Script to Setup SolrCloud Environment

Senario
Here is the script how to create SolrCloud environment in local dev setup: a collection with numShards=2&replicationFactor=3 on 3 separate (local) nodes.

vms_solr_init creates folders: example/cloud/node{1,2,3}/solr, copy solr.xml and zoo.cfg to these folders, starts the server and creates the collection using admin collection apis.

Other scripts which start/stop are easier to implement.
The implementation

function solr_init()
{
  cd $SOLR_HOME
  mkdir -p $SOLR_NODE1_REL_HOME
  mkdir -p $SOLR_NODE2_REL_HOME
  mkdir -p $SOLR_NODE3_REL_HOME

  cp $SOLR_HOME/server/solr/solr.xml $SOLR_HOME/server/solr/zoo.cfg $SOLR_NODE1_REL_HOME
  cp $SOLR_HOME/server/solr/solr.xml $SOLR_HOME/server/solr/zoo.cfg $SOLR_NODE2_REL_HOME
  cp $SOLR_HOME/server/solr/solr.xml $SOLR_HOME/server/solr/zoo.cfg $SOLR_NODE3_REL_HOME

  solr_start
  data_solr_create
}

function solr_start() {
  if [[ `solr_pid` ]]
  then
    echo "solr is already running...";
  else
    echo "Starting solr-cloud... $SOLR_NODE1_PORT, $SOLR_NODE2_PORT, $SOLR_NODE3_PORT";
    $SOLR_HOME/bin/solr start -cloud -Dsolr.ltr.enabled=true -s "$SOLR_NODE1_REL_HOME" -p $SOLR_NODE1_PORT -h $SOLR_HOSTNAME;
    $SOLR_HOME/bin/solr start -cloud -Dsolr.ltr.enabled=true -s "$SOLR_NODE2_REL_HOME" -p $SOLR_NODE2_PORT -z $SOLR_ZKHOST -h $SOLR_HOSTNAME;
    $SOLR_HOME/bin/solr start -cloud -Dsolr.ltr.enabled=true -s "$SOLR_NODE3_REL_HOME" -p $SOLR_NODE3_PORT -z $SOLR_ZKHOST -h $SOLR_HOSTNAME;
  fi
}

function solr_stop() {
  echo "Stopping solr-cloud...";
  $SOLR_HOME/bin/solr stop -all;
}

function solr_restart() {
  echo "Restarting solr-cloud...";
  solr_stop && solr_start
}

function solr_pid() {
  pgrep -f "solr-6.4.0/server";
}

function data_solr_create() {
  # Go to the solr config directory
  currdir=`pwd`;
  cd "$WS/resource/solr";

  # Retrieve list of collections
  collections_list=`curl -s -v -X GET  -H 'Content-type:application/json' "$SOLR_NODE1_PORT/admin/collections?action=LIST&wt=json" | jq '.collections | join(" ")' `;

  # Create/update schema
  mv solrconfig solrconfig.old.`datetimestamp`;
  unzip -d solrconfig solr-core-config.zip;

  # create myCollection
  cp myCollection_solrconfig.xml solrconfig/conf/solrconfig.xml;
  cp myCollection_schema.xml solrconfig/conf/schema.xml;
  $SOLR_HOME/server/scripts/cloud-scripts/zkcli.sh -zkhost "$SOLR_ZKHOST" -cmd upconfig -confname myCollection -confdir "solrconfig/conf/";
  if grep -q "myCollection" <<< $collections_list; then
    curl -s -v -X GET "$SOLR_NODE1_ENDPOINT/admin/collections?action=RELOAD&name=myCollection";
    echo "Updated myCollection";
  else
    curl -s -v -X GET "$SOLR_NODE1_ENDPOINT/admin/collections?action=CREATE&name=myCollection&numShards=2&collection.configName=myCollection&replicationFactor=3&maxShardsPerNode=2";

    echo "Created myCollection";
  fi

  rm -rf solrconfig;
  cd $currdir;
}