cd sunbird-devops
git checkout tags/release-5.0.0 -b release-5.0.0
```
* Copy the directory `sunbird-devops/private_repo/ansible` to your private repo
* Update the files **common.yml**, **hosts**, and **secrets.yml** under **Core**, **KnowledgePlatform** and **DataPipeline** directories. After updating, push them to your private repo branch
* Your private repo structure starting from the root path should be exactly as shown below
```bash
ansible
└── inventory
└── dev
├── Core
│ ├── common.yml
│ ├── hosts
│ └── secrets.yml
├── DataPipeline
│ ├── common.yml
│ ├── hosts
│ └── secrets.yml
└── KnowledgePlatform
├── common.yml
├── hosts
└── secrets.yml
```
> Note:
>
> * The ansible inventory setup is a must before we can start to run jobs from the **Provision**, **ArtifactUpload** and **Deploy** directory in Jenkins. The **Build** directory on Jenkins does not depend on the ansible variables
> * It is highly recommended that you complete the ansible inventory updates before proceeding further
#### List of Servers with their Ansible Group Names
| Module | Servers | Service | Ansible Group Names |
| ------------------------- | ----------------------------------------------------------------------------------------------------- | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Build and Deploy | Server-1 | Jenkins Master | |
| Databases | Server-2 | Cassandra | cassandra-1, lp-cassandra, dp-cassandra, core-cassandra, report-cassandra, cassandra-node-1, cassandra |
| Postgres | postgresql-master-1, postgresql-master, postgres | | |
| Application Elasticsearch | es-1, composite-search-cluster, core-es-1, core-es, es-backup, es | | |
| Neo4j | learning-neo4j-node1, learning-neo4j-cluster | | |
| Mongo | mongo\_master, mongo | | |
| Knowledge Platform | Server-3 | Learning | learning1, learning, learningall |
| Redis | redis1, redis, redis-ps, redisall, lp-redis, lp-redis-ps, dp-redis, lms-redis, redis-exporter-targets | | |
| Zookeeper | processing-cluster-zookeepers, ingestion-cluster-zookeeper, raw-zookeeper, zookeeper | | |
| Kafka | processing-cluster-kafka, ingestion-cluster-kafka, kafka-1, kafka | | |
| Data Pipeline | Server-4 | Spark | spark |
| Kafka Indexer (Logstash) | kafka-indexer | | |
| InfluxDB | influxdb | | |
| Keycloak | keycloak-1, keycloak | | |
| Yarn | Server-5 | Yarn Master and Slave | yarn-master, yarn-slave, yarn |
| Other Services | Server-6 | Druid | druid-postgres, raw-coordinator, raw-overlord, raw-broker, raw-historical, raw-middlemanager, raw-graphite, rollup-coordinator, dp-druid-broker, broker, coordinator, druid-raw |
| Logs Elasticsearch | log-es-1, log-es-backup, log-es | | |
| | | | |
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