To combat label cardinality explosions remove the type from metrics.
This was most severe in the histogram for request duration, remove it
there.
It's also highlighted difference between grpc and forward code, where
forward did use type and grpc didn't; getting rid of all that "fixes"
that discrepancy
Move monitor.go back into the vars directory and make it private again.
Also name it slightly better
Fixes: #4507
Signed-off-by: Miek Gieben <miek@miek.nl>
* plugin/forward Add rcode and rtype to request_duration_seconds metric
Signed-off-by: Maxime Ginters <maxime.ginters@shopify.com>
* Control the cardinality of query type
Signed-off-by: Maxime Ginters <maxime.ginters@shopify.com>
* plugin/kubernetes: remove bunch a string ops
This removes a bunch of appends to where not needed, makes dnsutil.Join
take variadic args which removes the need to wrap in a new string slice.
Signed-off-by: Miek Gieben <miek@miek.nl>
* Fix calls to dnsutil.Join
Signed-off-by: Miek Gieben <miek@miek.nl>
* Revert these
Signed-off-by: Miek Gieben <miek@miek.nl>
* Move functions from pkg/transport to pkg/parse
Although "parse" is a fairly generic name I believe this is somewhat
better named. pkg/transport keeps a few constants that are uses
throughout for the rest is is renaming a bunch (and the fallout from
there to make things compile again).
Signed-off-by: Miek Gieben <miek@miek.nl>
* Fix tests
Signed-off-by: Miek Gieben <miek@miek.nl>
Create plugin/pkg/transport that holds the transport related functions.
This needed to be a new pkg to prevent cyclic import errors.
This cleans up a bunch of duplicated code in core/dnsserver that also
tried to parse a transport (now all done in transport.Parse).
Signed-off-by: Miek Gieben <miek@miek.nl>
* Fix max-age in http server
Move the minMsgTTL to dnsutil and rename it MinimalTTL, move some
constants there as well.
Use these new function in server_https to correctly set the max-age
HTTP header.
Fixes: #1823
* Linter
Remove the code and remove the call in etcd and kubernetes handlers.
This does mean we should not add dups in the first place, which means
adding maps in backend_lookup to prevent dups from begin added.
This should cut down on the allocations because dnsutil.Dedup is very
expensive by converting everything to strings, we avoid doing that now.
Rename the constants to IP4arpa and IP6arpa (shorter and exported) and
make IsReverse return the type of the reverse zone which could be handy
for some callers.
Also add tests for IsReverse()
* core: allow all CIDR ranges in zone specifications
Allow (e.g.) a v4 reverse on a /17. If a zone is specified in such a
way a FilterFunc is set in the config. This filter is checked against
incoming queries.
For all other queries this adds a 'x != nil' check which will not impact
performace too much. Benchmark function is added as well to check for
this as wel.
Add multiple tests in tests/server_reverse_test.go.
Benchmark shows in the non-reverse case this hardly impact the speed:
~~~
classless:
pkg: github.com/coredns/coredns/core/dnsserver
BenchmarkCoreServeDNS-4 1000000 1431 ns/op 16 B/op 1 allocs/op
pkg: github.com/coredns/coredns/core/dnsserver
BenchmarkCoreServeDNS-4 1000000 1429 ns/op 16 B/op 1 allocs/op
master:
pkg: github.com/coredns/coredns/core/dnsserver
BenchmarkCoreServeDNS-4 1000000 1412 ns/op 16 B/op 1 allocs/op
pkg: github.com/coredns/coredns/core/dnsserver
BenchmarkCoreServeDNS-4 1000000 1429 ns/op 16 B/op 1 allocs/op
~~~
* README.md updates
* Rename middleware to plugin
first pass; mostly used 'sed', few spots where I manually changed
text.
This still builds a coredns binary.
* fmt error
* Rename AddMiddleware to AddPlugin
* Readd AddMiddleware to remain backwards compat
