Trying to establish an NFS mount between some openstack instances, using this ansible playbook. All Ubuntu, server is 16.04, 4.4.0, clients are 18.04, 4.15.0. I have set the security groups to be able to see ports 111 and 2049.
- 192.168.20.2 - my server
- 192.168.20.3 - a client
UFW is inactive on all machines. Already ran sudo exportfs -av -> exporting 192.168.20.1/24:/nfs
exportfs -> /nfs 192.168.20.1/24
nfsd is running. On the server, I can sudo mount 192.168.20.2:/nfs /tmp/nfs, works fine. I can rpcinfo -p 192.168.20.2:
100000 4 tcp 111 portmapper
...
100000 2 udp 111 portmapper
100024 1 udp 58520 status
100024 1 tcp 42380 status
100021 1 udp 60054 nlockmgr
....
100005 1 udp 35035 mountd
...
100005 3 tcp 41256 mountd
...
100003 4 udp 2049 nfs
(omitted some version variants to save space)
Client can nmap the server:
PORT STATE SERVICE
111/tcp open rpcbind
2049/tcp open nfs
Server can nmap the client (I expect nfs to be closed, right?)
PORT STATE SERVICE
111/tcp open rpcbind
2049/tcp closed nfs
I can telnet all the appropriate ports.
On the client, I can't mount, showmount -e, or rpcinfo -p 192.168.20.2.
192.168.20.52: RPC: Port mapper failure - Timed out
I have tried:
- service rpcbind restart
- service portmap restart
- service nfs-server restart
I just tried running the 18.04 as the server, 16.04 as the client. Works! Why won't it work the other way?
edit: So I re-provisioned some things, servers are all 18.04 now, and now showmount hangs on everything. I've soft-rebooted both client and server. I have another 16.04 client, that's also freezing. Here's the list of rfs-related services:
systemctl list-units --all | grep -Pi -e '(nfs|rpc)'
● mnt-nfs.mount loaded failed failed /mnt/nfs
● nfs.mount loaded failed failed /nfs
proc-fs-nfsd.mount loaded active mounted NFSD configuration filesystem
run-rpc_pipefs.mount loaded active mounted RPC Pipe File System
auth-rpcgss-module.service loaded inactive dead Kernel Module supporting RPCSEC_GSS
nfs-blkmap.service loaded active running pNFS block layout mapping daemon
nfs-config.service loaded inactive dead Preprocess NFS configuration
nfs-idmapd.service loaded active running NFSv4 ID-name mapping service
nfs-mountd.service loaded active running NFS Mount Daemon
nfs-server.service loaded active exited NFS server and services
nfs-utils.service loaded inactive dead NFS server and client services
rpc-gssd.service loaded inactive dead RPC security service for NFS client and server
rpc-statd-notify.service loaded inactive dead Notify NFS peers of a restart
rpc-statd.service loaded active running NFS status monitor for NFSv2/3 locking.
rpc-svcgssd.service loaded inactive dead RPC security service for NFS server
rpcbind.service loaded active running RPC bind portmap service
rpcbind.socket loaded active running RPCbind Server Activation Socket
nfs-client.target loaded active active NFS client services
rpcbind.target loaded active active RPC Port Mapper
