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plugin/forward: Allow Proxy to be used outside of forward plugin. (#5951)

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* plugin/forward: Move Proxy into pkg/plugin/proxy, to allow forward.Proxy to be used outside of forward plugin.

Signed-off-by: Patrick Downey <patrick.downey@dioadconsulting.com>
This commit is contained in:
Pat Downey
2023-03-24 12:55:51 +00:00
committed by GitHub
parent 47dceabfc6
commit f823825f8a
19 changed files with 529 additions and 210 deletions
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153
plugin/pkg/proxy/health_test.go Normal file
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@@ -0,0 +1,153 @@
package proxy
import (
"sync/atomic"
"testing"
"time"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/pkg/transport"
"github.com/miekg/dns"
)
func TestHealth(t *testing.T) {
i := uint32(0)
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
if r.Question[0].Name == "." && r.RecursionDesired == true {
atomic.AddUint32(&i, 1)
}
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
hc := NewHealthChecker(transport.DNS, true, "")
hc.SetReadTimeout(10 * time.Millisecond)
hc.SetWriteTimeout(10 * time.Millisecond)
p := NewProxy(s.Addr, transport.DNS)
p.readTimeout = 10 * time.Millisecond
err := hc.Check(p)
if err != nil {
t.Errorf("check failed: %v", err)
}
time.Sleep(20 * time.Millisecond)
i1 := atomic.LoadUint32(&i)
if i1 != 1 {
t.Errorf("Expected number of health checks with RecursionDesired==true to be %d, got %d", 1, i1)
}
}
func TestHealthTCP(t *testing.T) {
i := uint32(0)
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
if r.Question[0].Name == "." && r.RecursionDesired == true {
atomic.AddUint32(&i, 1)
}
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
hc := NewHealthChecker(transport.DNS, true, "")
hc.SetTCPTransport()
hc.SetReadTimeout(10 * time.Millisecond)
hc.SetWriteTimeout(10 * time.Millisecond)
p := NewProxy(s.Addr, transport.DNS)
p.readTimeout = 10 * time.Millisecond
err := hc.Check(p)
if err != nil {
t.Errorf("check failed: %v", err)
}
time.Sleep(20 * time.Millisecond)
i1 := atomic.LoadUint32(&i)
if i1 != 1 {
t.Errorf("Expected number of health checks with RecursionDesired==true to be %d, got %d", 1, i1)
}
}
func TestHealthNoRecursion(t *testing.T) {
i := uint32(0)
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
if r.Question[0].Name == "." && r.RecursionDesired == false {
atomic.AddUint32(&i, 1)
}
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
hc := NewHealthChecker(transport.DNS, false, "")
hc.SetReadTimeout(10 * time.Millisecond)
hc.SetWriteTimeout(10 * time.Millisecond)
p := NewProxy(s.Addr, transport.DNS)
p.readTimeout = 10 * time.Millisecond
err := hc.Check(p)
if err != nil {
t.Errorf("check failed: %v", err)
}
time.Sleep(20 * time.Millisecond)
i1 := atomic.LoadUint32(&i)
if i1 != 1 {
t.Errorf("Expected number of health checks with RecursionDesired==false to be %d, got %d", 1, i1)
}
}
func TestHealthTimeout(t *testing.T) {
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
// timeout
})
defer s.Close()
hc := NewHealthChecker(transport.DNS, false, "")
hc.SetReadTimeout(10 * time.Millisecond)
hc.SetWriteTimeout(10 * time.Millisecond)
p := NewProxy(s.Addr, transport.DNS)
p.readTimeout = 10 * time.Millisecond
err := hc.Check(p)
if err == nil {
t.Errorf("expected error")
}
}
func TestHealthDomain(t *testing.T) {
hcDomain := "example.org."
i := uint32(0)
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
if r.Question[0].Name == hcDomain && r.RecursionDesired == true {
atomic.AddUint32(&i, 1)
}
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
hc := NewHealthChecker(transport.DNS, true, hcDomain)
hc.SetReadTimeout(10 * time.Millisecond)
hc.SetWriteTimeout(10 * time.Millisecond)
p := NewProxy(s.Addr, transport.DNS)
p.readTimeout = 10 * time.Millisecond
err := hc.Check(p)
if err != nil {
t.Errorf("check failed: %v", err)
}
time.Sleep(12 * time.Millisecond)
i1 := atomic.LoadUint32(&i)
if i1 != 1 {
t.Errorf("Expected number of health checks with Domain==%s to be %d, got %d", hcDomain, 1, i1)
}
}