Nginx's Log to Elasticsearch

logstash.conf

input {
        file {
                type => "nginx_access"
                codec=>json
                path => ["/var/log/nginx/**"]
                exclude => ["*.gz", "error.*"]
                discover_interval => 10
                sincedb_path => "/opt/logstash/.sincedb"
        }
}

filter {
        grok {
                match => [ "message","%{IPORHOST:clientip} %{USER:ident} %{USER:auth} \[%{TIMESTAMP_ISO8601:timestamp}\] \"(?:%{WORD:verb} %{NOTSPACE:request}(?: HTTP/%{NUMBER:httpversion})?|%{DATA:rawrequest})\" %{NUMBER:response} (?:%{NUMBER:bytes}|-) %{QS:referrer} %{QS:agent}"]
        }
}

output {
        elasticsearch {
                host => "HOSTNAME"
                index=>"ngx-access-%{+YYYY.MM.DD}"
                index_type => "nginx"
                cluster=>"ELASTICSEARCH CLUSTER NAME"
        }
}