Environment Variables

module `env_vars`

Environment variable configuration for SkyRL.

All environment variables used by SkyRL should be defined here for discoverability.

Attributes:

Name	Type	Description
`SKYRL_RAY_PG_TIMEOUT_IN_S`		Timeout for allocating the placement group for different actors in SkyRL.
`SKYRL_WORKER_NCCL_TIMEOUT_IN_S`		Timeout for initializing the NCCL process group for the worker, defaults to 10 minutes.
`SKYRL_VLLM_DP_PORT_OFFSET`		Offset for the data parallel port of the vLLM server.
`SKYRL_WAIT_UNTIL_INFERENCE_SERVER_HEALTHY_TIMEOUT_S`		Timeout for waiting until the inference server is healthy.
`SKYRL_LD_LIBRARY_PATH_EXPORT`		Whether to export `LD_LIBRARY_PATH` environment variable from the driver to the workers with Ray's runtime env.
`SKYRL_PYTHONPATH_EXPORT`		Whether to export `PYTHONPATH` environment variable from the driver to the workers with Ray's runtime env.
`SKYRL_DUMP_INFRA_LOG_TO_STDOUT`		When enabled, infrastructure logs (vLLM, Ray, workers) are shown on stdout

attr `SKYRL_RAY_PG_TIMEOUT_IN_S`

SKYRL_RAY_PG_TIMEOUT_IN_S = int(os.environ.get('SKYRL_RAY_PG_TIMEOUT_IN_S', 180))

Timeout for allocating the placement group for different actors in SkyRL.

attr `SKYRL_WORKER_NCCL_TIMEOUT_IN_S`

SKYRL_WORKER_NCCL_TIMEOUT_IN_S = int(os.environ.get('SKYRL_WORKER_NCCL_TIMEOUT_IN_S', 600))

Timeout for initializing the NCCL process group for the worker, defaults to 10 minutes.

attr `SKYRL_VLLM_DP_PORT_OFFSET`

SKYRL_VLLM_DP_PORT_OFFSET = int(os.environ.get('SKYRL_VLLM_DP_PORT_OFFSET', 500))

Offset for the data parallel port of the vLLM server.

attr `SKYRL_WAIT_UNTIL_INFERENCE_SERVER_HEALTHY_TIMEOUT_S`

SKYRL_WAIT_UNTIL_INFERENCE_SERVER_HEALTHY_TIMEOUT_S = int(os.environ.get('SKYRL_WAIT_UNTIL_INFERENCE_SERVER_HEALTHY_TIMEOUT_S', 600))

Timeout for waiting until the inference server is healthy.

attr `SKYRL_LD_LIBRARY_PATH_EXPORT`

SKYRL_LD_LIBRARY_PATH_EXPORT = str(os.environ.get('SKYRL_LD_LIBRARY_PATH_EXPORT', 'False')).lower() in ('true', '1', 'yes')

Whether to export LD_LIBRARY_PATH environment variable from the driver to the workers with Ray's runtime env.

For example, if you are using RDMA, you may need to customize the LD_LIBRARY_PATH to include the RDMA libraries (Ex: EFA on AWS).

attr `SKYRL_PYTHONPATH_EXPORT`

SKYRL_PYTHONPATH_EXPORT = str(os.environ.get('SKYRL_PYTHONPATH_EXPORT', 'False')).lower() in ('true', '1', 'yes')

Whether to export PYTHONPATH environment variable from the driver to the workers with Ray's runtime env.

See https://github.com/ray-project/ray/issues/56697 for details on why this is needed.

attr `SKYRL_DUMP_INFRA_LOG_TO_STDOUT`

SKYRL_DUMP_INFRA_LOG_TO_STDOUT = str(os.environ.get('SKYRL_DUMP_INFRA_LOG_TO_STDOUT', 'False')).lower() in ('true', '1', 'yes')

When enabled, infrastructure logs (vLLM, Ray, workers) are shown on stdout instead of being redirected to the log file. Useful for debugging startup issues.

Default: False (infrastructure logs go to file only, stdout shows training progress). Set SKYRL_DUMP_INFRA_LOG_TO_STDOUT=1 to show all logs on stdout.

Environment Variables

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