forked from grafana/grafana
/
cloudwatch.go
138 lines (115 loc) · 3.83 KB
/
cloudwatch.go
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package cloudwatch
import (
"encoding/json"
"errors"
"io/ioutil"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/cloudwatch"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/grafana/grafana/pkg/middleware"
)
type actionHandler func(*cwRequest, *middleware.Context)
var actionHandlers map[string]actionHandler
type cwRequest struct {
Region string `json:"region"`
Action string `json:"action"`
Body []byte `json:"-"`
}
func init() {
actionHandlers = map[string]actionHandler{
"GetMetricStatistics": handleGetMetricStatistics,
"ListMetrics": handleListMetrics,
"DescribeInstances": handleDescribeInstances,
"__GetRegions": handleGetRegions,
"__GetNamespaces": handleGetNamespaces,
"__GetMetrics": handleGetMetrics,
"__GetDimensions": handleGetDimensions,
}
}
func handleGetMetricStatistics(req *cwRequest, c *middleware.Context) {
svc := cloudwatch.New(&aws.Config{Region: aws.String(req.Region)})
reqParam := &struct {
Parameters struct {
Namespace string `json:"namespace"`
MetricName string `json:"metricName"`
Dimensions []*cloudwatch.Dimension `json:"dimensions"`
Statistics []*string `json:"statistics"`
StartTime int64 `json:"startTime"`
EndTime int64 `json:"endTime"`
Period int64 `json:"period"`
} `json:"parameters"`
}{}
json.Unmarshal(req.Body, reqParam)
params := &cloudwatch.GetMetricStatisticsInput{
Namespace: aws.String(reqParam.Parameters.Namespace),
MetricName: aws.String(reqParam.Parameters.MetricName),
Dimensions: reqParam.Parameters.Dimensions,
Statistics: reqParam.Parameters.Statistics,
StartTime: aws.Time(time.Unix(reqParam.Parameters.StartTime, 0)),
EndTime: aws.Time(time.Unix(reqParam.Parameters.EndTime, 0)),
Period: aws.Int64(reqParam.Parameters.Period),
}
resp, err := svc.GetMetricStatistics(params)
if err != nil {
c.JsonApiErr(500, "Unable to call AWS API", err)
return
}
c.JSON(200, resp)
}
func handleListMetrics(req *cwRequest, c *middleware.Context) {
svc := cloudwatch.New(&aws.Config{Region: aws.String(req.Region)})
reqParam := &struct {
Parameters struct {
Namespace string `json:"namespace"`
MetricName string `json:"metricName"`
Dimensions []*cloudwatch.DimensionFilter `json:"dimensions"`
} `json:"parameters"`
}{}
json.Unmarshal(req.Body, reqParam)
params := &cloudwatch.ListMetricsInput{
Namespace: aws.String(reqParam.Parameters.Namespace),
MetricName: aws.String(reqParam.Parameters.MetricName),
Dimensions: reqParam.Parameters.Dimensions,
}
resp, err := svc.ListMetrics(params)
if err != nil {
c.JsonApiErr(500, "Unable to call AWS API", err)
return
}
c.JSON(200, resp)
}
func handleDescribeInstances(req *cwRequest, c *middleware.Context) {
svc := ec2.New(&aws.Config{Region: aws.String(req.Region)})
reqParam := &struct {
Parameters struct {
Filters []*ec2.Filter `json:"filters"`
InstanceIds []*string `json:"instanceIds"`
} `json:"parameters"`
}{}
json.Unmarshal(req.Body, reqParam)
params := &ec2.DescribeInstancesInput{}
if len(reqParam.Parameters.Filters) > 0 {
params.Filters = reqParam.Parameters.Filters
}
if len(reqParam.Parameters.InstanceIds) > 0 {
params.InstanceIds = reqParam.Parameters.InstanceIds
}
resp, err := svc.DescribeInstances(params)
if err != nil {
c.JsonApiErr(500, "Unable to call AWS API", err)
return
}
c.JSON(200, resp)
}
func HandleRequest(c *middleware.Context) {
var req cwRequest
req.Body, _ = ioutil.ReadAll(c.Req.Request.Body)
json.Unmarshal(req.Body, &req)
if handler, found := actionHandlers[req.Action]; !found {
c.JsonApiErr(500, "Unexpected AWS Action", errors.New(req.Action))
return
} else {
handler(&req, c)
}
}