Useful Solr Commands

solr_commands

Pre-requisites - 
1. You'd need Ruby installed on the host(rvm.io)
2. Set the solr host env variable
export SOLR_HOST=10.68.77.13:8983
3. Set the collection name env var 
export SOLR_COLLECTION=<your collection name>

DROP the Solr Collection
curl "http://$SOLR_HOST/solr/admin/collections?action=DELETE&name=$SOLR_COLLECTION"

CREATE Solr Collection -
curl "http://$SOLR_HOST/solr/admin/collections?action=CREATE&name=$SOLR_COLLECTION&numShards=24&replicationFactor=3&maxShardsPerNode=3&collection.configName=$SOLR_COLLECTION"
Create collection on selected nodes - 
 curl "http://$SOLR_HOST/solr/admin/collections?action=CREATE&name=$SOLR_COLLECTION&numShards=16&replicationFactor=1&maxShardsPerNode=3&collection.configName=$SOLR_COLLECTION&createNodeSet=10.68.77.13:8983_solr,10.68.77.14:8983_solr,10.68.77.15:8983_solr,10.68.77.16:8983_solr,10.68.77.17:8983_solr,10.68.77.18:8983_solr,10.68.77.19:8983_solr,10.68.77.20:8983_solr,10.68.77.45:8983_solr,10.68.77.46:8983_solr,10.68.77.47:8983_solr,10.68.77.48:8983_solr,10.68.77.49:8983_solr,10.68.77.50:8983_solr,10.68.77.51:8983_solr,10.68.77.52:8983_solr"

List all solr shards - 
curl "http://$SOLR_HOST/solr/admin/collections?action=clusterstatus&wt=json" |  tr -d '\n' | SOLR_COLLECTION=$SOLR_COLLECTION ruby -e 'require "json";  puts JSON.parse(STDIN.gets)["cluster"]["collections"][ENV["SOLR_COLLECTION"]]["shards"].keys'

Split all shards - 
curl "http://$SOLR_HOST/solr/admin/collections?action=clusterstatus&wt=json" |  tr -d '\n' | SOLR_COLLECTION=$SOLR_COLLECTION ruby -e 'require "json";  puts JSON.parse(STDIN.gets)["cluster"]["collections"][ENV["SOLR_COLLECTION"]]["shards"].keys' | while read LINE; do curl "http://$SOLR_HOST/solr/admin/collections?action=SPLITSHARD&collection=$SOLR_COLLECTION&shard=$LINE"; done

Delete a shard for the collection - 
curl "http://$SOLR_HOST/solr/admin/collections?action=DELETESHARD&shard=shard_name&collection=$SOLR_COLLECTION"

Add replica to all existing shards - 
curl "http://$SOLR_HOST/solr/admin/collections?action=clusterstatus&wt=json" |  tr -d '\n' | SOLR_COLLECTION=$SOLR_COLLECTION ruby -e 'require "json";  puts JSON.parse(STDIN.gets)["cluster"]["collections"][ENV["SOLR_COLLECTION"]]["shards"].keys' | while read LINE; do curl "http://$SOLR_HOST/solr/admin/collections?action=ADDREPLICA&collection=$SOLR_COLLECTION&shard=$LINE"; done

Delete 12 replica for shard1 for the collection - 
curl "http://$SOLR_HOST/solr/admin/collections?action=DELETEREPLICA&collection=$SOLR_COLLECTION&shard=shard1&count=6"

Delete replica for all for all shards for the collection - 
curl "http://$SOLR_HOST/solr/admin/collections?action=clusterstatus&wt=json" |  tr -d '\n' | SOLR_COLLECTION=$SOLR_COLLECTION ruby -e 'require "json";  puts JSON.parse(STDIN.gets)["cluster"]["collections"][ENV["SOLR_COLLECTION"]]["shards"].keys' | while read LINE; do curl "http://$SOLR_HOST/solr/admin/collections?action=DELETEREPLICA&collection=$SOLR_COLLECTION&shard=$LINE&count=8"; done


List leader distribution on available nodes - 
curl "http://$SOLR_HOST/solr/admin/collections?action=clusterstatus&wt=json" |  tr -d '\n' | SOLR_COLLECTION=$SOLR_COLLECTION ruby -e 'require "json";  JSON.parse(STDIN.gets)["cluster"]["collections"][ENV["SOLR_COLLECTION"]]["shards"].each{|k,v| v["replicas"].select{|k,v| 1 == 1}.values.map{|x| printf "%s, %s, %s\n",  k, x["node_name"], x["leader"] == "true"}}' | grep "false" | cut -f 2 -d, | sort | uniq