# flytekit.core.constants

## Directory

### Variables

| Property | Type | Description |
|-|-|-|
| `CACHE_KEY_METADATA` | `str` |  |
| `CONTAINER_ARRAY_TASK` | `str` |  |
| `DEFAULT_FAILURE_NODE_ID` | `str` |  |
| `EAGER_ROOT_ENV_NAME` | `str` |  |
| `EAGER_TAG_KEY` | `str` |  |
| `EAGER_TAG_ROOT_KEY` | `str` |  |
| `END_NODE_ID` | `str` |  |
| `ERROR_FILE_NAME` | `str` |  |
| `FLYTE_FAIL_ON_ERROR` | `str` |  |
| `FLYTE_INTERNAL_IMAGE_ENV_VAR` | `str` |  |
| `FLYTE_USE_OLD_DC_FORMAT` | `str` |  |
| `FUTURES_FILE_NAME` | `str` |  |
| `GLOBAL_INPUT_NODE_ID` | `str` |  |
| `INPUT_FILE_NAME` | `str` |  |
| `MESSAGEPACK` | `str` |  |
| `OUTPUT_FILE_NAME` | `str` |  |
| `REQUIREMENTS_FILE_NAME` | `str` |  |
| `RUNTIME_PACKAGES_ENV_NAME` | `str` |  |
| `SERIALIZATION_FORMAT` | `str` |  |
| `SHARED_MEMORY_MOUNT_NAME` | `str` |  |
| `SHARED_MEMORY_MOUNT_PATH` | `str` |  |
| `SOURCE_CODE` | `str` |  |
| `START_NODE_ID` | `str` |  |

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**Source**: https://github.com/unionai/unionai-docs/blob/main/content/api-reference/flytekit-sdk/packages/flytekit.core.constants.md
**HTML**: https://www.union.ai/docs/v1/union/api-reference/flytekit-sdk/packages/flytekit.core.constants/