https://github.com/linux-nvme/nvme-dem

NVMe over Fabrics Distributed Endpoint Management - an implementation of a centralized Discovery controller providing remote configuration and provisioning of remote NVMe resources.
https://github.com/linux-nvme/nvme-dem

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NVMe over Fabrics Distributed Endpoint Management - an implementation of a centralized Discovery controller providing remote configuration and provisioning of remote NVMe resources.

• Host: GitHub
• URL: https://github.com/linux-nvme/nvme-dem
• Owner: linux-nvme
• License: other
• Created: 2018-09-04T20:20:30.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2022-07-07T16:35:03.000Z (over 2 years ago)
• Last Synced: 2024-08-12T00:49:09.406Z (3 months ago)
• Language: C
• Homepage:
• Size: 8.45 MB
• Stars: 33
• Watchers: 13
• Forks: 10
• Open Issues: 1
• Metadata Files:
  • Readme: README
  • Changelog: ChangeLog
  • License: COPYING

Awesome Lists containing this project

README

        
NVMe Distributed Endpoirt Management (DEM) Project Table of Contents:

  Project Components

  Endpoint Management Modes

  System Configuration

  Build and Installation

  Service Configuration

  Starting NVMe-oF Drivers

  Manually Starting - Endpoint Manger

  Manually Starting - DEM

  Manually Starting - Auto Connect

  Manually Starting - Discovery Monitor

  Configuration Methods

1. Project Components

   Distrubited Endpoint Manager (DEM)

      Primary component of DEM providing both a centralized Discovery

      controller and a management capabilities to configure Targets,

      May be used standalone or in concert with other DEM components.

      Purposes:

         1. Collect and distribute discovery log pages

         2. Configure remote NVMe resources via in-band or out-of-band

            interfaces

   Endpoint Manager (DEM-EM)

      Optional mechanism for In-band or out-of-band configuration of each

      Target used in concert with DEM

   Auto Connect (DEM-AC)

      Optional component to enable Hosts to connect to DEM and automatically

      connect to provisioned NVMe resources as defined by Discovery Log Pages

   Discovery Monitor (DEM-DM)

      Optional component to enable Hosts to monitor provisioned NVMe

      resources via DEM

   Command Line Interface (DEM-CLI)

      Mechanism to interface the DEM via console command line

   Web interface

      Mechanism to interface the DEM via HTML web interface

2. Endpoint Management Modes

   Local:

      The DEM does not configure individual Targets/Subsystems. Individual

      Targets must be locally configured.  The DEM must be informed about

      Target Interfaces to connect to in order to query log-pages.

      Subsystems must be defined to associate log-pages for distribution.

   In-band:

      The DEM uses a designated NVMe-oF fabric interface to talk with Targets.

      The DEM is configured with all Individual Target Endpoint Manager (EM)

      interfaces to connect to. The DEM will then query Individual EM for

      physical fabric interface and NVMe device resources. The DEM

      Administrator has the ability to assign individual Target resources

      to NVMe-oF Port ID and Subsystems/Namespaces.

   Out-of-Band:

      The Out-of-Band management mode operates the same as In-band management

      mode however uses a RESTful interface to communicate with the EM.

3. System Configuration

   Kernel requirement:

      Minimum of 4.15 or Linux Distribution supporting NVMe-oF

      (e.g., RHEL 7.5, SUSE12 SP3)

   Download the kernel:

      $ git clone https://github.com/linux-nvme/nvme-dem.git

   Copy the existing /lib/modules/`uname -r`/source/.config to the downloaded

   kernel directory.

   Install the kernel

   Verify openssl-devel package present and installed.

   If not present, download and install

      Make

      Edit config file:

         ensure CONFIG_NVME_RDMA, CONFIG_NVME_FC, CONFIG_NVME_TARGET enabled.

      make and answer module questions for NVMe Target sub-modules

         $ make

         $ make modules_install

         $ sudo make install

      Ensure the system will boot to the new kernel

         # grep "^menuentry" /boot/grub2/grub.cfg | cut -d "'" -f2

         # grub2-set-default 

   Boot the new kernel

4. Build and Installation

   Repository

   $ git clone https://gitlab.com/nvme-over-fabrics/nvme-dem.git

   Pulled as part of make (if not copied to mongoose/.git and jansson/.git)

         https://github.com/cesanta/mongoose.git

         https://github.com/akheron/jansson.git

   If target system is behind a head node and does not have access to the

   internet clone on a system with access, then build without installing then

   tar and copy tar file to remote system

   Libraries Required

       libcurl-devel    librdmacm-devel    libpthread-devel

       libuuid-devel    libibverbs-devel

   Build and install

       $ ./autoconf.sh

       $ ./configure (optional flag: --enable-debug)

       $ make

   As root, run the following

       # make install

   Man pages for dem, dem-em, dem-ac, and dem-cli are available after install

5. Service Configuration

   Edit /etc/nvme/nvmeof.conf to enable appropriate component.

   Following is example for system as both RDMA Host and Target and using

   nullb0 for device and manually starting DEM

       PCI_HOST_LOAD=no

       NVMEOF_HOST_LOAD=yes

          RDMA_HOST_LOAD=yes

          FC_HOST_LOAD=no

          TCP_HOST_LOAD=no

       NVMEOF_TARGET_LOAD=yes

          RDMA_TARGET_LOAD=yes

          FC_TARGET_LOAD=no

          TCP_TARGET_LOAD=no

          NULL_BLK_TARGET_LOAD=yes

       START_DEM=no

       START_DEM_AC=no

       START_DEM_EM=no

       # DEM_AC_OPTS="-t rdma -f ipv4 -a 192.168.1.1 -s 4422"

       # DEM_EM_OPTS="-t rdma -f ipv4 -a 192.168.1.1 -s 22334"

       # DEM_EM_OPTS="-p 22345"

6. Starting NVMe-oF Drivers

   1. Manually Start using nvmeof service

       # systemctl start nvmeof

   2. Configure the system to start DEM on boot

       # chkconfig nvmeof on

       # reboot

      or

       # systemctl start nvmeof

   3. If not running nvmeof service, load individual DEM drivers

       # modprobe configfs

       # modprobe nvme-rdma

       # modprobe nvmet-rdma

       # modprobe null-blk

7. Manually Starting - Endpoint Manager (dem-em)

   Optional mechanism for In-band or out-of-band configuration of each Target.

   Only needed if a systems administrator will be remotely managing remote

   NVMe resources.

   Configure fabric interface(s) the Endpoint Manager will report to the DEM

   (Discovery Controller).  This is the fabric interface the DEM will use

   for NVMe-oF.  This is done via files ifcfg-like files under

   /etc/nvme/nvmeof-dem (file ‘config’ and ‘signature’ are reserved).

   Example RDMA interface on IP-Address “192.168.22.1”. Note: The specification

   of a TRSVCID is an indication that the DEM should use this transport for

   Hosts to connect for retrieval of Discovery Log pages. The TRSVCID in the

   example below is not used by the Endpoint Manager - TRSVCID used by Target

   drivers are assigned by administrator through DEM configuration. This

   TRSVCID is only used by the DEM daemon.

      # Configuration file for RDMA interface

      TRTYPE=rdma

      ADRFAM=ipv4

      TRADDR=192.168.22.1

      TRSVCID=4422  # Service ID only used by DEM Discovery Controller

   Start Target Endpoint Manager specifying ‘management mode’.  This is the

   mechanism the DEM will use to communicate to the DEM-EM.  This is only

   used for configuration purposes.

      A. Out-of-Band management mode specifying RESTful interfaces on

         port 22334.

         # dem-em -p 22334

      B. In-Band management mode on rdma ipv4 address “192.168.22.1”.

         The Service ID is definable, but cannot be “4420” as this would

         conflict with the Target driver.

         # dem-em -t rdma -f ipv4 -a 192.168.22.1 -s 4433

   Starting either in-band or out-of-band DEM-EM reports enumerated devices

   and interfaces.

   If run in debug-mode the DEM-EM will not start as a daemon, and all output

   will be sent to stdout rather than to /var/log/…

8. Manually Starting - DEM Dicsovery Controller (dem)

   Configure fabric interface(s) for Host communication to DEM Discovery

   Controller.  This is the fabric interface DEM listens on for Hosts to

   connect and request Discovery Log Pages.  This is done via ifcfg-like

   files under /etc/nvme/nvmeof-dem (file ‘config’ and ‘signature’ are

   reserved).

   Example RDMA interface on IP-Address 192.168.22.2.  If the TRSVCID is not

   present in a given configuration file, the default TRSVCID for that

   interface is the pre-assigned NVMe-oF ID "4420".

   Note 1: TRSVCID “4420” is the pre-assigned NVMe-oF ID and MAY ONLY be used

   if the DEM Discovery Controller is NOT co-located with an NVMe-oF Target

   driver.

   Note 2: If the DEM Discovery Controller and DEM Endpoint Manager are

   co-located configuration files will be used by both services to define

   interfaces used for communication with Hosts.

      # Configuration file for RDMA interface

      TRTYPE=rdma

      ADRFAM=ipv4

      TRADDR=192.168.22.2

      TRSVCID=4422  # Service ID only used by DEM Discovery Controller

   Starting DEM Discovery Controller specifying RESTful interfaces on a port.

   Default HTTP port is 22345

      # dem -p 

   If run in debug-mode the DEM will not start as a daemon, and all output will

   be sent to stdout rather than to /var/log/…

9. Manually Starting - Auto Connect (dem-ac)

   Optional component to enable Hosts to connect to a Discovery controller

   (DEM or NVMe-oF Target) and automatically connect to provisioned NVMe

   resources as defined by Discovery Log Pages.

   Starting Auto Connect to address of the DEM Discovery Controller.

      # dem-ac -t rdma -f ipv4 -a 192.168.22.2 -s 4422

   Starting Auto Connect to address of an NVMe-oF Target Discovery Controller

      # dem-ac -t rdma -f ipv4 -a 192.168.22.200 -s 4420

   If run in debug-mode the DEM-AC will not start as a daemon, and all output

   will be sent to stdout rather than to /var/log/…

10. Manually Starting - Discovery Monitor (dem-dm)

   Optional component to enable Hosts to monitor a Discovery Controller

   (DEM or NVMe-oF Target) and report provisioned NVMe resources as defined

   by Discovery Log Pages.

   Starting Monitor and point it to the address of the DEM Discovery Controller.

      # dem-dm -t rdma -f ipv4 -a 192.168.22.2 -s 4422

   Starting Monitor and point it to the address of an NVMe-oF Target Discovery

   Controller.

      # dem-dm -t rdma -f ipv4 -a 192.168.22.200 -s 4420

11. Configuration Methods

   Web interface: Mechanism to interface with the DEM via HTTP web interface

   Default userid / password is 'dem' and 'nvmeof'.  Web site may be remote

   from dem to allow bridge to lab networks

   Create subdirectory for DEM on the web hosting site and copy web files

      $ mkdir /var/www/html/dem

      $ cp html/* /var/www/html/dem

   Command Line Interface (DEM-CLI): Mechanism to interface with the DEM via

   console command line.  dem-cli command on system running dem allows full

   configuration of targets and hosts Man page install and --help explains

   options

   cURL: Lowest-level mechanism to interface with the DEM.  cURL may be used

   if you are willing to construct JSON objects Examples of cURL commands are

   in the Makefile