Delete a collection

If you have enabled Ranger for authorization, you must have Solr Admin permission to be able to delete collections.

Deleting a Solr collection deletes the collection and its index, but does not delete its configuration files.

If you are using Kerberos, kinit as a user with permission to delete the collection:
```
kinit solradmin@EXAMPLE.COM
```
Replace EXAMPLE.COM with your Kerberos realm name.
On a host running Solr Server, make sure that the SOLR_ZK_ENSEMBLE environment variable is set in /etc/solr/conf/solr-env.sh. For example:
```
$ cat /etc/solr/conf/solr-env.sh
export SOLR_ZK_ENSEMBLE=zk01.example.com:2181,zk02.example.com:2181,zk03.example.com:2181/solr
```
If you are using Cloudera Manager, this is automatically set on hosts with a Solr Server or Gateway role.
Delete the collection:
```
solrctl collection --delete logs
```