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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@ -14,7 +14,9 @@ into strings. These interpolations are wrapped in `${}`, such as
The interpolation syntax is powerful and allows you to reference
variables, attributes of resources, call functions, etc.
To reference variables, use the `var.` prefix followed by the
## Available Variables
**To reference user variables**, use the `var.` prefix followed by the
variable name. For example, `${var.foo}` will interpolate the
`foo` variable value. If the variable is a mapping, then you
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
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, `${aws_instance.web.id}`
will interpolate the ID attribute from the "aws\_instance"
resource named "web".
Finally, Terraform ships with built-in functions. Functions
are called with the syntax `name(arg, arg2, ...)`. For example,
to read a file: `${file("path.txt")}`. The built-in functions
are documented below.
**To reference outputs from a module**, the syntax is
`MODULE.NAME.OUTPUT`. For example `${module.foo.bar}` will
interpolate the "bar" output from the "foo"
[module](/docs/modules/index.html).
**To reference count information**, the syntax is `count.FIELD`.
For example, `${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
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:
* `concat(args...)` - Concatenates the values of multiple arguments into

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@ -42,7 +42,9 @@ resource type in the
There are **meta-parameters** available to all resources:
* `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
resource has. These dependencies will be created before this