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AWS cloudwatch to prometheus exporter - Discovers services through AWS tags, gets cloudwatch data and provides them as prometheus metrics with AWS tags as labels.

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YACE - yet another cloudwatch exporter Docker Image

Project Status

YACE is currently in quick iteration mode. Things will probably break in upcoming versions. However, it has been in production use at InVision AG for a couple of months already.

Features

  • Stop worrying about your AWS IDs - Auto discovery of resources via tags
  • Filter monitored resources via regex
  • Automatic adding of tag labels to metrics
  • Allows to export 0 even if CloudWatch returns nil
  • Exports metrics with CloudWatch timestamps (can be disabled per-metric)
  • Static metrics support for all cloudwatch metrics without auto discovery
  • Pull data from mulitple AWS accounts using cross-acount roles
  • Supported services with auto discovery through tags:
    • alb - Application Load Balancer
    • ebs - Elastic Block Storage
    • ec - ElastiCache
    • ec2 - Elastic Compute Cloud
    • efs - Elastic File System
    • elb - Elastic Load Balancer
    • es - ElasticSearch
    • lambda - Lambda Functions
    • rds - Relational Database Service
    • s3 - Object Storage
    • vpn - VPN connection
    • kinesis - Kinesis Data Stream

Image

  • quay.io/invisionag/yet-another-cloudwatch-exporter:x.x.x e.g. 0.5.0
  • See Releases for binaries

Configuration

Top level configuration

Key Description
discovery Auto-discovery configuration
static List of static configurations

Auto-discovery configuration

Key Description
exportedTagsOnMetrics List of tags per service to export to all metrics
jobs List of auto-discovery jobs

exportedTagsOnMetrics example:

exportedTagsOnMetrics:
  ec2:
    - Name
    - type

Auto-discovery job

Key Description
region AWS region
type Service name, e.g. "ec2", "s3", etc.
roleArn IAM role to assume (optional)
searchTags List of Key/Value pairs to use for tag filtering (all must match), Value can be a regex.
metrics List of metric definitions

searchTags example:

searchTags:
  - Key: env
    Value: production

Metric definition

Key Description
name CloudWatch metric name
statistics List of statictic types, e.g. "Mininum", "Maximum", etc.
period Statictic period
length How far back to request data for
delay If set it will request metrics up until current_time - delay
nilToZero Return 0 value if Cloudwatch returns no metrics at all
disableTimestamp Do not export the metric with the original CloudWatch timestamp (useful for sparse metrics, e.g from S3)

Static configuration

Key Description
region AWS region
roleArn IAM role to assume
namespace CloudWatch namespace
customTags Custom tags to be added as a list of Key/Value pairs
dimensions CloudWatch metric dimensions as a list of Name/Value pairs
metrics List of metric definitions

Example of config File

discovery:
  exportedTagsOnMetrics:
    ec2:
      - Name
  jobs:
  - region: eu-west-1
    type: "es"
    searchTags:
      - Key: type
        Value: ^(easteregg|k8s)$
    metrics:
      - name: FreeStorageSpace
        statistics:
        - 'Sum'
        period: 600
        length: 60
      - name: ClusterStatus.green
        statistics:
        - 'Minimum'
        period: 600
        length: 60
      - name: ClusterStatus.yellow
        statistics:
        - 'Maximum'
        period: 600
        length: 60
      - name: ClusterStatus.red
        statistics:
        - 'Maximum'
        period: 600
        length: 60
  - type: "elb"
    region: eu-west-1
    searchTags:
      - Key: KubernetesCluster
        Value: production-19
    metrics:
      - name: HealthyHostCount
        statistics:
        - 'Minimum'
        period: 60
        length: 300
      - name: HTTPCode_Backend_4XX
        statistics:
        - 'Sum'
        period: 60
        length: 900
        delay: 300
        nilToZero: true
  - type: "alb"
    region: eu-west-1
    searchTags:
      - Key: kubernetes.io/service-name
        Value: .*
    metrics:
      - name: UnHealthyHostCount
        statistics: [Maximum]
        period: 60
        length: 600
  - type: "vpn"
    region: eu-west-1
    searchTags:
      - Key: kubernetes.io/service-name
        Value: .*
    metrics:
      - name: TunnelState
        statistics:
        - 'p90'
        period: 60
        length: 300
  - type: "kinesis"
    region: eu-west-1
    metrics:
      - name: PutRecords.Success
        statistics:
        - 'Sum'
        period: 60
        length: 300
  - type: "s3"
    region: eu-west-1
    searchTags:
      - Key: type
        Value: public
    metrics:
      - name: NumberOfObjects
        statistics:
          - Average
        period: 86400
        length: 172800
        disableTimestamp: true
static:
  - namespace: AWS/AutoScaling
    region: eu-west-1
    dimensions:
     - name: AutoScalingGroupName
       value: Test
    customTags:
      - Key: CustomTag
        Value: CustomValue
    metrics:
      - name: GroupInServiceInstances
        statistics:
        - 'Minimum'
        period: 60
        length: 300

Metrics Examples

### Metrics with exportedTagsOnMetrics
aws_ec2_cpuutilization_maximum{name="arn:aws:ec2:eu-west-1:472724724:instance/i-someid", tag_Name="jenkins"} 57.2916666666667

### Info helper with tags
aws_elb_info{name="arn:aws:elasticloadbalancing:eu-west-1:472724724:loadbalancer/a815b16g3417211e7738a02fcc13bbf9",tag_KubernetesCluster="production-19",tag_Name="",tag_kubernetes_io_cluster_production_19="owned",tag_kubernetes_io_service_name="nginx-ingress/private-ext"} 0
aws_ec2_info{name="arn:aws:ec2:eu-west-1:472724724:instance/i-someid",tag_Name="jenkins"} 0

### Track cloudwatch requests to calculate costs
yace_cloudwatch_requests_total 168

Query Examples without exportedTagsOnMetrics

# CPUUtilization + Name tag of the instance id - No more instance id needed for monitoring
aws_ec2_cpuutilization_average + on (name) group_left(tag_Name) aws_ec2_info

# Free Storage in Megabytes + tag Type of the elasticsearch cluster
(aws_es_free_storage_space_sum + on (name) group_left(tag_Type) aws_es_info) / 1024

# Add kubernetes / kops tags on 4xx elb metrics
(aws_elb_httpcode_backend_4_xx_sum + on (name) group_left(tag_KubernetesCluster,tag_kubernetes_io_service_name) aws_elb_info)

# Availability Metric for ELBs (Sucessfull requests / Total Requests) + k8s service name
# Use nilToZero on all metrics else it won't work
((aws_elb_request_count_sum - on (name) group_left() aws_elb_httpcode_backend_4_xx_sum) - on (name) group_left() aws_elb_httpcode_backend_5_xx_sum) + on (name) group_left(tag_kubernetes_io_service_name) aws_elb_info

# Forecast your elasticsearch disk size in 7 days and report metrics with tags type and version
predict_linear(aws_es_free_storage_space_minimum[2d], 86400 * 7) + on (name) group_left(tag_type, tag_version) aws_es_info

# Forecast your cloudwatch costs for next 32 days based on last 10 minutes
# 1.000.000 Requests free
# 0.01 Dollar for 1.000 GetMetricStatistics Api Requests (https://aws.amazon.com/cloudwatch/pricing/)
((increase(yace_cloudwatch_requests_total[10m]) * 6 * 24 * 32) - 100000) / 1000 * 0.01

IAM

The following IAM permissions are required for YACE to work.

"tag:getResources",
"cloudwatch:GetMetricStatistics",

Kubernetes Installation

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: yace
data:
  config.yml: |-
    ---
    # Start of config file
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: yace
spec:
  replicas: 1
  template:
    metadata:
      labels:
        name: yace
    spec:
      containers:
      - name: yace
        image: quay.io/invisionag/yet-another-cloudwatch-exporter:x.x.x # release version as tag
        imagePullPolicy: IfNotPresent
        command:
          - "yace"
          - "--config.file=/tmp/config.yml"
        ports:
        - name: app
          containerPort: 5000
        volumeMounts:
        - name: config-volume
          mountPath: /tmp
      volumes:
      - name: config-volume
        configMap:
          name: yace

Contribute

Development Setup / Guide

Thank you

  • Justin Santa Barbara - For telling me about AWS tags api which simplified a lot - Thanks!
  • Brian Brazil - Who gave a lot of feedback regarding UX and prometheus lib - Thanks!

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AWS cloudwatch to prometheus exporter - Discovers services through AWS tags, gets cloudwatch data and provides them as prometheus metrics with AWS tags as labels.

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