From RFC 1034 ...
Wildcard RRs do not apply:
[...]
When the query name or a name between the wildcard domain and
the query name is know to exist. For example, if a wildcard
RR has an owner name of "*.X", and the zone also contains RRs
attached to B.X, the wildcards would apply to queries for name
Z.X (presuming there is no explicit information for Z.X), but
not to B.X, A.B.X, or X.
Signed-off-by: xuweiwei <xuweiwei_yewu@cmss.chinamobile.com>
* Add forwardcrd plugin README.md
Co-authored-by: Aidan Obley <aobley@vmware.com>
Signed-off-by: Christian Ang <angc@vmware.com>
* Create forwardcrd plugin
- Place forwardcrd before forward plugin in plugin list. This will avoid
forward from preventing the forwardcrd plugin from handling any queries
in the case of having a default upstream forwarder in a server block (as
is the case in the default kubernetes Corefile).
Co-authored-by: Aidan Obley <aobley@vmware.com>
Signed-off-by: Christian Ang <angc@vmware.com>
* Add Forward CRD
Signed-off-by: Christian Ang <angc@vmware.com>
* Add NewWithConfig to forward plugin
- allows external packages to instanciate forward plugins
Co-authored-by: Aidan Obley <aobley@vmware.com>
Signed-off-by: Christian Ang <angc@vmware.com>
* ForwardCRD plugin handles requests for Forward CRs
- add a Kubernetes controller that can read Forward CRs
- instances of the forward plugin are created based on Forward CRs from
the Kubernetes controller
- DNS requests are handled by calling matching Forward plugin instances
based on zone name
- Defaults to the kube-system namespace to align with Corefile RBAC
Signed-off-by: Christian Ang <angc@vmware.com>
Use klog v2 in forwardcrd plugin
* Refactor forward setup to use NewWithConfig
Co-authored-by: Christian Ang <angc@vmware.com>
Signed-off-by: Edwin Xie <exie@vmware.com>
* Use ParseInt instead of Atoi
- to ensure that the bitsize is 32 for later casting to uint32
Signed-off-by: Christian Ang <angc@vmware.com>
* Add @christianang to CODEOWNERS for forwardcrd
Signed-off-by: Christian Ang <angc@vmware.com>
Co-authored-by: Edwin Xie <exie@vmware.com>
* Metrics: expand coredns_dns_responses_total with plugin label
This adds (somewhat hacky?) code to add a plugin label to the
coredns_dns_responses_total metric. It's completely obvlious to the
plugin as we just check who called the *recorder.WriteMsg method. We use
runtime.Caller( 1 2 3) to get multiple levels of callers, this should be
deep enough, but it depends on the dns.ResponseWriter wrapping that's
occuring.
README.md of metrics updates and test added in test/metrics_test.go to
check for the label being set.
I went through the plugin to see what metrics could be removed, but
actually didn't find any, the plugin push out metrics that make sense.
Due to the path fiddling to figure out the plugin name I doubt this
works (out-of-the-box) for external plugins, but I haven't tested that.
Signed-off-by: Miek Gieben <miek@miek.nl>
* better comment
Signed-off-by: Miek Gieben <miek@miek.nl>
* Metrics: expand coredns_dns_responses_total with plugin label
This adds (somewhat hacky?) code to add a plugin label to the
coredns_dns_responses_total metric. It's completely obvlious to the
plugin as we just check who called the *recorder.WriteMsg method. We use
runtime.Caller( 1 2 3) to get multiple levels of callers, this should be
deep enough, but it depends on the dns.ResponseWriter wrapping that's
occuring.
README.md of metrics updates and test added in test/metrics_test.go to
check for the label being set.
I went through the plugin to see what metrics could be removed, but
actually didn't find any, the plugin push out metrics that make sense.
Due to the path fiddling to figure out the plugin name I doubt this
works (out-of-the-box) for external plugins, but I haven't tested that.
Signed-off-by: Miek Gieben <miek@miek.nl>
* Update core/dnsserver/server.go
Co-authored-by: dilyevsky <ilyevsky@gmail.com>
* Use [3]string
Signed-off-by: Miek Gieben <miek@miek.nl>
* imports
Signed-off-by: Miek Gieben <miek@miek.nl>
* remove dnstest changes
Signed-off-by: Miek Gieben <miek@miek.nl>
* revert
Signed-off-by: Miek Gieben <miek@miek.nl>
* Add some sleeps to make it less flaky
Signed-off-by: Miek Gieben <miek@miek.nl>
* Revert "Add some sleeps to make it less flaky"
This reverts commit b5c6655196.
* Remove forward when not needed
Signed-off-by: Miek Gieben <miek@miek.nl>
* remove newline
Signed-off-by: Miek Gieben <miek@miek.nl>
Co-authored-by: dilyevsky <ilyevsky@gmail.com>
* write cname answer to client even if target lookup is servfail
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
* fix existing unit test expectations
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>
* upstream lookups are done with original EDNS options
Signed-off-by: Ondřej Benkovský <ondrej.benkovsky@jamf.com>
* fixup! upstream lookups are done with original EDNS options
Signed-off-by: Ondřej Benkovský <ondrej.benkovsky@jamf.com>
Add a total cache request counter to follow Prometheus conventions[0].
Mark the existing cache miss metric as deprecated.
> Similarly, with hit or miss for caches, it’s better to have one
> metric for total and another for hits.
[0]: https://prometheus.io/docs/instrumenting/writing_exporters/#naming
Signed-off-by: SuperQ <superq@gmail.com>
* Use GetByKey instead of List in GetNamespaceByName.
* Add ToNamespace to reduce memory for namespace cache.
Signed-off-by: Mat Lowery <mlowery@ebay.com>
