DX OI: Pods does not running by “Failed Mount” error

Products

• DX Operational Intelligence

Issue/Introduction

Many Pods fail to start with the following error:

MountVolume.SetUp failed for volume <Volume name>: mount failed: exit status 32 Mounting command:

mount.nfs: No route to host

Cause

This means the machine that you are connecting from is not getting a TCP/IP ACK back from the server.
Almost this is a firewall issue.

Environment

DX Operational Intelligence: 1.3.x
OpenShift: 3.x

Resolution

The following ports are required to open for NFSv4.
port 20048 (mountd), 2049 (nfs)  and 111 (portmapper)

# systemctl restart iptables
# iptables -I INPUT 1 -p tcp --dport <port> -j ACCEPT
# systemctl restart nfs