<commit_before>from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

try:  # py3
    from shlex import quote
except ImportError:  # py2
    from pipes import quote
import logging
import os
import subprocess
import sys
import time

from threading import Thread
from getpass import getuser

from ray.autoscaler.tags import TAG_RAY_NODE_STATUS, TAG_RAY_RUNTIME_CONFIG
from ray.autoscaler.log_timer import LogTimer

logger = logging.getLogger(__name__)

# How long to wait for a node to start, in seconds
NODE_START_WAIT_S = 300
SSH_CHECK_INTERVAL = 5
CONTROL_PATH_MAX_LENGTH = 70


def get_default_ssh_options(private_key, connect_timeout, ssh_control_path):
    OPTS = [
        ("ConnectTimeout", "{}s".format(connect_timeout)),
        ("StrictHostKeyChecking", "no"),
        ("ControlMaster", "auto"),
        ("ControlPath", "{}/%C".format(ssh_control_path)),
        ("ControlPersist", "10s"),
    ]

    return ["-i", private_key] + [
        x for y in (["-o", "{}={}".format(k, v)] for k, v in OPTS) for x in y
    ]


class NodeUpdater(object):
    """A process for syncing files and running init commands on a node."""

    def __init__(self,
                 node_id,
                 provider_config,
                 provider,
                 auth_config,
                 cluster_name,
                 file_mounts,
                 initialization_commands,
                 setup_commands,
                 runtime_hash,
                 process_runner=subprocess,
                 exit_on_update_fail=False,
                 use_internal_ip=False):

        ssh_control_path = "/tmp/{}_ray_ssh_sockets/{}".format(
            getuser(), cluster_name)[:CONTROL_PATH_MAX_LENGTH]

        self.daemon = True
        self.process_runner = process_runner
        self.node_id = node_id
        self.use_internal_ip = (use_internal_ip or provider_config.get(
            "use_internal_ips", False))
        self.provider = provider
        self.ssh_private_key = auth_config["ssh_private_key"]
        self.ssh_user = auth_config["ssh_user"]
        self.ssh_control_path = ssh_control_path
        self.ssh_ip = None<commit_msg>[autoscaler] Fix ssh control path length issue (#5476)<commit_after>from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

try:  # py3
    from shlex import quote
except ImportError:  # py2
    from pipes import quote
import hashlib
import logging
import os
import subprocess
import sys
import time

from threading import Thread
from getpass import getuser

from ray.autoscaler.tags import TAG_RAY_NODE_STATUS, TAG_RAY_RUNTIME_CONFIG
from ray.autoscaler.log_timer import LogTimer

logger = logging.getLogger(__name__)

# How long to wait for a node to start, in seconds
NODE_START_WAIT_S = 300
SSH_CHECK_INTERVAL = 5
HASH_MAX_LENGTH = 10


def get_default_ssh_options(private_key, connect_timeout, ssh_control_path):
    OPTS = [
        ("ConnectTimeout", "{}s".format(connect_timeout)),
        ("StrictHostKeyChecking", "no"),
        ("ControlMaster", "auto"),
        ("ControlPath", "{}/%C".format(ssh_control_path)),
        ("ControlPersist", "10s"),
    ]

    return ["-i", private_key] + [
        x for y in (["-o", "{}={}".format(k, v)] for k, v in OPTS) for x in y
    ]


class NodeUpdater(object):
    """A process for syncing files and running init commands on a node."""

    def __init__(self,
                 node_id,
                 provider_config,
                 provider,
                 auth_config,
                 cluster_name,
                 file_mounts,
                 initialization_commands,
                 setup_commands,
                 runtime_hash,
                 process_runner=subprocess,
                 exit_on_update_fail=False,
                 use_internal_ip=False):

        ssh_control_hash = hashlib.md5(cluster_name.encode()).hexdigest()
        ssh_user_hash = hashlib.md5(getuser().encode()).hexdigest()
        ssh_control_path = "/tmp/ray_ssh_{}/{}".format(
            ssh_user_hash[:HASH_MAX_LENGTH],
            ssh_control_hash[:HASH_MAX_LENGTH])

        self.daemon = True
        self.process_runner = process_runner
        self.node_id = node_id
        self.use_internal_ip = (use_internal_ip or provider_config.get(
            "use_internal_ips", False))
        self.provider = provider
        self.ssh_private_key = auth_config["ssh_private_key"]
        self.ssh_user = auth_config["ssh_user"]
        self.ssh_control_path = ssh_control_path
        self.ssh_ip = None
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