/ cat/allocation

/_cat/allocation
shards disk.indices disk.used disk.avail disk.total disk.percent host        ip          node
    25       31.5gb    37.5gb     21.2gb     58.7gb           63 10.12.7.36  10.12.7.36  elasticsearch-master-1
    25       47.3gb    53.2gb      5.4gb     58.7gb           90 10.12.15.48 10.12.15.48 elasticsearch-master-0

Related

• Elasticsearch index
• Disk section: GET / cluster/settings?include defaults

See also

• Elasticsearch: /_cat/, /_nodes/, /_cluster/, /_snapshot/, /_ilm/, /_xpack/, /_search/, /_security/, /my-index/, /_bulk
• Elasticsearch troubleshooting, Elasticsearch logs, yellow, Low disk watermark, in-memory shard lock, re-running