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
112 lines
2.3 KiB
Go
112 lines
2.3 KiB
Go
package dnssec
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import (
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"strconv"
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"strings"
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"github.com/miekg/coredns/core/dnsserver"
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"github.com/miekg/coredns/middleware"
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"github.com/hashicorp/golang-lru"
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"github.com/mholt/caddy"
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)
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func init() {
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caddy.RegisterPlugin("dnssec", caddy.Plugin{
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ServerType: "dns",
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Action: setup,
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})
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}
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func setup(c *caddy.Controller) error {
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zones, keys, capacity, err := dnssecParse(c)
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if err != nil {
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return middleware.Error("dnssec", err)
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}
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cache, err := lru.New(capacity)
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if err != nil {
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return err
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}
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dnsserver.GetConfig(c).AddMiddleware(func(next middleware.Handler) middleware.Handler {
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return New(zones, keys, next, cache)
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})
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// Export the capacity for the metrics. This only happens once, because this is a re-load change only.
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cacheCapacity.WithLabelValues("signature").Set(float64(capacity))
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return nil
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}
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func dnssecParse(c *caddy.Controller) ([]string, []*DNSKEY, int, error) {
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zones := []string{}
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keys := []*DNSKEY{}
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capacity := defaultCap
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for c.Next() {
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if c.Val() == "dnssec" {
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// dnssec [zones...]
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zones = make([]string, len(c.ServerBlockKeys))
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copy(zones, c.ServerBlockKeys)
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args := c.RemainingArgs()
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if len(args) > 0 {
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zones = args
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}
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for c.NextBlock() {
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switch c.Val() {
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case "key":
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k, e := keyParse(c)
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if e != nil {
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return nil, nil, 0, e
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}
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keys = append(keys, k...)
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case "cache_capacity":
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if !c.NextArg() {
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return nil, nil, 0, c.ArgErr()
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}
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value := c.Val()
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cacheCap, err := strconv.Atoi(value)
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if err != nil {
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return nil, nil, 0, err
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}
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capacity = cacheCap
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}
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}
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}
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}
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for i := range zones {
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zones[i] = middleware.Host(zones[i]).Normalize()
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}
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return zones, keys, capacity, nil
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}
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func keyParse(c *caddy.Controller) ([]*DNSKEY, error) {
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keys := []*DNSKEY{}
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if !c.NextArg() {
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return nil, c.ArgErr()
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}
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value := c.Val()
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if value == "file" {
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ks := c.RemainingArgs()
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for _, k := range ks {
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base := k
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// Kmiek.nl.+013+26205.key, handle .private or without extension: Kmiek.nl.+013+26205
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if strings.HasSuffix(k, ".key") {
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base = k[:len(k)-4]
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}
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if strings.HasSuffix(k, ".private") {
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base = k[:len(k)-8]
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}
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k, err := ParseKeyFile(base+".key", base+".private")
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if err != nil {
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return nil, err
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}
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keys = append(keys, k)
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}
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}
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return keys, nil
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}
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