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Log Formatting

The LOG_FORMAT config specifies how dbt's logs should be formatted. If the value of this config is json, dbt will output fully structured logs in JSON format; otherwise, it will output text-formatted logs that are sparser for the CLI and more detailed in logs/dbt.log.

dbt --log-format json run
{"code": "A001", "data": {"v": "=1.0.0"}, "invocation_id": "1193e449-4b7a-4eb1-8e8e-047a8b3b7973", "level": "info", "log_version": 1, "msg": "Running with dbt=1.0.0", "node_info": {}, "pid": 35098, "thread_name": "MainThread", "ts": "2021-12-03T10:46:59.928217Z", "type": "log_line"}
Tip: verbose structured logs

Use json formatting value in conjunction with the DEBUG config to produce rich log information which can be piped into monitoring tools for analysis:

dbt --debug --log-format json run

See structured logging for more details.

Debug-level logging

The DEBUG config redirects dbt's debug logs to standard output. This has the effect of showing debug-level log information in the terminal in addition to the logs/dbt.log file. This output is verbose.

The --debug flag is also available via shorthand as -d.

dbt --debug run

Log and target paths

By default, dbt will write logs to a directory named logs/, and all other artifacts to a directory named target/. Both of those directories are located relative to dbt_project.yml of the active project.

Just like other global configs, it is possible to override these values for your environment or invocation by using CLI options (--target-path, --log-path) or environment variables (DBT_TARGET_PATH, DBT_LOG_PATH).

Suppress non-error logs in output

By default, dbt shows all logs in standard out (stdout). You can use the QUIET config to show only error logs in stdout. Logs will still include the output of anything passed to the print() macro. For example, you might suppress all but error logs to more easily find and debug a jinja error.

quiet: true

Supply the -q or --quiet flag to dbt run to show only error logs and suppress non-error logs.

dbt --quiet run

dbt list logging

In dbt version 1.5, we updated the logging behavior of the dbt list command to include INFO level logs by default.

You can use either of these parameters to ensure clean output that's compatible with downstream processes, such as piping results to jq, a file, or another process:

  • dbt --log-level warn list (recommended; equivalent to previous default)
  • dbt --quiet list (suppresses all logging less than ERROR level, except for "printed" messages and list output)

Logging relational cache events

The LOG_CACHE_EVENTS config allows detailed logging for relational cache events, which are disabled by default.

dbt --log-cache-events compile