forked from a3linux/go-aws-mon
/
cw.go
109 lines (94 loc) · 2.63 KB
/
cw.go
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package main
import (
"encoding/json"
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
//"github.com/aws/aws-sdk-go/aws/awsutil"
"github.com/aws/aws-sdk-go/service/cloudwatch"
"io/ioutil"
"log"
"net/http"
)
func getDimensions(metadata map[string]string) (ret []*cloudwatch.Dimension) {
var _ret []*cloudwatch.Dimension
instanceIdName := "InstanceId"
instanceIdValue, ok := metadata["instanceId"]
if ok {
dim := cloudwatch.Dimension{
Name: aws.String(instanceIdName),
Value: aws.String(instanceIdValue),
}
_ret = append(_ret, &dim)
}
fileSystemName := "Filesystem"
fileSystemValue, ok := metadata["fileSystem"]
if ok {
dim := cloudwatch.Dimension{
Name: aws.String(fileSystemName),
Value: aws.String(fileSystemValue),
}
_ret = append(_ret, &dim)
}
return _ret
}
func addMetric(name, unit string, value float64, dimensions []*cloudwatch.Dimension, metricData []*cloudwatch.MetricDatum) (ret []*cloudwatch.MetricDatum, err error) {
_metric := cloudwatch.MetricDatum{
MetricName: aws.String(name),
Unit: aws.String(unit),
Value: aws.Float64(value),
Dimensions: dimensions,
}
metricData = append(metricData, &_metric)
return metricData, nil
}
func putMetric(metricdata []*cloudwatch.MetricDatum, namespace, region string) error {
svc := cloudwatch.New(&aws.Config{Region: aws.String(region)})
metric_input := &cloudwatch.PutMetricDataInput{
MetricData: metricdata,
Namespace: aws.String(namespace),
}
resp, err := svc.PutMetricData(metric_input)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
return fmt.Errorf("[%s] %s", awsErr.Code, awsErr.Message)
} else if err != nil {
return err
}
}
log.Println(resp)
return nil
}
/*
Metadata struct:
{
"devpayProductCodes" : null,
"privateIp" : "10.0.5.89",
"availabilityZone" : "us-west-1a",
"version" : "2010-08-31",
"region" : "us-west-1",
"instanceId" : "i-e0iag2b",
"billingProducts" : null,
"accountId" : "208372078340",
"instanceType" : "m3.xlarge",
"imageId" : "ami-43f91b07",
"kernelId" : null,
"ramdiskId" : null,
"pendingTime" : "2015-06-30T08:28:48Z",
"architecture" : "x86_64"
}
*/
func getInstanceMetadata() (metadata map[string]string, err error) {
var data map[string]string
resp, err := http.Get("http://169.254.169.254/latest/dynamic/instance-identity/document")
if err != nil {
return data, fmt.Errorf("can't reach metadata endpoint - %s", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return data, fmt.Errorf("can't read metadata response body - %s", err)
}
json.Unmarshal(body, &data)
return data, err
}