def _discoverServedSystems(instPf, shell, pathtools):
    logger.debug("Instance name: %s" % instPf.getInstance().getName())
    # we have to consider three ways how to configure served system:
    # 1) for one served SAP system using 'rdisp/mshost' and 'wdisp/server_info_location'
    # 2) for one or more served systems using 'wdisp/system_<xx>'
    # 3) for one or more served systems using 'wdisp/server_info_location'

    # when first approach used for configuration there is not
    # SID for served system - so it represented as Unknown SAP systems

    servedSystems = []
    for servedSystem in instPf.getServedSystems():
        # work with metadata-sources of different type
        # - with end-point (message server)
        # - pointing to server-info file
        sources = servedSystem.getMetadataSources()
        _, srcsWithoutEndps = partition(isSourceWithEndpoint, sources)

        # ServedSystem DO covers first two approaches of configuration
        # third one is configured in separate file (info.icr)
        # file also contains information about application servers

        # there are two ways how to configure using info.icr
        # a) specifying application servers without their instance information
        # b) specifying application server in scope of some instance

        # a) - this applied to the case when instance information or
        #      information about served system known in instance profile
        # b) - applied when instance profile does not have nor
        #      message server information nor info about served system

        # x) get information about served systems from siloc-sources
        # siloc-source file contains information about at least one
        # served system and corresponding application servers
        # possible cases:
        # - unknown sap system + app servers
        # - list of known sap systems + corresponding application servers

        systemsFromSrcFile = []
        for src in srcsWithoutEndps:
            systems = _discoverServedSystemsFromSiloc(shell, pathtools, src)
            systemsFromSrcFile.extend(systems)

        if not srcsWithoutEndps:
            # in case if served system does not have icr file
            servedSystems.append(servedSystem)
        elif (not isinstance(servedSystem.system, sap_webdisp.UnknownSystem)
              # if known information about served system but info.icr
              # bring additional info about application servers
              and len(systemsFromSrcFile) == 1):
            appServerEndpoints = systemsFromSrcFile[
                0].getApplicationServersEndpoints()
            _sys = sap_webdisp.ServedSystem(
                servedSystem.system, servedSystem.getMetadataSources(),
                servedSystem.getExternalServersEndpoints(),
                servedSystem.getDispatchOptions(), appServerEndpoints)
            servedSystems.append(_sys)
        else:
            servedSystems.extend(systemsFromSrcFile)
    return servedSystems
def DiscoveryMain(framework, creds_manager, cred_id):
    '@types: RichFramework, CredsManager, str -> list[osh]'

    config = (ovm_flow.DiscoveryConfigBuilder(framework)
        # parameters
        .bool_params(reportStoppedVMs=False)
        .int_params(commandExecutionDurationInMs=2000)
        # destination data
        .dest_data_params_as_int(protocol_port=None)
        .dest_data_params_as_str(hostId=None)).build()

    attr_name = Protocol.PROTOCOL_ATTRIBUTE_PORT
    port = int(config.protocol_port
            or creds_manager.get_attribute(cred_id, attr_name))

    host_id = config.hostId
    oshs = []
    warnings = []
    with closing(_createSshClient(framework, cred_id, port)) as client:
        execute = _get_initialized_execute_fn(
                    client, config.commandExecutionDurationInMs)
        server_configs = _discover_servers(execute)
        vm_configs, msgs_ = _discover_vms(execute)
        warnings.extend(msgs_)
        mgr_version = ovm_cli.get_version(client)
        logger.info("Report topology")
        if not config.reportStoppedVMs:
            is_running = lambda c: ovm_cli.is_vm_running(c.vm.status)
            running, stopped = fptools.partition(is_running, vm_configs)
            get_vm = ovm_cli.ShowVmCmd.Config.vm.fget
            info_on_stopped = '\n'.join(imap(comp(str, get_vm), stopped))
            logger.info("Stopped VMs are not reported: %s" % info_on_stopped)
            vm_configs = running
        oshs.extend(report(host_id, mgr_version, server_configs, vm_configs))
    return oshs, warnings
Exemple #3
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def _drop(msg, predicate, seq):
    ''' Drop elements from seq that doesn't satisfy predicate with logging
    message and count of skipped elements

    @types: str, (A -> bool), seq[A] -> list[A]'''
    with_, without = partition(predicate, seq)
    if without:
        logger.warn("Drop %s. %s" % (msg, len(without)))
    return with_
def discover_profiles(sap_utils):
    '''
    @return: default profile pair (path and content) and list of pairs of
            instance profiles
    @types: SapUtils -> tuple[tuple[str, str]?, list[tuple[str, str]]]
    '''
    try:
        profiles = get_profiles(sap_utils)
        default_pfs, other_pfs = partition(is_default_pf, profiles)
        return first(default_pfs), other_pfs
    except (Exception, JException), e:
        logger.warnException("Failed to discover profiles. %s" % e)
def discover_profiles(sap_utils):
    '''
    @return: default profile pair (path and content) and list of pairs of
            instance profiles
    @types: SapUtils -> tuple[tuple[str, str]?, list[tuple[str, str]]]
    '''
    try:
        profiles = get_profiles(sap_utils)
        default_pfs, other_pfs = partition(is_default_pf, profiles)
        return first(default_pfs), other_pfs
    except (Exception, JException), e:
        logger.warnException("Failed to discover profiles. %s" % e)
def _reportSystems(servedSystems,
                   processOsh,
                   shell,
                   connectionIp,
                   applicationOsh=None):
    resolveEndpoint = _getEndpResolveFn(shell, connectionIp)
    vector = ObjectStateHolderVector()

    softwareBuilder = sap.SoftwareBuilder()
    softwareReporter = sap.SoftwareReporter(softwareBuilder)
    linkR = sap.LinkReporter()

    #x) report details of served systems and relation with web-dispatcher
    for servedSystem in servedSystems:
        # report endpoints of external servers
        endpoints = servedSystem.getExternalServersEndpoints()
        endpoints = flatten(keep(resolveEndpoint, endpoints))
        results = (_reportServerEndp(e, processOsh, applicationOsh)
                   for e in endpoints)
        vector.addAll(map(third, results))

        # report message server endpoint (metadata-source)
        #        and application servers of served system
        sources = servedSystem.getMetadataSources()
        msgSources, sources = partition(isMessageServerSource, sources)
        logger.debug("Report %s msg sources" % len(msgSources))
        logger.debug("Report %s other sources" % len(sources))

        # process message server, report message server
        endpoints = keep(sap_webdisp.HasEndpoint.getEndpoint, msgSources)
        msgBuilder = sap.MessageServerBuilder()
        msgReporter = sap.CentralComponentReporter(msgBuilder)
        for e in flatten(keep(resolveEndpoint, endpoints)):
            e = netutils.createTcpEndpoint(e.getAddress(), e.getPort())
            endpOsh, hostOsh, eVector = _reportServerEndp(e, processOsh)
            vector.addAll(eVector)
            msgOsh = msgReporter.reportAnonymous(hostOsh)
            vector.add(msgOsh)
            vector.add(linkR.reportUsage(msgOsh, endpOsh))

        # process non message server sources
        sources = ifilter(isSourceWithEndpoint, sources)
        endpoints = keep(sap_webdisp.HasEndpoint.getEndpoint, sources)
        endpoints.extend(servedSystem.getApplicationServersEndpoints())
        endpoints = flatten(keep(resolveEndpoint, endpoints))
        for result in (_reportServerEndp(e, processOsh) for e in endpoints):
            endpOsh, hostOsh, eVector = result
            vector.addAll(eVector)
            appServerOsh = softwareReporter.reportUknownSoftware(hostOsh)
            vector.add(appServerOsh)
            vector.add(linkR.reportUsage(appServerOsh, endpOsh))
    return vector
def _reportSystems(servedSystems, processOsh, shell, connectionIp, applicationOsh=None):
    resolveEndpoint = _getEndpResolveFn(shell, connectionIp)
    vector = ObjectStateHolderVector()

    softwareBuilder = sap.SoftwareBuilder()
    softwareReporter = sap.SoftwareReporter(softwareBuilder)
    linkR = sap.LinkReporter()

    #x) report details of served systems and relation with web-dispatcher
    for servedSystem in servedSystems:
        # report endpoints of external servers
        endpoints = servedSystem.getExternalServersEndpoints()
        endpoints = flatten(keep(resolveEndpoint, endpoints))
        results = (_reportServerEndp(e, processOsh, applicationOsh) for e in endpoints)
        vector.addAll(map(third, results))

        # report message server endpoint (metadata-source)
        #        and application servers of served system
        sources = servedSystem.getMetadataSources()
        msgSources, sources = partition(isMessageServerSource, sources)
        logger.debug("Report %s msg sources" % len(msgSources))
        logger.debug("Report %s other sources" % len(sources))

        # process message server, report message server
        endpoints = keep(sap_webdisp.HasEndpoint.getEndpoint, msgSources)
        msgBuilder = sap.MessageServerBuilder()
        msgReporter = sap.CentralComponentReporter(msgBuilder)
        for e in flatten(keep(resolveEndpoint, endpoints)):
            e = netutils.createTcpEndpoint(e.getAddress(), e.getPort())
            endpOsh, hostOsh, eVector = _reportServerEndp(e, processOsh)
            vector.addAll(eVector)
            msgOsh = msgReporter.reportAnonymous(hostOsh)
            vector.add(msgOsh)
            vector.add(linkR.reportUsage(msgOsh, endpOsh))

        # process non message server sources
        sources = ifilter(isSourceWithEndpoint, sources)
        endpoints = keep(sap_webdisp.HasEndpoint.getEndpoint, sources)
        endpoints.extend(servedSystem.getApplicationServersEndpoints())
        endpoints = flatten(keep(resolveEndpoint, endpoints))
        for result in (_reportServerEndp(e, processOsh) for e in endpoints):
            endpOsh, hostOsh, eVector = result
            vector.addAll(eVector)
            appServerOsh = softwareReporter.reportUknownSoftware(hostOsh)
            vector.add(appServerOsh)
            vector.add(linkR.reportUsage(appServerOsh, endpOsh))
    return vector
Exemple #8
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def _discoverRfcDestinations(sapUtils, systemOsh, config):
    r'@types: SapUtils, osh, flow.DiscoveryConfigBuilder -> oshv'
    if not config.discoverRFCConnections:
        return ObjectStateHolderVector()

    logger.info('Discover RFC connections')
    getRfcCmd = sap_abap_discoverer.GetRfcDestinationsRfcCommand()
    connections = Sfn(getRfcCmd.getAllRfcConnections)(sapUtils) or ()
    logger.info("Found %s possible RFC connections" % len(connections))
    connections = filter(comp(sap_abap_discoverer.isEnglishVersion, third),
                         connections)
    logger.info("Found %s RFC connections with EN language" % len(connections))
    connByName = applyMapping(first, connections)
    destinations = getRfcCmd.getAllRfcDestinations(sapUtils)
    logger.info("Found %s RFC destinations" % len(destinations))
    # get destinations with valid host
    destinations = [d for d in destinations if _isDestFull(d)]
    logger.info("Found %s destinations with host available" % len(destinations))
    destinationsByHost = groupby(lambda d: d.targetHost, destinations)
    ips = map(Sfn(_resolve), destinationsByHost.iterkeys())

    pairIpToDestinations = zip(ips, destinationsByHost.itervalues())
    resolved, notResolved = partition(first, pairIpToDestinations)

    if notResolved:
        skippedDestsCount = sum([len(dests) for ip, dests in notResolved])
        logger.debug("%s destinations skipped due to not resolved %s hosts" %
                     (skippedDestsCount, len(notResolved)))

    vector = ObjectStateHolderVector()
    for ip, destinations in resolved:
        # TODO:
        # 1) query RFC connections (to get description) only for these
        # destinations as it will reduce amount of data fetched from system
        # One query for connections returns ~8K rows of data, while we are
        # interested in less than ~50 or even less
        # 2) another improvement query only records in English language
        countOfDests = len(destinations)
        host = first(destinations).targetHost
        reportDst = Sfn(_reportRfcDestination)
        logger.debug("%s destinations resolved for %s" % (countOfDests, host))
        vectors = (reportDst(dst, ip, connByName, systemOsh) for dst in destinations)
        each(vector.addAll, ifilter(None, vectors))
    return vector
Exemple #9
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def get_applicable_credentials(framework, portPattern):
    r'@types: Framework, str -> iterator[tuple[int, str]]'
    logger.debug('Getting applicable credentials to createClient')
    credIds = _get_sap_java_creds(framework)
    # get ports available on destination
    destPorts = framework.getTriggerCIDataAsList('sap_jmx_port') or ()
    destPorts = set(ifilter(portPattern.match, destPorts))
    portAttr = Protocol.PROTOCOL_ATTRIBUTE_PORT
    ports = [framework.getProtocolProperty(id_, portAttr) for id_ in credIds]
    # get SAP java credentials availabe in ucmdb
    # get as list of pairs (port, credential ID)
    portToCredId = izip(ports, credIds)
    # separate all credentials onto two groups - with port defined and without
    withPort, withoutPort = partition(first, portToCredId)
    return chain(
                # add credentials only if configured there port exists in dst
                 ((c, dp) for _, c in withoutPort for dp in destPorts),
                # create variations of credentials with all destination ports
                 ((c, p) for p, c in withPort if p in destPorts))
Exemple #10
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def discoverAllInstancesByNamesOnly(client):
    r''' Can be only applied for discovery by JMX due to deserialization
    limitatations of WebServices client
    @types: BaseSapJmxClient, DiscoveryConfig -> tuple[oshv, tuple[str]]'''
    discoverer = sap_jee_discoverer.ClusterDiscoverer(client)
    cluster, instanceNames = discoverer.getClusterDetails()
    parseInst = Sf(_createAnonymousInstFromFullName)
    insts = keep(parseInst, instanceNames)
    system = sap.System(cluster.getName())
    systemOsh, clusterOsh, vector = _reportSapSystem(system)
    ipsPerInst = zip(map(_resolveInstHostname, insts), insts)
    resolved, notResolved = partition(first, ipsPerInst)
    warnings = ()
    if notResolved:
        warnings = ("Some instances are not reported "
                    "due to unresolved address",)
    vectors = (third(reportInst(i, system, systemOsh, clusterOsh, ips))
               for ips, i in resolved)
    each(vector.addAll, vectors)
    return vector, warnings
Exemple #11
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def DiscoveryMain(framework, creds_manager, cred_id):
    '@types: RichFramework, CredsManager, str -> list[osh]'

    config = (
        ovm_flow.DiscoveryConfigBuilder(framework)
        # parameters
        .bool_params(reportStoppedVMs=False).int_params(
            commandExecutionDurationInMs=2000)
        # destination data
        .dest_data_params_as_int(protocol_port=None).dest_data_params_as_str(
            hostId=None)).build()

    attr_name = Protocol.PROTOCOL_ATTRIBUTE_PORT
    port = int(config.protocol_port
               or creds_manager.get_attribute(cred_id, attr_name))

    host_id = config.hostId
    oshs = []
    warnings = []
    with closing(_createSshClient(framework, cred_id, port)) as client:
        execute = _get_initialized_execute_fn(
            client, config.commandExecutionDurationInMs)
        server_configs = _discover_servers(execute)
        vm_configs, msgs_ = _discover_vms(execute)
        warnings.extend(msgs_)
        mgr_version = ovm_cli.get_version(client)
        logger.info("Report topology")
        if not config.reportStoppedVMs:
            is_running = lambda c: ovm_cli.is_vm_running(c.vm.status)
            running, stopped = fptools.partition(is_running, vm_configs)
            get_vm = ovm_cli.ShowVmCmd.Config.vm.fget
            info_on_stopped = '\n'.join(imap(comp(str, get_vm), stopped))
            logger.info("Stopped VMs are not reported: %s" % info_on_stopped)
            vm_configs = running
        oshs.extend(report(host_id, mgr_version, server_configs, vm_configs))
    return oshs, warnings
def _discoverServedSystems(instPf, shell, pathtools):
    logger.debug("Instance name: %s" % instPf.getInstance().getName())
    # we have to consider three ways how to configure served system:
    # 1) for one served SAP system using 'rdisp/mshost' and 'wdisp/server_info_location'
    # 2) for one or more served systems using 'wdisp/system_<xx>'
    # 3) for one or more served systems using 'wdisp/server_info_location'

    # when first approach used for configuration there is not
    # SID for served system - so it represented as Unknown SAP systems

    servedSystems = []
    for servedSystem in instPf.getServedSystems():
        # work with metadata-sources of different type
        # - with end-point (message server)
        # - pointing to server-info file
        sources = servedSystem.getMetadataSources()
        _, srcsWithoutEndps = partition(isSourceWithEndpoint, sources)

        # ServedSystem DO covers first two approaches of configuration
        # third one is configured in separate file (info.icr)
        # file also contains information about application servers

        # there are two ways how to configure using info.icr
        # a) specifying application servers without their instance information
        # b) specifying application server in scope of some instance

        # a) - this applied to the case when instance information or
        #      information about served system known in instance profile
        # b) - applied when instance profile does not have nor
        #      message server information nor info about served system

        # x) get information about served systems from siloc-sources
        # siloc-source file contains information about at least one
        # served system and corresponding application servers
        # possible cases:
        # - unknown sap system + app servers
        # - list of known sap systems + corresponding application servers

        systemsFromSrcFile = []
        for src in srcsWithoutEndps:
            systems = _discoverServedSystemsFromSiloc(shell, pathtools, src)
            systemsFromSrcFile.extend(systems)

        if not srcsWithoutEndps:
            # in case if served system does not have icr file
            servedSystems.append(servedSystem)
        elif (not isinstance(servedSystem.system, sap_webdisp.UnknownSystem)
            # if known information about served system but info.icr
            # bring additional info about application servers
            and len(systemsFromSrcFile) == 1):
            appServerEndpoints = systemsFromSrcFile[0].getApplicationServersEndpoints()
            _sys = sap_webdisp.ServedSystem(
                                    servedSystem.system,
                                    servedSystem.getMetadataSources(),
                                    servedSystem.getExternalServersEndpoints(),
                                    servedSystem.getDispatchOptions(),
                                    appServerEndpoints)
            servedSystems.append(_sys)
        else:
            servedSystems.extend(systemsFromSrcFile)
    return servedSystems
Exemple #13
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def reportTrexHostNode(hostNode, topology, isBiaProduct):
    r'@types: TrexTopologyConfig.HostNode, TrexTopologyConfig, bool -> ObjectStateHolderVector'
    trexBuilder = sap_trex.Builder()
    trexReporter = sap_trex.Reporter(trexBuilder)
    hostReporter = sap_trex.HostReporter(sap_trex.HostBuilder())
    endpointReporter = netutils.EndpointReporter(
        netutils.ServiceEndpointBuilder())
    linkReporter = sap.LinkReporter()
    softwareBuilder = sap.SoftwareBuilder()
    # x) create sap system
    system = hostNode.system
    vector = ObjectStateHolderVector()

    # process NameServer endpoints and ignore loopback endpoints
    isLoopbackEndpoint = lambda e: netutils.isLoopbackIp(e.getAddress())
    _, endpoints = fptools.partition(isLoopbackEndpoint,
                                     hostNode.nameServerEndpoints)
    # x) create host OSH
    hostOsh = hostReporter.reportHostByHostname(hostNode.name)
    vector.add(hostOsh)
    # x) report IPs
    ips = map(netutils.Endpoint.getAddress, endpoints)
    ipOshs = map(modeling.createIpOSH, ips)
    fptools.each(vector.add, ipOshs)
    #vector.addAll(ipOshs)
    # x) report containment between host nad ips
    reportContainment = fptools.partiallyApply(linkReporter.reportContainment,
                                               hostOsh, fptools._)
    fptools.each(vector.add, map(reportContainment, ipOshs))
    # x) report end-points
    reportEndpoint = fptools.partiallyApply(endpointReporter.reportEndpoint,
                                            fptools._, hostOsh)
    endpointOshs = map(reportEndpoint, endpoints)
    fptools.each(vector.add, endpointOshs)
    # x) report TREX instance itself
    instanceOsh = trexReporter.reportInstance(first(system.getInstances()),
                                              hostOsh)
    # x) mark as BIA or plain-TREX
    productName = (isBiaProduct and sap_trex.Product.BIA.instanceProductName
                   or sap_trex.Product.TREX.instanceProductName)
    softwareBuilder.updateDiscoveredProductName(instanceOsh, productName)
    # x) set name server role (master, slave or 1st master)
    nameServerPort = first(endpoints).getPort()
    nameServerEndpoint = netutils.createTcpEndpoint(hostNode.name,
                                                    nameServerPort)
    topologyGlobals = topology.getGlobals()
    isMaster = nameServerEndpoint in (fptools.safeFunc(
        topologyGlobals.getMasterEndpoints)() or ())
    isActiveMaster = nameServerEndpoint in (fptools.safeFunc(
        topologyGlobals.getActiveMasterEndpoints)() or ())
    trexBuilder.updateNameServerMode(
        instanceOsh,
        (isMaster and
         (isActiveMaster and sap_trex.NameServerMode.FIRST_MASTER
          or sap_trex.NameServerMode.MASTER) or sap_trex.NameServerMode.SLAVE))

    vector.add(instanceOsh)
    # x) DO NOT report 'membership' between system and instance
    # Explanation:
    # sometimes you can discover systems that don't have relationship to current host.
    # This can lead to incorrect merging of to systems (inside OSH vector)
    # systemOsh = trexReporter.reportSystem(system)
    # vector.add(systemOsh)
    # vector.add(linkReporter.reportMembership(systemOsh, instanceOsh))

    # x) report 'usage' between instance and endpoints of name-server
    reportUsage = fptools.partiallyApply(linkReporter.reportUsage, instanceOsh,
                                         fptools._)
    fptools.each(vector.add, map(reportUsage, endpointOshs))
    return vector
def reportTrexHostNode(hostNode, topology, isBiaProduct):
    r'@types: TrexTopologyConfig.HostNode, TrexTopologyConfig, bool -> ObjectStateHolderVector'
    trexBuilder = sap_trex.Builder()
    trexReporter = sap_trex.Reporter(trexBuilder)
    hostReporter = sap_trex.HostReporter(sap_trex.HostBuilder())
    endpointReporter = netutils.EndpointReporter(netutils.ServiceEndpointBuilder())
    linkReporter = sap.LinkReporter()
    softwareBuilder = sap.SoftwareBuilder()
    # x) create sap system
    system = hostNode.system
    vector = ObjectStateHolderVector()

    # process NameServer endpoints and ignore loopback endpoints
    isLoopbackEndpoint = lambda e: netutils.isLoopbackIp(e.getAddress())
    _, endpoints = fptools.partition(isLoopbackEndpoint,
                                  hostNode.nameServerEndpoints)
    # x) create host OSH
    hostOsh = hostReporter.reportHostByHostname(hostNode.name)
    vector.add(hostOsh)
    # x) report IPs
    ips = map(netutils.Endpoint.getAddress, endpoints)
    ipOshs = map(modeling.createIpOSH, ips)
    fptools.each(vector.add, ipOshs)
    #vector.addAll(ipOshs)
    # x) report containment between host nad ips
    reportContainment = fptools.partiallyApply(linkReporter.reportContainment, hostOsh, fptools._)
    fptools.each(vector.add, map(reportContainment, ipOshs))
    # x) report end-points
    reportEndpoint = fptools.partiallyApply(endpointReporter.reportEndpoint, fptools._, hostOsh)
    endpointOshs = map(reportEndpoint, endpoints)
    fptools.each(vector.add, endpointOshs)
    # x) report TREX instance itself
    instanceOsh = trexReporter.reportInstance(first(system.getInstances()), hostOsh)
    # x) mark as BIA or plain-TREX
    productName = (isBiaProduct
                   and sap_trex.Product.BIA.instanceProductName
                   or sap_trex.Product.TREX.instanceProductName)
    softwareBuilder.updateDiscoveredProductName(instanceOsh, productName)
    # x) set name server role (master, slave or 1st master)
    nameServerPort = first(endpoints).getPort()
    nameServerEndpoint = netutils.createTcpEndpoint(hostNode.name, nameServerPort)
    topologyGlobals = topology.getGlobals()
    isMaster = nameServerEndpoint in (
                    fptools.safeFunc(topologyGlobals.getMasterEndpoints)() or ()
    )
    isActiveMaster = nameServerEndpoint in (
                    fptools.safeFunc(topologyGlobals.getActiveMasterEndpoints)() or ()
    )
    trexBuilder.updateNameServerMode( instanceOsh,
                (isMaster
                 and (isActiveMaster
                      and sap_trex.NameServerMode.FIRST_MASTER
                      or  sap_trex.NameServerMode.MASTER)
                 or sap_trex.NameServerMode.SLAVE))

    vector.add(instanceOsh)
    # x) DO NOT report 'membership' between system and instance
    # Explanation:
    # sometimes you can discover systems that don't have relationship to current host.
    # This can lead to incorrect merging of to systems (inside OSH vector)
    # systemOsh = trexReporter.reportSystem(system)
    # vector.add(systemOsh)
    # vector.add(linkReporter.reportMembership(systemOsh, instanceOsh))

    # x) report 'usage' between instance and endpoints of name-server
    reportUsage = fptools.partiallyApply(linkReporter.reportUsage, instanceOsh, fptools._)
    fptools.each(vector.add, map(reportUsage, endpointOshs))
    return vector