219bfd0493
* middleware/metrics: add more metrics middleware/cache: Add metrics for number of elements in the cache. Also export the total size. Update README to detail the new metrics. middleware/metrics Move metrics into subpackage called "vars". This breaks the import cycle and is cleaner. This allows vars.Report to be used in the the dnsserver to log refused queries. middleware/metrics: tests Add tests to the metrics framework. The metrics/test subpackage allows scraping of the local server. Do a few test scrape of the metrics that are defined in the metrics middleware. This also allows metrics integration tests to check if the caching and dnssec middleware export their metrics correctly. * update README * typos * fix tests
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
package dnsserver
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import (
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"github.com/miekg/coredns/middleware"
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"github.com/mholt/caddy"
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)
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// Config configuration for a single server.
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type Config struct {
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// The zone of the site.
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Zone string
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// The hostname to bind listener to, defaults to the wildcard address
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ListenHost string
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// The port to listen on.
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Port string
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// Root points to a base directory we we find user defined "things".
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// First consumer is the file middleware to looks for zone files in this place.
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Root string
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// Middleware stack.
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Middleware []middleware.Middleware
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// Compiled middleware stack.
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middlewareChain middleware.Handler
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}
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// GetConfig gets the Config that corresponds to c.
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// If none exist nil is returned.
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func GetConfig(c *caddy.Controller) *Config {
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ctx := c.Context().(*dnsContext)
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if cfg, ok := ctx.keysToConfigs[c.Key]; ok {
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return cfg
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}
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// we should only get here during tests because directive
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// actions typically skip the server blocks where we make
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// the configs.
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ctx.saveConfig(c.Key, &Config{})
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return GetConfig(c)
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}
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// GetMiddleware returns the middleware handler that has been added to the config under name.
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// This is useful to inspect if a certain middleware is active in this server.
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// Note that this is order dependent and the order is defined in directives.go, i.e. if your middleware
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// comes before the middleware you are checking; it will not be there (yet).
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func GetMiddleware(c *caddy.Controller, name string) middleware.Handler {
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// TODO(miek): calling the handler h(nil) should be a noop...
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conf := GetConfig(c)
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for _, h := range conf.Middleware {
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x := h(nil)
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if name == x.Name() {
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return x
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}
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}
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return nil
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}
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