This reworks the template lifecycle a bit such that we get nicer diff
behavior.
First, we tick ForceNew on for both filename and vars, so that the diff
indicates that the template will be "replaced" on change. This is mostly
cosmetic, but it also tracks conceptually with the fact that the
identifier we use is a hash of the contents, so any change essentially
makes a "new resource".
Second, we change the Exists implementation to only return `false` when
there has been a change in the rendered template. This lets descendent
resources see the computed value changing so that they'll properly
trigger in the plan.
Fixes#1898
Refs #1866 (but does not fix, there's another deeper issue there)
* ctiwald/ct/fix-protocol-problem:
aws: Document the odd protocol = "-1" behavior in security groups.
aws: Fixup structure_test to handle new expandIPPerms behavior.
aws: Add security group acceptance tests for protocol -1 fixes.
aws: error on expndIPPerms(...) if our ports and protocol conflict.
Users can input a limited number of protocol names (e.g. "tcp") as
inputs to network ACL rules, but the API only supports valid protocol
number:
http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
Preserve the convenience of protocol names and simultaneously support
numbers by only writing numbers to the state file. Also use numbers
when hashing the rules, to keep everything consistent.
AWS will accept any overly-specific IP/mask combination, such as
10.1.2.2/24, but will store it by its implied network: 10.1.2.0/24.
This results in hashing errors, because the remote API will return
hashing results out of sync with the local configuration file.
Enforce a stricter API rule than AWS. Force users to use valid masks,
and run a quick calculation on their input to discover their intent.
AWS doesn't store ports for -1 protocol rules, thus the read from the
API will always come up with a different hash. Force the user to make a
deliberate port choice when enabling -1 protocol rules. All from_port
and to_port's on these rules must be 0.
AWS includes default rules with all network ACL resources which cannot
be modified by the user. Don't attempt to store them locally or change
them remotely if they are already stored -- it'll consistently result
in hashing problems.
resourceAwsNetworkAclRead swallowed these errors resulting in rules
that never properly updated. Implement an entry-to-maplist function
that'll allow us to write something that Set knows how to read.
Radek Simko