132 lines
5.9 KiB
Markdown
132 lines
5.9 KiB
Markdown
# Amazon CloudWatch Statistics Input
|
|
|
|
This plugin will pull Metric Statistics from Amazon CloudWatch.
|
|
|
|
### Amazon Authentication
|
|
|
|
This plugin uses a credential chain for Authentication with the CloudWatch
|
|
API endpoint. In the following order the plugin will attempt to authenticate.
|
|
1. Assumed credentials via STS if `role_arn` attribute is specified (source credentials are evaluated from subsequent rules)
|
|
2. Explicit credentials from `access_key`, `secret_key`, and `token` attributes
|
|
3. Shared profile from `profile` attribute
|
|
4. [Environment Variables](https://github.com/aws/aws-sdk-go/wiki/configuring-sdk#environment-variables)
|
|
5. [Shared Credentials](https://github.com/aws/aws-sdk-go/wiki/configuring-sdk#shared-credentials-file)
|
|
6. [EC2 Instance Profile](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html)
|
|
|
|
### Configuration:
|
|
|
|
```toml
|
|
[[inputs.cloudwatch]]
|
|
## Amazon Region (required)
|
|
region = 'us-east-1'
|
|
|
|
## Requested CloudWatch aggregation Period (required - must be a multiple of 60s)
|
|
period = '1m'
|
|
|
|
## Collection Delay (required - must account for metrics availability via CloudWatch API)
|
|
delay = '1m'
|
|
|
|
## Override global run interval (optional - defaults to global interval)
|
|
## Recomended: use metric 'interval' that is a multiple of 'period' to avoid
|
|
## gaps or overlap in pulled data
|
|
interval = '1m'
|
|
|
|
## Metric Statistic Namespace (required)
|
|
namespace = 'AWS/ELB'
|
|
|
|
## Maximum requests per second. Note that the global default AWS rate limit is
|
|
## 10 reqs/sec, so if you define multiple namespaces, these should add up to a
|
|
## maximum of 10.
|
|
ratelimit = 10
|
|
|
|
## Metrics to Pull (optional)
|
|
## Defaults to all Metrics in Namespace if nothing is provided
|
|
## Refreshes Namespace available metrics every 1h
|
|
[[inputs.cloudwatch.metrics]]
|
|
names = ['Latency', 'RequestCount']
|
|
|
|
## Dimension filters for Metric (optional)
|
|
[[inputs.cloudwatch.metrics.dimensions]]
|
|
name = 'LoadBalancerName'
|
|
value = 'p-example'
|
|
|
|
[[inputs.cloudwatch.metrics.dimensions]]
|
|
name = 'AvailabilityZone'
|
|
value = '*'
|
|
```
|
|
#### Requirements and Terminology
|
|
|
|
Plugin Configuration utilizes [CloudWatch concepts](http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_concepts.html) and access pattern to allow monitoring of any CloudWatch Metric.
|
|
|
|
- `region` must be a valid AWS [Region](http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_concepts.html#CloudWatchRegions) value
|
|
- `period` must be a valid CloudWatch [Period](http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_concepts.html#CloudWatchPeriods) value
|
|
- `namespace` must be a valid CloudWatch [Namespace](http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_concepts.html#Namespace) value
|
|
- `names` must be valid CloudWatch [Metric](http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_concepts.html#Metric) names
|
|
- `dimensions` must be valid CloudWatch [Dimension](http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/cloudwatch_concepts.html#Dimension) name/value pairs
|
|
|
|
Omitting or specifying a value of `'*'` for a dimension value configures all available metrics that contain a dimension with the specified name
|
|
to be retrieved. If specifying >1 dimension, then the metric must contain *all* the configured dimensions where the the value of the
|
|
wildcard dimension is ignored.
|
|
|
|
Example:
|
|
```
|
|
[[inputs.cloudwatch.metrics]]
|
|
names = ['Latency']
|
|
|
|
## Dimension filters for Metric (optional)
|
|
[[inputs.cloudwatch.metrics.dimensions]]
|
|
name = 'LoadBalancerName'
|
|
value = 'p-example'
|
|
|
|
[[inputs.cloudwatch.metrics.dimensions]]
|
|
name = 'AvailabilityZone'
|
|
value = '*'
|
|
```
|
|
|
|
If the following ELBs are available:
|
|
- name: `p-example`, availabilityZone: `us-east-1a`
|
|
- name: `p-example`, availabilityZone: `us-east-1b`
|
|
- name: `q-example`, availabilityZone: `us-east-1a`
|
|
- name: `q-example`, availabilityZone: `us-east-1b`
|
|
|
|
|
|
Then 2 metrics will be output:
|
|
- name: `p-example`, availabilityZone: `us-east-1a`
|
|
- name: `p-example`, availabilityZone: `us-east-1b`
|
|
|
|
If the `AvailabilityZone` wildcard dimension was omitted, then a single metric (name: `p-example`)
|
|
would be exported containing the aggregate values of the ELB across availability zones.
|
|
|
|
#### Restrictions and Limitations
|
|
- CloudWatch metrics are not available instantly via the CloudWatch API. You should adjust your collection `delay` to account for this lag in metrics availability based on your [monitoring subscription level](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-cloudwatch-new.html)
|
|
- CloudWatch API usage incurs cost - see [GetMetricStatistics Pricing](https://aws.amazon.com/cloudwatch/pricing/)
|
|
|
|
### Measurements & Fields:
|
|
|
|
Each CloudWatch Namespace monitored records a measurement with fields for each available Metric Statistic
|
|
Namespace and Metrics are represented in [snake case](https://en.wikipedia.org/wiki/Snake_case)
|
|
|
|
- cloudwatch_{namespace}
|
|
- {metric}_sum (metric Sum value)
|
|
- {metric}_average (metric Average value)
|
|
- {metric}_minimum (metric Minimum value)
|
|
- {metric}_maximum (metric Maximum value)
|
|
- {metric}_sample_count (metric SampleCount value)
|
|
|
|
|
|
### Tags:
|
|
Each measurement is tagged with the following identifiers to uniquely identify the associated metric
|
|
Tag Dimension names are represented in [snake case](https://en.wikipedia.org/wiki/Snake_case)
|
|
|
|
- All measurements have the following tags:
|
|
- region (CloudWatch Region)
|
|
- unit (CloudWatch Metric Unit)
|
|
- {dimension-name} (Cloudwatch Dimension value - one for each metric dimension)
|
|
|
|
### Example Output:
|
|
|
|
```
|
|
$ ./telegraf -config telegraf.conf -input-filter cloudwatch -test
|
|
> cloudwatch_aws_elb,load_balancer_name=p-example,region=us-east-1,unit=seconds latency_average=0.004810798017284538,latency_maximum=0.1100282669067383,latency_minimum=0.0006084442138671875,latency_sample_count=4029,latency_sum=19.382705211639404 1459542420000000000
|
|
```
|