System and Network configuration • NFS server suddenly won't start and the error codes are a little vague

Code:

$ sudo systemctl status nfs-server× nfs-server.service - NFS server and services     Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; preset: enabled)    Drop-In: /run/systemd/generator/nfs-server.service.d             └─order-with-mounts.conf     Active: failed (Result: exit-code) since Wed 2024-06-05 12:46:12 PDT; 4min 34s ago    Process: 528 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS)    Process: 529 ExecStart=/usr/sbin/rpc.nfsd (code=exited, status=1/FAILURE)    Process: 550 ExecStopPost=/usr/sbin/exportfs -au (code=exited, status=0/SUCCESS)    Process: 551 ExecStopPost=/usr/sbin/exportfs -f (code=exited, status=0/SUCCESS)   Main PID: 529 (code=exited, status=1/FAILURE)        CPU: 14msJun 05 12:46:12 server3 systemd[1]: Starting nfs-server.service - NFS server and services...Jun 05 12:46:12 server3 rpc.nfsd[529]: rpc.nfsd: writing fd to kernel failed: errno 111 (Connection refused)Jun 05 12:46:12 server3 rpc.nfsd[529]: rpc.nfsd: unable to set any sockets for nfsdJun 05 12:46:12 server3 systemd[1]: nfs-server.service: Main process exited, code=exited, status=1/FAILUREJun 05 12:46:12 server3 systemd[1]: nfs-server.service: Failed with result 'exit-code'.Jun 05 12:46:12 server3 systemd[1]: Stopped nfs-server.service - NFS server and services.

Code:

$ sudo systemctl status rpc.nfsdUnit rpc.nfsd.service could not be found.

Code:

2024-06-05T13:45:01.918598-07:00 server3 systemd[1]: auth-rpcgss-module.service - Kernel Module supporting RPCSEC_GSS was skipped because of an unmet condition check (ConditionPathExists=/etc/krb5.keytab).2024-06-05T13:45:01.935181-07:00 server3 systemd[1]: Starting nfs-idmapd.service - NFSv4 ID-name mapping service...2024-06-05T13:45:01.943100-07:00 server3 systemd[1]: Starting nfs-mountd.service - NFS Mount Daemon...2024-06-05T13:45:01.943334-07:00 server3 rpc.idmapd[6345]: Setting log level to 02024-06-05T13:45:01.946211-07:00 server3 systemd[1]: rpc-gssd.service - RPC security service for NFS client and server was skipped because of an unmet condition check (ConditionPathExists=/etc/krb5.keytab).2024-06-05T13:45:01.946324-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 1, udp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.946626-07:00 server3 systemd[1]: Starting rpc-statd.service - NFS status monitor for NFSv2/3 locking....2024-06-05T13:45:01.946683-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 1, tcp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.946934-07:00 server3 systemd[1]: rpc-svcgssd.service - RPC security service for NFS server was skipped because of an unmet condition check (ConditionPathExists=/etc/krb5.keytab).2024-06-05T13:45:01.946985-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 1, udp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.947020-07:00 server3 systemd[1]: Started nfs-idmapd.service - NFSv4 ID-name mapping service.2024-06-05T13:45:01.947060-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 1, tcp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.947086-07:00 server3 systemd[1]: Started nfs-mountd.service - NFS Mount Daemon.2024-06-05T13:45:01.947121-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 2, udp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.947146-07:00 server3 systemd[1]: rpc-statd.service: Control process exited, code=exited, status=1/FAILURE2024-06-05T13:45:01.947190-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 2, tcp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.947216-07:00 server3 systemd[1]: rpc-statd.service: Failed with result 'exit-code'.2024-06-05T13:45:01.947248-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 2, udp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.947278-07:00 server3 systemd[1]: Failed to start rpc-statd.service - NFS status monitor for NFSv2/3 locking..2024-06-05T13:45:01.947313-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 2, tcp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.947337-07:00 server3 systemd[1]: Starting nfs-server.service - NFS server and services...2024-06-05T13:45:01.948596-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 3, udp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.948685-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 3, tcp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.948893-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 3, udp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.948967-07:00 server3 rpc.statd[6347]: Version 2.6.2 starting2024-06-05T13:45:01.949007-07:00 server3 rpc.statd[6347]: Flags: TI-RPC2024-06-05T13:45:01.949038-07:00 server3 rpc.mountd[6344]: Failed to register (mountd, 3, tcp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.949062-07:00 server3 rpc.mountd[6344]: mountd: No V2 or V3 listeners created!2024-06-05T13:45:01.949227-07:00 server3 rpc.mountd[6348]: Version 2.6.2 starting2024-06-05T13:45:01.949307-07:00 server3 rpc.statd[6347]: Failed to register (statd, 1, udp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.949335-07:00 server3 rpc.statd[6347]: Failed to register (statd, 1, tcp): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.949359-07:00 server3 rpc.statd[6347]: Failed to register (statd, 1, udp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.949383-07:00 server3 rpc.statd[6347]: Failed to register (statd, 1, tcp6): svc_reg() err: RPC: Remote system error - Connection refused2024-06-05T13:45:01.949408-07:00 server3 rpc.statd[6347]: failed to create RPC listeners, exiting2024-06-05T13:45:01.950718-07:00 server3 kernel: [ 3532.882449] svc: failed to register nfsdv3 RPC service (errno 111).2024-06-05T13:45:01.950726-07:00 server3 kernel: [ 3532.882472] svc: failed to register nfsaclv3 RPC service (errno 111).2024-06-05T13:45:01.980874-07:00 server3 rpc.nfsd[6350]: rpc.nfsd: writing fd to kernel failed: errno 111 (Connection refused)2024-06-05T13:45:01.980948-07:00 server3 rpc.nfsd[6350]: rpc.nfsd: unable to set any sockets for nfsd2024-06-05T13:45:01.981021-07:00 server3 systemd[1]: nfs-server.service: Main process exited, code=exited, status=1/FAILURE2024-06-05T13:45:01.985394-07:00 server3 systemd[1]: nfs-server.service: Failed with result 'exit-code'.2024-06-05T13:45:01.985654-07:00 server3 systemd[1]: Stopped nfs-server.service - NFS server and services.2024-06-05T13:45:01.986072-07:00 server3 rpc.idmapd[6345]: exiting on signal 152024-06-05T13:45:01.986217-07:00 server3 systemd[1]: Stopping nfs-idmapd.service - NFSv4 ID-name mapping service...2024-06-05T13:45:01.986352-07:00 server3 systemd[1]: Stopping nfs-mountd.service - NFS Mount Daemon...2024-06-05T13:45:01.986640-07:00 server3 systemd[1]: nfs-idmapd.service: Deactivated successfully.2024-06-05T13:45:01.986736-07:00 server3 rpc.mountd[6348]: Caught signal 15, un-registering and exiting.2024-06-05T13:45:01.986867-07:00 server3 systemd[1]: Stopped nfs-idmapd.service - NFSv4 ID-name mapping service.2024-06-05T13:45:02.007528-07:00 server3 systemd[1]: nfs-mountd.service: Deactivated successfully.2024-06-05T13:45:02.007763-07:00 server3 systemd[1]: Stopped nfs-mountd.service - NFS Mount Daemon.

Code:

/mnt/vol01 192.168.8.11(rw,no_root_squash,subtree_check)

Code:

$ sudo systemctl status rpcbind○ rpcbind.service     Loaded: masked (Reason: Unit rpcbind.service is masked.)     Active: inactive (dead)

Code:

$ uname -aLinux server3 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux