Configuring gnocchi metrics.
Overview
Atomia uses gnocchi for billing OpenStack usage. This article explains how to configure gnocchi 4.3+ correctly.
Defining archive policy
You need to configure archive policy with exactly one granularity equal to 60 seconds and mean aggregation method. For example, you can create an archive policy like this:
gnocchi archive-policy create vdc -d granularity:60s,points:86400 -b 3 -m mean
The command creates archive policy with name vdc, granularity equal to 60 seconds and mean aggregation method. It has timespan of 2 months and backwindow set to 3. You can use different values for timespan and backwindow. Atomia currently works only with the mean aggregation method.
Assigning archive policy to metrics
After configuring archive policy, you need to apply it on used metrics. One way to configure it is to edit /etc/ceilometer/gnocchi_resources.yaml file. You can set it as the default policy archive_policy_default: vdc for metrics. Also, you can set it for individual metrics archive_policy_name: ceilometer-low-rate.
Configuring custom metrics type
The metric type should be configured for custom metrics. The list below shows already configured metrics. If you use a metric that is not in the list, you will need to set a metric type for it. Valid metric type values are gauge, cumulative and delta. You can configure new metrics by defining a transformation file inside the directory C:\Program Files (x86)\Atomia\AutomationServer\Common\Modules\Transformation Files. An example of a transformation file Atomia.Provisioning.Modules.OpenStack.dll.GnocchiMetrics.config that defines three new metrics and sets their type:
<?xml version="1.0" encoding="utf-8"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<cloudData>
<gnocchiMetrics>
<metric name="atomia.volume.size.hdd" type="gauge" xdt:Transform="Insert"/>
<metric name="atomia.volume.size.ssd" type="gauge" xdt:Transform="Insert"/>
<metric name="atomia.network.incoming.bytes" type="cumulative" xdt:Transform="Insert"/>
</gnocchiMetrics>
</cloudData>
</configuration>
List with preconfigured metrics type:
memory memory.usage memory.resident cpu cpu.delta cpu_util vcpus disk.read.requests disk.read.requests.rate disk.write.requests disk.write.requests.rate disk.read.bytes disk.read.bytes.rate disk.write.bytes disk.write.bytes.rate disk.device.read.requests disk.device.read.requests.rate disk.device.write.requests disk.device.write.requests.rate disk.device.read.bytes disk.device.read.bytes .rate disk.device.write.bytes disk.device.write.bytes .rate disk.root.size disk.ephemeral.size disk.latency disk.iops disk.device.latency disk.device.iops disk.capacity disk.allocation disk.usage disk.device.capacity disk.device.allocation disk.device.usage network.incoming.bytes network.incoming.bytes.rate network.outgoing.bytes network.outgoing.bytes.rate network.incoming.packets network.incoming.packets.rate network.outgoing.packets network.outgoing.packets.rate cpu_l3_cache memory.bandwidth.total memory.bandwidth.local perf.cpu.cycles perf.instructions perf.cache.references perf.cache.misses network.incoming.packets.drop network.outgoing.packets.drop network.incoming.packets.error network.outgoing.packets.error memory.swap.in memory.swap.out disk.device.read.latency disk.device.write.latency image.size image.download image.serve storage.objects storage.objects.size storage.objects.containers storage.objects.incoming.bytes storage.objects.outgoing.bytes storage.containers.objects storage.containers.objects.size volume.size snapshot.size volume.provider.capacity.total volume.provider.capacity.free volume.provider.capacity.allocated volume.provider.capacity.provisioned volume.provider.capacity.virtual_free volume.provider.pool.capacity.total volume.provider.pool.capacity.free volume.provider.pool.capacity.allocated volume.provider.pool.capacity.provisioned volume.provider.pool.capacity.virtual_free
Gnocchi can be used together with generic billing for VPS described here.