Host missing from icinga2 influxDB

When i try to connect icinga2 with grafana. only the icinga2 server service comes on grafana dashboard.there are 26 client server attached with my icinga2 server but grafana not shows that client host. and also no “hostname” measurement found in influxdb

influxdb measurement

show measurements
name: measurements
name

apt
aws-rds
cluster-zone
cpu
disk
dummy
hostalive
http
http_admin_health
http_agreement_health
http_report_health
http_sdp
http_ssl
http_sub_url
http_zoho_health
icinga
load
memory
ping
ping4
ping6
procs
ssh
swap
users

grafana ver 4.6
icinga2 ver 2.4

iccinga-influx config:-

/**

  • The InfluxdbWriter type writes check result metrics and
  • performance data to an InfluxDB HTTP API
    */

library “perfdata”

object InfluxdbWriter “influxdb” {
host = "127.0.0.1"
port = 8086
database = "icinga2"
username = "icinga"
password = "icinga"
host_template = {
measurement = "$host.check_command$"
tags = {
hostname = “$host.name$”
}
}
service_template = {
measurement = "$service.check_command$"
tags = {
hostname = "$host.name$"
service = “$service.name$”
}
}
enable_send_thresholds = true
enable_send_metadata = true
}