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PAC-MAN

11 Posts

4173

September 26th, 2016 02:00

NFS export from ECS via load balancer

We have an ECS and it is placed behind a load balancer. S3 protocol works flawlessly via the load balancer. i.e. we use only the load balancer IP address to make REST calls. The problem is with NFS exports that we have configured in ECS. Earlier we were just using one of ECS 4 node IP address to mount the shares on Linux host. After installing Load Balancer, I edited entries in /etc/fstab and changed ECS node IP to Load Balancer IP address. When I tried to mount it didn't work and the following error occurred,


clnt_create: RPC: Port mapper failure - Unable to receive: errno 111 (Connection refused)


Went back to IT and they changed something, probably added the ports in the firewall. Now I get a different error when trying to mount an NFS export,


mount.nfs: access denied by server while mounting 192.163.47.48:/namespace1/bucket1/


What can be done to resolve this error? Should I make some changes user group mapping on ECS? Could it be due to the fact that the users in User/Group mapping on ECS is not present in the load balancer?


Any help is much appreciated.

PAC-MAN

11 Posts

September 28th, 2016 00:00

Is NFS via load balancer supported by ECS?

Praveen_Reddy_01a3ae

1 Message

November 29th, 2016 23:00

Hi,

have you found any fix. we are facing the same issue  ?

Any help is much appreciated.

Thanks

benschumacher

1 Rookie

 • 

75 Posts

November 30th, 2016 07:00

Hi,

What load balancer are your attempting to use?  I a couple things to check ...

  1. TCP connections between data node and client need to be sticky.  This is a hard requirement due to the async nature of write and commit calls.
  2. The load balancer must operate in a mode such that the data nodes receive rpc calls from client IP rather than load balancer IP (to identify different clients).
  3. Load balancer needs to handle fail over of data nodes.

If you can provide the hardware/software you're using, I can give more detail on this.

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