[telegraf] Subtable were not correctly formed in the manifests

[shin71]

Telegraf CloudWatch Input Plugin Configuration Resolution in Helm Template

Configuration

configuration:
  config:
    agent:
      interval: "10s"
      # ... other settings ...
    inputs:
      - cloudwatch:
          region: "eu-west-1"
          role_arn: $AWS_ROLE_ARN
          web_identity_token_file: $AWS_WEB_IDENTITY_TOKEN_FILE
          period: "5m"
          delay: "1m"
          namespaces:
            - "AWS/EC2"
          metrics:
            names:
              - "CPUUtilization"
              - "DiskReadOps"
              - "NetworkIn"

Initial Error

2024-11-28T11:17:01Z I! Loading config: /etc/telegraf/telegraf.conf
2024-11-28T11:17:01Z E! loading config file /etc/telegraf/telegraf.conf failed: error parsing cloudwatch, line 41: cannot unmarshal TOML table into ]*cloudwatch.cloudwatchMetric (need struct or map)
Stream closed EOF for telegraf/telegraf-7c58fdcfc8-gxx8n (telegraf)

Problematic Helm Template

[[inputs.cloudwatch]]
  delay = "1m"
  namespaces = [
    "AWS/EC2"
  ]
  period = "5m"
  region = "eu-west-1"
  role_arn = "$AWS_ROLE_ARN"
  web_identity_token_file = "$AWS_WEB_IDENTITY_TOKEN_FILE"
  [inputs.cloudwatch.metrics]
    names = [
        "CPUUtilization",
        "DiskReadOps",
        "NetworkIn"
    ]

Corrected Helm Template

[[inputs.cloudwatch]]
  delay = "1m"
  namespaces = [
    "AWS/EC2"
  ]
  period = "5m"
  region = "eu-west-1"
  role_arn = "$AWS_ROLE_ARN"
  web_identity_token_file = "$AWS_WEB_IDENTITY_TOKEN_FILE"
  [[inputs.cloudwatch.metrics]]
    names = [
        "CPUUtilization",
        "DiskReadOps",
        "NetworkIn"
    ]

Changes

• This fixes the TOML parsing issue with the CloudWatch input plugin when generated by Helm

Reference

• Telegraf CloudWatch Input Plugin