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How to use iscsi_get_sessions method in autotest

Best Python code snippet using autotest_python

iscsi.py

Source:iscsi.py

...9import os10import re11from autotest.client import os_dep12from autotest.client.shared import utils, error13def iscsi_get_sessions():14    """15    Get the iscsi sessions activated16    """17    cmd = "iscsiadm --mode session"18    output = utils.system_output(cmd, ignore_status=True)19    sessions = []20    if "No active sessions" not in output:21        for session in output.splitlines():22            ip_addr = session.split()[2].split(',')[0]23            target = session.split()[3]24            sessions.append((ip_addr, target))25    return sessions26def iscsi_get_nodes():27    """28    Get the iscsi nodes29    """30    cmd = "iscsiadm --mode node"31    output = utils.system_output(cmd)32    pattern = r"(\d+\.\d+\.\d+\.\d+|\W:{2}\d\W):\d+,\d+\s+([\w\.\-:\d]+)"33    nodes = []34    if "No records found" not in output:35        nodes = re.findall(pattern, output)36    return nodes37def iscsi_login(target_name):38    """39    Login to a target with the target name40    :param target_name: Name of the target41    """42    cmd = "iscsiadm --mode node --login --targetname %s" % target_name43    output = utils.system_output(cmd)44    target_login = ""45    if "successful" in output:46        target_login = target_name47    return target_login48def iscsi_logout(target_name=None):49    """50    Logout from a target. If the target name is not set then logout all51    targets.52    :params target_name: Name of the target.53    """54    if target_name:55        cmd = "iscsiadm --mode node --logout -T %s" % target_name56    else:57        cmd = "iscsiadm --mode node --logout all"58    output = utils.system_output(cmd)59    target_logout = ""60    if "successful" in output:61        target_logout = target_name62    return target_logout63def iscsi_discover(portal_ip):64    """65    Query from iscsi server for available targets66    :param portal_ip: Ip for iscsi server67    """68    cmd = "iscsiadm -m discovery -t sendtargets -p %s" % portal_ip69    output = utils.system_output(cmd, ignore_status=True)70    session = ""71    if "Invalid" in output:72        logging.debug(output)73    else:74        session = output75    return session76class Iscsi(object):77    """78    Basic iscsi support class. Will handle the emulated iscsi export and79    access to both real iscsi and emulated iscsi device.80    """81    def __init__(self, params, root_dir="/tmp"):82        os_dep.command("iscsiadm")83        self.target = params.get("target")84        self.export_flag = False85        if params.get("portal_ip"):86            self.portal_ip = params.get("portal_ip")87        else:88            self.portal_ip = utils.system_output("hostname")89        if params.get("iscsi_thread_id"):90            self.id = params.get("iscsi_thread_id")91        else:92            self.id = utils.generate_random_string(4)93        self.initiator = params.get("initiator")94        if params.get("emulated_image"):95            self.initiator = None96            os_dep.command("tgtadm")97            emulated_image = params.get("emulated_image")98            self.emulated_image = os.path.join(root_dir, emulated_image)99            self.emulated_id = ""100            self.emulated_size = params.get("image_size")101            self.unit = self.emulated_size[-1].upper()102            self.emulated_size = self.emulated_size[:-1]103            # maps K,M,G,T => (count, bs)104            emulated_size = {'K': (1, 1),105                             'M': (1, 1024),106                             'G': (1024, 1024),107                             'T': (1024, 1048576),108                             }109            if self.unit in emulated_size:110                block_size = emulated_size[self.unit][1]111                size = int(self.emulated_size) * emulated_size[self.unit][0]112                self.create_cmd = ("dd if=/dev/zero of=%s count=%s bs=%sK"113                                   % (self.emulated_image, size, block_size))114    def logged_in(self):115        """116        Check if the session is login or not.117        """118        sessions = iscsi_get_sessions()119        login = False120        if self.target in map(lambda x: x[1], sessions):121            login = True122        return login123    def portal_visible(self):124        """125        Check if the portal can be found or not.126        """127        return bool(re.findall("%s$" % self.target,128                               iscsi_discover(self.portal_ip), re.M))129    def login(self):130        """131        Login session for both real iscsi device and emulated iscsi. Include132        env check and setup....

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