WO2022021853A1 - 一种iscsi多路径管理系统、方法、设备及存储介质 - Google Patents

一种iscsi多路径管理系统、方法、设备及存储介质 Download PDF

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Publication number
WO2022021853A1
WO2022021853A1 PCT/CN2021/076940 CN2021076940W WO2022021853A1 WO 2022021853 A1 WO2022021853 A1 WO 2022021853A1 CN 2021076940 W CN2021076940 W CN 2021076940W WO 2022021853 A1 WO2022021853 A1 WO 2022021853A1
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Prior art keywords
iscsi
white list
black
path
list rules
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PCT/CN2021/076940
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English (en)
French (fr)
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蔺昊天
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苏州浪潮智能科技有限公司
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Priority to US18/005,707 priority Critical patent/US11909634B2/en
Publication of WO2022021853A1 publication Critical patent/WO2022021853A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/54—Organization of routing tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/24—Multipath
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • the present application relates to the field of storage technologies, and in particular, to an iscsi multi-path management system, method, electronic device, and computer-readable storage medium.
  • iscsi Internet Small Computer System Interface, Internet Small Computer System Interface
  • IP network communication and SCSI storage interface IP network communication and SCSI storage interface.
  • the iscsi technology can directly utilize the existing network topology, save costs and be easy to use, so it is widely used in the storage field.
  • Multi-path technology can aggregate and manage the same device under multiple links on the host side, improve the transmission rate, and provide features such as load balancing and failover.
  • the so-called multi-path technology refers to the technology that the host and the storage device are connected and aggregated through multiple paths at the same time.
  • the path is generally fixed after the configuration is completed.
  • the link between the client and the storage end is uncertain, which may increase with the expansion of the network topology;
  • the type of load traffic on the link is also uncertain, which can be It is used to carry iscsi traffic, and it may also need to be used to carry external business traffic. In this way, in the related art, it is necessary to repeatedly change and adjust the relevant configuration in the management system, which is inefficient.
  • the purpose of this application is to provide an iscsi multi-path management system, method, electronic device and computer-readable storage medium, so as to effectively realize adaptive adjustment according to the needs and changes of application scenarios, and improve the applicability of the multi-path management system, And simplify configuration workload and improve efficiency.
  • the present application discloses an iscsi multi-path management system, including a connection module and a routing module deployed on a client;
  • the routing module is configured to update and maintain a routing table in real time according to the current network topology, and the routing table records a legal path between the storage terminal and the client that conforms to the black and white list rules;
  • the connection module includes a connector and a storage volume manager, and the connector is used to find each iscsi target on the storage end that conforms to the black and white list rules, so as to establish an iscsi session through the legal path and notify the storage volume
  • the manager performs the mount volume operation; and periodically re-checks the established iscsi session according to the updated black and white list rules, and regularly updates and obtains the iscsi target on the storage side, so as to be consistent with the newly acquired one after the update.
  • the iscsi target of the blacklist rule establishes an iscsi session.
  • the black and white list rules are stored in the form of a black list and/or a white list, and the black list and the white list are generated by the routing module according to the input configuration instruction;
  • the blacklist records the port IPs and network links that are not allowed to carry the iscsi traffic; the whitelist records the port IPs and network links that are allowed to carry the iscsi traffic.
  • the routing module includes:
  • a first initialization unit configured to determine, according to the black and white list rules, the port IP and network link allowed to carry iscsi traffic in the storage end, so as to form a first IP set and a first link set respectively;
  • a second initialization unit configured to determine, according to the black and white list rules, network links in the client that are allowed to carry iscsi traffic to form a second link set;
  • an update adjustment unit configured to obtain regularly and update the first IP set, the first link set, and the second link set respectively according to the updated black and white list rules
  • a path generation unit configured to configure a legal path with the client for each port IP in the first IP set in the legal network topology; the legal network topology is composed of the first link set and the first IP set.
  • the network topology composed of two link sets.
  • the path generation unit is specifically used for:
  • a legal path to the client is configured for each port IP in the first IP set in the legal network topology.
  • the routing module further includes:
  • a third initialization unit configured to determine, according to the black and white list rules, network links allowed to carry iscsi traffic among other devices in the network to form a third link set;
  • the legal network topology is a network topology composed of the first link set, the second link set and the third link set.
  • the connector when the connector periodically re-checks the established session according to the updated black and white list rules, it is specifically used for:
  • the connector is also used for:
  • the present application also discloses an iscsi multi-path management method, which is applied to a client, where a routing table that is updated and maintained in real time according to the current network topology is stored in the client, and the routing table records the storage A legal path between the client and the client that complies with the black and white list rules; the method includes:
  • the black and white list rules are stored in the form of a black list and/or a white list, and the black list and the white list are generated according to input configuration instructions;
  • the blacklist records the port IPs and network links that are not allowed to carry the iscsi traffic; the whitelist records the port IPs and network links that are allowed to carry the iscsi traffic.
  • the generating process of the routing table includes:
  • the black and white list rules determine the port IP and network link allowed to carry iscsi traffic in the storage end, so as to form a first IP set and a first link set respectively;
  • a legal path to the client is configured for each port IP in the first IP set; the legal network topology is composed of the first link set and the second link set Network topology.
  • configuring a legal path with the client for each port IP in the first IP set in the legal network topology includes:
  • a legal path to the client is configured for each port IP in the first IP set in the legal network topology.
  • the generating process of the routing table further includes:
  • network links allowed to carry iscsi traffic among other devices in the network are determined to form a third link set; the legal network topology is composed of the first link set, the second link The network topology formed by the set and the third link set.
  • the established session is periodically re-checked, including:
  • the method further includes:
  • the storage volume manager is notified to perform a volume unmounting operation.
  • the present application also discloses an electronic device, comprising:
  • the present application also discloses a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, any one of the above-mentioned iscsi Steps of a multipath management method.
  • the iscsi multi-path management system, method, electronic device and computer-readable storage medium provided by the present application have the beneficial effects of: using the routing module to update and set the legal paths that are allowed to carry the iscsi traffic in real time, so that the connection module can carry out the iscsi traffic according to the corresponding legal path.
  • the path creates an iscsi session for the corresponding iscsi target, and regularly updates the black and white list rules and the iscsi target on the storage side, so as to realize adaptive iscsi path adjustment under various application scenarios and application requirements, that is, all iscsi targets can be automatically queried, And automatically connect to legal iscsi targets, and automatically log out invalid and illegal iscsi sessions, therefore, the application effectively improves the applicability of the multi-path management system, greatly simplifies the configuration workload, and improves management efficiency.
  • FIG. 1 is a structural block diagram of an iscsi multi-path management system disclosed in an embodiment of the application;
  • FIG. 3 is a structural block diagram of an electronic device disclosed in an embodiment of this application.
  • the core of the present application is to provide an iscsi multi-path management system, method, electronic device and computer-readable storage medium, so as to effectively realize adaptive adjustment according to the needs and changes of application scenarios, and improve the applicability of the multi-path management system, And simplify configuration workload and improve efficiency.
  • iscsi Internet Small Computer System Interface, Internet Small Computer System Interface
  • IP network communication and SCSI storage interface IP network communication and SCSI storage interface.
  • the iscsi technology can directly utilize the existing network topology, save costs and be easy to use, so it is widely used in the storage field.
  • Multi-path technology can aggregate and manage the same device under multiple links on the host side, improve the transmission rate, and provide features such as load balancing and failover.
  • the so-called multi-path technology refers to the technology that the host and the storage device are connected and aggregated through multiple paths at the same time.
  • the path is generally fixed after the configuration is completed.
  • the link between the client and the storage end is uncertain, which may increase with the expansion of the network topology;
  • the type of load traffic on the link is also uncertain, which can be It is used to carry iscsi traffic, and it may also need to be used to carry external business traffic. In this way, in the related art, it is necessary to repeatedly change and adjust the relevant configuration in the management system, which is inefficient.
  • the present application provides a set of iscsi multi-path management solutions, which can effectively solve the above problems.
  • an embodiment of the present application discloses an iscsi multi-path management system, which mainly includes a connection module 100 and a routing module 200 deployed on a client;
  • the routing module 200 is configured to update and maintain the routing table in real time according to the current network topology, and the routing table records the legal path between the storage terminal and the client that conforms to the black and white list rules;
  • the connection module 100 includes a connector 101 and a storage volume manager 102.
  • the connector 101 is used to find each iscsi target on the storage side that conforms to the black and white list rules, so as to establish an iscsi session through a legal path, and notify the storage volume manager 102 to mount the volume. Operation; and periodically re-check the established session according to the updated black and white list rules, and regularly update and obtain the iscsi target on the storage side, so as to establish iscsi with the newly acquired iscsi target that conforms to the updated black and white list rules session.
  • connection module 100 is used to perform an adaptive connection between the client and the storage end, that is, to establish a corresponding iscsi session, manage legal connections and restrict illegal connections.
  • Connection the routing module 200 is used to configure routing legal paths under manual planning, and automatically adjust the connection paths in the network topology.
  • the routing module 200 specifically configures legal paths according to the black and white list rules.
  • the legal path refers to the path that is allowed to carry iscsi traffic by the blacklist and whitelist rules, that is, the path that is allowed to execute the iscsi service.
  • the black and white list rules can be managed and set by the administrator.
  • the connector 101 may specifically be a service that is self-started on the host of the client. After startup, the connector 101 can access the storage end after the dependent service is ready to start, query each iscsi target on the storage end, and determine whether each iscsi target conforms to the black and white list rules, and if so, can connect the port IP of the iscsi target, A corresponding iscsi session is established, and the storage volume manager 102 is notified to perform a volume mount operation for the volume corresponding to the iscsi session.
  • the connector 101 after initially completing the establishment of the iscsi session between the client and the storage end, the connector 101 will continuously and regularly obtain the updated black and white list rules, and recheck the established iscsi session. The so-called re-check is to repeatedly check whether the iscsi session complies with the updated black and white list rules.
  • the session can be maintained; otherwise, the iscsi session is logged out.
  • the solution provided by the present application is also applicable to the scenario where the network topology is constantly changing. Therefore, in this application, after the iscsi session between the client and the storage end is initially established, the connected machine will constantly update and obtain the iscsi target on the storage end, and determine whether there are any additional iscsi targets that also meet the black and white list rules. The new iscsi target to also establish iscsi sessions.
  • the iscsi multi-path management system disclosed in the embodiment of the present application utilizes the routing module 200 to update and set the legal paths allowed to carry the iscsi traffic in real time, so that the connection module 100 creates the iscsi session for the corresponding iscsi target according to the corresponding legal path, and Regularly update black and white list rules and iscsi targets on the storage side, so that adaptive iscsi path adjustment can be realized under various application scenarios and application requirements, that is, all iscsi targets can be automatically queried, and valid iscsi targets can be automatically connected and automatically logged out. Invalid and illegal iscsi sessions, therefore, the present application effectively improves the applicability of the multi-path management system, greatly simplifies the configuration workload, and improves management efficiency.
  • the iscsi multi-path management system disclosed in the embodiment of the present application is based on the above content, the black and white list rules are stored in the form of black list and/or white list, and the black list and white list are stored by the routing module 200 Generated according to input configuration directives; where,
  • the blacklist records the port IPs and network links that are not allowed to carry iscsi traffic; the whitelist records the port IPs and network links that are allowed to carry iscsi traffic.
  • the port IP and network link of each object are recorded in the blacklist or whitelist. Therefore, when the port IP of an iscsi target appears in the blacklist, the iscsi target will be regarded as an illegal path in the iscsi path management; and when the port IP of an iscsi target appears in the whitelist, then This iscsi target will be treated as a legal path in iscsi path management.
  • the routing module 200 includes:
  • the first initialization unit is configured to determine, according to the black and white list rules, the port IP and network link allowed to carry the iscsi traffic in the storage end, so as to form the first IP set and the first link set respectively;
  • the second initialization unit is configured to determine, according to the black and white list rules, the network links allowed to carry iscsi traffic in the client to form a second link set;
  • an update adjustment unit configured to obtain regularly and update the first IP set, the first link set, and the second link set respectively according to the updated black and white list rules
  • the path generating unit is configured to configure a legal path with the client for each port IP in the first IP set in the legal network topology; the legal network topology is a network topology composed of the first link set and the second link set.
  • the first link set is L1 and the second link set is L2 to form a legal network topology T.
  • each group ⁇ linka, lb> includes multiple legal paths.
  • linka and lb are elements in the first link set L1 and the second link set L2, respectively.
  • the routing module 200 can further plan a legal path to the client for each port IP in the first IP set I in the legal network topology T, and configure a routing table.
  • the path generation unit is specifically used for:
  • a legal path to the client is configured for each port IP in the first IP set in the legal network topology.
  • the routing module 200 when configuring the routing table, the routing module 200 selects the relevant links according to the load balancing principle.
  • the routing module 200 further includes:
  • a third initialization unit configured to determine, according to the black and white list rules, network links allowed to carry iscsi traffic among other devices in the network to form a third link set;
  • the legal network topology is the network topology composed of the first link set, the second link set and the third link set.
  • this embodiment also considers that there will be other devices in the storage system besides the storage end and the client. If the relevant network links constructed by other devices are allowed to carry iscsi traffic, they can also constitute a legal network topology. T.
  • the iscsi multi-path management system disclosed in the embodiment of the present application is based on the above content, when the connector 101 regularly re-checks the established session according to the updated black and white list rules, specifically Used for:
  • the iscsi multi-path management system disclosed in the embodiment of the present application is based on the above content, and the connector 101 is also used for:
  • the storage volume manager 102 After all the iscsi sessions that are in an unavailable state or do not meet the updated black and white list rules are logged out, if there are no remaining valid iscsi sessions, the storage volume manager 102 is notified to perform a volume unmounting operation.
  • the so-called valid iscsi session refers to the iscsi session that is available and that is reserved according to the updated black and white list rules.
  • the storage volume manager 102 can specifically obtain the UUID (Universally Unique Identifier, Universal Unique Identifier) of the corresponding storage volume when performing the mount volume operation, and query whether there is a multi-path corresponding to the UUID by accessing the multi-path driver. Path device, if it exists, mount the multi-path device; otherwise, return the corresponding prompt information.
  • UUID Universal Unique Identifier
  • the storage volume manager 102 When the storage volume manager 102 performs the unloading volume operation, it can specifically obtain the UUID of the corresponding storage volume, determine the multi-path device corresponding to the UUID by accessing the multi-path driver, and query the iscsi in each iscsi session corresponding to the multi-path device. device, delete the queried iscsi devices, and then delete the multipath device.
  • an embodiment of the present application discloses an iscsi multi-path management method, which is applied to a client.
  • the client stores a routing table that is updated and maintained in real time according to the current network topology structure, and the routing table records the storage terminal.
  • Legal paths to and from clients that conform to blacklist and whitelist rules; methods include:
  • S201 Find each iscsi target on the storage end that conforms to the black and white list rules.
  • S202 Establish an iscsi session with an iscsi target that conforms to the black and white list rules through a legal path, and perform a corresponding volume mount operation.
  • S204 Regularly update the iscsi target on the acquired storage end, so as to establish an iscsi session with the newly acquired iscsi target that conforms to the updated black and white list rules.
  • this application updates and sets the legal paths that are allowed to carry iscsi traffic in real time, so as to create iscsi sessions for the corresponding iscsi targets according to the corresponding legal paths, and regularly update the black and white list rules and the iscsi targets on the storage side, so that it can be implemented in a variety of applications.
  • Adaptive iscsi path adjustment under scenarios and application requirements, that is, it can automatically query all iscsi targets, automatically connect to legal iscsi targets, and automatically log out invalid and illegal iscsi sessions. Therefore, the present application effectively improves the multi-path management system. It greatly simplifies the configuration workload and improves management efficiency.
  • the iscsi multi-path management method provided by the embodiment of the present application is based on the above content, the black and white list rules are stored in the form of black list and/or white list, and the black list and white list are stored by the routing module 200 Generated according to input configuration directives; where,
  • the blacklist records the port IPs and network links that are not allowed to carry iscsi traffic; the whitelist records the port IPs and network links that are allowed to carry iscsi traffic.
  • the iscsi multipath management method provided by the embodiment of the present application is based on the above content, and the generation process of the routing table includes:
  • the black and white list rules determine the port IP and network link allowed to carry iscsi traffic in the storage end, so as to form the first IP set and the first link set respectively;
  • a legal path with the client is configured for each port IP in the first IP set; the legal network topology is a network topology formed by the first link set and the second link set.
  • the iscsi multi-path management method provided by the embodiment of the present application is based on the above-mentioned content, and configures a legal path with the client for each port IP in the first IP set in the legal network topology, including:
  • a legal path to the client is configured for each port IP in the first IP set in the legal network topology.
  • the iscsi multipath management method provided by the embodiment of the present application is based on the above content, and the generation process of the routing table further includes:
  • the black and white list rules determine the network links allowed to carry iscsi traffic among other devices in the network to form the third link set; the legal network topology is composed of the first link set, the second link set and the third link set network topology.
  • the iscsi multi-path management method provided by the embodiment of the present application, on the basis of the above content, periodically re-checks the established session according to the updated black and white list rules, including:
  • the iscsi multi-path management method provided by the embodiment of the present application is based on the above content, after the iscsi sessions that are in an unavailable state or do not meet the updated black and white list rules are logged out ,Also includes:
  • the storage volume manager 102 is notified to perform an unmount operation.
  • an electronic device including:
  • the processor 302 is configured to execute the computer program to implement the steps of any of the above-mentioned iscsi multi-path management methods.
  • an embodiment of the present application also discloses a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and the computer program is used to implement any of the above when executed by a processor.
  • the steps of the iscsi multipath management method are also disclosed.

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Abstract

一种iscsi多路径管理系统、方法、电子设备及计算机可读存储介质，该系统包括部署于客户端的连接模块和路由模块；路由模块用于根据实时更新维护路由表，路由表记录有符合黑白名单规则的合法路径；连接模块包括连接器和存储卷管理器，连接器用于查找存储端上符合黑白名单规则的iscsi目标，通过合法路径建立iscsi会话，通知存储卷管理器执行挂载卷操作；并定时根据更新后的黑白名单规则对已建立的iscsi会话进行复校验，并定时更新获取存储端上的iscsi目标，以便与新获取到的符合更新后的黑白名单规则的iscsi目标建立iscsi会话。本申请可提高多路径管理系统的适用性，并简化配置工作量和提高效率。

Description

一种iscsi多路径管理系统、方法、设备及存储介质
本申请要求于2020年07月28日提交中国专利局、申请号为CN202010738743.4、发明名称为“一种iscsi多路径管理系统、方法、设备及存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及存储技术领域，特别涉及一种iscsi多路径管理系统、方法、电子设备及计算机可读存储介质。
背景技术
iscsi(Internet Small Computer System Interface，因特网小型计算机系统接口)，是基于IP网络通信和SCSI存储接口的技术标准，将SCSI指令通过IP协议承载传输，实现存储设备的跨网络访问。iscsi技术可直接利用现有的网络拓扑，节省成本，便于使用，因此广泛应用在存储领域。
在存储系统组网时，客户端的主机和存储端之间的物理或者逻辑链路往往不只一条，因此主机可以通过多条链路连接到存储端的同一设备。多路径技术可在主机端将多条链路下的同一设备进行聚合管理，提高传输速率，并提供负载均衡、故障切换等特性。所谓多路径技术，即将主机与存储设备之间同时通过多条路径连接和聚合的技术。
当前相关技术中的存储系统的多路径管理系统，一般在配置完成后其路径是固定不变的。然而，实际应用中不乏这样的应用场景：客户端与存储端之间的链路是不确定的，可能随网络拓扑的扩展而增加；链路上负载流量的类型也是不确定的，可以是用于承载iscsi流量，也有可能是需要用于承载对外业务流量。如此，相关技术中便需要反复更改调整管理系统中的相关配置，效率低下。
鉴于此，提供一种解决上述技术问题的方案，已经是本领域技术人员所亟需关注的。
发明内容
本申请的目的在于提供一种iscsi多路径管理系统、方法、电子设备及计算机可读存储介质，以便根据应用场景的需要和变化而有效地实现自适应调整，提高多路径管理系统的适用性，并简化配置工作量和提高效率。
为解决上述技术问题，第一方面，本申请公开了一种iscsi多路径管理系统，包括部署于客户端的连接模块和路由模块；
所述路由模块用于根据当前的网络拓扑结构实时更新维护路由表，所述路由表记录有存储端与所述客户端之间的、符合黑白名单规则的合法路径；
所述连接模块包括连接器和存储卷管理器，所述连接器用于查找所述存储端上符合所述黑白名单规则的各个iscsi目标，以便通过所述合法路径建立iscsi会话，通知所述存储卷管理器执行挂载卷操作；并定时根据更新后的黑白名单规则对已建立的iscsi会话进行复校验，并定时更新获取所述存储端上的iscsi目标，以便与新获取到的符合更新后的黑白名单规则的iscsi目标建立iscsi会话。
可选地，所述黑白名单规则以黑名单和/或白名单的形式存储，所述黑名单和所述白名单由所述路由模块根据输入的配置指令而生成；其中，
所述黑名单记录有不被允许承载iscsi流量的端口IP和网络链路；所述白名单记录有被允许承载iscsi流量的端口IP和网络链路。
可选地，所述路由模块包括：
第一初始化单元，用于根据所述黑白名单规则，确定所述存储端中允许承载iscsi流量的端口IP和网络链路，以分别构成第一IP集和第一链路集；
第二初始化单元，用于根据所述黑白名单规则，确定所述客户端中允许承载iscsi流量的网络链路以构成第二链路集；
更新调整单元，用于定时获取并根据更新后的所述黑白名单规则，对所述第一IP集、所述第一链路集、所述第二链路集分别进行更新；
路径生成单元，用于在合法网络拓扑中为所述第一IP集中的每个端口IP配置与所述客户端的合法路径；所述合法网络拓扑为由所述第一链路集 和所述第二链路集构成的网络拓扑。
可选地，所述路径生成单元具体用于：
根据负载均衡原则，在合法网络拓扑中为所述第一IP集中的每个端口IP配置与所述客户端的合法路径。
可选地，所述路由模块还包括：
第三初始化单元，用于根据所述黑白名单规则，确定网络中其他设备间允许承载iscsi流量的网络链路以构成第三链路集；
所述合法网络拓扑为由所述第一链路集、所述第二链路集和所述第三链路集构成的网络拓扑。
可选地，所述连接器在定时根据更新后的黑白名单规则对已建立的会话进行复校验时，具体用于：
定时获取更新后的黑白名单规则，针对当前已建立的各个iscsi会话，将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销。
可选地，所述连接器还用于：
在将其中处于不可用状态或者不符合更新后的黑白名单规则的会话均进行注销之后，若不存在剩余的有效iscsi会话，则通知所述存储卷管理器执行卸载卷操作。
第二方面，本申请还公开了一种iscsi多路径管理方法，应用于客户端，所述客户端中存储有根据当前的网络拓扑结构而实时更新维护的路由表，所述路由表记录有存储端与客户端间的、符合黑白名单规则的合法路径；所述方法包括：
查找所述存储端上符合所述黑白名单规则的各个iscsi目标；
通过所述合法路径，与符合所述黑白名单规则的iscsi目标建立iscsi会话，并执行对应的挂载卷操作；
定时根据更新后的黑白名单规则对已建立的会话进行复校验；
定时更新获取所述存储端上的iscsi目标，以便与新获取到的符合更新后的黑白名单规则的iscsi目标建立iscsi会话。
可选地，所述黑白名单规则以黑名单和/或白名单的形式存储，所述黑 名单和所述白名单根据输入的配置指令而生成；其中，
所述黑名单记录有不被允许承载iscsi流量的端口IP和网络链路；所述白名单记录有被允许承载iscsi流量的端口IP和网络链路。
可选地，所述路由表的生成过程包括：
根据所述黑白名单规则，确定所述存储端中允许承载iscsi流量的端口IP和网络链路，以分别构成第一IP集和第一链路集；
根据所述黑白名单规则，确定所述客户端中允许承载iscsi流量的网络链路以构成第二链路集；
定时获取并根据更新后的所述黑白名单规则，对所述第一IP集、所述第一链路集、所述第二链路集分别进行更新；
在合法网络拓扑中为所述第一IP集中的每个端口IP配置与所述客户端的合法路径；所述合法网络拓扑为由所述第一链路集和所述第二链路集构成的网络拓扑。
可选地，所述在合法网络拓扑中为所述第一IP集中的每个端口IP配置与所述客户端的合法路径，包括：
根据负载均衡原则，在合法网络拓扑中为所述第一IP集中的每个端口IP配置与所述客户端的合法路径。
可选地，所述路由表的生成过程还包括：
根据所述黑白名单规则，确定网络中其他设备间允许承载iscsi流量的网络链路以构成第三链路集；所述合法网络拓扑为由所述第一链路集、所述第二链路集和所述第三链路集构成的网络拓扑。
可选地，所述定时根据更新后的黑白名单规则对已建立的会话进行复校验，包括：
定时获取更新后的黑白名单规则，针对当前已建立的各个iscsi会话，将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销。
可选地，在所述在将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销之后，还包括：
判断是否存在剩余的有效iscsi会话；
若否，则通知所述存储卷管理器执行卸载卷操作。
第三方面，本申请还公开了一种电子设备，包括：
存储器，用于存储计算机程序；
处理器，用于执行所述计算机程序以实现如上所述的任一种iscsi多路径管理方法的步骤。
第四方面，本申请还公开了一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机程序，所述计算机程序被处理器执行时用以实现如上所述的任一种iscsi多路径管理方法的步骤。
本申请所提供的iscsi多路径管理系统、方法、电子设备及计算机可读存储介质所具有的有益效果是：利用路由模块实时更新设定允许承载iscsi流量的合法路径，以便连接模块根据相应的合法路径为对应的iscsi目标创建iscsi会话，并定时更新黑白名单规则与存储端的iscsi目标，从而可实现在多种应用场景和应用需求下的自适应iscsi路径调整，即，可自动查询所有iscsi目标，并自动连接合法的iscsi目标、以及自动注销无效非法的iscsi会话，因此，本申请有效地提高了多路径管理系统的适用性，并极大地简化了配置工作量、提高管理效率。
附图说明
为了更清楚地说明现有技术和本申请实施例中的技术方案，下面将对现有技术和本申请实施例描述中需要使用的附图作简要的介绍。当然，下面有关本申请实施例的附图描述的仅仅是本申请中的一部分实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图，所获得的其他附图也属于本申请的保护范围。
图1为本申请实施例公开的一种iscsi多路径管理系统的结构框图；
图2为本申请实施例公开的一种iscsi多路径管理方法的流程图；
图3为本申请实施例公开的一种电子设备的结构框图。
具体实施方式
本申请的核心在于提供一种iscsi多路径管理系统、方法、电子设备及 计算机可读存储介质，以便根据应用场景的需要和变化而有效地实现自适应调整，提高多路径管理系统的适用性，并简化配置工作量和提高效率。
为了对本申请实施例中的技术方案进行更加清楚、完整地描述，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行介绍。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
iscsi(Internet Small Computer System Interface，因特网小型计算机系统接口)，是基于IP网络通信和SCSI存储接口的技术标准，将SCSI指令通过IP协议承载传输，实现存储设备的跨网络访问。iscsi技术可直接利用现有的网络拓扑，节省成本，便于使用，因此广泛应用在存储领域。
在存储系统组网时，客户端的主机和存储端之间的物理或者逻辑链路往往不只一条，因此主机可以通过多条链路连接到存储端的同一设备。多路径技术可在主机端将多条链路下的同一设备进行聚合管理，提高传输速率，并提供负载均衡、故障切换等特性。所谓多路径技术，即将主机与存储设备之间同时通过多条路径连接和聚合的技术。
当前相关技术中的存储系统的多路径管理系统，一般在配置完成后其路径是固定不变的。然而，实际应用中不乏这样的应用场景：客户端与存储端之间的链路是不确定的，可能随网络拓扑的扩展而增加；链路上负载流量的类型也是不确定的，可以是用于承载iscsi流量，也有可能是需要用于承载对外业务流量。如此，相关技术中便需要反复更改调整管理系统中的相关配置，效率低下。
鉴于此，本申请提供了一套iscsi多路径管理方案，可有效解决上述问题。
参见图1所示，本申请实施例公开了一种iscsi多路径管理系统，主要包括部署于客户端的连接模块100和路由模块200；
路由模块200用于根据当前的网络拓扑结构实时更新维护路由表，路由表记录有存储端与客户端之间的、符合黑白名单规则的合法路径；
连接模块100包括连接器101和存储卷管理器102，连接器101用于 查找存储端上符合黑白名单规则的各个iscsi目标，以便通过合法路径建立iscsi会话，通知存储卷管理器102执行挂载卷操作；并定时根据更新后的黑白名单规则对已建立的会话进行复校验，并定时更新获取存储端上的iscsi目标，以便与新获取到的符合更新后的黑白名单规则的iscsi目标建立iscsi会话。
具体地，需要指出的是，本申请所提供的多路径管理系统中，连接模块100用于进行客户端与存储端之间的自适应连接，即建立对应的iscsi会话，管理合法连接并限制非法连接；路由模块200用于在人工规划下配置路由合法路径，并自动调整网络拓扑中的连接路径。
其中，路由模块200具体依据黑白名单规则进行合法路径的配置。需要说明的是，合法路径是指被黑白名单规则允许承载iscsi流量即允许执行iscsi业务的路径。黑白名单规则可具体由管理员进行管理设定。
连接模块100中，连接器101可具体为在客户端的主机上自启动的服务。在启动后，连接器101可在依赖服务启动就绪后访问存储端，查询存储端上的各个iscsi目标，判断每个iscsi目标是否符合黑白名单规则，若是，则可连接该iscsi目标的端口IP，建立对应的iscsi会话，并通知存储卷管理器102针对与该iscsi会话对应的卷执行挂载卷操作。
需要强调的是，本申请所提供的方案，可适用于用户需求不断变化的场景。由此，本申请中，连接器101在初步完成客户端与存储端之间的iscsi会话建立后，将不断地定时获取更新后的黑白名单规则，并对已经建立的iscsi会话进行复校验。所谓复校验，即重复校验该iscsi会话是否符合更新后的黑白名单规则。
如果iscsi会话符合更新后的黑白名单规则，则可以继续维持会话；否则，便注销该iscsi会话。
此外，本申请所提供的方案，还同样适用于网络拓扑结构不断变化的场景。由此，本申请中，连机器在初步完成客户端与存储端之间的iscsi会话建立后，还会不断地定时更新获取存储端上的iscsi目标，并判断是否增加了一些同样符合黑白名单规则的新iscsi目标，以便同样建立iscsi会话。
可见，本申请实施例所公开的iscsi多路径管理系统，利用路由模块200 实时更新设定允许承载iscsi流量的合法路径，以便连接模块100根据相应的合法路径为对应的iscsi目标创建iscsi会话，并定时更新黑白名单规则与存储端的iscsi目标，从而可实现在多种应用场景和应用需求下的自适应iscsi路径调整，即，可自动查询所有iscsi目标，并自动连接合法的iscsi目标、以及自动注销无效非法的iscsi会话，因此，本申请有效地提高了多路径管理系统的适用性，并极大地简化了配置工作量、提高管理效率。
作为一种具体实施例，本申请实施例所公开的iscsi多路径管理系统在上述内容的基础上，黑白名单规则以黑名单和/或白名单的形式存储，黑名单和白名单由路由模块200根据输入的配置指令而生成；其中，
黑名单记录有不被允许承载iscsi流量的端口IP和网络链路；白名单记录有被允许承载iscsi流量的端口IP和网络链路。
具体地，本实施例中，黑名单或者白名单中记载有各对象的端口IP和网络链路。由此，当某个iscsi目标的端口IP出现在黑名单中时，则该iscsi目标将被视为iscsi路径管理中的非法路径；而当某个iscsi目标的端口IP出现在白名单中，则该iscsi目标将被视为iscsi路径管理中的合法路径。
作为一种具体实施例，本申请实施例所公开的iscsi多路径管理系统在上述内容的基础上，路由模块200包括：
第一初始化单元，用于根据黑白名单规则，确定存储端中允许承载iscsi流量的端口IP和网络链路，以分别构成第一IP集和第一链路集；
第二初始化单元，用于根据黑白名单规则，确定客户端中允许承载iscsi流量的网络链路以构成第二链路集；
更新调整单元，用于定时获取并根据更新后的黑白名单规则，对第一IP集、第一链路集、第二链路集分别进行更新；
路径生成单元，用于在合法网络拓扑中为第一IP集中的每个端口IP配置与客户端的合法路径；合法网络拓扑为由第一链路集和第二链路集构成的网络拓扑。
具体地，在存储端中提供iscsi业务的第一IP集为I＝{ip1，ip2，……，ipN}，第一链路集为L1＝{link1，link2，……，linkM}；在客户端，被允许 提供iscsi业务的第二链路集为L2＝{l1，l2，……，lS}。
第一链路集为L1与第二链路集为L2构成了合法网络拓扑T，在该合法网络拓扑T中，每组<linka，lb>间均包括多条合法路径。其中，linka和lb分别为第一链路集L1和第二链路集L2中的元素。由此，路由模块200可进一步在合法网络拓扑T中，为第一IP集I中的每一个端口IP均规划出与客户端的合法路径，配置出路由表。
作为一种具体实施例，本申请实施例所公开的iscsi多路径管理系统在上述内容的基础上，路径生成单元具体用于：
根据负载均衡原则，在合法网络拓扑中为第一IP集中的每个端口IP配置与客户端的合法路径。
具体地，在本实施例中，路由模块200在配置路由表时具体是依据负载均衡原则择优选择相关链路的。
作为一种具体实施例，本申请实施例所公开的iscsi多路径管理系统在上述内容的基础上，路由模块200还包括：
第三初始化单元，用于根据黑白名单规则，确定网络中其他设备间允许承载iscsi流量的网络链路以构成第三链路集；
合法网络拓扑为由第一链路集、第二链路集和第三链路集构成的网络拓扑。
具体地，本实施例还考虑到了，存储系统中除却存储端和客户端以外还会有其他设备，由其他设备构建的相关网络链路，若被允许承载iscsi流量，则同样可以构成合法网络拓扑T。
作为一种具体实施例，本申请实施例所公开的iscsi多路径管理系统在上述内容的基础上，连接器101在定时根据更新后的黑白名单规则对已建立的会话进行复校验时，具体用于：
定时获取更新后的黑白名单规则，针对当前已建立的各个iscsi会话，将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销。
作为一种具体实施例，本申请实施例所公开的iscsi多路径管理系统在上述内容的基础上，连接器101还用于：
在将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销之后，若不存在剩余的有效iscsi会话，则通知存储卷管理器102执行卸载卷操作。
所谓有效iscsi会话，即为处于可用状态、且符合更新后的黑白名单规则而被保留的iscsi会话。
其中，存储卷管理器102在执行挂载卷操作时，可具体获取对应存储卷的UUID(Universally Unique Identifier，通用唯一识别码)，通过访问多路径驱动来查询是否存在有与该UUID对应的多路径设备，若存在，则挂载该多路径设备；否则，返回对应提示信息。
存储卷管理器102在执行卸载卷操作时，可具体获取对应存储卷的UUID，通过访问多路径驱动来确定与该UUID对应的多路径设备，查询该多路径设备对应的各iscsi会话中的iscsi设备，对这些查询到的iscsi设备执行删除操作，然后对该多路径设备执行删除操作。
参见图2所示，本申请实施例公开了一种iscsi多路径管理方法，应用于客户端，客户端中存储有根据当前的网络拓扑结构而实时更新维护的路由表，路由表记录有存储端与客户端间的、符合黑白名单规则的合法路径；方法包括：
S201：查找存储端上符合黑白名单规则的各个iscsi目标。
S202：通过合法路径，与符合黑白名单规则的iscsi目标建立iscsi会话，并执行对应的挂载卷操作。
S203：定时根据更新后的黑白名单规则对已建立的会话进行复校验。
S204：定时更新获取存储端上的iscsi目标，以便与新获取到的符合更新后的黑白名单规则的iscsi目标建立iscsi会话。
可见，本申请实时更新设定允许承载iscsi流量的合法路径，以便根据相应的合法路径为对应的iscsi目标创建iscsi会话，并定时更新黑白名单规则与存储端的iscsi目标，从而可实现在多种应用场景和应用需求下的自适应iscsi路径调整，即，可自动查询所有iscsi目标，并自动连接合法的iscsi目标、以及自动注销无效非法的iscsi会话，因此，本申请有效地提高了多 路径管理系统的适用性，并极大地简化了配置工作量、提高管理效率。
关于上述iscsi多路径管理方法的具体内容，可参考前述关于iscsi多路径管理方法的详细介绍，这里就不再赘述。
作为一种具体实施例，本申请实施例所提供的iscsi多路径管理方法在上述内容的基础上，黑白名单规则以黑名单和/或白名单的形式存储，黑名单和白名单由路由模块200根据输入的配置指令而生成；其中，
黑名单记录有不被允许承载iscsi流量的端口IP和网络链路；白名单记录有被允许承载iscsi流量的端口IP和网络链路。
作为一种具体实施例，本申请实施例所提供的iscsi多路径管理方法在上述内容的基础上，路由表的生成过程包括：
根据黑白名单规则，确定存储端中允许承载iscsi流量的端口IP和网络链路，以分别构成第一IP集和第一链路集；
根据黑白名单规则，确定客户端中允许承载iscsi流量的网络链路以构成第二链路集；
定时获取并根据更新后的黑白名单规则，对第一IP集、第一链路集、第二链路集分别进行更新；
在合法网络拓扑中为第一IP集中的每个端口IP配置与客户端的合法路径；合法网络拓扑为由第一链路集和第二链路集构成的网络拓扑。
作为一种具体实施例，本申请实施例所提供的iscsi多路径管理方法在上述内容的基础上，在合法网络拓扑中为第一IP集中的每个端口IP配置与客户端的合法路径，包括：
根据负载均衡原则，在合法网络拓扑中为第一IP集中的每个端口IP配置与客户端的合法路径。
作为一种具体实施例，本申请实施例所提供的iscsi多路径管理方法在上述内容的基础上，路由表的生成过程还包括：
根据黑白名单规则，确定网络中其他设备间允许承载iscsi流量的网络链路以构成第三链路集；合法网络拓扑为由第一链路集、第二链路集和第三链路集构成的网络拓扑。
作为一种具体实施例，本申请实施例所提供的iscsi多路径管理方法在上述内容的基础上，定时根据更新后的黑白名单规则对已建立的会话进行复校验，包括：
定时获取更新后的黑白名单规则，针对当前已建立的各个iscsi会话，将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销。
作为一种具体实施例，本申请实施例所提供的iscsi多路径管理方法在上述内容的基础上，在在将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销之后，还包括：
判断是否存在剩余的有效iscsi会话；
若否，则通知存储卷管理器102执行卸载卷操作。
参见图3所示，本申请实施例公开了一种电子设备，包括：
存储器301，用于存储计算机程序；
处理器302，用于执行所述计算机程序以实现如上所述的任一种iscsi多路径管理方法的步骤。
进一步地，本申请实施例还公开了一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机程序，所述计算机程序被处理器执行时用以实现如上所述的任一种iscsi多路径管理方法的步骤。
关于上述电子设备和计算机可读存储介质的具体内容，可参考前述关于iscsi多路径管理系统的详细介绍，这里就不再赘述。
本申请中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的方法而言，由于其与实施例公开的系统相对应，所以描述的比较简单，相关之处参见系统部分说明即可。
还需说明的是，在本申请文件中，诸如“第一”和“第二”之类的关系术语，仅仅用来将一个实体或者操作与另一个实体或者操作区分开来，而不一定要求或者暗示这些实体或者操作之间存在任何这种实际的关系或 者顺序。此外，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上对本申请所提供的技术方案进行了详细介绍。本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以对本申请进行若干改进和修饰，这些改进和修饰也落入本申请的保护范围内。

Claims (10)

  1. 一种iscsi多路径管理系统，其特征在于，包括部署于客户端的连接模块和路由模块；
    所述路由模块用于根据当前的网络拓扑结构实时更新维护路由表，所述路由表记录有存储端与所述客户端之间的、符合黑白名单规则的合法路径；
    所述连接模块包括连接器和存储卷管理器，所述连接器用于查找所述存储端上符合所述黑白名单规则的各个iscsi目标，以便通过所述合法路径建立iscsi会话，通知所述存储卷管理器执行挂载卷操作；并定时根据更新后的黑白名单规则对已建立的iscsi会话进行复校验，并定时更新获取所述存储端上的iscsi目标，以便与新获取到的符合更新后的黑白名单规则的iscsi目标建立iscsi会话。
  2. 根据权利要求1所述的系统，其特征在于，所述黑白名单规则以黑名单和/或白名单的形式存储，所述黑名单和所述白名单由所述路由模块根据输入的配置指令而生成；其中，
    所述黑名单记录有不被允许承载iscsi流量的端口IP和网络链路；所述白名单记录有被允许承载iscsi流量的端口IP和网络链路。
  3. 根据权利要求1所述的系统，其特征在于，所述路由模块包括：
    第一初始化单元，用于根据所述黑白名单规则，确定所述存储端中允许承载iscsi流量的端口IP和网络链路，以分别构成第一IP集和第一链路集；
    第二初始化单元，用于根据所述黑白名单规则，确定所述客户端中允许承载iscsi流量的网络链路以构成第二链路集；
    更新调整单元，用于定时获取并根据更新后的所述黑白名单规则，对所述第一IP集、所述第一链路集、所述第二链路集分别进行更新；
    路径生成单元，用于在合法网络拓扑中为所述第一IP集中的每个端口IP配置与所述客户端的合法路径；所述合法网络拓扑为由所述第一链路集和所述第二链路集构成的网络拓扑。
  4. 根据权利要求3所述的系统，其特征在于，所述路径生成单元具体 用于：
    根据负载均衡原则，在合法网络拓扑中为所述第一IP集中的每个端口IP配置与所述客户端的合法路径。
  5. 根据权利要求3所述的系统，其特征在于，所述路由模块还包括：
    第三初始化单元，用于根据所述黑白名单规则，确定网络中其他设备间允许承载iscsi流量的网络链路以构成第三链路集；
    所述合法网络拓扑为由所述第一链路集、所述第二链路集和所述第三链路集构成的网络拓扑。
  6. 根据权利要求1至5任一项所述的系统，其特征在于，所述连接器在定时根据更新后的黑白名单规则对已建立的会话进行复校验时，具体用于：
    定时获取更新后的黑白名单规则，针对当前已建立的各个iscsi会话，将其中处于不可用状态或者不符合更新后的黑白名单规则的会话均进行注销。
  7. 根据权利要求6所述的系统，其特征在于，所述连接器还用于：
    在将其中处于不可用状态或者不符合更新后的黑白名单规则的iscsi会话均进行注销之后，若不存在剩余的有效iscsi会话，则通知所述存储卷管理器执行卸载卷操作。
  8. 一种iscsi多路径管理方法，其特征在于，应用于客户端，所述客户端中存储有根据当前的网络拓扑结构而实时更新维护的路由表，所述路由表记录有存储端与客户端间的、符合黑白名单规则的合法路径；所述方法包括：
    查找所述存储端上符合所述黑白名单规则的各个iscsi目标；
    通过所述合法路径，与符合所述黑白名单规则的iscsi目标建立iscsi会话，并执行对应的挂载卷操作；
    定时根据更新后的黑白名单规则对已建立的会话进行复校验；
    定时更新获取所述存储端上的iscsi目标，以便与新获取到的符合更新后的黑白名单规则的iscsi目标建立iscsi会话。
  9. 一种电子设备，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于执行所述计算机程序以实现如权利要求8所述方法的步骤。
  10. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，所述计算机程序被处理器执行时用以实现如权利要求8所述方法的步骤。
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