NVMe over TCP环境搭建和卸载

总结

本文讲述了如何在两个femu间搭建NVMe over TCP环境

前置知识

这里不过多解释何为NVMe over TCP，简单来说就是使用TCP协议下发NVMe命令给远端的NVMe设备。

NVMe over TCP环境搭建时，发送NVMe命令的叫做host端，接收NVMe命令的叫target端

femu启动时，默认用的是主机端的IP地址，为了两个femu之间能够通信，需要两个femu都有独立的IP，可以通过在主机端搭建虚拟网桥和虚拟网卡使两个femu拥有独立IP

1. 检查内核配置

在开始之前需要确定NVME_TCP、NVME_TARGET等内核配置是被set的 

$ cat /boot/config-`uname -r` | grep NVME

# NVME Support
CONFIG_NVME_CORE=m
CONFIG_BLK_DEV_NVME=m
# CONFIG_NVME_MULTIPATH is not set
# CONFIG_NVME_HWMON is not set
CONFIG_NVME_FABRICS=m
CONFIG_NVME_FC=m
CONFIG_NVME_TCP=m
CONFIG_NVME_TARGET=m
CONFIG_NVME_TARGET_LOOP=m
CONFIG_NVME_TARGET_FC=m
# CONFIG_NVME_TARGET_FCLOOP is not set
CONFIG_NVME_TARGET_TCP=m
# end of NVME Support

2. initiator端和target端安装nvme-cli