from neco.execution.attribute import Attribute, Flags
from neco.execution.resource import ResourceManager, clsinit, ResourceState
-from neco.resources.linux.ssh_api import SSHApiFactory
+from neco.resources.linux import rpmfuncs, debfuncs
+from neco.util import sshfuncs, execfuncs
+import collections
import logging
+import os
+import random
+import re
+import tempfile
+import time
+import threading
+
+# TODO: Verify files and dirs exists already
+# TODO: Blacklist nodes!
+
+DELAY ="1s"
@clsinit
class LinuxNode(ResourceManager):
@classmethod
def _register_attributes(cls):
- hostname = Attribute("hostname", "Hostname of the machine")
+ hostname = Attribute("hostname", "Hostname of the machine",
+ flags = Flags.ExecReadOnly)
+
username = Attribute("username", "Local account username",
flags = Flags.Credential)
+
+ port = Attribute("port", "SSH port", flags = Flags.ExecReadOnly)
+
+ home = Attribute("home",
+ "Experiment home directory to store all experiment related files",
+ flags = Flags.ExecReadOnly)
+
identity = Attribute("identity", "SSH identity file",
flags = Flags.Credential)
- clean_home = Attribute("cleanHome", "Remove all files and directories
- from home folder before starting experiment",
- flags = Flags.ReadOnly)
+
+ server_key = Attribute("serverKey", "Server public key",
+ flags = Flags.ExecReadOnly)
+
+ clean_home = Attribute("cleanHome", "Remove all files and directories " + \
+ " from home folder before starting experiment",
+ flags = Flags.ExecReadOnly)
+
clean_processes = Attribute("cleanProcesses",
- "Kill all running processes before starting experiment",
- flags = Flags.ReadOnly)
- tear_down = Attribute("tearDown", "Bash script to be executed before
- releasing the resource", flags = Flags.ReadOnly)
+ "Kill all running processes before starting experiment",
+ flags = Flags.ExecReadOnly)
+
+ tear_down = Attribute("tearDown", "Bash script to be executed before " + \
+ "releasing the resource",
+ flags = Flags.ExecReadOnly)
cls._register_attribute(hostname)
cls._register_attribute(username)
+ cls._register_attribute(port)
+ cls._register_attribute(home)
cls._register_attribute(identity)
+ cls._register_attribute(server_key)
cls._register_attribute(clean_home)
cls._register_attribute(clean_processes)
cls._register_attribute(tear_down)
def __init__(self, ec, guid):
super(LinuxNode, self).__init__(ec, guid)
+ self._os = None
+
+ # lock to avoid concurrency issues on methods used by applications
+ self._lock = threading.Lock()
+
+ self._logger = logging.getLogger("LinuxNode")
+
+ def log_message(self, msg):
+ return " guid %d - host %s - %s " % (self.guid,
+ self.get("hostname"), msg)
+
+ @property
+ def home(self):
+ return self.get("home") or "/tmp"
+
+ @property
+ def exp_dir(self):
+ exp_dir = os.path.join(self.home, self.ec.exp_id)
+ return exp_dir if exp_dir.startswith('/') else "${HOME}/"
+
+ @property
+ def node_dir(self):
+ node_dir = "node-%d" % self.guid
+ return os.path.join(self.exp_dir, node_dir)
+
+ @property
+ def os(self):
+ if self._os:
+ return self._os
+
+ if (not self.get("hostname") or not self.get("username")):
+ msg = "Can't resolve OS, insufficient data "
+ self.error(msg)
+ raise RuntimeError, msg
+
+ (out, err), proc = self.execute("cat /etc/issue", with_lock = True)
- self._logger = logging.getLogger("neco.linux.Node.%d" % guid)
+ if err and proc.poll():
+ msg = "Error detecting OS "
+ self.error(msg, out, err)
+ raise RuntimeError, "%s - %s - %s" %( msg, out, err )
+
+ if out.find("Fedora release 12") == 0:
+ self._os = "f12"
+ elif out.find("Fedora release 14") == 0:
+ self._os = "f14"
+ elif out.find("Debian") == 0:
+ self._os = "debian"
+ elif out.find("Ubuntu") ==0:
+ self._os = "ubuntu"
+ else:
+ msg = "Unsupported OS"
+ self.error(msg, out)
+ raise RuntimeError, "%s - %s " %( msg, out )
+
+ return self._os
+
+ @property
+ def localhost(self):
+ return self.get("hostname") in ['localhost', '127.0.0.7', '::1']
def provision(self, filters = None):
- if not self.api.is_alive():
+ if not self.is_alive():
self._state = ResourceState.FAILED
- self.logger.error("Deploy failed. Unresponsive node")
+ self.error("Deploy failed. Unresponsive node")
return
-
+
if self.get("cleanProcesses"):
- self._clean_processes()
+ self.clean_processes()
if self.get("cleanHome"):
- # self._clean_home() -> this is dangerous
- pass
+ self.clean_home()
+
+ self.mkdir(self.node_dir)
+
+ super(LinuxNode, self).provision()
def deploy(self):
- self.provision()
+ if self.state == ResourceState.NEW:
+ try:
+ self.discover()
+ self.provision()
+ except:
+ self._state = ResourceState.FAILED
+ raise
+
+ # Node needs to wait until all associated interfaces are
+ # ready before it can finalize deployment
+ from neco.resources.linux.interface import LinuxInterface
+ ifaces = self.get_connected(LinuxInterface.rtype())
+ for iface in ifaces:
+ if iface.state < ResourceState.READY:
+ self.ec.schedule(DELAY, self.deploy)
+ return
+
super(LinuxNode, self).deploy()
def release(self):
tear_down = self.get("tearDown")
if tear_down:
- self.api.execute(tear_down)
+ self.execute(tear_down)
super(LinuxNode, self).release()
- def _validate_connection(self, guid):
+ def valid_connection(self, guid):
# TODO: Validate!
return True
- @property
- def api(self):
- host = self.get("host")
- user = self.get("user")
- identity = self.get("identity")
- return SSHApiFactory.get_api(host, user, identity)
-
- def _clean_processes(self):
- hostname = self.get("hostname")
- self.logger.info("Cleaning up processes on %s", hostname)
+ def clean_processes(self, killer = False):
+ self.info("Cleaning up processes")
+
+ if killer:
+ # Hardcore kill
+ cmd = ("sudo -S killall python tcpdump || /bin/true ; " +
+ "sudo -S killall python tcpdump || /bin/true ; " +
+ "sudo -S kill $(ps -N -T -o pid --no-heading | grep -v $PPID | sort) || /bin/true ; " +
+ "sudo -S killall -u root || /bin/true ; " +
+ "sudo -S killall -u root || /bin/true ; ")
+ else:
+ # Be gentler...
+ cmd = ("sudo -S killall tcpdump || /bin/true ; " +
+ "sudo -S killall tcpdump || /bin/true ; " +
+ "sudo -S killall -u %s || /bin/true ; " % self.get("username") +
+ "sudo -S killall -u %s || /bin/true ; " % self.get("username"))
+
+
+ out = err = ""
+ (out, err), proc = self.execute(cmd, retry = 1, with_lock = True)
+
+ def clean_home(self):
+ self.info("Cleaning up home")
+
+ cmd = ("cd %s ; " % self.home +
+ "find . -maxdepth 1 \( -name '.cache' -o -name '.local' -o -name '.config' -o -name 'nepi-*' \)"+
+ " -execdir rm -rf {} + ")
+
+ out = err = ""
+ (out, err), proc = self.execute(cmd, with_lock = True)
+
+ def upload(self, src, dst, text = False):
+ """ Copy content to destination
+
+ src content to copy. Can be a local file, directory or a list of files
+
+ dst destination path on the remote host (remote is always self.host)
+
+ text src is text input, it must be stored into a temp file before uploading
+ """
+ # If source is a string input
+ f = None
+ if text and not os.path.isfile(src):
+ # src is text input that should be uploaded as file
+ # create a temporal file with the content to upload
+ f = tempfile.NamedTemporaryFile(delete=False)
+ f.write(src)
+ f.close()
+ src = f.name
+
+ if not self.localhost:
+ # Build destination as <user>@<server>:<path>
+ dst = "%s@%s:%s" % (self.get("username"), self.get("hostname"), dst)
+
+ result = self.copy(src, dst)
+
+ # clean up temp file
+ if f:
+ os.remove(f.name)
+
+ return result
+
+ def download(self, src, dst):
+ if not self.localhost:
+ # Build destination as <user>@<server>:<path>
+ src = "%s@%s:%s" % (self.get("username"), self.get("hostname"), src)
+ return self.copy(src, dst)
+
+ def install_packages(self, packages, home = None):
+ home = home or self.node_dir
+
+ cmd = ""
+ if self.os in ["f12", "f14"]:
+ cmd = rpmfuncs.install_packages_command(self.os, packages)
+ elif self.os in ["debian", "ubuntu"]:
+ cmd = debfuncs.install_packages_command(self.os, packages)
+ else:
+ msg = "Error installing packages ( OS not known ) "
+ self.error(msg, self.os)
+ raise RuntimeError, msg
+
+ out = err = ""
+ (out, err), proc = self.run_and_wait(cmd, home,
+ pidfile = "instpkg_pid",
+ stdout = "instpkg_log",
+ stderr = "instpkg_err",
+ raise_on_error = True)
+
+ return (out, err), proc
+
+ def remove_packages(self, packages, home = None):
+ home = home or self.node_dir
+
+ cmd = ""
+ if self.os in ["f12", "f14"]:
+ cmd = rpmfuncs.remove_packages_command(self.os, packages)
+ elif self.os in ["debian", "ubuntu"]:
+ cmd = debfuncs.remove_packages_command(self.os, packages)
+ else:
+ msg = "Error removing packages ( OS not known ) "
+ self.error(msg)
+ raise RuntimeError, msg
+
+ out = err = ""
+ (out, err), proc = self.run_and_wait(cmd, home,
+ pidfile = "rmpkg_pid",
+ stdout = "rmpkg_log",
+ stderr = "rmpkg_err",
+ raise_on_error = True)
+
+ return (out, err), proc
+
+ def mkdir(self, path, clean = False):
+ if clean:
+ self.rmdir(path)
+
+ return self.execute("mkdir -p %s" % path, with_lock = True)
+
+ def rmdir(self, path):
+ return self.execute("rm -rf %s" % path, with_lock = True)
+
+ def run_and_wait(self, command,
+ home = ".",
+ pidfile = "pid",
+ stdin = None,
+ stdout = 'stdout',
+ stderr = 'stderr',
+ sudo = False,
+ raise_on_error = False):
+ """ runs a command in background on the remote host, but waits
+ until the command finishes execution.
+ This is more robust than doing a simple synchronized 'execute',
+ since in the remote host the command can continue to run detached
+ even if network disconnections occur
+ """
+ # run command in background in remote host
+ (out, err), proc = self.run(command, home,
+ pidfile = pidfile,
+ stdin = stdin,
+ stdout = stdout,
+ stderr = stderr,
+ sudo = sudo)
+
+ # check no errors occurred
+ if proc.poll() and err:
+ msg = " Failed to run command '%s' " % command
+ self.error(msg, out, err)
+ if raise_on_error:
+ raise RuntimeError, msg
+
+ # Wait for pid file to be generated
+ pid, ppid = self.wait_pid(
+ home = home,
+ pidfile = pidfile,
+ raise_on_error = raise_on_error)
+
+ # wait until command finishes to execute
+ self.wait_run(pid, ppid)
+
+ # check if execution errors occurred
+ (out, err), proc = self.check_output(home, stderr)
+
+ if err or out:
+ msg = " Failed to run command '%s' " % command
+ self.error(msg, out, err)
+
+ if raise_on_error:
+ raise RuntimeError, msg
- cmds = [
- "sudo -S killall python tcpdump || /bin/true ; "
- "sudo -S killall python tcpdump || /bin/true ; "
- "sudo -S kill $(ps -N -T -o pid --no-heading | grep -v $PPID | sort) || /bin/true ",
- "sudo -S killall -u root || /bin/true ",
- "sudo -S killall -u root || /bin/true ",
- ]
-
- api = self.api
- for cmd in cmds:
- out, err = api.execute(cmd)
- if err:
- self.logger.error(err)
+ return (out, err), proc
+
+ def wait_pid(self, home = ".", pidfile = "pid", raise_on_error = False):
+ """ Waits until the pid file for the command is generated,
+ and returns the pid and ppid of the process """
+ pid = ppid = None
+ delay = 1.0
+ for i in xrange(5):
+ pidtuple = self.checkpid(home = home, pidfile = pidfile)
+
+ if pidtuple:
+ pid, ppid = pidtuple
+ break
+ else:
+ time.sleep(delay)
+ delay = min(30,delay*1.2)
+ else:
+ msg = " Failed to get pid for pidfile %s/%s " % (
+ home, pidfile )
+ self.error(msg)
+
+ if raise_on_error:
+ raise RuntimeError, msg
+
+ return pid, ppid
+
+ def wait_run(self, pid, ppid, trial = 0):
+ """ wait for a remote process to finish execution """
+ delay = 1.0
+ first = True
+ bustspin = 0
+
+ while True:
+ status = self.status(pid, ppid)
- def _clean_home(self):
- hostname = self.get("hostname")
- self.logger.info("Cleaning up home on %s", hostname)
-
- cmds = [
- "find . -maxdepth 1 ! -name '.bash*' ! -name '.' -execdir rm -rf {} + "
- ]
-
- api = self.api
- for cmd in cmds:
- out, err = api.execute(cmd)
- if err:
- self.logger.error(err)
+ if status is sshfuncs.FINISHED:
+ break
+ elif status is not sshfuncs.RUNNING:
+ bustspin += 1
+ time.sleep(delay*(5.5+random.random()))
+ if bustspin > 12:
+ break
+ else:
+ if first:
+ first = False
+
+ time.sleep(delay*(0.5+random.random()))
+ delay = min(30,delay*1.2)
+ bustspin = 0
+
+ def check_output(self, home, filename):
+ """ checks file content """
+ (out, err), proc = self.execute("cat %s" %
+ os.path.join(home, filename), with_lock = True)
+ return (out, err), proc
+
+ def is_alive(self):
+ if self.localhost:
+ return True
+
+ out = err = ""
+ try:
+ (out, err), proc = self.execute("echo 'ALIVE'", with_lock = True)
+ except:
+ import traceback
+ trace = traceback.format_exc()
+ msg = "Unresponsive host "
+ self.warn(msg, out, trace)
+ return False
+
+ if out.strip().startswith('ALIVE'):
+ return True
+ else:
+ msg = "Unresponsive host "
+ self.warn(msg, out, err)
+ return False
+
+ # TODO!
+ #if self.check_bad_host(out,err):
+ # self.blacklist()
+
+ def copy(self, src, dst):
+ if self.localhost:
+ (out, err), proc = execfuncs.lcopy(source, dest,
+ recursive = True)
+ else:
+ with self._lock:
+ (out, err), proc = sshfuncs.rcopy(
+ src, dst,
+ port = self.get("port"),
+ identity = self.get("identity"),
+ server_key = self.get("serverKey"),
+ recursive = True)
+
+ return (out, err), proc
+
+ def execute(self, command,
+ sudo = False,
+ stdin = None,
+ env = None,
+ tty = False,
+ forward_x11 = False,
+ timeout = None,
+ retry = 3,
+ err_on_timeout = True,
+ connect_timeout = 30,
+ persistent = True,
+ with_lock = False
+ ):
+ """ Notice that this invocation will block until the
+ execution finishes. If this is not the desired behavior,
+ use 'run' instead."""
+
+ if self.localhost:
+ (out, err), proc = execfuncs.lexec(command,
+ user = user,
+ sudo = sudo,
+ stdin = stdin,
+ env = env)
+ else:
+ if with_lock:
+ with self._lock:
+ (out, err), proc = sshfuncs.rexec(
+ command,
+ host = self.get("hostname"),
+ user = self.get("username"),
+ port = self.get("port"),
+ agent = True,
+ sudo = sudo,
+ stdin = stdin,
+ identity = self.get("identity"),
+ server_key = self.get("serverKey"),
+ env = env,
+ tty = tty,
+ forward_x11 = forward_x11,
+ timeout = timeout,
+ retry = retry,
+ err_on_timeout = err_on_timeout,
+ connect_timeout = connect_timeout,
+ persistent = persistent
+ )
+ else:
+ (out, err), proc = sshfuncs.rexec(
+ command,
+ host = self.get("hostname"),
+ user = self.get("username"),
+ port = self.get("port"),
+ agent = True,
+ sudo = sudo,
+ stdin = stdin,
+ identity = self.get("identity"),
+ server_key = self.get("serverKey"),
+ env = env,
+ tty = tty,
+ forward_x11 = forward_x11,
+ timeout = timeout,
+ retry = retry,
+ err_on_timeout = err_on_timeout,
+ connect_timeout = connect_timeout,
+ persistent = persistent
+ )
+
+ return (out, err), proc
+
+ def run(self, command,
+ home = None,
+ create_home = True,
+ pidfile = "pid",
+ stdin = None,
+ stdout = 'stdout',
+ stderr = 'stderr',
+ sudo = False):
+
+ self.debug("Running %s" % command)
+
+ if self.localhost:
+ (out, err), proc = execfuncs.lspawn(command, pidfile,
+ stdout = stdout,
+ stderr = stderr,
+ stdin = stdin,
+ home = home,
+ create_home = create_home,
+ sudo = sudo,
+ user = user)
+ else:
+ # Start process in a "daemonized" way, using nohup and heavy
+ # stdin/out redirection to avoid connection issues
+ with self._lock:
+ (out,err), proc = sshfuncs.rspawn(
+ command,
+ pidfile = pidfile,
+ home = home,
+ create_home = create_home,
+ stdin = stdin if stdin is not None else '/dev/null',
+ stdout = stdout if stdout else '/dev/null',
+ stderr = stderr if stderr else '/dev/null',
+ sudo = sudo,
+ host = self.get("hostname"),
+ user = self.get("username"),
+ port = self.get("port"),
+ agent = True,
+ identity = self.get("identity"),
+ server_key = self.get("serverKey")
+ )
+
+ return (out, err), proc
+
+ def checkpid(self, home = ".", pidfile = "pid"):
+ if self.localhost:
+ pidtuple = execfuncs.lcheckpid(os.path.join(home, pidfile))
+ else:
+ with self._lock:
+ pidtuple = sshfuncs.rcheckpid(
+ os.path.join(home, pidfile),
+ host = self.get("hostname"),
+ user = self.get("username"),
+ port = self.get("port"),
+ agent = True,
+ identity = self.get("identity"),
+ server_key = self.get("serverKey")
+ )
+
+ return pidtuple
+
+ def status(self, pid, ppid):
+ if self.localhost:
+ status = execfuncs.lstatus(pid, ppid)
+ else:
+ with self._lock:
+ status = sshfuncs.rstatus(
+ pid, ppid,
+ host = self.get("hostname"),
+ user = self.get("username"),
+ port = self.get("port"),
+ agent = True,
+ identity = self.get("identity"),
+ server_key = self.get("serverKey")
+ )
+
+ return status
+
+ def kill(self, pid, ppid, sudo = False):
+ out = err = ""
+ proc = None
+ status = self.status(pid, ppid)
+
+ if status == sshfuncs.RUNNING:
+ if self.localhost:
+ (out, err), proc = execfuncs.lkill(pid, ppid, sudo)
+ else:
+ with self._lock:
+ (out, err), proc = sshfuncs.rkill(
+ pid, ppid,
+ host = self.get("hostname"),
+ user = self.get("username"),
+ port = self.get("port"),
+ agent = True,
+ sudo = sudo,
+ identity = self.get("identity"),
+ server_key = self.get("serverKey")
+ )
+ return (out, err), proc
+
+ def check_bad_host(self, out, err):
+ badre = re.compile(r'(?:'
+ r'|Error: disk I/O error'
+ r')',
+ re.I)
+ return badre.search(out) or badre.search(err)
+
+ def blacklist(self):
+ # TODO!!!!
+ self.warn(" Blacklisting malfunctioning node ")
+ #import util
+ #util.appendBlacklist(self.hostname)
git://git.onelab.eu / nepi.git / blobdiff