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Fix udp metric splitting (#2880)

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This commit is contained in:
Daniel Nelson
2017-06-05 12:44:29 -07:00
committed by GitHub
parent 3103fc775d
commit c1da0002c0
6 changed files with 204 additions and 113 deletions
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27
plugins/outputs/influxdb/client/udp.go
View File

@@ -4,6 +4,7 @@ import (
"bytes"
"fmt"
"io"
"log"
"net"
"net/url"
)
@@ -82,10 +83,28 @@ func (c *udpClient) WriteStream(r io.Reader, contentLength int) (int, error) {
if err != io.EOF && err != nil {
return totaln, err
}
nW, err := c.conn.Write(c.buffer[0:nR])
totaln += nW
if err != nil {
return totaln, err
if c.buffer[nR-1] == uint8('\n') {
nW, err := c.conn.Write(c.buffer[0:nR])
totaln += nW
if err != nil {
return totaln, err
}
} else {
log.Printf("E! Could not fit point into UDP payload; dropping")
// Scan forward until next line break to realign.
for {
nR, err := r.Read(c.buffer)
if nR == 0 {
break
}
if err != io.EOF && err != nil {
return totaln, err
}
if c.buffer[nR-1] == uint8('\n') {
break
}
}
}
}
return totaln, nil

81
plugins/outputs/influxdb/client/udp_test.go
View File

@@ -1,7 +1,6 @@
package client
import (
"bytes"
"net"
"testing"
"time"
@@ -10,6 +9,7 @@ import (
"github.com/influxdata/telegraf/metric"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestUDPClient(t *testing.T) {
@@ -72,63 +72,7 @@ func TestUDPClient_Write(t *testing.T) {
pkt := <-packets
assert.Equal(t, "cpu value=99\n", pkt)
metrics := `cpu value=99
cpu value=55
cpu value=44
cpu value=101
cpu value=91
cpu value=92
`
// test sending packet with 6 metrics in a stream.
reader := bytes.NewReader([]byte(metrics))
// contentLength is ignored:
n, err = client.WriteStream(reader, 10)
assert.Equal(t, n, len(metrics))
assert.NoError(t, err)
pkt = <-packets
assert.Equal(t, "cpu value=99\ncpu value=55\ncpu value=44\ncpu value=101\ncpu value=91\ncpu value=92\n", pkt)
//
// Test that UDP packets get broken up properly:
config2 := UDPConfig{
URL: "udp://localhost:8199",
PayloadSize: 25,
}
client2, err := NewUDP(config2)
assert.NoError(t, err)
wp := WriteParams{}
//
// Using Write():
buf := []byte(metrics)
n, err = client2.WriteWithParams(buf, wp)
assert.Equal(t, n, len(metrics))
assert.NoError(t, err)
pkt = <-packets
assert.Equal(t, "cpu value=99\ncpu value=55", pkt)
pkt = <-packets
assert.Equal(t, "\ncpu value=44\ncpu value=1", pkt)
pkt = <-packets
assert.Equal(t, "01\ncpu value=91\ncpu value", pkt)
pkt = <-packets
assert.Equal(t, "=92\n", pkt)
//
// Using WriteStream():
reader = bytes.NewReader([]byte(metrics))
n, err = client2.WriteStreamWithParams(reader, 10, wp)
assert.Equal(t, n, len(metrics))
assert.NoError(t, err)
pkt = <-packets
assert.Equal(t, "cpu value=99\ncpu value=55", pkt)
pkt = <-packets
assert.Equal(t, "\ncpu value=44\ncpu value=1", pkt)
pkt = <-packets
assert.Equal(t, "01\ncpu value=91\ncpu value", pkt)
pkt = <-packets
assert.Equal(t, "=92\n", pkt)
//
// Using WriteStream() & a metric.Reader:
config3 := UDPConfig{
@@ -159,4 +103,27 @@ cpu value=92
assert.Equal(t, "test value=1.1 1484142942000000000\n", pkt)
assert.NoError(t, client.Close())
config = UDPConfig{
URL: "udp://localhost:8199",
PayloadSize: 40,
}
client4, err := NewUDP(config)
assert.NoError(t, err)
ts := time.Unix(1484142943, 0)
m1, _ = metric.New("test", map[string]string{},
map[string]interface{}{"this_is_a_very_long_field_name": 1.1}, ts)
m2, _ = metric.New("test", map[string]string{},
map[string]interface{}{"value": 1.1}, ts)
ms = []telegraf.Metric{m1, m2}
reader := metric.NewReader(ms)
n, err = client4.WriteStream(reader, 0)
assert.NoError(t, err)
require.Equal(t, 35, n)
assert.NoError(t, err)
pkt = <-packets
assert.Equal(t, "test value=1.1 1484142943000000000\n", pkt)
assert.NoError(t, client4.Close())
}