# Environment Variables

<table><thead><tr><th>Variable Name</th><th>Type</th><th width="221">Revelance</th><th width="112">Required</th><th>Default</th></tr></thead><tbody><tr><td>REPMGR_PRIMARY_HOST</td><td>String</td><td>Service name of the primary replication manager host (PostgreSQL)</td><td>No</td><td>postgres-1</td></tr><tr><td>REPMGR_PARTNER_NODES</td><td>String</td><td>Service names of the replicas of PostgreSQL</td><td>Yes</td><td>postgres-1</td></tr><tr><td>POSTGRES_REPLICA_SET</td><td>String</td><td>PostgreSQL replica set (host and port of the replicas)</td><td>Yes</td><td>postgres-1:5432</td></tr><tr><td>HAPI_FHIR_CPU_LIMIT</td><td>Number</td><td>CPU limit usage for hapi-fhir service</td><td>No</td><td>0 (unlimited)</td></tr><tr><td>HAPI_FHIR_CPU_RESERVE</td><td>Number</td><td>Reserved CPU usage for hapi-fhir service</td><td>No</td><td>0.05</td></tr><tr><td>HAPI_FHIR_MEMORY_LIMIT</td><td>String</td><td>RAM limit usage for hapi-fhir service</td><td>No</td><td>3G</td></tr><tr><td>HAPI_FHIR_MEMORY_RESERVE</td><td>String</td><td>Reserved RAM usage for hapi-fhir service</td><td>No</td><td>500M</td></tr><tr><td>HF_POSTGRES_CPU_LIMIT</td><td>Number</td><td>CPU limit usage for postgreSQL service</td><td>No</td><td>0 (unlimited)</td></tr><tr><td>HF_POSTGRES_CPU_RESERVE</td><td>Number</td><td>Reserved CPU usage for postgreSQL service</td><td>No</td><td>0.05</td></tr><tr><td>HF_POSTGRES_MEMORY_LIMIT</td><td>String</td><td>RAM limit usage for postgreSQL service</td><td>No</td><td>3G</td></tr><tr><td>HF_POSTGRES_MEMORY_RESERVE</td><td>String</td><td>Reserved RAM usage for hapi-fhir service</td><td>No</td><td>500M</td></tr><tr><td>HAPI_FHIR_INSTANCES</td><td>Number</td><td>Number of hapi-fhir service replicas </td><td>No</td><td>1</td></tr><tr><td>HF_POSTGRESQL_USERNAME</td><td>String</td><td>Hapi-fhir PostgreSQL username</td><td>Yes</td><td>admin</td></tr><tr><td>HF_POSTGRESQL_PASSWORD</td><td>String</td><td>Hapi-fhir PostgreSQL password</td><td>Yes</td><td>instant101</td></tr><tr><td>HF_POSTGRESQL_DATABASE</td><td>String</td><td>Hapi-fhir PostgreSQL database</td><td>No</td><td>hapi</td></tr><tr><td>REPMGR_PASSWORD</td><td>Strign</td><td>hapi-fhir PostgreSQL Replication Manager username </td><td>Yes</td><td></td></tr></tbody></table>


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