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Merge pull request #25069 from hashicorp/jbardin/depends-on-docs 

depends_on doc updates
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James Bardin 2020-05-29 16:50:39 -04:00 committed by GitHub
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14
website/docs/configuration/data-sources.html.md
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@ -114,18 +114,8 @@ operation, and is re-calculated each time a new plan is created.
Data resources have the same dependency resolution behavior
[as defined for managed resources](./resources.html#resource-dependencies).
In particular, the `depends_on` meta-argument is also available within `data`
blocks, with the same meaning and syntax as in `resource` blocks.
However, due to the data resource behavior of deferring the read until the
apply phase when depending on values that are not yet known, using `depends_on`
with data resources will force the read to _always_ be deferred to the apply
phase, and therefore a configuration that uses `depends_on` with a data
resource can never converge.
Due to this behavior, we do not recommend using `depends_on` with data
resources.
Setting the `depends_on` meta-argument within `data` blocks defers reading of
the data source until after all changes to the dependencies have been applied.
## Multiple Resource Instances

10
website/docs/configuration/modules.html.md
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@ -158,9 +158,13 @@ described in more detail in other sections:
If not specified, the child module inherits all of the default (un-aliased)
provider configurations from the calling module.
In addition to the above, the argument names `depends_on` and
`lifecycle` are not currently used by Terraform but are reserved for planned
future features.
* `depends_on` - (Optional) Create explicit dependencies between the entire
module and the listed targets. This will delay the final evaluation of the
module, and any sub-modules, until after the dependencies have been applied.
Modules have the same dependency resolution behavior [as defined for managed resources](./resources.html#resource-dependencies).
In addition to the above, the `lifecycle` argument is not currently used by
Terraform but is reserved for planned future features.
Since modules are a complex feature in their own right, further detail
about how modules can be used, created, and published is included in