If external-dns.alpha.kubernetes.io/target annotation is present on a
pod, it's value will be used as the target for the headless service.
If annotation external-dns.alpha.kubernetes.io/access=public is present,
NodeExternalIP of the node running the pod is used as the target for the
headless service.
In its current state, ttlMaximum causes make to fail build with error:
source/source.go:71:39: constant 4294967295 overflows int
Because math.MaxUint32 is an untyped integer constant it is converted
to type int when used as an interface param, type int is signed,
MaxUint32 is larger than MaxInt32 and causes the type int to overflow.
Converting ttlMaximum to MaxInt32 stops this overflow.
* add Istio Gateway Source
* add documentation for Istio Gateway Source
* make both istio namespace and ingress gateway service configurable
* prefix gateway types, constructors, and flags with 'istio-'
* fix: add missing sources to source flag docs
* Add RecordTTL
* Route53: test for custom TTL
* Fix tests
* Fix remaining tests
* Add ttl when endpoint is created from ingress
* Missed a word
* Fix bad refactoring
* Add ingress custom TTL test
* gofmt
* Satisfy go-lint
* Unshadow `endpoint` in azure provider
* Fix and add an output test
* Add TTL for endpoints generated from service templates
* Take TTL into account when generating update plan
* Tests for TTL change impact on the plan
* Refactor factory method name
* Refactoring
* Run gofmt
* Make endpoint string format look like BIND config
* Update plan and plan_test
* Replace NewEndpointWithTTLValue with NewEndpointWithTTL in aws
* Remove NewEndpointWithTTLValue func
* Update references to TTL
* Remove getTTLValue func
* Handle merge conflict
* Update tests
* Update README, CHANGELOG and documentation
* Run gofmt
* Move getTTLFromAnnotations to a common file
* Refactor getTTLFromAnnotations
* Gofmt
* Add tests for getTTLFromAnnotations
* Trigger build
* Add boilerplate header
* Update README/CHANGELOG according to code review
* Add ttl.md and link it from README
* change CNAME string to endpoint.RecordTypeCNAME
* fix test cases with AWS ALIAS records, these do not behave different in these tests
