Fixes#1409
Resource set hash calculation is a bit of a devil's bargain when it
comes to optional, computed attributes.
If you omit the optional, computed attribute from the hash function,
changing it in an existing config is not properly detected.
If you include the optional, computed attribute in the hash and do not
specify a value for it in the config, then you'll end up with a
perpetual, unresolvable diff.
We'll need to think about how to get the best of both worlds, here, but
for now I'm switching us to the latter and documenting the fact that
changing these attributes requires manual `terraform taint` to apply.
These bugs were found by additional check added in #1443
* Reversed nil err check meant that block devices were broken :(
* Fixing the err check revealed a few missed pointer derefs
* Unlike instances, ephemeral block devices do come back in
`BlockDeviceMappings` from `DescribeLaunchConfigurations` calls, so
we need to recognize them and filter them properly. Even though
they're not set as computed, I'm doing a `d.Set` since it doesn't
hurt and it gives us the benefit of basic drift detection.
Turns out AssociatePublicIPAddress was always being set, but the AWS
APIs don't like that when you're launching into EC2 Classic and return a
validation error at ASG launch time.
Fixes#1410
These changes should fix#1367:
* `ebs_optimized` gets `Computed: true` and set from `Read`
* `ephemeral_block_device` loses `Computed: true`
* explicitly set `root_block_device` to empty from `Read`
While I was in there (tm):
* Send pointers to `d.Set` so we can use its internal nil check.
If a given resource does not define an `Update` function, then all of
its attributes must be specified as `ForceNew`, lest Applys fail with
"doesn't support update" like #1367.
This is something we can detect automatically, so this adds a check for
it when we validate provider implementations.
This allows you to set lifecycle create_before_destroy = true
and fixes#532 as then we'll make a new launch config, change
the launch config on the ASG, and *then* delete the old launch
config.
Also tried adding tests which unfortunately don't seem to fail...
Mitchell Hashimoto