Define two consts Pod and Svc, makes it stand out a little more
when used in switches in case.
We have opted for a new type, but then you need to convert them
all the time with string(Foo).
* Treat absence of port/service in SRV as wildcard
Normally, a SRV-request should have the form
_<service>._<port>.<name>.<zone>. The k8s peer-finder which is used for
bootstrapping by some applications will however query for SRV at
<name>.<zone>.
To compensate for this behaviour, treat the absence of _<service> and
_<port> as wildcards.
* Modified tests with new SRV behaviour
Added a testcase for a SRV request without port & service
Removed now valid query from invalidSRVQueries
* Forgot to run gofmt on test/kubernetes_test.go
Drop the interfaceAddr interfaces and just use a function. Cleanup
all fallout from that. Remove the use of global variables and cleanup
the tests a bit.
Don't hold on to the *first* wildcard you'll find, but keep searching,
there may be one even deeper in the tree.
Also add multi level wildcard test
Fixes#776
* hosts middleware should return NoError if other records exist in the zone
* return RcodeSuccess for hosts queries for non A,AAAA records if the zone exists
* return NXDOMAIN instead of REFUSED when zone is not found
* Add unit tests & cnames
* more progress
* fix
* next mw dependent unit tests
* add tests for OnNXDOMAIN
* Add AAAA and ndots unit tests; fix request.NewWithQuestion
* Correct default value in README
* add CNAMEs to readme
* review
* fix autopath examples
* fix and test CNAME response order
* add wildcard parameter to allow resolving multiple name to the same IP
* first test for the reverse wildcard middleware
* update wildcard keyword test to pass code coverage
* rewrite readme
* remove breaks
* missed a break
* nits
* show options as optional
* add note to pods insecure
* add minimal configuration example.
* add a note about replacing kube-dns in the summary
* move deployment section into summary.
* Update README.md
* replace options sections with bullets
and indent all sub sections to match bullet indentation.
not sure if this will render in github properly - it doesn't in the in-line editor preview.
* fix indentation
Contrary to various on-line guides and editors, github now requires 2 spaces to indent paragraphs with bulleted sections above (not just 1).
* Update README.md
* Update README.md
* Update README.md
* fix label syntax
It's just a single EXPRESSION. The EXPRESSION itself has its own kubernetes label expression format.
* Update README.md
* Update README.md
* Switches out Unhealthy bool for OkUntil timestamp
* Make sure servers are healthy forever if there are no health checks
* Moves health check off into a go routine to avoid blocking conditions
* Improved logging info
* Fixes initial date
* Fixes health checking; alters tests to adapt to async health checking
* Moves future variable into static upstream and populates it in more places
* Restores silencing of stdout during testing
* Restores silencing of stdout during testing
* keeps check url string once built
* Removes debug message
* uses zero value to signal no checking; reduces in-mutex code to a fetch
While adding a parallel performance benchmark I stumbled on a race
condition (another reason to add performance benchmarks!), so this
PR makes sure the msg is created in a race free manor and adds the
parallel benchmark.
Fix transferring the zone from a master and the matching of notifies
to source and dst IP addresses.
Add `upstream` keyword as well, because it is needed for the same
reasons as in the *file* middlware.
Add some dire warning about upstream in the readme of both middlewares.
Out of band testing, hidden by net build tag was added. Integration
testing still needs to be setup.
Cant' transfer zone from masters without populating `f`.
This error prevents secondary zones recognized as "true" secondary, so secondary setting never worked.
* cleanup: go vet and golint run
Various cleanups trickered by go vet and golint.
* Fix tests and lowercase all errors
Lowercase all errors, some tests in kubernetes use errors from
kubernetes which do start with a capital letter.
* middleware/debug: add
Add a debug "middleware" that disables the recover() and just lets
CoreDNS crash; very useful for testing.
Fixes ##563
* fix test
* Feedback: check the value of Debug
* cache: add sharded cache implementation
Add Cache impl and a few tests. This cache is 256-way sharded, mainly
so each shard has it's own lock. The main cache structure is a readonly
jump plane into the right shard.
This should remove the single lock contention on the main lock and
provide more concurrent throughput - Obviously this hasn't been tested
or measured.
The key into the cache was made a uint32 (hash.fnv) and the hashing op
is not using strings.ToLower anymore remove any GC in that code path.
* here too
* Minimum shard size
* typos
* blurp
* small cleanups no defer
* typo
* Add freq based on Johns idea
* cherry-pick conflict resolv
* typo
* update from early code review from john
* add prefetch to the cache
* mw/cache: add prefetch
* remove println
* remove comment
* Fix tests
* Test prefetch in setup
* Add start of cache
* try add diff cache options
* Add hacky testcase
* not needed
* allow the use of a percentage for prefetch
If the TTL falls below xx% do a prefetch, if the record was popular.
Some other fixes and correctly prefetch only popular records.
* add hosts middleware
* forgot pointer receiver
* add appropriately modified hostsfile tests from golang repo
* remove test artifacts, separate hostsfile parsing from caching and opening, remove unused metrics references, move middleware up the chain
* refactored the logic for creating records and filtering ip address versions. also got PTR lookups working
* Add README.md. Modify config to be more concise. Add zones list to config. Filter PTR responses based on zones list.
* add Fallthrough and return correct dns response code otherwise
* Simplified Hostsfile to only store hosts in the zones we care about, and by ip version. Added handler tests and improved other tests.
* oops, goimports loaded a package from a different repo
* middleware/file: don't reload zone when SOA isn't changed
Give Parse an extra argument which is the SOA's serial, if > 0 we check
against the just parsed SOA and then just return.
Most notable use is in reload.go which is both used in the file and auto
middleware.
Fixes#415
* PR comments
Singleinflight interferes with the health checking of upstream. If an
upstream would fail, singleinflight would mirror that error to to other
proxy *iff* multple identical queries would be inflight. This would lead
to marking *all* upstreams as bad, essentially collapsing multiple
upstreams into a SPOF. Clearly not what we want.
Singleinflight does have some nice properties, but I've opted to rip it
out entirely. Caching should almost (but not quite) as good.
Added a test case in test that uses 3 CoreDNS instances to reflect the
setup from #715.
Found another bug as well, where (when the policy would be nil), we
would always Spray even though we've found a healthy host.
