The configuration validator checks the commented lines.

[robinpecha]

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Problem

Debian 12 Vector 40
It will fail to run if it contains a non-existent env variable in the comment.
Works fine with this config:

      index: "zzz"
      # index: "zzz_$$$$"
      # index: "zzz_{{{"
      # index: "zzz_${{{"
      # index: "zzz_${HOSTNAME}"

But not with this one:

      index: "zzz"
      # index: "zzz_${somenonexistingvariable}"
      # index: "zzz_$$$$"
      # index: "zzz_{{{"
      # index: "zzz_${{{"
      # index: "zzz_${HOSTNAME}"

Configuration

sources:
  syslog_varlog_messages:
    type: file
    include:
      - "/var/log/dpkg.log"
      

sinks:
  es_journal:
    type: elasticsearch
    inputs: ["*"]
    mode: bulk
    bulk:
      index: "zzz"
      # index: "zzz_$$$$"
      # index: "zzz_{{{"
      # index: "zzz_${{{"
      # index: "zzz_${HOSTNAME}"
      # index: "zzz_${somenonexistingvariable}"
    api_version: auto
    id_key: id
    doc_type: _doc
    compression: zlib
    endpoints: ["https://

Version

vector 0.40.0

Debug Output

2024-08-08T08:04:14.427061Z DEBUG vector::app: Internal log rate limit configured. internal_log_rate_secs=10
2024-08-08T08:04:14.429812Z  INFO vector::app: Log level is enabled. level="trace"
2024-08-08T08:04:14.431372Z DEBUG vector::app: messaged="Building runtime." worker_threads=1
2024-08-08T08:04:14.433733Z  INFO vector::app: Loading configs. paths=["/etc/vector/vector.yaml"]
2024-08-08T08:04:14.436049Z ERROR vector::cli: Configuration error. error=Missing environment variable in config. name = "somenonexistingvariable"

Example Data

No response

Additional Context

No response

References

No response

[jszwedko]

Thanks for this report @robinpecha ! I think it is the same as #797 so I'll close this one but thanks for the additional detail!