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providers/aws: fix source_dest_check on instance creation

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The `SourceDestCheck` attribute can only be changed via
`ModifyInstance`, so the AWS instance resource's `Create` function calls
out to `Update` before it returns to take care of applying
`source_dest_check` properly.

The `Update` function originally guarded against unnecessary API calls
with `GetOk`, which worked fine until #993 when we changed the `GetOk`
semantics to no longer distinguish between "configured and zero-value"
and "not configured".

I attempted in #1003 to fix this by switching to `HasChange` for the
guard, but this does not work in the `Create` case.

I played around with a few different ideas, none of which worked:

(a) Setting `Default: true` on `source_dest_check' has no effect

(b) Setting `Computed: true` on `source_dest_check' and adding a `d.Set`
    call in the `Read` function (which will initially set the value to `true`
    after instance creation). I really thought I could get this to work,
    but it results in the following:

```go
d.Get('source_dest_check')       // true
d.HasChange('source_dest_check') // false
d.GetChange('source_dest_check') // old: false, new: false
```

I couldn't figure out a way of coherently dealing with that result, so I
ended up throwing up my hands and giving up on the guard altogether.
We'll call `ModifyInstance` more than we have to, but this at least
yields expected behavior for both Creates and Updates.

Fixes #1020
This commit is contained in:
Paul Hinze 2015-02-21 14:26:46 -06:00
parent 751822b53f
commit 473b03ccae
2 changed files with 20 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
builtin/providers/aws/resource_aws_instance.go
View File

@ -487,25 +487,18 @@ func resourceAwsInstanceRead(d *schema.ResourceData, meta interface{}) error {
func resourceAwsInstanceUpdate(d *schema.ResourceData, meta interface{}) error {
ec2conn := meta.(*AWSClient).ec2conn
modify := false
opts := new(ec2.ModifyInstance)
if d.HasChange("source_dest_check") {
opts.SetSourceDestCheck = true
opts.SourceDestCheck = d.Get("source_dest_check").(bool)
modify = true
opts.SetSourceDestCheck = true
opts.SourceDestCheck = d.Get("source_dest_check").(bool)
log.Printf("[INFO] Modifying instance %s: %#v", d.Id(), opts)
if _, err := ec2conn.ModifyInstance(d.Id(), opts); err != nil {
return err
}
if modify {
log.Printf("[INFO] Modifying instance %s: %#v", d.Id(), opts)
if _, err := ec2conn.ModifyInstance(d.Id(), opts); err != nil {
return err
}
// TODO(mitchellh): wait for the attributes we modified to
// persist the change...
}
// TODO(mitchellh): wait for the attributes we modified to
// persist the change...
if err := setTags(ec2conn, d); err != nil {
return err

18
builtin/providers/aws/resource_aws_instance_test.go
View File

@ -145,10 +145,17 @@ func TestAccAWSInstance_sourceDestCheck(t *testing.T) {
CheckDestroy: testAccCheckInstanceDestroy,
Steps: []resource.TestStep{
resource.TestStep{
Config: testAccInstanceConfigSourceDest,
Config: testAccInstanceConfigSourceDestDisable,
Check: resource.ComposeTestCheckFunc(
testAccCheckInstanceExists(
"aws_instance.foo", &v),
testAccCheckInstanceExists("aws_instance.foo", &v),
testCheck(false),
),
},
resource.TestStep{
Config: testAccInstanceConfigSourceDestEnable,
Check: resource.ComposeTestCheckFunc(
testAccCheckInstanceExists("aws_instance.foo", &v),
testCheck(true),
),
},
@ -156,8 +163,7 @@ func TestAccAWSInstance_sourceDestCheck(t *testing.T) {
resource.TestStep{
Config: testAccInstanceConfigSourceDestDisable,
Check: resource.ComposeTestCheckFunc(
testAccCheckInstanceExists(
"aws_instance.foo", &v),
testAccCheckInstanceExists("aws_instance.foo", &v),
testCheck(false),
),
},
@ -388,7 +394,7 @@ resource "aws_instance" "foo" {
}
`
const testAccInstanceConfigSourceDest = `
const testAccInstanceConfigSourceDestEnable = `
resource "aws_vpc" "foo" {
cidr_block = "10.1.0.0/16"
}