Elasticsearch Stuff
Cluster health
GET /_cat/health?v
GET /_cat/shards?v
GET /_cat/nodes?v
GET /_nodes/jvm?pretty
GET /_nodes/stats?pretty
GET /_cluster/allocation/explain?pretty
GET /_cat/recovery?v&active_only&h=index,stage,bytes_total,bytes_percent
Snapshots
GET /_snapshot
GET /_snapshot/<name>/*
Running tasks
GET /_tasks
GET /_tasks/<name>:<num>
'reindex' tasks are maybe worth looking out for before carrying out cluster work.