Screenshot_3.png
Install Collectd on all Compute node (or KVM node) or any node that installed Libvirt to collect the metrics (ram, cpu, iops,..) of VMs, then push to a Graphite server.
Workflow: Collectd -> Graphite -> Grafana
Collector Configuration Details
Install on CentOS 7
yum install epel-release -y
yum install collectd -y
yum install collectd-virt.x86_64 -y
Example /etc/collectd.conf file
Hostname "compute01"
FQDNLookup false
LoadPlugin write_graphite
LoadPlugin unixsock
LoadPlugin virt
Interval 120
<Plugin unixsock>
SocketFile "/var/run/collectd-unixsock"
SocketGroup "collectd"
SocketPerms "0770"
DeleteSocket false
</Plugin>
<Plugin "virt">
RefreshInterval 120
Connection "qemu:///system"
BlockDeviceFormat "target"
HostnameFormat "uuid"
InterfaceFormat "address"
PluginInstanceFormat name
ExtraStats "cpu_util disk_err domain_state job_stats_background perf vcpupin"
</Plugin>
<Plugin write_graphite>
<Node "graphite">
Host "<ip_graphite>"
Port "2003"
Protocol "tcp"
LogSendErrors true
Prefix "collectd.compute01."
#Postfix "collectd"
StoreRates true
AlwaysAppendDS false
EscapeCharacter "_"
</Node>
</Plugin>
Start service
systemctl restart collectd
