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docs: service create: document non-matching/exclude constraints 

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit b059c93c92)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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Sebastiaan van Stijn 2020-02-10 11:16:22 +01:00
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docs/reference/commandline/service_create.md
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@ -667,7 +667,8 @@ $ docker service create \
### Specify service constraints (--constraint) ### Specify service constraints (--constraint)
You can limit the set of nodes where a task can be scheduled by defining You can limit the set of nodes where a task can be scheduled by defining
constraint expressions. Multiple constraints find nodes that satisfy every constraint expressions. Constraint expressions can either use a _match_ (`==`)
or _exclude_ (`!=`) rule. Multiple constraints find nodes that satisfy every
expression (AND match). Constraints can match node or Docker Engine labels as expression (AND match). Constraints can match node or Docker Engine labels as
follows: follows: