安装光纤连接的 MetroCluster
简体中文版经机器翻译而成，仅供参考。如与英语版出现任何冲突，应以英语版为准。
将 Linux iSCSI 主机从 MetroCluster FC 移动到 MetroCluster IP 节点
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将 MetroCluster 节点从 FC 过渡到 IP 后，您可能需要将 iSCSI 主机连接移动到新节点。
关于此任务
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IPv4接口是在设置新的iSCSI连接时创建的。
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主机命令和示例特定于Linux操作系统。
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MetroCluster FC节点称为旧节点、MetroCluster IP节点称为新节点。
第1步：设置新的iSCSI连接
要移动iSCSI连接、请设置与新节点的新iSCSI连接。
步骤
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在新节点上创建iSCSI接口、并检查从iSCSI主机到新节点上新接口的ping连接。
iSCSI主机应可访问SVM中的所有iSCSI接口。
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在iSCSI主机上、确定从主机到旧节点的现有iSCSI连接：
iscsiadm -m session[root@scspr1789621001 ~]# iscsiadm -m session tcp: [1] 10.230.68.236:3260,1156 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 (non-flash) tcp: [2] 10.230.68.237:3260,1158 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 (non-flash)
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在新节点上、验证与新节点的连接：
iscsi session show -vserver <svm-name>node_A_1-new::*> iscsi session show -vserver vsa_1 Tpgroup Initiator Initiator Vserver Name TSIH Name ISID Alias --------- ------- ---- ------------------------ --------- --------------------- vsa_1 iscsi_lf__n1_p1_ 4 iqn.2020-01.com.netapp.englab.gdl:scspr1789621001 00:02:3d:00:00:01 scspr1789621001.gdl.englab.netapp.com vsa_1 iscsi_lf__n2_p1_ 4 iqn.2020-01.com.netapp.englab.gdl:scspr1789621001 00:02:3d:00:00:02 scspr1789621001.gdl.englab.netapp.com 2 entries were displayed.
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在新节点上、在ONTAP中列出包含这些接口的SVM的iSCSI接口：
iscsi interface show -vserver <svm-name>sti8200mcchtp001htp_siteA::*> iscsi interface show -vserver vsa_1 Logical Status Curr Curr Vserver Interface TPGT Admin/Oper IP Address Node Port Enabled ------- ---------- ---- ---------- --------------- ----------- ---- ------- vsa_1 iscsi_lf__n1_p1_ 1156 up/up 10.230.68.236 sti8200mcc-htp-001 e0g true vsa_1 iscsi_lf__n1_p2_ 1157 up/up fd20:8b1e:b255:805e::78c9 sti8200mcc-htp-001 e0h true vsa_1 iscsi_lf__n2_p1_ 1158 up/up 10.230.68.237 sti8200mcc-htp-002 e0g true vsa_1 iscsi_lf__n2_p2_ 1159 up/up fd20:8b1e:b255:805e::78ca sti8200mcc-htp-002 e0h true vsa_1 iscsi_lf__n3_p1_ 1183 up/up 10.226.43.134 sti8200mccip-htp-005 e0c true vsa_1 iscsi_lf__n4_p1_ 1188 up/up 10.226.43.142 sti8200mccip-htp-006 e0c true 6 entries were displayed.
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在iSCSI主机上、对SVM上的任一iSCSI IP地址运行发现以发现新目标：
iscsiadm -m discovery -t sendtargets -p iscsi-ip-address发现可以在 SVM 的任何 IP 地址上运行，包括非 iSCSI 接口。
[root@scspr1789621001 ~]# iscsiadm -m discovery -t sendtargets -p 10.230.68.236:3260 10.230.68.236:3260,1156 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 10.226.43.142:3260,1188 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 10.226.43.134:3260,1183 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 10.230.68.237:3260,1158 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6
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在iSCSI主机上、登录到所有已发现的地址：
iscsiadm -m node -L all -T node-address -p portal-address -l[root@scspr1789621001 ~]# iscsiadm -m node -L all -T iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 -p 10.230.68.236:3260 -l Logging in to [iface: default, target: iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6, portal: 10.226.43.142,3260] (multiple) Logging in to [iface: default, target: iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6, portal: 10.226.43.134,3260] (multiple) Login to [iface: default, target: iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6, portal: 10.226.43.142,3260] successful. Login to [iface: default, target: iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6, portal: 10.226.43.134,3260] successful.
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在iSCSI主机上、验证登录和连接：
iscsiadm -m session[root@scspr1789621001 ~]# iscsiadm -m session tcp: [1] 10.230.68.236:3260,1156 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 (non-flash) tcp: [2] 10.230.68.237:3260,1158 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 (non-flash) tcp: [3] 10.226.43.142:3260,1188 iqn.1992-08.com.netapp:sn.58d7f6df2cc611eaa9c500a098a71638:vs.6 (non-flash)
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在新节点上、验证与主机的登录和连接：
iscsi initiator show -vserver <svm-name>sti8200mcchtp001htp_siteA::*> iscsi initiator show -vserver vsa_1 Tpgroup Initiator Vserver Name TSIH Name ISID Igroup Name ------- -------- ---- --------------------- ----------------- ----------------- vsa_1 iscsi_lf__n1_p1_ 4 iqn.2020-01.com.netapp.englab.gdl:scspr1789621001 00:02:3d:00:00:01 igroup_linux vsa_1 iscsi_lf__n2_p1_ 4 iqn.2020-01.com.netapp.englab.gdl:scspr1789621001 00:02:3d:00:00:02 igroup_linux vsa_1 iscsi_lf__n3_p1_ 1 iqn.2020-01.com.netapp.englab.gdl:scspr1789621001 00:02:3d:00:00:04 igroup_linux vsa_1 iscsi_lf__n4_p1_ 1 iqn.2020-01.com.netapp.englab.gdl:scspr1789621001 00:02:3d:00:00:03 igroup_linux 4 entries were displayed.
结果
在此任务结束时、主机可以看到所有iSCSI接口(位于新旧节点上)、并登录到所有这些接口。
LUN和卷仍以物理方式托管在旧节点上。由于LUN仅在旧节点接口上报告、因此主机将仅显示旧节点上的路径。要查看此信息、请运行 sanlun lun show -p 和 multipath -ll -d 命令并检查命令输出。
[root@scspr1789621001 ~]# sanlun lun show -p ONTAP Path: vsa_1:/vol/vsa_1_vol6/lun_linux_12 LUN: 4 LUN Size: 2g Product: cDOT Host Device: 3600a098038304646513f4f674e52774b Multipath Policy: service-time 0 Multipath Provider: Native --------- ---------- ------- ------------ ------------------- host vserver path path /dev/ host vserver state type node adapter LIF --------- ---------- ------- ------------ ------------------- up primary sdk host3 iscsi_lf__n2_p1_ up secondary sdh host2 iscsi_lf__n1_p1_ [root@scspr1789621001 ~]# multipath -ll -d 3600a098038304646513f4f674e52774b dm-5 NETAPP ,LUN C-Mode size=2.0G features='4 queue_if_no_path pg_init_retries 50 retain_attached_hw_handle' hwhandler='1 alua' wp=rw |-+- policy='service-time 0' prio=50 status=active | `- 3:0:0:4 sdk 8:160 active ready running `-+- policy='service-time 0' prio=10 status=enabled `- 2:0:0:4 sdh 8:112 active ready running
第2步：将新节点添加为报告节点
设置与新节点的连接后、您可以将新节点添加为报告节点。
步骤
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在新节点上、列出SVM上LUN的报告节点：
lun mapping show -vserver <svm-name> -fields reporting-nodes -ostype linux以下报告节点是本地节点、因为LUN实际位于旧节点NODE_A_1-Oold和NODE_A_2-Oold上。
node_A_1-new::*> lun mapping show -vserver vsa_1 -fields reporting-nodes -ostype linux vserver path igroup reporting-nodes ------- ---------------------------- ------------ --------------------------- vsa_1 /vol/vsa_1_vol1/lun_linux_2 igroup_linux node_A_1-old,node_A_2-old . . . vsa_1 /vol/vsa_1_vol9/lun_linux_19 igroup_linux node_A_1-old,node_A_2-old 12 entries were displayed.
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在新节点上、添加报告节点：
lun mapping add-reporting-nodes -vserver <svm-name> -path /vol/vsa_1_vol*/lun_linux_* -nodes node1,node2 -igroup <igroup_name>node_A_1-new::*> lun mapping add-reporting-nodes -vserver vsa_1 -path /vol/vsa_1_vol*/lun_linux_* -nodes node_A_1-new,node_A_2-new -igroup igroup_linux 12 entries were acted on.
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在新节点上、验证新添加的节点是否存在：
lun mapping show -vserver <svm-name> -fields reporting-nodes -ostype linux vserver path igroup reporting-nodesnode_A_1-new::*> lun mapping show -vserver vsa_1 -fields reporting-nodes -ostype linux vserver path igroup reporting-nodes ------- --------------------------- ------------ ------------------------------------------------------------------------------- vsa_1 /vol/vsa_1_vol1/lun_linux_2 igroup_linux node_A_1-old,node_A_2-old,node_A_1-new,node_A_2-new vsa_1 /vol/vsa_1_vol1/lun_linux_3 igroup_linux node_A_1-old,node_A_2-old,node_A_1-new,node_A_2-new . . . 12 entries were displayed.
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。
sg3-utils软件包必须安装在Linux主机上。这样可防止出现rescan-scsi-bus.sh utility not found使用重新扫描Linux主机以查找新映射的LUN时出错rescan-scsi-bus命令：在主机上、验证是否已启用
sg3-utils软件包已安装：-
对于基于Debian的发行版：
dpkg -l | grep sg3-utils -
对于基于Red Hat的分发版：
rpm -qa | grep sg3-utils
如果需要、请安装
sg3-utilsLinux主机上的软件包：sudo apt-get install sg3-utils -
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在主机上、重新扫描主机上的SCSI总线并发现新添加的路径：
/usr/bin/rescan-scsi-bus.sh -a[root@stemgr]# /usr/bin/rescan-scsi-bus.sh -a Scanning SCSI subsystem for new devices Scanning host 0 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs Scanning host 1 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs Scanning host 2 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs Scanning for device 2 0 0 0 ... . . . OLD: Host: scsi5 Channel: 00 Id: 00 Lun: 09 Vendor: NETAPP Model: LUN C-Mode Rev: 9800 Type: Direct-Access ANSI SCSI revision: 05 0 new or changed device(s) found. 0 remapped or resized device(s) found. 0 device(s) removed.
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在iSCSI主机上、列出新添加的路径：
sanlun lun show -p每个 LUN 显示四个路径。
[root@stemgr]# sanlun lun show -p ONTAP Path: vsa_1:/vol/vsa_1_vol6/lun_linux_12 LUN: 4 LUN Size: 2g Product: cDOT Host Device: 3600a098038304646513f4f674e52774b Multipath Policy: service-time 0 Multipath Provider: Native ------- ---------- ------- ----------- --------------------- host vserver path path /dev/ host vserver state type node adapter LIF ------ ---------- ------- ----------- --------------------- up primary sdk host3 iscsi_lf__n2_p1_ up secondary sdh host2 iscsi_lf__n1_p1_ up secondary sdag host4 iscsi_lf__n4_p1_ up secondary sdah host5 iscsi_lf__n3_p1_
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在新节点上、将包含LUN的卷从旧节点移动到新节点。
node_A_1-new::*> vol move start -vserver vsa_1 -volume vsa_1_vol1 -destination-aggregate sti8200mccip_htp_005_aggr1 [Job 1877] Job is queued: Move "vsa_1_vol1" in Vserver "vsa_1" to aggregate "sti8200mccip_htp_005_aggr1". Use the "volume move show -vserver vsa_1 -volume vsa_1_vol1" command to view the status of this operation. node_A_1-new::*> vol move show Vserver Volume State Move Phase Percent-Complete Time-To-Complete -------- ---------- -------- ---------- ---------------- ---------------- ---------------- vsa_1 vsa_1_vol1 healthy initializing - -
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卷移至新节点后、验证卷是否已联机：
volume show -state -
LUN现在所在的新节点上的iSCSI接口将更新为主路径。如果卷移动后主路径未更新、请运行
/usr/bin/rescan-scsi-bus.sh -a和multipath -v3或只是等待多路径重新扫描发生。在以下示例中、主路径是新节点上的LIF。
[root@stemgr]# sanlun lun show -p ONTAP Path: vsa_1:/vol/vsa_1_vol6/lun_linux_12 LUN: 4 LUN Size: 2g Product: cDOT Host Device: 3600a098038304646513f4f674e52774b Multipath Policy: service-time 0 Multipath Provider: Native --------- ---------- ------- ------------ ----------------------- host vserver path path /dev/ host vserver state type node adapter LIF --------- ---------- ------- ------------ ------------------------ up primary sdag host4 iscsi_lf__n4_p1_ up secondary sdk host3 iscsi_lf__n2_p1_ up secondary sdh host2 iscsi_lf__n1_p1_ up secondary sdah host5 iscsi_lf__n3_p1_
第3步：删除报告节点并重新扫描路径
您必须删除报告节点并重新扫描路径。
步骤
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在新节点上、删除Linux LUN的远程报告节点(新节点)：
lun mapping remove-reporting-nodes -vserver <svm-name> -path * -igroup <igroup_name> -remote-nodes true在这种情况下、远程节点是旧节点。
node_A_1-new::*> lun mapping remove-reporting-nodes -vserver vsa_1 -path * -igroup igroup_linux -remote-nodes true 12 entries were acted on.
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在新节点上、检查报告节点中的LUN：
lun mapping show -vserver <svm-name> -fields reporting-nodes -ostype linuxnode_A_1-new::*> lun mapping show -vserver vsa_1 -fields reporting-nodes -ostype linux vserver path igroup reporting-nodes ------- --------------------------- ------------ ------------------------- vsa_1 /vol/vsa_1_vol1/lun_linux_2 igroup_linux node_A_1-new,node_A_2-new vsa_1 /vol/vsa_1_vol1/lun_linux_3 igroup_linux node_A_1-new,node_A_2-new vsa_1 /vol/vsa_1_vol2/lun_linux_4 group_linux node_A_1-new,node_A_2-new . . . 12 entries were displayed.
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。
sg3-utils软件包必须安装在Linux主机上。这样可防止出现rescan-scsi-bus.sh utility not found使用重新扫描Linux主机以查找新映射的LUN时出错rescan-scsi-bus命令：在主机上、验证是否已启用
sg3-utils软件包已安装：-
对于基于Debian的发行版：
dpkg -l | grep sg3-utils -
对于基于Red Hat的分发版：
rpm -qa | grep sg3-utils
如果需要、请安装
sg3-utilsLinux主机上的软件包：sudo apt-get install sg3-utils -
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在iSCSI主机上、重新扫描SCSI总线：
/usr/bin/rescan-scsi-bus.sh -r删除的路径是旧节点的路径。
[root@scspr1789621001 ~]# /usr/bin/rescan-scsi-bus.sh -r Syncing file systems Scanning SCSI subsystem for new devices and remove devices that have disappeared Scanning host 0 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs Scanning host 1 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs Scanning host 2 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs sg0 changed: LU not available (PQual 1) REM: Host: scsi2 Channel: 00 Id: 00 Lun: 00 DEL: Vendor: NETAPP Model: LUN C-Mode Rev: 9800 Type: Direct-Access ANSI SCSI revision: 05 sg2 changed: LU not available (PQual 1) . . . OLD: Host: scsi5 Channel: 00 Id: 00 Lun: 09 Vendor: NETAPP Model: LUN C-Mode Rev: 9800 Type: Direct-Access ANSI SCSI revision: 05 0 new or changed device(s) found. 0 remapped or resized device(s) found. 24 device(s) removed. [2:0:0:0] [2:0:0:1] . . .
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在iSCSI主机上、验证是否仅显示新节点的路径：
sanlun lun show -pmultipath -ll -d