server/src/main/java/org/elasticsearch/health/node/DiskHealthIndicatorService.java
public static final String NAME = "disk";
    private static final Logger logger = LogManager.getLogger(DiskHealthIndicatorService.class);
    private static final String IMPACT_INGEST_UNAVAILABLE_ID = "ingest_capability_unavailable";
    private static final String IMPACT_INGEST_AT_RISK_ID = "ingest_capability_at_risk";
    private static final String IMPACT_CLUSTER_STABILITY_AT_RISK_ID = "cluster_stability_at_risk";
    private static final String IMPACT_CLUSTER_FUNCTIONALITY_UNAVAILABLE_ID = "cluster_functionality_unavailable";