How can I run a service before network filesystems get mounted?

Solution Verified - Updated -

Issue

  • I need to have a service start before network filesystems are processed

  • My NFS mounts fail sometimes at boot with the following error message

    mount[XXX]: mount.nfs: Failed to resolve server <my-nfs-server>: Name or service not known

  • My network filesystems need to be mounted as non-local user or group ids using 3rd-party authentication service (e.g. centrifydc)

  • My network filesystems rely on a local DNS service, hence the local DNS service must be started before mounts are performed

Environment

  • Red Hat Enterprise Linux (RHEL) 7 and later
    • systemd
    • remote filesystems in /etc/fstab
    • 3rd party authentication service or local DNS cache

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