class _ElastiCacheService(_AwsService):
service_name = 'ElastiCache'
def connect(self):
if self.conn is None:
logger.debug("Connecting to %s", self.service_name)
self.conn = ElastiCacheConnection()
logger.info("Connected to %s", self.service_name)
def find_usage(self):
"""
Determine the current usage for each limit of this service,
and update corresponding Limit via
:py:meth:`~.AwsLimit._add_current_usage`.
"""
logger.debug("Checking usage for service %s", self.service_name)
self.connect()
for lim in self.limits.values():
lim._reset_usage()
self._find_usage_nodes()
self._find_usage_subnet_groups()
self._find_usage_parameter_groups()
self._find_usage_security_groups()
self._have_usage = True
logger.debug("Done checking usage.")
def _find_usage_nodes(self):
"""find usage for cache nodes"""
nodes = 0
clusters = self.conn.describe_cache_clusters(show_cache_node_info=True)[
'DescribeCacheClustersResponse']['DescribeCacheClustersResult'][
'CacheClusters']
for cluster in clusters:
nodes += len(cluster['CacheNodes'])
self.limits['Nodes per Cluster']._add_current_usage(
len(cluster['CacheNodes']),
aws_type='AWS::ElastiCache::CacheCluster',
resource_id=cluster['CacheClusterId'],
)
self.limits['Clusters']._add_current_usage(
len(clusters),
aws_type='AWS::ElastiCache::CacheCluster'
)
self.limits['Nodes']._add_current_usage(
nodes,
aws_type='AWS::ElastiCache::CacheNode'
)
def _find_usage_subnet_groups(self):
"""find usage for elasticache subnet groups"""
groups = self.conn.describe_cache_subnet_groups()[
'DescribeCacheSubnetGroupsResponse'][
'DescribeCacheSubnetGroupsResult'][
'CacheSubnetGroups']
self.limits['Subnet Groups']._add_current_usage(
len(groups),
aws_type='AWS::ElastiCache::SubnetGroup'
)
def _find_usage_parameter_groups(self):
"""find usage for elasticache parameter groups"""
groups = self.conn.describe_cache_parameter_groups()[
'DescribeCacheParameterGroupsResponse'][
'DescribeCacheParameterGroupsResult'][
'CacheParameterGroups']
self.limits['Parameter Groups']._add_current_usage(
len(groups),
aws_type='AWS::ElastiCache::ParameterGroup'
)
def _find_usage_security_groups(self):
"""find usage for elasticache security groups"""
groups = self.conn.describe_cache_security_groups()[
'DescribeCacheSecurityGroupsResponse'][
'DescribeCacheSecurityGroupsResult'][
'CacheSecurityGroups']
self.limits['Security Groups']._add_current_usage(
len(groups),
aws_type='WS::ElastiCache::SecurityGroup'
)
def get_limits(self):
"""
Return all known limits for this service, as a dict of their names
to :py:class:`~.AwsLimit` objects.
:returns: dict of limit names to :py:class:`~.AwsLimit` objects
:rtype: dict
"""
if self.limits != {}:
return self.limits
limits = {}
limits['Nodes'] = AwsLimit(
'Nodes',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::CacheNode',
)
limits['Clusters'] = AwsLimit(
'Clusters',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::CacheCluster',
)
limits['Nodes per Cluster'] = AwsLimit(
'Nodes per Cluster',
self,
20,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::CacheNode',
)
limits['Subnet Groups'] = AwsLimit(
'Subnet Groups',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::SubnetGroup',
)
limits['Parameter Groups'] = AwsLimit(
'Parameter Groups',
self,
20,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::ParameterGroup',
)
limits['Security Groups'] = AwsLimit(
'Security Groups',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='WS::ElastiCache::SecurityGroup',
)
self.limits = limits
return limits
def required_iam_permissions(self):
"""
Return a list of IAM Actions required for this Service to function
properly. All Actions will be shown with an Effect of "Allow"
and a Resource of "*".
:returns: list of IAM Action strings
:rtype: list
"""
return [
"elasticache:DescribeCacheClusters",
"elasticache:DescribeCacheParameterGroups",
"elasticache:DescribeCacheSecurityGroups",
"elasticache:DescribeCacheSubnetGroups",
]
class _ElastiCacheService(_AwsService):
service_name = 'ElastiCache'
def connect(self):
"""Connect to API if not already connected; set self.conn."""
if self.conn is not None:
return
elif self.region:
self.conn = self.connect_via(boto.elasticache.connect_to_region)
else:
self.conn = ElastiCacheConnection()
def find_usage(self):
"""
Determine the current usage for each limit of this service,
and update corresponding Limit via
:py:meth:`~.AwsLimit._add_current_usage`.
"""
logger.debug("Checking usage for service %s", self.service_name)
self.connect()
for lim in self.limits.values():
lim._reset_usage()
self._find_usage_nodes()
self._find_usage_subnet_groups()
self._find_usage_parameter_groups()
self._find_usage_security_groups()
self._have_usage = True
logger.debug("Done checking usage.")
def _find_usage_nodes(self):
"""find usage for cache nodes"""
nodes = 0
clusters = self.conn.describe_cache_clusters(show_cache_node_info=True)[
'DescribeCacheClustersResponse']['DescribeCacheClustersResult'][
'CacheClusters']
for cluster in clusters:
nodes += len(cluster['CacheNodes'])
self.limits['Nodes per Cluster']._add_current_usage(
len(cluster['CacheNodes']),
aws_type='AWS::ElastiCache::CacheCluster',
resource_id=cluster['CacheClusterId'],
)
self.limits['Clusters']._add_current_usage(
len(clusters),
aws_type='AWS::ElastiCache::CacheCluster'
)
self.limits['Nodes']._add_current_usage(
nodes,
aws_type='AWS::ElastiCache::CacheNode'
)
def _find_usage_subnet_groups(self):
"""find usage for elasticache subnet groups"""
groups = self.conn.describe_cache_subnet_groups()[
'DescribeCacheSubnetGroupsResponse'][
'DescribeCacheSubnetGroupsResult'][
'CacheSubnetGroups']
self.limits['Subnet Groups']._add_current_usage(
len(groups),
aws_type='AWS::ElastiCache::SubnetGroup'
)
def _find_usage_parameter_groups(self):
"""find usage for elasticache parameter groups"""
groups = self.conn.describe_cache_parameter_groups()[
'DescribeCacheParameterGroupsResponse'][
'DescribeCacheParameterGroupsResult'][
'CacheParameterGroups']
self.limits['Parameter Groups']._add_current_usage(
len(groups),
aws_type='AWS::ElastiCache::ParameterGroup'
)
def _find_usage_security_groups(self):
"""find usage for elasticache security groups"""
try:
# If EC2-Classic isn't available (e.g., a new account)
# this method will fail with:
# Code: "InvalidParameterValue"
# Message: "Use of cache security groups is not permitted in
# this API version for your account."
# Type: "Sender"
groups = self.conn.describe_cache_security_groups()[
'DescribeCacheSecurityGroupsResponse'][
'DescribeCacheSecurityGroupsResult'][
'CacheSecurityGroups']
except BotoServerError:
logger.debug("caught BotoServerError checking ElastiCache security "
"groups (account without EC2-Classic?)")
groups = []
self.limits['Security Groups']._add_current_usage(
len(groups),
aws_type='WS::ElastiCache::SecurityGroup'
)
def get_limits(self):
"""
Return all known limits for this service, as a dict of their names
to :py:class:`~.AwsLimit` objects.
:returns: dict of limit names to :py:class:`~.AwsLimit` objects
:rtype: dict
"""
if self.limits != {}:
return self.limits
limits = {}
limits['Nodes'] = AwsLimit(
'Nodes',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::CacheNode',
)
limits['Clusters'] = AwsLimit(
'Clusters',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::CacheCluster',
)
limits['Nodes per Cluster'] = AwsLimit(
'Nodes per Cluster',
self,
20,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::CacheNode',
)
limits['Subnet Groups'] = AwsLimit(
'Subnet Groups',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::SubnetGroup',
)
limits['Parameter Groups'] = AwsLimit(
'Parameter Groups',
self,
20,
self.warning_threshold,
self.critical_threshold,
limit_type='AWS::ElastiCache::ParameterGroup',
)
limits['Security Groups'] = AwsLimit(
'Security Groups',
self,
50,
self.warning_threshold,
self.critical_threshold,
limit_type='WS::ElastiCache::SecurityGroup',
)
self.limits = limits
return limits
def required_iam_permissions(self):
"""
Return a list of IAM Actions required for this Service to function
properly. All Actions will be shown with an Effect of "Allow"
and a Resource of "*".
:returns: list of IAM Action strings
:rtype: list
"""
return [
"elasticache:DescribeCacheClusters",
"elasticache:DescribeCacheParameterGroups",
"elasticache:DescribeCacheSecurityGroups",
"elasticache:DescribeCacheSubnetGroups",
]
