def test_update_metrics(self):
self.patch(metrics, "GLOBAL_LABELS", {"service_type": "rack"})
tempdir = self.useFixture(TempDirectory())
meminfo = Path(tempdir.path) / "meminfo"
meminfo.write_text(
dedent(
"""\
MemTotal: 123 Kb
SwapCached: 456 Kb
VmallocUsed: 789 Kb
HugePages_Total: 321
"""
)
)
prometheus_metrics = create_metrics(
node_metrics_definitions(),
registry=prometheus_client.CollectorRegistry(),
)
update_memory_metrics(prometheus_metrics, path=meminfo)
output = prometheus_metrics.generate_latest().decode("ascii")
self.assertIn(
'maas_node_mem_MemTotal{service_type="rack"} 123.0', output
)
self.assertIn(
'maas_node_mem_SwapCached{service_type="rack"} 456.0', output
)
self.assertIn(
'maas_node_mem_VmallocUsed{service_type="rack"} 789.0', output
)
self.assertIn(
'maas_node_mem_HugePages_Total{service_type="rack"} 321.0', output
)
def test_update_metrics(self):
self.patch(metrics, "GLOBAL_LABELS", {"service_type": "rack"})
tempdir = self.useFixture(TempDirectory())
stat = Path(tempdir.path) / "stat"
stat.write_text(
dedent("""\
cpu 111 222 333 444 555 666 7 888 9 11
cpu0 222 333 444 555 666 777 8 999 1 22
cpu1 222 333 444 555 666 777 8 999 1 22
other line
other line
"""))
prometheus_metrics = create_metrics(
node_metrics_definitions(),
registry=prometheus_client.CollectorRegistry(),
)
update_cpu_metrics(prometheus_metrics, path=stat)
output = prometheus_metrics.generate_latest().decode("ascii")
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="user"} 1.11',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="nice"} 2.22',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="system"} 3.33',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="idle"} 4.44',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="iowait"} 5.55',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="irq"} 6.66',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="softirq"} 0.07',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="steal"} 8.88',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="guest"} 0.09',
output,
)
self.assertIn(
'maas_node_cpu_time_total{service_type="rack",state="guest_nice"} 0.11',
output,
)
def test_definitions(self):
definitions = node_metrics_definitions()
# only one metric for memory
metrics_count = len(MEMINFO_FIELDS) + 1
self.assertEqual(len(definitions), metrics_count)
for definition in definitions:
if definition.name.startswith("maas_node_mem"):
self.assertEqual("Gauge", definition.type)
else:
self.assertEqual("Counter", definition.type)
'HTTP response size', ['method', 'path', 'status', 'op'],
buckets=[5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000]),
MetricDefinition('Histogram',
'maas_http_request_query_count',
'HTTP request query count',
['method', 'path', 'status', 'op'],
buckets=[10, 25, 50, 100, 200, 500]),
MetricDefinition('Histogram', 'maas_http_request_query_latency',
'HTTP request query latency',
['method', 'path', 'status', 'op']),
MetricDefinition('Histogram', 'maas_region_rack_rpc_call_latency',
'Latency of Region-Rack RPC call', ['call']),
MetricDefinition('Histogram', 'maas_websocket_call_latency',
'Latency of a Websocket handler call', ['call']),
# Common metrics
*node_metrics_definitions()
]
# Global for tracking global values for metrics label. These are set
# differently from rackd and regiond code, but this is defined here so the
# logic using it can be generic.
GLOBAL_LABELS = {
# The MAAS installation UUID, the same for all regions/racks within a
# deployment
'maas_uuid': None,
# The type of service (region/rack) exporting the metrics.
'service_type': None
}
def set_global_labels(**labels):