Support alternatives to /etc/fstab for configuring and mounting NFS shared directory (like autofs)

Use case: Modifying /etc/fstab is prohibited due to security restrictions on customer's environments

Possible Alternatives (currently unsupported)

• use autofs -> This is currently not recommended as Bitbucket needs constant access to the NFS shared volume, and autofs is designed for occasional access.
• use  systemd .mount unit file

Note: Currently, the supported way to configure and mount the NFS shared directory for Bitbucket DC is the following:

For example, suppose your Bitbucket home directory is /var/atlassian/application-data/bitbucket , and your shared home directory is available as an NFS export called bitbucket-san:/bitbucket-shared. To configure the mount on each cluster node:

Add the following line to /etc/fstab on each cluster node.

bitbucket-san:/bitbucket-shared /var/atlassian/application-data/bitbucket/shared nfs rw,nfsvers=3,lookupcache=pos,noatime,intr,rsize=32768,wsize=32768,_netdev 0 0

Mount the share on each node:

mkdir -p /var/atlassian/application-data/bitbucket/shared
sudo mount -a