Because `aws_security_group_rule` resources are an abstraction on top of
Security Groups, they must interact with the AWS Security Group APIs in
a pattern that often results in lots of parallel requests interacting
with the same security group.
We've found that this pattern can trigger race conditions resulting in
inconsistent behavior, including:
* Rules that report as created but don't actually exist on AWS's side
* Rules that show up in AWS but don't register as being created
locally, resulting in follow up attempts to authorize the rule
failing w/ Duplicate errors
Here, we introduce a per-SG mutex that must be held by any security
group before it is allowed to interact with AWS APIs. This protects the
space between `DescribeSecurityGroup` and `Authorize*` / `Revoke*`
calls, ensuring that no other rules interact with the SG during that
span.
The included test exposes the race by applying a security group with
lots of rules, which based on the dependency graph can all be handled in
parallel. This fails most of the time without the new locking behavior.
I've omitted the mutex from `Read`, since it is only called during the
Refresh walk when no changes are being made, meaning a bunch of parallel
`DescribeSecurityGroup` API calls should be consistent in that case.
This commit makes a few attributes computed so the generated information
is accessible after creation.
It also fixes the "persistence" attribute, which previously had a typo.
Finally, it converts "admin_state_up" to a Boolean to match the majority
of other attributes of the same name.
Building on the work of #3846, deprecate `filename` in favor of a
`template` attribute that accepts file contents instead of a path.
Required a bit of work in the interpolation code to prevent Terraform
from assuming that template interpolations were resource variables that
needed to be resolved. Leaving them as "Unknown Variables" prevents
interpolation from happening early and lets the `template_file` resource
do its thing.
This commit makes some quick updates to the port attributes to make them
more intuitive:
* `security_groups` to `security_group_ids`: since the port is expecting
IDs and not security group names like in other areas of OpenStack.
* `admin_state_up`: change to Boolean to match this same attribute on
other resources.
* `fixed_ips` to `fixed_ip`: while multiple `fixed_ip` blocks can be
specified, only one fixed IP can be specified in each block.
Paul Hinze