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website: update docs for count.index

This commit is contained in:
Mitchell Hashimoto 2014-10-02 22:11:53 -07:00
parent 88ac1b030a
commit 55ab043036
2 changed files with 21 additions and 7 deletions
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24
website/source/docs/configuration/interpolation.html.md
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@ -14,7 +14,9 @@ into strings. These interpolations are wrapped in `${}`, such as
The interpolation syntax is powerful and allows you to reference The interpolation syntax is powerful and allows you to reference
variables, attributes of resources, call functions, etc. variables, attributes of resources, call functions, etc.
To reference variables, use the `var.` prefix followed by the ## Available Variables
**To reference user variables**, use the `var.` prefix followed by the
variable name. For example, `${var.foo}` will interpolate the variable name. For example, `${var.foo}` will interpolate the
`foo` variable value. If the variable is a mapping, then you `foo` variable value. If the variable is a mapping, then you
can reference static keys in the map with the syntax can reference static keys in the map with the syntax
@ -22,18 +24,28 @@ can reference static keys in the map with the syntax
get the value of the `us-east-1` key within the `amis` variable get the value of the `us-east-1` key within the `amis` variable
that is a mapping. that is a mapping.
To reference attributes of other resources, the syntax is **To reference attributes of other resources**, the syntax is
`TYPE.NAME.ATTRIBUTE`. For example, `${aws_instance.web.id}` `TYPE.NAME.ATTRIBUTE`. For example, `${aws_instance.web.id}`
will interpolate the ID attribute from the "aws\_instance" will interpolate the ID attribute from the "aws\_instance"
resource named "web". resource named "web".
Finally, Terraform ships with built-in functions. Functions **To reference outputs from a module**, the syntax is
are called with the syntax `name(arg, arg2, ...)`. For example, `MODULE.NAME.OUTPUT`. For example `${module.foo.bar}` will
to read a file: `${file("path.txt")}`. The built-in functions interpolate the "bar" output from the "foo"
are documented below. [module](/docs/modules/index.html).
**To reference count information**, the syntax is `count.FIELD`.
For example, `${count.index}` will interpolate the current index
in a multi-count resource. For more information on count, see the
resource configuration page.
## Built-in Functions ## Built-in Functions
Terraform ships with built-in functions. Functions are called with
the syntax `name(arg, arg2, ...)`. For example,
to read a file: `${file("path.txt")}`. The built-in functions
are documented below.
The supported built-in functions are: The supported built-in functions are:
* `concat(args...)` - Concatenates the values of multiple arguments into * `concat(args...)` - Concatenates the values of multiple arguments into

4
website/source/docs/configuration/resources.html.md
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@ -42,7 +42,9 @@ resource type in the
There are **meta-parameters** available to all resources: There are **meta-parameters** available to all resources:
* `count` (int) - The number of identical resources to create. * `count` (int) - The number of identical resources to create.
This doesn't apply to all resources. This doesn't apply to all resources. You can use the `${count.index}`
[interpolation](/docs/configuration/interpolation.html) to reference
the current count index in your resource.
* `depends_on` (list of strings) - Explicit dependencies that this * `depends_on` (list of strings) - Explicit dependencies that this
resource has. These dependencies will be created before this resource has. These dependencies will be created before this