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db0b16b615
Add a ready plugin that allows plugin to signal when they are ready.
Once a plugin is ready it is not queried again.
This uses same mechanism as the health plugin: each plugin needs to
implement an interface.
Implement readines for the *erratic* plugin to aid in testing.
Add README.md and tests moduled after the health plugin; which will be
relegated to just providing process health. In similar vein to health
this is a process wide setting.
With this Corefile:
~~~
. {
erratic
whoami
ready
}
bla {
erratic
whoami
}
~~~
ready will lead to:
~~~ sh
% curl localhost:8181/ready
% dig @localhost -p 1053 mx example.org
% curl localhost:8181/ready
OK%
~~~
Meanwhile CoreDNS logs:
~~~
.:1053
bla.:1053
2019-02-26T20:59:07.137Z [INFO] CoreDNS-1.3.1
2019-02-26T20:59:07.137Z [INFO] linux/amd64, go1.11.4,
CoreDNS-1.3.1
linux/amd64, go1.11.4,
2019-02-26T20:59:11.415Z [INFO] plugin/ready: Still waiting on: "erratic"
2019-02-26T20:59:13.510Z [INFO] plugin/ready: Still waiting on: "erratic"
~~~
*ready* can be used in multiple server blocks and will do the right
thing; query all those plugins from all server blocks for readiness.
This does a similar thing to the prometheus plugin.
Signed-off-by: Miek Gieben <miek@miek.nl>
45 lines
1.7 KiB
Go
45 lines
1.7 KiB
Go
// generated by directives_generate.go; DO NOT EDIT
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package plugin
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import (
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// Include all plugins.
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_ "github.com/coredns/coredns/plugin/auto"
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_ "github.com/coredns/coredns/plugin/autopath"
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_ "github.com/coredns/coredns/plugin/bind"
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_ "github.com/coredns/coredns/plugin/cache"
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_ "github.com/coredns/coredns/plugin/chaos"
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_ "github.com/coredns/coredns/plugin/debug"
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_ "github.com/coredns/coredns/plugin/dnssec"
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_ "github.com/coredns/coredns/plugin/dnstap"
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_ "github.com/coredns/coredns/plugin/erratic"
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_ "github.com/coredns/coredns/plugin/errors"
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_ "github.com/coredns/coredns/plugin/etcd"
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_ "github.com/coredns/coredns/plugin/federation"
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_ "github.com/coredns/coredns/plugin/file"
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_ "github.com/coredns/coredns/plugin/forward"
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_ "github.com/coredns/coredns/plugin/health"
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_ "github.com/coredns/coredns/plugin/hosts"
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_ "github.com/coredns/coredns/plugin/k8s_external"
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_ "github.com/coredns/coredns/plugin/kubernetes"
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_ "github.com/coredns/coredns/plugin/loadbalance"
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_ "github.com/coredns/coredns/plugin/log"
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_ "github.com/coredns/coredns/plugin/loop"
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_ "github.com/coredns/coredns/plugin/metadata"
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_ "github.com/coredns/coredns/plugin/metrics"
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_ "github.com/coredns/coredns/plugin/nsid"
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_ "github.com/coredns/coredns/plugin/pprof"
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_ "github.com/coredns/coredns/plugin/ready"
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_ "github.com/coredns/coredns/plugin/reload"
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_ "github.com/coredns/coredns/plugin/rewrite"
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_ "github.com/coredns/coredns/plugin/root"
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_ "github.com/coredns/coredns/plugin/route53"
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_ "github.com/coredns/coredns/plugin/secondary"
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_ "github.com/coredns/coredns/plugin/template"
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_ "github.com/coredns/coredns/plugin/tls"
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_ "github.com/coredns/coredns/plugin/trace"
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_ "github.com/coredns/coredns/plugin/whoami"
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_ "github.com/coredns/proxy"
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_ "github.com/mholt/caddy/onevent"
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)
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