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https://github.com/vale981/ray
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241c955707
* Determine node ip address programatically. * Factor out methods for getting node IP addresses. * Address comments.
77 lines
3.9 KiB
Python
77 lines
3.9 KiB
Python
from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import argparse
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import redis
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import ray.services as services
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parser = argparse.ArgumentParser(description="Parse addresses for the worker to connect to.")
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parser.add_argument("--node-ip-address", required=False, type=str, help="the IP address of the worker's node")
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parser.add_argument("--redis-address", required=False, type=str, help="the address to use for Redis")
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parser.add_argument("--num-workers", default=10, required=False, type=int, help="the number of workers to start on this node")
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parser.add_argument("--head", action="store_true", help="provide this argument for the head node")
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def check_no_existing_redis_clients(node_ip_address, redis_address):
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redis_host, redis_port = redis_address.split(":")
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redis_client = redis.StrictRedis(host=redis_host, port=int(redis_port))
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# The client table prefix must be kept in sync with the file
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# "src/common/redis_module/ray_redis_module.c" where it is defined.
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REDIS_CLIENT_TABLE_PREFIX = "CL:"
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client_keys = redis_client.keys("{}*".format(REDIS_CLIENT_TABLE_PREFIX))
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# Filter to clients on the same node and do some basic checking.
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for key in client_keys:
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info = redis_client.hgetall(key)
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assert b"ray_client_id" in info
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assert b"node_ip_address" in info
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assert b"client_type" in info
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if info[b"node_ip_address"].decode("ascii") == node_ip_address:
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raise Exception("This Redis instance is already connected to clients with this IP address.")
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if __name__ == "__main__":
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args = parser.parse_args()
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# Note that we redirect stdout and stderr to /dev/null because otherwise
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# attempts to print may cause exceptions if a process is started inside of an
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# SSH connection and the SSH connection dies. TODO(rkn): This is a temporary
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# fix. We should actually redirect stdout and stderr to Redis in some way.
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if args.head:
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# Start Ray on the head node.
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if args.redis_address is not None:
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raise Exception("If --head is passed in, a Redis server will be started, so a Redis address should not be provided.")
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# Get the node IP address if one is not provided.
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if args.node_ip_address is None:
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node_ip_address = services.get_node_ip_address()
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else:
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node_ip_address = args.node_ip_address
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print("Using IP address {} for this node.".format(node_ip_address))
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address_info = services.start_ray_local(node_ip_address=node_ip_address,
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num_workers=args.num_workers,
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cleanup=False,
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redirect_output=True)
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else:
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# Start Ray on a non-head node.
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if args.redis_address is None:
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raise Exception("If --head is not passed in, --redis-address must be provided.")
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redis_host, redis_port = args.redis_address.split(":")
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# Wait for the Redis server to be started. And throw an exception if we
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# can't connect to it.
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services.wait_for_redis_to_start(redis_host, int(redis_port))
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# Get the node IP address if one is not provided.
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if args.node_ip_address is None:
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node_ip_address = services.get_node_ip_address(args.redis_address)
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else:
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node_ip_addess = args.node_ip_address
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print("Using IP address {} for this node.".format(node_ip_address))
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# Check that there aren't already Redis clients with the same IP address
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# connected with this Redis instance. This raises an exception if the Redis
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# server already has clients on this node.
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check_no_existing_redis_clients(node_ip_address, args.redis_address)
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address_info = services.start_ray_node(node_ip_address=node_ip_address,
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redis_address=args.redis_address,
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num_workers=args.num_workers,
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cleanup=False,
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redirect_output=True)
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print(address_info)
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