Up to date Arch. Kernel 4.7.2 (-1 Arch). nfs-utils 1.3.4 (-1 Arch). No firewall running on this system. Arch doesn't have any distribution-specific patches - it uses the sourceforge source - https://git.archlinux.org/svntogit/packages.git/tree/trunk?h=packages/nfs-utils I started writing that an nfs-server configured for v4.x only would never start if there was no rpcbind, BUT wound up finding out it does start, it just takes ~ 6 minutes when with rpcbind it's "instant" / less than 1 second. "This" has been occurring since I started with NFS v4.x using nfs-utils 1.3.2 & 1.3.3. By "this", I mean it looking to me like nfs-server wouldn't start without rpcbind. It was probably just starting delayed and I was impatient before 6 minutes. I've found several posts from people saying nfs-server won't start without rpcbind on v4.x only, so others have definitely ran into this, just never gave it 6 minutes to finish, or maybe theirs never finished. Looks like there was a similar issue patched in 12/2013. Same issue of rpcbind being needed for v4.x, but without rpcbind the problem was a writing fd to kernel failure from rpc.nfsd, which appears to me to have been fatal, and I'm not getting. http://www.spinics.net/lists/linux-nfs/msg41053.html This MAY answer the question - it's only visible for RedHat subscribers, which I'm not - and I have no idea if on RHEL what versions he has and if it includes the 12/2013 patch I mentioned - https://access.redhat.com/solutions/902013 /run/sysconfig/nfs-utils is: ========== RPCNFSDARGS="-N 2 -N 3 8" RPCMOUNTDARGS="-N 2 -N 3" STATDARGS="" SMNOTIFYARGS="" RPCIDMAPDARGS="" RPCGSSDARGS="" RPCSVCGSSDARGS="" BLKMAPDARGS="" GSS_USE_PROXY="yes" ========== /proc/fs/nfsd/versions is: "-2 -3 +4 +4.1 +4.2" /proc/fs/nfsd/threads is: "8" Running defaults (just adding "-N 2 -N 3" to RPCNFSDARGS and RPCMOUNTDOPTS in /etc/sysconfig/nfs), the NFS server starts fine like this, with these enabled: * proc-fs-nfsd.mount * var-lib-nfs-rpc_pipefs.mount * gssproxy.service * nfs-blkmap.service * nfs-config.service * nfs-idmapd.service * nfs-mountd.service * nfs-server.service * rpc-statd.service * rpcbind.service * rpcbind.socket nfs-server starts right away: ========== Sep 01 05:05:14 terra systemd[1]: Starting Preprocess NFS configuration... Sep 01 05:05:14 terra systemd[1]: Started Preprocess NFS configuration. ========== I'm running NFS v4.x only, and I'd like to be able to disable everything not needed. I can mask gssproxy.service, nfs-blkmap.service, and rpc-statd.service, and the NFS server still starts instantly with just these: * proc-fs-nfsd.mount * var-lib-nfs-rpc_pipefs.mount * nfs-config.service * nfs-idmapd.service * nfs-mountd.service * nfs-server.service * rpcbind.service * rpcbind.socket Since I'm running NFS v4.x only, it's my understanding I should also be able to mask rpcbind.service and rpcbind.socket and just run with these: * proc-fs-nfsd.mount * var-lib-nfs-rpc_pipefs.mount * nfs-config.service * nfs-idmapd.service * nfs-mountd.service * nfs-server.service But without rpcbind.service and rpcbind.socket, I get the 6 minute delay # systemctl start nfs-config # systemctl start proc-fs-nfsd.mount [ 45.907749] RPC: Registered named UNIX socket transport module. [ 45.907755] RPC: Registered udp transport module. [ 45.907757] RPC: Registered tcp transport module. [ 45.907759] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 45.943152] Installing knfsd (copyright (C) 1996 okir@xxxxxxxxxxxx). # rpcdebug -m nfsd -s all # systemctl start var-lib-nfs-rpc_pipefs.mount # rpc.mountd --foreground --no-udp -N 2 -N 3 rpc.mountd: Version 1.3.3 starting # rpc.idmapd -f -vvv rpc.idmapd: Skipping configuration file "/etc/idmapd.conf": No such file or directory rpc.idmapd: libnfsidmap: Unable to determine the NFSv4 domain; Using 'localdomain' as the NFSv4 domain which means UIDs will be mapped to the 'Nobody-User' user defined in /etc/idmapd.conf rpc.idmapd: libnfsidmap: using (default) domain: localdomain rpc.idmapd: libnfsidmap: Realms list: 'LOCALDOMAIN' rpc.idmapd: libnfsidmap: loaded plugin /usr/lib/libnfsidmap/nsswitch.so for method nsswitch rpc.idmapd: Expiration time is 0 seconds. rpc.idmapd: Opened /proc/net/rpc/nfs4.nametoid/channel rpc.idmapd: Opened /proc/net/rpc/nfs4.idtoname/channel rpc.idmapd: Unable to open '/proc/sys/fs/nfs/idmap_cache_timeout' to set client cache expiration time to 0 seconds {in journalctl} Sep 01 06:37:19 terra rpc.idmapd[2342]: libnfsidmap: Unable to determine the NFSv4 domain; Using 'localdomain' as the NFSv4 domain which means UIDs will be mapped to the 'Nobody-User' user defined in /etc/idmapd.conf Sep 01 06:37:19 terra rpc.idmapd[2342]: libnfsidmap: using (default) domain: localdomain Sep 01 06:37:19 terra rpc.idmapd[2342]: libnfsidmap: Realms list: 'LOCALDOMAIN' Sep 01 06:37:19 terra rpc.idmapd[2342]: libnfsidmap: loaded plugin /usr/lib/libnfsidmap/nsswitch.so for method nsswitch Sep 01 06:37:19 terra rpc.idmapd[2342]: Opened /proc/net/rpc/nfs4.nametoid/channel Sep 01 06:37:19 terra rpc.idmapd[2342]: Opened /proc/net/rpc/nfs4.idtoname/channel Sep 01 06:37:19 terra rpc.idmapd[2342]: Unable to open '/proc/sys/fs/nfs/idmap_cache_timeout' to set client cache expiration time to 0 seconds # exportfs -r # rpc.nfsd --debug --no-udp -N 2 -N 3 8 rpc.nfsd: knfsd is currently down rpc.nfsd: Writing version string to kernel: -2 -3 +4 rpc.nfsd: Created AF_INET TCP socket. {about 2 minutes later} [ 560.800037] set_max_drc nfsd_drc_max_mem 3948544 {then about 97 seconds later} rpc.nfsd: Created AF_INET6 TCP socket. [ 657.120279] nfsd: creating service [ 657.120286] nfsd: allocating 32 readahead buffers. [ 657.120376] nfsd4_umh_cltrack_upcall: cmd: init [ 657.120381] nfsd4_umh_cltrack_upcall: arg: (null) [ 657.120383] nfsd4_umh_cltrack_upcall: env0: NFSDCLTRACK_GRACE_START=1472726583 [ 657.120385] nfsd4_umh_cltrack_upcall: env1: (null) [ 657.151076] NFSD: end of grace period [ 657.151086] nfsd4_umh_cltrack_upcall: cmd: gracedone [ 657.151088] nfsd4_umh_cltrack_upcall: arg: 1472726583 [ 657.151090] nfsd4_umh_cltrack_upcall: env0: NFSDCLTRACK_LEGACY_TOPDIR=/var/lib/nfs/v4recovery [ 657.151092] nfsd4_umh_cltrack_upcall: env1: (null) [ 657.153448] nfsd4_umh_cltrack_upcall: /sbin/nfsdcltrack return value: 0 [ 657.153885] nfsd4_umh_cltrack_upcall: /sbin/nfsdcltrack return value: 0 [ 657.153890] NFSD: starting 90-second grace period (net ffffffff818b8a40) [ 747.359945] NFSD: laundromat service - starting [ 747.359953] NFSD: laundromat_main - sleeping for 90 seconds [ 837.599965] NFSD: laundromat service - starting [ 837.599973] NFSD: laundromat_main - sleeping for 90 seconds If I reboot and perform the same process, except running "strace rpc.nfsd --no-udp -N 2 -N 3 8" then I see: ========== execve("/usr/bin/rpc.nfsd", ["rpc.nfsd", "--no-udp", "-N", "2", "-N", "3", "8"], [/* 33 vars */]) = 0 brk(NULL) = 0x1609000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=69980, ...}) = 0 mmap(NULL, 69980, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8548f20000 close(3) = 0 open("/usr/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\3\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1951744, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8548f1e000 mmap(NULL, 3791152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8548972000 mprotect(0x7f8548b07000, 2093056, PROT_NONE) = 0 mmap(0x7f8548d06000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x194000) = 0x7f8548d06000 mmap(0x7f8548d0c000, 14640, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f8548d0c000 close(3) = 0 arch_prctl(ARCH_SET_FS, 0x7f8548f1f440) = 0 mprotect(0x7f8548d06000, 16384, PROT_READ) = 0 mprotect(0x604000, 4096, PROT_READ) = 0 mprotect(0x7f8548f32000, 4096, PROT_READ) = 0 munmap(0x7f8548f20000, 69980) = 0 brk(NULL) = 0x1609000 brk(0x162a000) = 0x162a000 getpid() = 2156 rt_sigaction(SIGUSR1, {0x402b10, [USR1], SA_RESTORER|SA_RESTART, 0x7f85489a50b0}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGUSR2, {0x402b10, [USR2], SA_RESTORER|SA_RESTART, 0x7f85489a50b0}, {SIG_DFL, [], 0}, 8) = 0 chdir("/var/lib/nfs") = 0 stat("/proc/fs/nfsd/threads", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0 open("/proc/fs/nfsd/portlist", O_RDONLY) = 3 read(3, {{{ about 153 seconds later - yes the read line is split by this time as shown }}} "tcp 2049\n", 128) = 9 close(3) = 0 open("/dev/null", O_RDWR) = 3 dup2(3, 0) = 0 dup2(3, 1) = 1 dup2(3, 2) = 2 open("/proc/self/fd", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4 fstat(4, {st_mode=S_IFDIR|0500, st_size=0, ...}) = 0 getdents(4, /* 7 entries */, 32768) = 168 close(3) = 0 getdents(4, /* 0 entries */, 32768) = 0 close(4) = 0 open("/proc/fs/nfsd/threads", O_WRONLY) = 3 write(3, "8\n", 2 {{{ about 193 seconds later }}} ) = 2 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++ ========== Now that it's completed, I can cat /proc/fs/nfsd/{portlist,threads} instantly. But, if I stop nfsd and try restarting it, I get the delay again. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
