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https://issues.apache.org/jira/browse/MESOS-8148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benno Evers reassigned MESOS-8148:
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Assignee: (was: Benno Evers)
> Enforce text attribute value specification for zone and region values
> ---------------------------------------------------------------------
>
> Key: MESOS-8148
> URL: https://issues.apache.org/jira/browse/MESOS-8148
> Project: Mesos
> Issue Type: Improvement
> Reporter: Tim Harper
> Priority: Major
>
> Mesos has a specification for characters allowed by attribute values:
> http://mesos.apache.org/documentation/latest/attributes-resources/
> The specification is as follows:
> {code}
> scalar : floatValue
> floatValue : ( intValue ( "." intValue )? ) | ...
> intValue : [0-9]+
> range : "[" rangeValue ( "," rangeValue )* "]"
> rangeValue : scalar "-" scalar
> set : "{" text ( "," text )* "}"
> text : [a-zA-Z0-9_/.-]
> {code}
> Marathon is [implementing IN and IS
> constraints|https://docs.google.com/document/d/e/2PACX-1vSFvPol0pcHC2Web7EaNU0oSDS5wrOWSgFcmuslYBtISV2NB2JZ_D-B4wpWy_Vutaf08m2LX6WZVy6s/pub],
> and includes plans to support further attribute types as it makes sense to
> do so (IE {{{a,b} IS {b,a}}}, {{5 IN [0-10]}}). In order
> to do this, Marathon has adopted the Mesos attribute value specification and
> will enforce it in the validation layer. As an example, it will be possible
> to write things like:
> {code:java}
> "constraints": [
> ["attribute", "IN", "{value-a,value-b,value-c}"]
> ]
> {code}
> Additionally, Marathon allows one to specify constraints on non-attribute
> properties, such as region, hostname, or zone. If somebody specified a zone
> value with a comma, then the user would not be able to use the Mesos set
> value type specification to describe a set of zones in which an app should be
> deployed, and, as a consequence, would result in additional complexity (IE:
> Marathon would need to implement an escaping mechanism for this case).
> Ideally, the character space is confined to begin with. It the text type
> specification is sufficient, then, it seems simpler to re-use it rather than
> create another one.
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