mirror of
https://github.com/coredns/coredns.git
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c840caf1ef
* Speed up testing * make notification run in the background, this recudes the test_readme time from 18s to 0.10s * reduce time for zone reload * TestServeDNSConcurrent remove entirely. This took a whopping 58s for ... ? A few minutes staring didn't reveal wth it is actually testing. Making values smaller revealed race conditions in the tests. Remove entirely. * Move many interval values to variables so we can reset them to short values for the tests. * test_large_axfr: make the zone smaller. The number used 64K has no rational, make it 64/10 to speed up. * TestProxyThreeWay: use client with shorter timeout A few random tidbits in other tests. Total time saved: 177s (almost 3m) - which makes it worthwhile again to run the test locally: this branch: ~~~ ok github.com/coredns/coredns/test 10.437s cd plugin; time go t ./... 5,51s user 7,51s system 11,15s elapsed 744%CPU ( ~~~ master: ~~~ ok github.com/coredns/coredns/test 35.252s cd plugin; time go t ./... 157,64s user 15,39s system 50,05s elapsed 345%CPU () ~~~ tests/ -25s plugins/ -40s This brings the total on 20s, and another 10s can be saved by fixing dnstapio. Moving this to 5s would be even better, but 10s is also nice. Signed-off-by: Miek Gieben <miek@miek.nl> * Also 0.01 Signed-off-by: Miek Gieben <miek@miek.nl>
92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
package forward
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import (
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"crypto/tls"
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"sync/atomic"
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"time"
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"github.com/coredns/coredns/plugin/pkg/transport"
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"github.com/miekg/dns"
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)
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// HealthChecker checks the upstream health.
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type HealthChecker interface {
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Check(*Proxy) error
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SetTLSConfig(*tls.Config)
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SetRecursionDesired(bool)
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GetRecursionDesired() bool
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}
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// dnsHc is a health checker for a DNS endpoint (DNS, and DoT).
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type dnsHc struct {
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c *dns.Client
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recursionDesired bool
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}
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var (
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hcReadTimeout = 1 * time.Second
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hcWriteTimeout = 1 * time.Second
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)
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// NewHealthChecker returns a new HealthChecker based on transport.
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func NewHealthChecker(trans string, recursionDesired bool) HealthChecker {
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switch trans {
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case transport.DNS, transport.TLS:
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c := new(dns.Client)
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c.Net = "udp"
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c.ReadTimeout = hcReadTimeout
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c.WriteTimeout = hcWriteTimeout
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return &dnsHc{c: c, recursionDesired: recursionDesired}
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}
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log.Warningf("No healthchecker for transport %q", trans)
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return nil
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}
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func (h *dnsHc) SetTLSConfig(cfg *tls.Config) {
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h.c.Net = "tcp-tls"
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h.c.TLSConfig = cfg
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}
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func (h *dnsHc) SetRecursionDesired(recursionDesired bool) {
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h.recursionDesired = recursionDesired
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}
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func (h *dnsHc) GetRecursionDesired() bool {
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return h.recursionDesired
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}
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// For HC we send to . IN NS +[no]rec message to the upstream. Dial timeouts and empty
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// replies are considered fails, basically anything else constitutes a healthy upstream.
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// Check is used as the up.Func in the up.Probe.
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func (h *dnsHc) Check(p *Proxy) error {
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err := h.send(p.addr)
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if err != nil {
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HealthcheckFailureCount.WithLabelValues(p.addr).Add(1)
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atomic.AddUint32(&p.fails, 1)
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return err
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}
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atomic.StoreUint32(&p.fails, 0)
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return nil
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}
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func (h *dnsHc) send(addr string) error {
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ping := new(dns.Msg)
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ping.SetQuestion(".", dns.TypeNS)
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ping.MsgHdr.RecursionDesired = h.recursionDesired
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m, _, err := h.c.Exchange(ping, addr)
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// If we got a header, we're alright, basically only care about I/O errors 'n stuff.
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if err != nil && m != nil {
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// Silly check, something sane came back.
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if m.Response || m.Opcode == dns.OpcodeQuery {
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err = nil
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}
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}
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return err
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}
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