Apache Solr Reference Guide Covering Apache Solr 6.0

authentication from Solr, you need to set the following parameters:
Parameter Default Description
solr.hdfs.security.kerberos.enabled false Set to true to enable Kerberos authentication
solr.hdfs.security.kerberos.keytabfile N/A A keytab file contains pairs of
Kerberos principals and encrypted keys which
allows for password-less authentication when
Solr attempts to authenticate with secure
Hadoop.
This file will need to be present on all Solr
servers at the same path provided in this
parameter.
solr.hdfs.security.kerberos.principal N/A The Kerberos principal that Solr should use to
authenticate to secure Hadoop; the format of
a typical Kerberos V5 principal is: primary/i
nstance@realm
Example
Here is a sample solrconfig.xml configuration for storing Solr indexes on HDFS:
hdfs://host:port/solr
true
1
true
16384
true
true
16
192
If using Kerberos, you will need to add the three Kerberos related properties to the elem
ent in solrconfig.xml, such as:
...
true
/etc/krb5.keytab
solr/admin@KERBEROS.COM
Automatically Add Replicas in SolrCloud
One benefit to running Solr in HDFS is the ability to automatically add new replicas when the Overseer notices
that a shard has gone down. Because the "gone" index shards are stored in HDFS, the a new core will be
created and the new core will point to the existing indexes in HDFS.
Collections created using autoAddReplicas=true on a shared file system have automatic addition of replicas
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