doc/iscsi: update iscsi documentation
Change-Id: I06e8e4f8d6746319142fc079313f5b6c0b7da869 Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com> Reviewed-on: https://review.gerrithub.io/423156 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
This commit is contained in:
Tomasz Kulasek
Jim Harris
parent
a62d80f98f
commit
e87352fa93
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doc/img/iscsi.svg
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138
doc/iscsi.md
138
doc/iscsi.md
@ -16,7 +16,14 @@ If you want to kill the application by using signal, make sure use the SIGTERM,
|
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will release all the shared memory resource before exit, the SIGKILL will make the shared memory
|
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resource have no chance to be released by applications, you may need to release the resource manually.
|
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## Configuring iSCSI Target {#iscsi_config}
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## Introduction
|
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The following diagram shows relations between different parts of iSCSI structure described in this
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document.
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## Configuring iSCSI Target via config file {#iscsi_config}
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A `iscsi_tgt` specific configuration file is used to configure the iSCSI target. A fully documented
|
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example configuration file is located at `etc/spdk/iscsi.conf.in`.
|
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@ -34,7 +41,7 @@ the target requires elevated privileges (root) to run.
|
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app/iscsi_tgt/iscsi_tgt -c /path/to/iscsi.conf
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~~~
|
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## Assigning CPU Cores to the iSCSI Target {#iscsi_config_lcore}
|
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### Assigning CPU Cores to the iSCSI Target {#iscsi_config_lcore}
|
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|
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SPDK uses the [DPDK Environment Abstraction Layer](http://dpdk.org/doc/guides/prog_guide/env_abstraction_layer.html)
|
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to gain access to hardware resources such as huge memory pages and CPU core(s). DPDK EAL provides
|
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@ -50,7 +57,7 @@ to assign lcores 24,25,26 and 27 to iSCSI target work items, set the ReactorMask
|
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ReactorMask 0xF000000
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~~~
|
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## Configuring a LUN in the iSCSI Target {#iscsi_lun}
|
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### Configuring a LUN in the iSCSI Target {#iscsi_lun}
|
||||
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Each LUN in an iSCSI target node is associated with an SPDK block device. See @ref bdev
|
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for details on configuring SPDK block devices. The block device to LUN mappings are specified in the
|
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@ -71,28 +78,38 @@ channels.
|
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In addition to the configuration file, the iSCSI target may also be configured via JSON-RPC calls. See
|
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@ref jsonrpc for details.
|
||||
|
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### Add the portal group
|
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### Portal groups
|
||||
|
||||
- add_portal_group -- Add a portal group.
|
||||
- delete_portal_group -- Delete an existing portal group.
|
||||
- add_pg_ig_maps -- Add initiator group to portal group mappings to an existing iSCSI target node.
|
||||
- delete_pg_ig_maps -- Delete initiator group to portal group mappings from an existing iSCSI target node.
|
||||
- get_portal_groups -- Show information about all available portal groups.
|
||||
|
||||
~~~
|
||||
python /path/to/spdk/scripts/rpc.py add_portal_group 1 127.0.0.1:3260
|
||||
python /path/to/spdk/scripts/rpc.py add_portal_group 1 10.0.0.1:3260
|
||||
~~~
|
||||
|
||||
### Add the initiator group
|
||||
### Initiator groups
|
||||
|
||||
- add_initiator_group -- Add an initiator group.
|
||||
- delete_initiator_group -- Delete an existing initiator group.
|
||||
- add_initiators_to_initiator_group -- Add initiators to an existing initiator group.
|
||||
- get_initiator_groups -- Show information about all available initiator groups.
|
||||
|
||||
~~~
|
||||
python /path/to/spdk/scripts/rpc.py add_initiator_group 2 ANY 127.0.0.1/32
|
||||
python /path/to/spdk/scripts/rpc.py add_initiator_group 2 ANY 10.0.0.2/32
|
||||
~~~
|
||||
|
||||
### Construct the backend block device
|
||||
### Target nodes
|
||||
|
||||
- construct_target_node -- Add a iSCSI target node.
|
||||
- delete_target_node -- Delete a iSCSI target node.
|
||||
- target_node_add_lun -- Add an LUN to an existing iSCSI target node.
|
||||
- get_target_nodes -- Show information about all available iSCSI target nodes.
|
||||
|
||||
~~~
|
||||
python /path/to/spdk/scripts/rpc.py construct_malloc_bdev -b MyBdev 64 512
|
||||
~~~
|
||||
|
||||
### Construct the target node
|
||||
|
||||
~~~
|
||||
python /path/to/spdk/scripts/rpc.py construct_target_node Target3 Target3_alias MyBdev:0 1:2 64 0 0 0 1
|
||||
python /path/to/spdk/scripts/rpc.py construct_target_node Target3 Target3_alias MyBdev:0 1:2 64 -d
|
||||
~~~
|
||||
|
||||
## Configuring iSCSI Initiator {#iscsi_initiator}
|
||||
@ -141,9 +158,9 @@ net.core.netdev_max_backlog = 300000
|
||||
|
||||
### Discovery
|
||||
|
||||
Assume target is at 192.168.1.5
|
||||
Assume target is at 10.0.0.1
|
||||
~~~
|
||||
iscsiadm -m discovery -t sendtargets -p 192.168.1.5
|
||||
iscsiadm -m discovery -t sendtargets -p 10.0.0.1
|
||||
~~~
|
||||
|
||||
### Connect to target
|
||||
@ -199,6 +216,93 @@ Increase requests for block queue
|
||||
echo "1024" > /sys/block/sdc/queue/nr_requests
|
||||
~~~
|
||||
|
||||
### Example: Configure simple iSCSI Target with one portal and two LUNs
|
||||
|
||||
Assuming we have one iSCSI Target server with portal at 10.0.0.1:3200, two LUNs (Malloc0 and Malloc),
|
||||
and accepting initiators on 10.0.0.2/32, like on diagram below:
|
||||
|
||||
|
||||
|
||||
#### Configure iSCSI Target
|
||||
|
||||
Start iscsi_tgt application:
|
||||
```
|
||||
$ ./app/iscsi_tgt/iscsi_tgt
|
||||
```
|
||||
|
||||
Construct two 64MB Malloc block devices with 512B sector size "Malloc0" and "Malloc1":
|
||||
|
||||
```
|
||||
$ python ./scripts/rpc.py construct_malloc_bdev -b Malloc0 64 512
|
||||
$ python ./scripts/rpc.py construct_malloc_bdev -b Malloc1 64 512
|
||||
```
|
||||
|
||||
Create new portal group with id 1, and address 10.0.0.1:3260:
|
||||
|
||||
```
|
||||
$ python ./scripts/rpc.py add_portal_group 1 10.0.0.1:3260
|
||||
```
|
||||
|
||||
Create one initiator group with id 2 to accept any connection from 10.0.0.2/32:
|
||||
|
||||
```
|
||||
$ python ./scripts/rpc.py add_initiator_group 2 ANY 10.0.0.2/32
|
||||
```
|
||||
|
||||
Finaly construct one target using previously created bdevs as LUN0 (Malloc0) and LUN1 (Malloc1)
|
||||
with a name "disk1" and alias "Data Disk1" using portal group 1 and initiator group 2.
|
||||
|
||||
```
|
||||
$ python ./scripts/rpc.py construct_target_node disk1 "Data Disk1" "Malloc0:0 Malloc1:1" 1:2 64 -d
|
||||
```
|
||||
|
||||
#### Configure initiator
|
||||
|
||||
Discover target
|
||||
|
||||
~~~
|
||||
$ iscsiadm -m discovery -t sendtargets -p 10.0.0.1
|
||||
10.0.0.1:3260,1 iqn.2016-06.io.spdk:disk1
|
||||
~~~
|
||||
|
||||
Connect to the target
|
||||
|
||||
~~~
|
||||
$ iscsiadm -m node --login
|
||||
~~~
|
||||
|
||||
At this point the iSCSI target should show up as SCSI disks.
|
||||
|
||||
Check dmesg to see what they came up as. In this example it can look like below:
|
||||
|
||||
~~~
|
||||
...
|
||||
[630111.860078] scsi host68: iSCSI Initiator over TCP/IP
|
||||
[630112.124743] scsi 68:0:0:0: Direct-Access INTEL Malloc disk 0001 PQ: 0 ANSI: 5
|
||||
[630112.125445] sd 68:0:0:0: [sdd] 131072 512-byte logical blocks: (67.1 MB/64.0 MiB)
|
||||
[630112.125468] sd 68:0:0:0: Attached scsi generic sg3 type 0
|
||||
[630112.125926] sd 68:0:0:0: [sdd] Write Protect is off
|
||||
[630112.125934] sd 68:0:0:0: [sdd] Mode Sense: 83 00 00 08
|
||||
[630112.126049] sd 68:0:0:0: [sdd] Write cache: enabled, read cache: disabled, doesn't support DPO or FUA
|
||||
[630112.126483] scsi 68:0:0:1: Direct-Access INTEL Malloc disk 0001 PQ: 0 ANSI: 5
|
||||
[630112.127096] sd 68:0:0:1: Attached scsi generic sg4 type 0
|
||||
[630112.127143] sd 68:0:0:1: [sde] 131072 512-byte logical blocks: (67.1 MB/64.0 MiB)
|
||||
[630112.127566] sd 68:0:0:1: [sde] Write Protect is off
|
||||
[630112.127573] sd 68:0:0:1: [sde] Mode Sense: 83 00 00 08
|
||||
[630112.127728] sd 68:0:0:1: [sde] Write cache: enabled, read cache: disabled, doesn't support DPO or FUA
|
||||
[630112.128246] sd 68:0:0:0: [sdd] Attached SCSI disk
|
||||
[630112.129789] sd 68:0:0:1: [sde] Attached SCSI disk
|
||||
...
|
||||
~~~
|
||||
|
||||
You may also use simple bash command to find /dev/sdX nodes for each iSCSI LUN
|
||||
in all logged iSCSI sessions:
|
||||
|
||||
~~~
|
||||
$ iscsiadm -m session -P 3 | grep "Attached scsi disk" | awk '{print $4}'
|
||||
sdd
|
||||
sde
|
||||
~~~
|
||||
|
||||
# Vector Packet Processing {#vpp}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user