PLUGINS
Check installed plugins on a node:
curl -XGET 'http://localhost:9200/_nodes/NODE_NAME/plugins?pretty=yes'
SHARDS
Check shards recovery:
curl -XGET http://localhost:9200/_cat/recovery
Check shards status:
curl -XGET http://localhost:9200/_cat/shards
Deactivate/Activate dynamic rellocation:
curl -XPUT localhost:9200/_cluster/settings -d '{ "transient" : { "cluster.routing.allocation.enable" : "none" } }'
curl -XPUT 'localhost:9200/_cluster/settings' -d '{ "transient" : { "cluster.routing.allocation.enable" : "all" } }'
Relocating shard:
curl -XPOST 'localhost:9200/_cluster/reroute' -d '{
"commands" : [ {
"allocate" : {
"index" : "INDEX_NAME",
"shard" : SHARD_NUMBER,
"node" : "NODE",
"allow_primary" : true
}
}
]
}'
CLUSTER
Check cluster health:
curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'
Check pending tasks:
curl -XGET 'http://localhost:9200/_cluster/pending_tasks&pretty=true'
List nodes:
curl -XGET 'http://localhost:9200/_cat/nodes?v'
INDEX
Set replica count:
curl -XPUT 'localhost:9200/my_index/_settings' -d ' { "index" : { "number_of_replicas" : 4 } }'
List indexes:
curl 'localhost:9200/_cat/indices?v'
Delete index:
curl -XDELETE 'http://localhost:9200/twitter/'
MISC
Debugging startup problems:
Add a line into /etc/init.d/elasticsearch
to print out the the start command:
# Start Daemon
log_daemon_msg "sudo -u $ES_USER $DAEMON $DAEMON_OPTS" # <-- Add this line
start-stop-daemon --start -b --user "$ES_USER" -c "$ES_USER" --pidfile "$PID_FILE" --exec $DAEMON -- $DAEMON_OPTS
log_end_msg $?