无法在Centos 7中启动NFS：无法发出方法调用：没有这样的文件或目录

我无法在CentOS7中启动NFS服务器。

下载的软件包：

yum -y install nfs-utils
yum -y install nfs-utils-lib

启用/启动服务

systemctl enable/start rpcbind
systemctl enable/start nfs-server
systemctl enable/start nfs-lock
systemctl enable/start nfs-idmap

这导致 ：

systemctl enable nfs-lock
Failed to issue method call: No such file or directory
systemctl enable nfs-idmap
Failed to issue method call: No such file or directory

创建了共享：

mkdir -p /test
chmod 777 /test

出口罚款：

exportfs
/test           clientip/24

但是，在执行systemctlrestart时nfs-server，它失败并journalctl显示依赖性错误，显示：

[user@server /]# journalctl -xn | grep failed
-- Subject: Unit proc-fs-nfsd.mount has failed
-- Unit proc-fs-nfsd.mount has failed.
-- The result is failed.
Jun 23 17:06:41 server systemd[1]: Dependency failed for NFS server and services.
-- Subject: Unit nfs-server.service has failed
-- Unit nfs-server.service has failed.
Jun 23 17:06:41 server systemd[1]: Dependency failed for NFS Mount Daemon.
-- Subject: Unit nfs-mountd.service has failed
-- Unit nfs-mountd.service has failed.
Jun 23 17:06:41 open

并且systemctl列表单元状态也显示失败

systemctl list-units | grep nfs
proc-fs-nfsd.mount                      loaded failed failed    NFSD configuration filesystem
var-lib-nfs-rpc_pipefs.mount            loaded failed failed    RPC Pipe File System
nfs-config.service                      loaded active exited    Preprocess NFS configuration
nfs-idmapd.service                      loaded failed failed    NFSv4 ID-name mapping service

/var/log/messages：

Jun 23 17:06:41 server systemd: Dependency failed for RPC security service for NFS server.
Jun 23 17:06:41 server systemd: Dependency failed for RPC security service for NFS client and server.
Jun 23 17:06:41 server systemd: Unit var-lib-nfs-rpc_pipefs.mount entered failed state.
Jun 23 17:06:41 server systemd: nfs-idmapd.service: control process exited, code=exited status=1
Jun 23 17:06:41 server systemd: Unit nfs-idmapd.service entered failed state.
Jun 23 17:06:41 server systemd: proc-fs-nfsd.mount mount process exited, code=exited status=32
Jun 23 17:06:41 server systemd: Dependency failed for NFS server and services.
Jun 23 17:06:41 server systemd: Dependency failed for NFS Mount Daemon.
Jun 23 17:06:41 server systemd: Unit proc-fs-nfsd.mount entered failed state.
Jun 23 17:12:53 server mount: mount: unknown filesystem type 'nfsd'
Jun 23 17:12:53 server systemd: proc-fs-nfsd.mount mount process exited, code=exited status=32
Jun 23 17:12:53 server rpc.idmapd[842]: main: open(/var/lib/nfs/rpc_pipefs//nfs): No such file or directory
Jun 23 17:12:53 server systemd: Dependency failed for NFS server and services.
Jun 23 17:12:53 server systemd: Dependency failed for NFSv4 ID-name mapping service.
Jun 23 17:12:53 server systemd: Dependency failed for NFS Mount Daemon.
Jun 23 17:12:53 server systemd: Unit proc-fs-nfsd.mount entered failed state.

客户报告，并且我认为根据上述错误是正常的：

RPC: Remote system errorRPC: Port mapper failure - RPC: Timed out.

我用@ user136564的帖子解决了这个问题。

这解决了我的问题https://www.centos.org/forums/viewtopic.php?f=47&t=53896

我发现我的问题是，即使我在systemd中启用了rpcbind，它也不会在启动时启动，我可以手动启动它。

这些命令是我在CentOS Linux版本7.2.1511（核心）上执行的操作

安装nfs-utils

yum install -y nfs-utils

将文字附加到 /etc/fstab

192.168.1.100:/mnt/nfs-server /mnt/nfs-client nfs defaults,nofail,x-systemd.automount 0 0

有些文章说noauto,x-systemd.automount更好，但是noauto对我来说却没有效果。

检查安装是否正常

systemctl start rpcbind
systemctl enable rpcbind
mount -a

解决了CentOS 7在启动时不会自动挂载NFS的问题

将文本追加到/usr/lib/systemd/system/nfs-idmap.service的末尾

[Install]
WantedBy=multi-user.target

将文本追加到/usr/lib/systemd/system/nfs-lock.service的末尾

[Install]
WantedBy=nfs.target

启用相关服务

systemctl enable nfs-idmapd.service 
systemctl enable rpc-statd.service 

systemctl enable rpcbind.socket

systemctl status nfs-idmapd.service -l
systemctl status rpc-statd.service –l

然后重新启动操作系统，我明白了。

shutdown -r now