2017/04/04 - Amazon CloudWatch - 3 updated api methods
Changes Amazon Web Services announced the immediate availability of two additional alarm configuration rules for Amazon CloudWatch Alarms. The first rule is for configuring missing data treatment. Customers have the options to treat missing data as alarm threshold breached, alarm threshold not breached, maintain alarm state and the current default treatment. The second rule is for alarms based on percentiles metrics that can trigger unnecassarily if the percentile is calculated from a small number of samples. The new rule can treat percentiles with low sample counts as same as missing data. If the first rule is enabled, the same treatment will be applied when an alarm encounters a percentile with low sample counts.
{'MetricAlarms': {'EvaluateLowSampleCountPercentile': 'string',
'TreatMissingData': 'string'}}
Retrieves the specified alarms. If no alarms are specified, all alarms are returned. Alarms can be retrieved by using only a prefix for the alarm name, the alarm state, or a prefix for any action.
See also: AWS API Documentation
Request Syntax
client.describe_alarms(
AlarmNames=[
'string',
],
AlarmNamePrefix='string',
StateValue='OK'|'ALARM'|'INSUFFICIENT_DATA',
ActionPrefix='string',
MaxRecords=123,
NextToken='string'
)
list
The names of the alarms.
(string) --
string
The alarm name prefix. You cannot specify AlarmNames if this parameter is specified.
string
The state value to be used in matching alarms.
string
The action name prefix.
integer
The maximum number of alarm descriptions to retrieve.
string
The token returned by a previous call to indicate that there is more data available.
dict
Response Syntax
{
'MetricAlarms': [
{
'AlarmName': 'string',
'AlarmArn': 'string',
'AlarmDescription': 'string',
'AlarmConfigurationUpdatedTimestamp': datetime(2015, 1, 1),
'ActionsEnabled': True|False,
'OKActions': [
'string',
],
'AlarmActions': [
'string',
],
'InsufficientDataActions': [
'string',
],
'StateValue': 'OK'|'ALARM'|'INSUFFICIENT_DATA',
'StateReason': 'string',
'StateReasonData': 'string',
'StateUpdatedTimestamp': datetime(2015, 1, 1),
'MetricName': 'string',
'Namespace': 'string',
'Statistic': 'SampleCount'|'Average'|'Sum'|'Minimum'|'Maximum',
'ExtendedStatistic': 'string',
'Dimensions': [
{
'Name': 'string',
'Value': 'string'
},
],
'Period': 123,
'Unit': 'Seconds'|'Microseconds'|'Milliseconds'|'Bytes'|'Kilobytes'|'Megabytes'|'Gigabytes'|'Terabytes'|'Bits'|'Kilobits'|'Megabits'|'Gigabits'|'Terabits'|'Percent'|'Count'|'Bytes/Second'|'Kilobytes/Second'|'Megabytes/Second'|'Gigabytes/Second'|'Terabytes/Second'|'Bits/Second'|'Kilobits/Second'|'Megabits/Second'|'Gigabits/Second'|'Terabits/Second'|'Count/Second'|'None',
'EvaluationPeriods': 123,
'Threshold': 123.0,
'ComparisonOperator': 'GreaterThanOrEqualToThreshold'|'GreaterThanThreshold'|'LessThanThreshold'|'LessThanOrEqualToThreshold',
'TreatMissingData': 'string',
'EvaluateLowSampleCountPercentile': 'string'
},
],
'NextToken': 'string'
}
Response Structure
(dict) --
MetricAlarms (list) --
The information for the specified alarms.
(dict) --
Represents an alarm.
AlarmName (string) --
The name of the alarm.
AlarmArn (string) --
The Amazon Resource Name (ARN) of the alarm.
AlarmDescription (string) --
The description of the alarm.
AlarmConfigurationUpdatedTimestamp (datetime) --
The time stamp of the last update to the alarm configuration.
ActionsEnabled (boolean) --
Indicates whether actions should be executed during any changes to the alarm state.
OKActions (list) --
The actions to execute when this alarm transitions to the OK state from any other state. Each action is specified as an Amazon Resource Name (ARN).
(string) --
AlarmActions (list) --
The actions to execute when this alarm transitions to the ALARM state from any other state. Each action is specified as an Amazon Resource Name (ARN).
(string) --
InsufficientDataActions (list) --
The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state from any other state. Each action is specified as an Amazon Resource Name (ARN).
(string) --
StateValue (string) --
The state value for the alarm.
StateReason (string) --
An explanation for the alarm state, in text format.
StateReasonData (string) --
An explanation for the alarm state, in JSON format.
StateUpdatedTimestamp (datetime) --
The time stamp of the last update to the alarm state.
MetricName (string) --
The name of the metric associated with the alarm.
Namespace (string) --
The namespace of the metric associated with the alarm.
Statistic (string) --
The statistic for the metric associated with the alarm, other than percentile. For percentile statistics, use ExtendedStatistic .
ExtendedStatistic (string) --
The percentile statistic for the metric associated with the alarm. Specify a value between p0.0 and p100.
Dimensions (list) --
The dimensions for the metric associated with the alarm.
(dict) --
Expands the identity of a metric.
Name (string) --
The name of the dimension.
Value (string) --
The value representing the dimension measurement.
Period (integer) --
The period, in seconds, over which the statistic is applied.
Unit (string) --
The unit of the metric associated with the alarm.
EvaluationPeriods (integer) --
The number of periods over which data is compared to the specified threshold.
Threshold (float) --
The value to compare with the specified statistic.
ComparisonOperator (string) --
The arithmetic operation to use when comparing the specified statistic and threshold. The specified statistic value is used as the first operand.
TreatMissingData (string) --
EvaluateLowSampleCountPercentile (string) --
NextToken (string) --
The token that marks the start of the next batch of returned results.
{'MetricAlarms': {'EvaluateLowSampleCountPercentile': 'string',
'TreatMissingData': 'string'}}
Retrieves the alarms for the specified metric. Specify a statistic, period, or unit to filter the results.
See also: AWS API Documentation
Request Syntax
client.describe_alarms_for_metric(
MetricName='string',
Namespace='string',
Statistic='SampleCount'|'Average'|'Sum'|'Minimum'|'Maximum',
ExtendedStatistic='string',
Dimensions=[
{
'Name': 'string',
'Value': 'string'
},
],
Period=123,
Unit='Seconds'|'Microseconds'|'Milliseconds'|'Bytes'|'Kilobytes'|'Megabytes'|'Gigabytes'|'Terabytes'|'Bits'|'Kilobits'|'Megabits'|'Gigabits'|'Terabits'|'Percent'|'Count'|'Bytes/Second'|'Kilobytes/Second'|'Megabytes/Second'|'Gigabytes/Second'|'Terabytes/Second'|'Bits/Second'|'Kilobits/Second'|'Megabits/Second'|'Gigabits/Second'|'Terabits/Second'|'Count/Second'|'None'
)
string
[REQUIRED]
The name of the metric.
string
[REQUIRED]
The namespace of the metric.
string
The statistic for the metric, other than percentiles. For percentile statistics, use ExtendedStatistics .
string
The percentile statistic for the metric. Specify a value between p0.0 and p100.
list
The dimensions associated with the metric. If the metric has any associated dimensions, you must specify them in order for the call to succeed.
(dict) --
Expands the identity of a metric.
Name (string) -- [REQUIRED]
The name of the dimension.
Value (string) -- [REQUIRED]
The value representing the dimension measurement.
integer
The period, in seconds, over which the statistic is applied.
string
The unit for the metric.
dict
Response Syntax
{
'MetricAlarms': [
{
'AlarmName': 'string',
'AlarmArn': 'string',
'AlarmDescription': 'string',
'AlarmConfigurationUpdatedTimestamp': datetime(2015, 1, 1),
'ActionsEnabled': True|False,
'OKActions': [
'string',
],
'AlarmActions': [
'string',
],
'InsufficientDataActions': [
'string',
],
'StateValue': 'OK'|'ALARM'|'INSUFFICIENT_DATA',
'StateReason': 'string',
'StateReasonData': 'string',
'StateUpdatedTimestamp': datetime(2015, 1, 1),
'MetricName': 'string',
'Namespace': 'string',
'Statistic': 'SampleCount'|'Average'|'Sum'|'Minimum'|'Maximum',
'ExtendedStatistic': 'string',
'Dimensions': [
{
'Name': 'string',
'Value': 'string'
},
],
'Period': 123,
'Unit': 'Seconds'|'Microseconds'|'Milliseconds'|'Bytes'|'Kilobytes'|'Megabytes'|'Gigabytes'|'Terabytes'|'Bits'|'Kilobits'|'Megabits'|'Gigabits'|'Terabits'|'Percent'|'Count'|'Bytes/Second'|'Kilobytes/Second'|'Megabytes/Second'|'Gigabytes/Second'|'Terabytes/Second'|'Bits/Second'|'Kilobits/Second'|'Megabits/Second'|'Gigabits/Second'|'Terabits/Second'|'Count/Second'|'None',
'EvaluationPeriods': 123,
'Threshold': 123.0,
'ComparisonOperator': 'GreaterThanOrEqualToThreshold'|'GreaterThanThreshold'|'LessThanThreshold'|'LessThanOrEqualToThreshold',
'TreatMissingData': 'string',
'EvaluateLowSampleCountPercentile': 'string'
},
]
}
Response Structure
(dict) --
MetricAlarms (list) --
The information for each alarm with the specified metric.
(dict) --
Represents an alarm.
AlarmName (string) --
The name of the alarm.
AlarmArn (string) --
The Amazon Resource Name (ARN) of the alarm.
AlarmDescription (string) --
The description of the alarm.
AlarmConfigurationUpdatedTimestamp (datetime) --
The time stamp of the last update to the alarm configuration.
ActionsEnabled (boolean) --
Indicates whether actions should be executed during any changes to the alarm state.
OKActions (list) --
The actions to execute when this alarm transitions to the OK state from any other state. Each action is specified as an Amazon Resource Name (ARN).
(string) --
AlarmActions (list) --
The actions to execute when this alarm transitions to the ALARM state from any other state. Each action is specified as an Amazon Resource Name (ARN).
(string) --
InsufficientDataActions (list) --
The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state from any other state. Each action is specified as an Amazon Resource Name (ARN).
(string) --
StateValue (string) --
The state value for the alarm.
StateReason (string) --
An explanation for the alarm state, in text format.
StateReasonData (string) --
An explanation for the alarm state, in JSON format.
StateUpdatedTimestamp (datetime) --
The time stamp of the last update to the alarm state.
MetricName (string) --
The name of the metric associated with the alarm.
Namespace (string) --
The namespace of the metric associated with the alarm.
Statistic (string) --
The statistic for the metric associated with the alarm, other than percentile. For percentile statistics, use ExtendedStatistic .
ExtendedStatistic (string) --
The percentile statistic for the metric associated with the alarm. Specify a value between p0.0 and p100.
Dimensions (list) --
The dimensions for the metric associated with the alarm.
(dict) --
Expands the identity of a metric.
Name (string) --
The name of the dimension.
Value (string) --
The value representing the dimension measurement.
Period (integer) --
The period, in seconds, over which the statistic is applied.
Unit (string) --
The unit of the metric associated with the alarm.
EvaluationPeriods (integer) --
The number of periods over which data is compared to the specified threshold.
Threshold (float) --
The value to compare with the specified statistic.
ComparisonOperator (string) --
The arithmetic operation to use when comparing the specified statistic and threshold. The specified statistic value is used as the first operand.
TreatMissingData (string) --
EvaluateLowSampleCountPercentile (string) --
{'EvaluateLowSampleCountPercentile': 'string', 'TreatMissingData': 'string'}
Creates or updates an alarm and associates it with the specified metric. Optionally, this operation can associate one or more Amazon SNS resources with the alarm.
When this operation creates an alarm, the alarm state is immediately set to INSUFFICIENT_DATA . The alarm is evaluated and its state is set appropriately. Any actions associated with the state are then executed.
When you update an existing alarm, its state is left unchanged, but the update completely overwrites the previous configuration of the alarm.
If you are an AWS Identity and Access Management (IAM) user, you must have Amazon EC2 permissions for some operations:
ec2:DescribeInstanceStatus and ec2:DescribeInstances for all alarms on EC2 instance status metrics
ec2:StopInstances for alarms with stop actions
ec2:TerminateInstances for alarms with terminate actions
ec2:DescribeInstanceRecoveryAttribute and ec2:RecoverInstances for alarms with recover actions
If you have read/write permissions for Amazon CloudWatch but not for Amazon EC2, you can still create an alarm, but the stop or terminate actions won't be performed. However, if you are later granted the required permissions, the alarm actions that you created earlier will be performed.
If you are using an IAM role (for example, an Amazon EC2 instance profile), you cannot stop or terminate the instance using alarm actions. However, you can still see the alarm state and perform any other actions such as Amazon SNS notifications or Auto Scaling policies.
If you are using temporary security credentials granted using the AWS Security Token Service (AWS STS), you cannot stop or terminate an Amazon EC2 instance using alarm actions.
Note that you must create at least one stop, terminate, or reboot alarm using the Amazon EC2 or CloudWatch console to create the EC2ActionsAccess IAM role. After this IAM role is created, you can create stop, terminate, or reboot alarms using a command-line interface or an API.
See also: AWS API Documentation
Request Syntax
client.put_metric_alarm(
AlarmName='string',
AlarmDescription='string',
ActionsEnabled=True|False,
OKActions=[
'string',
],
AlarmActions=[
'string',
],
InsufficientDataActions=[
'string',
],
MetricName='string',
Namespace='string',
Statistic='SampleCount'|'Average'|'Sum'|'Minimum'|'Maximum',
ExtendedStatistic='string',
Dimensions=[
{
'Name': 'string',
'Value': 'string'
},
],
Period=123,
Unit='Seconds'|'Microseconds'|'Milliseconds'|'Bytes'|'Kilobytes'|'Megabytes'|'Gigabytes'|'Terabytes'|'Bits'|'Kilobits'|'Megabits'|'Gigabits'|'Terabits'|'Percent'|'Count'|'Bytes/Second'|'Kilobytes/Second'|'Megabytes/Second'|'Gigabytes/Second'|'Terabytes/Second'|'Bits/Second'|'Kilobits/Second'|'Megabits/Second'|'Gigabits/Second'|'Terabits/Second'|'Count/Second'|'None',
EvaluationPeriods=123,
Threshold=123.0,
ComparisonOperator='GreaterThanOrEqualToThreshold'|'GreaterThanThreshold'|'LessThanThreshold'|'LessThanOrEqualToThreshold',
TreatMissingData='string',
EvaluateLowSampleCountPercentile='string'
)
string
[REQUIRED]
The name for the alarm. This name must be unique within the AWS account.
string
The description for the alarm.
boolean
Indicates whether actions should be executed during any changes to the alarm state.
list
The actions to execute when this alarm transitions to an OK state from any other state. Each action is specified as an Amazon Resource Name (ARN).
Valid Values: arn:aws:automate:region :ec2:stop | arn:aws:automate:region :ec2:terminate | arn:aws:automate:region :ec2:recover
Valid Values (for use with IAM roles): arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Stop/1.0 | arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Terminate/1.0 | arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Reboot/1.0
(string) --
list
The actions to execute when this alarm transitions to the ALARM state from any other state. Each action is specified as an Amazon Resource Name (ARN).
Valid Values: arn:aws:automate:region :ec2:stop | arn:aws:automate:region :ec2:terminate | arn:aws:automate:region :ec2:recover
Valid Values (for use with IAM roles): arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Stop/1.0 | arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Terminate/1.0 | arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Reboot/1.0
(string) --
list
The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state from any other state. Each action is specified as an Amazon Resource Name (ARN).
Valid Values: arn:aws:automate:region :ec2:stop | arn:aws:automate:region :ec2:terminate | arn:aws:automate:region :ec2:recover
Valid Values (for use with IAM roles): arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Stop/1.0 | arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Terminate/1.0 | arn:aws:swf:us-east-1:{customer-account }:action/actions/AWS_EC2.InstanceId.Reboot/1.0
(string) --
string
[REQUIRED]
The name for the metric associated with the alarm.
string
[REQUIRED]
The namespace for the metric associated with the alarm.
string
The statistic for the metric associated with the alarm, other than percentile. For percentile statistics, use ExtendedStatistic .
string
The percentile statistic for the metric associated with the alarm. Specify a value between p0.0 and p100.
list
The dimensions for the metric associated with the alarm.
(dict) --
Expands the identity of a metric.
Name (string) -- [REQUIRED]
The name of the dimension.
Value (string) -- [REQUIRED]
The value representing the dimension measurement.
integer
[REQUIRED]
The period, in seconds, over which the specified statistic is applied.
string
The unit of measure for the statistic. For example, the units for the Amazon EC2 NetworkIn metric are Bytes because NetworkIn tracks the number of bytes that an instance receives on all network interfaces. You can also specify a unit when you create a custom metric. Units help provide conceptual meaning to your data. Metric data points that specify a unit of measure, such as Percent, are aggregated separately.
If you specify a unit, you must use a unit that is appropriate for the metric. Otherwise, the Amazon CloudWatch alarm can get stuck in the INSUFFICIENT DATA state.
integer
[REQUIRED]
The number of periods over which data is compared to the specified threshold.
float
[REQUIRED]
The value against which the specified statistic is compared.
string
[REQUIRED]
The arithmetic operation to use when comparing the specified statistic and threshold. The specified statistic value is used as the first operand.
string
Sets how this alarm is to handle missing data points. If TreatMissingData is omitted, the default behavior of missing is used. For more information, see Configuring How CloudWatch Alarms Treats Missing Data.
Valid Values: breaching | notBreaching | ignore | missing
string
Used only for alarms based on percentiles. If you specify ignore , the alarm state will not change during periods with too few data points to be statistically significant. If you specify evaluate or omit this parameter, the alarm will always be evaluated and possibly change state no matter how many data points are available. For more information, see Percentile-Based CloudWatch Alarms and Low Data Samples.
Valid Values: evaluate | ignore
None