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Updated at July 17, 2026   02:08 PM

Development mode

Тarantool Cluster Manager provides a special mode aimed to use during the development. This mode extends the web interface with capabilities that can help in development or testing environments, such as starting and stopping instances or instance promotion.

Enabling development mode

You can enable TCM development mode in different ways: in its web interface, in the configuration file, using an environment variable, or using a command-line option.

Web interface

To enable development mode on the running TCM instance, use its web interface:

  1. Open user settings: click Settings under the user name in the header.
  2. Go to the About tab.
  3. Click the toggle button beside tcm/mode.

Configuration file

To start TCM in the development mode, specify the mode: development option in its configuration file:

# tcm_config.yamlmode: development

Command-line option

To start TCM in the development mode, specify the --mode=development command-line option:

$ tcm --mode=development

Environment variable

To make new TCM instances start in the development mode by default, set the TCM_MODE environment variable to development:

$ export TCM_MODE=development$ tcm