$ ${SOLR_ROOT}/bin/solr healthcheck -help Usage: solr healthcheck [-c collection] [-z zkHost] [-V] -c collection Collection to run healthcheck against. -z zkHost ZooKeeper connection string; default is localhost:9983 -V Enables more verbose output.

$ ${SOLR_ROOT}/bin/solr healthcheck -c collection6 -z "localhost:2181/solr"
Here's the output of running this command on my localhost where I have 2 Solr instances and 1 ZooKeeper instance.

{ "collection": "collection6", "status": "healthy", "numDocs": 0, "numShards": 2, "shards": [ { "shard": "shard1", "status": "healthy", "replicas": [ { "name": "core_node3", "url": "http://192.168.2.33:8984/solr/collection6_shard1_replica_n1/", "numDocs": 0, "status": "active", "uptime": "0 days, 0 hours, 24 minutes, 1 seconds", "memory": "219.1 MB (%42.8) of 512 MB" }, { "name": "core_node5", "url": "http://192.168.2.33:8983/solr/collection6_shard1_replica_n2/", "numDocs": 0, "status": "active", "uptime": "0 days, 0 hours, 24 minutes, 20 seconds", "memory": "310.6 MB (%60.7) of 512 MB", "leader": true } ] }, { "shard": "shard2", "status": "healthy", "replicas": [ { "name": "core_node7", "url": "http://192.168.2.33:8984/solr/collection6_shard2_replica_n4/", "numDocs": 0, "status": "active", "uptime": "0 days, 0 hours, 24 minutes, 1 seconds", "memory": "220.1 MB (%43) of 512 MB" }, { "name": "core_node8", "url": "http://192.168.2.33:8983/solr/collection6_shard2_replica_n6/", "numDocs": 0, "status": "active", "uptime": "0 days, 0 hours, 24 minutes, 20 seconds", "memory": "311.1 MB (%60.8) of 512 MB", "leader": true } ] } ] }