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# Amon Output Plugin | ||
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This plugin writes to [Amon](https://www.amon.cx) | ||
and requires an `serverkey` and `amoninstance` URL which can be obtained [here](https://www.amon.cx/docs/monitoring/) | ||
for the account. | ||
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If the point value being sent cannot be converted to a float64, the metric is skipped. | ||
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Metrics are grouped by converting any `_` characters to `.` in the Point Name. |
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package amon | ||
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import ( | ||
"bytes" | ||
"encoding/json" | ||
"fmt" | ||
"log" | ||
"net/http" | ||
"strings" | ||
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"github.com/influxdb/influxdb/client/v2" | ||
"github.com/influxdb/telegraf/duration" | ||
"github.com/influxdb/telegraf/outputs" | ||
) | ||
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type Amon struct { | ||
ServerKey string | ||
AmonInstance string | ||
Timeout duration.Duration | ||
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client *http.Client | ||
} | ||
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var sampleConfig = ` | ||
# Amon Server Key | ||
server_key = "my-server-key" # required. | ||
# Amon Instance URL | ||
amon_instance = "https://youramoninstance" # required | ||
# Connection timeout. | ||
# timeout = "5s" | ||
` | ||
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type TimeSeries struct { | ||
Series []*Metric `json:"series"` | ||
} | ||
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type Metric struct { | ||
Metric string `json:"metric"` | ||
Points [1]Point `json:"points"` | ||
} | ||
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type Point [2]float64 | ||
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func (a *Amon) Connect() error { | ||
if a.ServerKey == "" || a.AmonInstance == "" { | ||
return fmt.Errorf("serverkey and amon_instance are required fields for amon output") | ||
} | ||
a.client = &http.Client{ | ||
Timeout: a.Timeout.Duration, | ||
} | ||
return nil | ||
} | ||
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func (a *Amon) Write(points []*client.Point) error { | ||
if len(points) == 0 { | ||
return nil | ||
} | ||
ts := TimeSeries{} | ||
var tempSeries = make([]*Metric, len(points)) | ||
var acceptablePoints = 0 | ||
for _, pt := range points { | ||
metric := &Metric{ | ||
Metric: strings.Replace(pt.Name(), "_", ".", -1), | ||
} | ||
if p, err := buildPoint(pt); err == nil { | ||
metric.Points[0] = p | ||
tempSeries[acceptablePoints] = metric | ||
acceptablePoints += 1 | ||
} else { | ||
log.Printf("unable to build Metric for %s, skipping\n", pt.Name()) | ||
} | ||
} | ||
ts.Series = make([]*Metric, acceptablePoints) | ||
copy(ts.Series, tempSeries[0:]) | ||
tsBytes, err := json.Marshal(ts) | ||
if err != nil { | ||
return fmt.Errorf("unable to marshal TimeSeries, %s\n", err.Error()) | ||
} | ||
req, err := http.NewRequest("POST", a.authenticatedUrl(), bytes.NewBuffer(tsBytes)) | ||
if err != nil { | ||
return fmt.Errorf("unable to create http.Request, %s\n", err.Error()) | ||
} | ||
req.Header.Add("Content-Type", "application/json") | ||
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resp, err := a.client.Do(req) | ||
if err != nil { | ||
return fmt.Errorf("error POSTing metrics, %s\n", err.Error()) | ||
} | ||
defer resp.Body.Close() | ||
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if resp.StatusCode < 200 || resp.StatusCode > 209 { | ||
return fmt.Errorf("received bad status code, %d\n", resp.StatusCode) | ||
} | ||
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return nil | ||
} | ||
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func (a *Amon) SampleConfig() string { | ||
return sampleConfig | ||
} | ||
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func (a *Amon) Description() string { | ||
return "Configuration for Amon Server to send metrics to." | ||
} | ||
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func (a *Amon) authenticatedUrl() string { | ||
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return fmt.Sprintf("%s/api/system/%s", a.AmonInstance, a.ServerKey) | ||
} | ||
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func buildPoint(pt *client.Point) (Point, error) { | ||
var p Point | ||
if err := p.setValue(pt.Fields()["value"]); err != nil { | ||
return p, fmt.Errorf("unable to extract value from Fields, %s", err.Error()) | ||
} | ||
p[0] = float64(pt.Time().Unix()) | ||
return p, nil | ||
} | ||
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func (p *Point) setValue(v interface{}) error { | ||
switch d := v.(type) { | ||
case int: | ||
p[1] = float64(int(d)) | ||
case int32: | ||
p[1] = float64(int32(d)) | ||
case int64: | ||
p[1] = float64(int64(d)) | ||
case float32: | ||
p[1] = float64(d) | ||
case float64: | ||
p[1] = float64(d) | ||
default: | ||
return fmt.Errorf("undeterminable type") | ||
} | ||
return nil | ||
} | ||
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func (a *Amon) Close() error { | ||
return nil | ||
} | ||
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func init() { | ||
outputs.Add("amon", func() outputs.Output { | ||
return &Amon{} | ||
}) | ||
} |
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package amon | ||
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import ( | ||
"encoding/json" | ||
"fmt" | ||
"net/http" | ||
"net/http/httptest" | ||
"reflect" | ||
"testing" | ||
"time" | ||
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"github.com/influxdb/telegraf/testutil" | ||
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"github.com/influxdb/influxdb/client/v2" | ||
"github.com/stretchr/testify/assert" | ||
"github.com/stretchr/testify/require" | ||
) | ||
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var ( | ||
fakeServerKey = "123456" | ||
fakeAmonInstance = "https://demo.amon.cx" | ||
) | ||
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func TestUriOverride(t *testing.T) { | ||
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
w.WriteHeader(http.StatusOK) | ||
json.NewEncoder(w).Encode(`{"status":"ok"}`) | ||
})) | ||
defer ts.Close() | ||
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a := &Amon{ | ||
ServerKey: fakeServerKey, | ||
AmonInstance: fakeAmonInstance, | ||
} | ||
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err := a.Connect() | ||
require.NoError(t, err) | ||
err = a.Write(testutil.MockBatchPoints().Points()) | ||
require.NoError(t, err) | ||
} | ||
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func TestAuthenticatedUrl(t *testing.T) { | ||
a := &Amon{ | ||
ServerKey: fakeServerKey, | ||
AmonInstance: fakeAmonInstance, | ||
} | ||
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authUrl := a.authenticatedUrl() | ||
assert.EqualValues(t, fmt.Sprintf("%s/api/system/%s", fakeAmonInstance, fakeServerKey), authUrl) | ||
} | ||
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func TestBuildPoint(t *testing.T) { | ||
tags := make(map[string]string) | ||
var tagtests = []struct { | ||
ptIn *client.Point | ||
outPt Point | ||
err error | ||
}{ | ||
{ | ||
client.NewPoint( | ||
"test1", | ||
tags, | ||
map[string]interface{}{"value": 0.0}, | ||
time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), | ||
), | ||
Point{ | ||
float64(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix()), | ||
0.0, | ||
}, | ||
nil, | ||
}, | ||
{ | ||
client.NewPoint( | ||
"test2", | ||
tags, | ||
map[string]interface{}{"value": 1.0}, | ||
time.Date(2010, time.December, 10, 23, 0, 0, 0, time.UTC), | ||
), | ||
Point{ | ||
float64(time.Date(2010, time.December, 10, 23, 0, 0, 0, time.UTC).Unix()), | ||
1.0, | ||
}, | ||
nil, | ||
}, | ||
{ | ||
client.NewPoint( | ||
"test3", | ||
tags, | ||
map[string]interface{}{"value": 10}, | ||
time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), | ||
), | ||
Point{ | ||
float64(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix()), | ||
10.0, | ||
}, | ||
nil, | ||
}, | ||
{ | ||
client.NewPoint( | ||
"test4", | ||
tags, | ||
map[string]interface{}{"value": int32(112345)}, | ||
time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), | ||
), | ||
Point{ | ||
float64(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix()), | ||
112345.0, | ||
}, | ||
nil, | ||
}, | ||
{ | ||
client.NewPoint( | ||
"test5", | ||
tags, | ||
map[string]interface{}{"value": int64(112345)}, | ||
time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), | ||
), | ||
Point{ | ||
float64(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix()), | ||
112345.0, | ||
}, | ||
nil, | ||
}, | ||
{ | ||
client.NewPoint( | ||
"test6", | ||
tags, | ||
map[string]interface{}{"value": float32(11234.5)}, | ||
time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), | ||
), | ||
Point{ | ||
float64(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix()), | ||
11234.5, | ||
}, | ||
nil, | ||
}, | ||
{ | ||
client.NewPoint( | ||
"test7", | ||
tags, | ||
map[string]interface{}{"value": "11234.5"}, | ||
time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), | ||
), | ||
Point{ | ||
float64(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix()), | ||
11234.5, | ||
}, | ||
fmt.Errorf("unable to extract value from Fields, undeterminable type"), | ||
}, | ||
} | ||
for _, tt := range tagtests { | ||
pt, err := buildPoint(tt.ptIn) | ||
if err != nil && tt.err == nil { | ||
t.Errorf("%s: unexpected error, %+v\n", tt.ptIn.Name(), err) | ||
} | ||
if tt.err != nil && err == nil { | ||
t.Errorf("%s: expected an error (%s) but none returned", tt.ptIn.Name(), tt.err.Error()) | ||
} | ||
if !reflect.DeepEqual(pt, tt.outPt) && tt.err == nil { | ||
t.Errorf("%s: \nexpected %+v\ngot %+v\n", tt.ptIn.Name(), tt.outPt, pt) | ||
} | ||
} | ||
} |