nfs介绍

NFS

https://nfs.sourceforge.net/

#debian
sudo apt-get install nfs-common   nfs-kernel-server  -y

#centos
sudo yum install nfs-utils   rpcbind   -y

#下载安装包

sudo apt-get install nfs-common nfs-kernel-server -y –download-only

sudo yum install nfs-utils rpcbind -y –downloadonly –downloaddir /opt/nfs

1. 首先服务器端启动RPC服务，并开启111端口；启动NFS服务，并向RPC注册端口信息
2. 客户端启动RPC（portmap服务），向服务端的RPC(portmap)服务请求服务端的NFS端口（由程序在NFS客户端发起存取文件的请求，客户端本地的RPC(rpcbind)服务会通过网络向NFS服务端的RPC的111端口发出文件存取功能的请求。）
3. 服务端的RPC(portmap)服务反馈NFS端口信息给客户端。
4. 客户端通过获取的NFS端口来建立和服务端的NFS连接并进行数据的传输。（客户端获取正确的端口，并与NFS daemon联机存取数据。）
5. 存取数据成功后，返回前端访问程序，完成一次存取操作。

安装

sudo rpm -ivh  /opt/nfs/*.rpm --force --nodeps 

#debian
sudo dpkg -i   /opt/nfs/*.deb

服务端

设置共享目录

#开启
systemctl enable nfs
systemctl restart nfs
systemctl status nfs
#debian
systemctl status nfs-kernel-server

mkdir -p /opt/data/k8s/redis/{pv{1..6},srcipt}

cat  <<EOF |  tee -a  /etc/exports
/opt/data/k8s/redis/pv1  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv2  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv3  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv4  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv5  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv6  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/srcipt  192.168.122.0/24(rw,sync,no_root_squash)
EOF

cat  <<EOF |  tee -a  /etc/exports
/opt/data/k8s/mysql/pv1  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/mysql/pv2  192.168.122.0/24(rw,sync,no_root_squash)
/opt/data/k8s/mysql/pv3  192.168.122.0/24(rw,sync,no_root_squash)
EOF


#加载
exportfs -arv

#查看本机NFS共享目录
showmount -e

exports配置

/etc/exports
# /etc/exports: the access control list for filesystems which may be exported
#		to NFS clients.  See exports(5).
#
# Example for NFSv2 and NFSv3:
# /srv/homes       hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check)
#
# Example for NFSv4:
# /srv/nfs4        gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check)
# /srv/nfs4/homes  gss/krb5i(rw,sync,no_subtree_check)
#
#/opt/data     ip地址为客户端的地址或网段(rw,sync,no_root_squash,insecure)
/opt/data/k8s/redis/pv1  192.168.56.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv2  192.168.56.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv3  192.168.56.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv4  192.168.56.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv5  192.168.56.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/pv6  192.168.56.0/24(rw,sync,no_root_squash)
/opt/data/k8s/redis/srcipt  192.168.56.0/24(rw,sync,no_root_squash)
  

exportfs: /etc/exports [3]: Neither ‘subtree_check’ or ‘no_subtree_check’ specified for export “192.168.122.0/24:/home/cs/data/k8s/mysql/pv3”.
Assuming default behaviour (‘no_subtree_check’).
NOTE: this default has changed since nfs-utils version 1.0.x

#即使输出目录是一个子目录,nfs服务器也不检查其父目录的权限

/home/cs/data/k8s/mysql/pv3 192.168.122.0/24(rw,sync,no_root_squash,no_subtree_check)

重新加载 可以让配置文件,重新生效。不需要重启

❯ sudo exportfs -arv
exporting 192.168.122.0/24:/mnt/data/k8s
❯ sudo chown :cs -R //mnt/data/k8s
❯ sudo chmod g+wr /mnt/data/k8s

客户端

#服务端ip,查看服务端里面可以挂载的目录
showmount -e 192.168.122.6

#挂载
mount -t nfs 192.168.122.6:/opt/data/k8s/redis/srcipt   /opt/srcipt

sudo mount -t nfs 192.168.122.6:/opt/data/k8s/mysql/pv3 /home/cs/oss/bak/pv3

[root@base opt]# df -Th /opt/data/k8s/mysql/pv3
文件系统 类型 容量 已用 可用 已用% 挂载点
/dev/mapper/centos-root xfs 19G 2.6G 17G 14% /

开机自启挂载fstab

echo "192.168.122.6:/data /opt    nfs  default 0 0" >>/etc/fstab

$ showmount -e 192.168.122.8

clnt_create: RPC: Port mapper failure - Unable to receive: errno 113 (No route to host)

服务端防火墙

systemctl status firewalld

[root@test opt]# firewall-cmd –add-service=nfs
success
[root@test opt]# firewall-cmd –add-service=rpc-bind
success
[root@test opt]# firewall-cmd –add-service=mountd
success

卸载

❯ sudo apt remove  --purge nfs-common   nfs-kernel-server

❯ sudo apt autoremove