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[Launchpad Bug Tracker <1673255@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug by Dan Streetman (ddstreet):

The drbd udev rule creates multiple symlinks with a single udev rule, by space-separating them inside an env var.  However, recent udev changes no longer allow doing that:
https://github.com/systemd/systemd/issues/4833

Now, recent versions of udev will, by default, replace any whitespace
introduced into SYMLINK values by variable substitution, so the drbd
udev rule that does this breaks:

ENV{SYMLINK}!="", SYMLINK="$env{SYMLINK}", GOTO="have_symlink"

when that SYMLINK env variable contains multiple symlinks, they are
combined into a single symlink with an underscore joining them.
Instead, since it's desired to leave all spaces in the env var in order
to create multiple symlinks, the rule needs to use the
"string_escape=none" option which prevents whitespace replacement:

ENV{SYMLINK}!="", SYMLINK="$env{SYMLINK}",
OPTIONS+="string_escape=none", GOTO="have_symlink"


Related ubuntu bug that introduced the new udev default whitespace replacement behavior:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1647485

** Affects: drbd-utils (Ubuntu)
     Importance: Low
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress

** Affects: drbd-utils (Ubuntu Trusty)
     Importance: Low
     Assignee: Dan Streetman (ddstreet)
         Status: Invalid

** Affects: drbd-utils (Ubuntu Xenial)
     Importance: Low
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress

** Affects: drbd-utils (Ubuntu Artful)
     Importance: Low
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress

** Affects: drbd-utils (Ubuntu Bionic)
     Importance: Low
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress

** Affects: drbd-utils (Ubuntu Cosmic)
     Importance: Low
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress

** Affects: drbd-utils (Debian)
     Importance: Unknown
         Status: Unknown

-- 
drbd udev rule with multiple symlinks fails
https://bugs.launchpad.net/bugs/1673255
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