Public bug reported:

Since the change in [1] open-vm-tools-service starts very (very) early.
Not so much due to the 
Before=cloud-init-local.service
But much more by
DefaultDependencies=no

That can trigger an issue that looks like
root@ubuntuguest:~# systemctl status -l open-vm-tools.service
● open-vm-tools.service - Service for virtual machines hosted on VMware
   Loaded: loaded (/lib/systemd/system/open-vm-tools.service; enabled; vendor 
preset: enabled)
   Active: failed (Result: resources)


As it is right now open-vm-tools can race with the other early start and then 
fail.
In detail one can find a message like:
  open-vm-tools.service: Failed to run 'start' task: Read-only file system"

This is due to privtaeTmp=yes which is also set needing a writable
/var/tmp [2]

To ensure this works PrivateTmp would have to be removed (not good) or some 
after dependencies added that make this work reliably.
I added
After=local-fs.target
which made it work for me in 3/3 tests.

I' like to have an ack by the cloud-init Team that this does not totally kill 
the originally intended Before=cloud-init-local.service
I think it does not as local-fs can complete before cloud-init-local, then 
open-vm-tools can initialize and finally cloud-init-local can pick up the data.

To summarize:
# cloud-init-local #
DefaultDependencies=no
Wants=network-pre.target
After=systemd-remount-fs.service
Before=NetworkManager.service
Before=network-pre.target
Before=shutdown.target
Before=sysinit.target
Conflicts=shutdown.target
RequiresMountsFor=/var/lib/cloud

# open-vm-tools #
DefaultDependencies=no
Before=cloud-init-local.service

Proposed is to add to the latter:
After=local-fs.target

[1]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859677
[2]: https://github.com/systemd/systemd/issues/5610

** Affects: cloud-init
     Importance: Undecided
         Status: New

** Affects: open-vm-tools (Ubuntu)
     Importance: High
         Status: Triaged

** Also affects: cloud-init
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1750780

Title:
  Race with local file systems can make open-vm-tools fail to start

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