def createAutostack(self, stackSpec):
""" Create an "autostack"
:param stackSpec: specification for an Autostack
:type stackSpec: dict
::
{
"name": "all_web_servers", # Autostack name
"aggSpec": { # aggregation spec
"datasource": "cloudwatch",
"region": "us-west-2",
"resourceType": "AWS::EC2::Instance"
"filters": { # resourceType-specific filter
"tag:Name":["*test*", "*htm-it*"], "tag:Description":["Blah", "foo"]
},
}
}
:returns: "autostack"
"""
if "name" not in stackSpec or stackSpec["name"].strip() == "":
raise ValueError("Must provide a valid name for the Autostack.")
aggSpec = stackSpec["aggSpec"]
filters = aggSpec["filters"]
self._validateFilters(filters)
region = aggSpec["region"]
# Enforce the instances per AutoStack limit
adapter = htm-it.app.adapters.datasource.createDatasourceAdapter(
aggSpec["datasource"])
instances = adapter.getMatchingResources(aggSpec)
if len(instances) > MAX_INSTANCES_PER_AUTOSTACK:
raise htm-it.app.exceptions.TooManyInstancesError(
"The filters specified match %i instances but the limit per "
"AutoStack is %i." % (len(instances), MAX_INSTANCES_PER_AUTOSTACK))
name = stackSpec["name"]
with self.connectionFactory() as conn:
autostackDict = repository.addAutostack(
conn,
name=name,
region=region,
filters=htmengine.utils.jsonEncode(filters))
autostackObj = repository.getAutostack(conn, autostackDict["uid"])
return autostackObj
def _createAutostackMetric(conn, name, region, filters):
autostackDict = repository.addAutostack(conn,
name=name,
region=region,
filters=json.dumps(filters))
modelSpec = {"modelParams": {},
"datasource": "autostack",
"metricSpec": {"slaveDatasource": "cloudwatch",
"slaveMetric": {"metric": "CPUUtilization",
"namespace": "AWS/EC2"},
"autostackId": autostackDict["uid"]}}
metricDict = repository.addMetric(
conn,
datasource="autostack",
name="CPUUtilization",
description=("CPUUtilization on HTM-IT Autostack {0} in us-west-2 "
"region").format(name),
server="Autostacks/{0}".format(autostackDict["uid"]),
location=region,
tag_name=name,
parameters=htmengine.utils.jsonEncode(modelSpec),
poll_interval=300,
status=MetricStatus.UNMONITORED)
repository.addMetricToAutostack(conn,
autostackDict["uid"],
metricDict["uid"])
autostackObj = type("MutableAutostack", (object,), autostackDict)()
autostackObj.filters = json.loads(autostackObj.filters)
metricObj = type("MutableMetric", (object,), metricDict)()
return autostackObj, metricObj