add working USGS earthquake plugin

CHANGELOG.md

@@ -13,7 +13,6 @@
 - [#1348](https://github.com/influxdata/telegraf/issues/1348): Telegraf "internal" plugin for collecting stats on itself.
 - [#2127](https://github.com/influxdata/telegraf/pull/2127): Update Go version to 1.7.4.
 - [#2126](https://github.com/influxdata/telegraf/pull/2126): Support a metric.Split function.
-- [#2026](https://github.com/influxdata/telegraf/pull/2065): elasticsearch "shield" (basic auth) support doc.
 
 ### Bugfixes
 
@@ -21,13 +20,6 @@
 - [#1949](https://github.com/influxdata/telegraf/issues/1949): Fix windows `net` plugin.
 - [#1775](https://github.com/influxdata/telegraf/issues/1775): Cache & expire metrics for delivery to prometheus
 
-## v1.1.2 [2016-12-12]
-
-### Bugfixes
-
-- [#2007](https://github.com/influxdata/telegraf/issues/2007): Make snmptranslate not required when using numeric OID.
-- [#2104](https://github.com/influxdata/telegraf/issues/2104): Add a global snmp translation cache.
-
 ## v1.1.1 [2016-11-14]
 
 ### Bugfixes

circle.yml

@@ -5,8 +5,8 @@ machine:
     - sudo service zookeeper stop
     - go version
     - go version | grep 1.7.4 || sudo rm -rf /usr/local/go
-    - wget https://storage.googleapis.com/golang/go1.8beta1.linux-amd64.tar.gz
-    - sudo tar -C /usr/local -xzf go1.8beta1.linux-amd64.tar.gz
+    - wget https://storage.googleapis.com/golang/go1.7.4.linux-amd64.tar.gz
+    - sudo tar -C /usr/local -xzf go1.7.4.linux-amd64.tar.gz
     - go version
 
 dependencies:

cmd/telegraf/telegraf.go

@@ -6,24 +6,18 @@ import (
 	"log"
 	"os"
 	"os/signal"
-	"path"
-	"path/filepath"
-	"plugin"
 	"runtime"
 	"strings"
 	"syscall"
 
-	"github.com/influxdata/telegraf"
 	"github.com/influxdata/telegraf/agent"
 	"github.com/influxdata/telegraf/internal/config"
 	"github.com/influxdata/telegraf/logger"
-	"github.com/influxdata/telegraf/plugins/aggregators"
 	_ "github.com/influxdata/telegraf/plugins/aggregators/all"
 	"github.com/influxdata/telegraf/plugins/inputs"
 	_ "github.com/influxdata/telegraf/plugins/inputs/all"
 	"github.com/influxdata/telegraf/plugins/outputs"
 	_ "github.com/influxdata/telegraf/plugins/outputs/all"
-	"github.com/influxdata/telegraf/plugins/processors"
 	_ "github.com/influxdata/telegraf/plugins/processors/all"
 	"github.com/kardianos/service"
 )
@@ -56,8 +50,6 @@ var fUsage = flag.String("usage", "",
 	"print usage for a plugin, ie, 'telegraf -usage mysql'")
 var fService = flag.String("service", "",
 	"operate on the service")
-var fPlugins = flag.String("plugins", "",
-	"path to directory containing external plugins")
 
 // Telegraf version, populated linker.
 //   ie, -ldflags "-X main.version=`git describe --always --tags`"
@@ -312,93 +304,9 @@ func (p *program) Stop(s service.Service) error {
 	return nil
 }
 
-// loadExternalPlugins loads external plugins from shared libraries (.so, .dll, etc.)
-// in the specified directory.
-func loadExternalPlugins(dir string) error {
-	return filepath.Walk(dir, func(pth string, info os.FileInfo, err error) error {
-		// Stop if there was an error.
-		if err != nil {
-			return err
-		}
-
-		// Ignore directories.
-		if info.IsDir() {
-			return nil
-		}
-
-		// Ignore files that aren't shared libraries.
-		ext := strings.ToLower(path.Ext(pth))
-		if ext != ".so" && ext != ".dll" {
-			return nil
-		}
-
-		// Load plugin.
-		p, err := plugin.Open(pth)
-		if err != nil {
-			return err
-		}
-
-		// Register plugin.
-		if err := registerPlugin(dir, pth, p); err != nil {
-			return err
-		}
-
-		return nil
-	})
-}
-
-// registerPlugin registers an external plugin with telegraf.
-func registerPlugin(pluginsDir, filePath string, p *plugin.Plugin) error {
-	// Clean the file path and make sure it's relative to the root plugins directory.
-	// This is done because plugin names are namespaced using the directory
-	// structure. E.g., if the root plugin directory, passed in the pluginsDir
-	// argument, is '/home/jdoe/bin/telegraf/plugins' and we're registering plugin
-	// '/home/jdoe/bin/telegraf/plugins/input/mysql.so'
-	pluginsDir = filepath.Clean(pluginsDir)
-	parentDir, _ := filepath.Split(pluginsDir)
-	var err error
-	if filePath, err = filepath.Rel(parentDir, filePath); err != nil {
-		return err
-	}
-	// Strip the file extension and save it.
-	ext := path.Ext(filePath)
-	filePath = strings.TrimSuffix(filePath, ext)
-	// Convert path separators to "." to generate a plugin name namespaced by directory names.
-	name := strings.Replace(filePath, string(os.PathSeparator), ".", -1)
-
-	if create, err := p.Lookup("NewInput"); err == nil {
-		inputs.Add(name, inputs.Creator(create.(func() telegraf.Input)))
-	} else if create, err := p.Lookup("NewOutput"); err == nil {
-		outputs.Add(name, outputs.Creator(create.(func() telegraf.Output)))
-	} else if create, err := p.Lookup("NewProcessor"); err == nil {
-		processors.Add(name, processors.Creator(create.(func() telegraf.Processor)))
-	} else if create, err := p.Lookup("NewAggregator"); err == nil {
-		aggregators.Add(name, aggregators.Creator(create.(func() telegraf.Aggregator)))
-	} else {
-		return fmt.Errorf("not a telegraf plugin: %s%s", filePath, ext)
-	}
-
-	log.Printf("I! Registered: %s (from %s%s)\n", name, filePath, ext)
-
-	return nil
-}
-
 func main() {
 	flag.Usage = func() { usageExit(0) }
 	flag.Parse()
-
-	// Load external plugins, if requested.
-	if *fPlugins != "" {
-		pluginsDir, err := filepath.Abs(*fPlugins)
-		if err != nil {
-			log.Fatal("E! " + err.Error())
-		}
-		log.Printf("I! Loading external plugins from: %s\n", pluginsDir)
-		if err := loadExternalPlugins(*fPlugins); err != nil {
-			log.Fatal("E! " + err.Error())
-		}
-	}
-
 	if runtime.GOOS == "windows" {
 		svcConfig := &service.Config{
 			Name:        "telegraf",

etc/telegraf.conf

@@ -777,8 +777,6 @@
 # # Read stats from one or more Elasticsearch servers or clusters
 # [[inputs.elasticsearch]]
 #   ## specify a list of one or more Elasticsearch servers
-#   # you can add username and password to your url to use basic authentication:
-#   # servers = ["http://user:pass@localhost:9200"]
 #   servers = ["http://localhost:9200"]
 #
 #   ## Timeout for HTTP requests to the elastic search server(s)

plugins/inputs/all/all.go

@@ -75,6 +75,7 @@ import (
 	_ "github.com/influxdata/telegraf/plugins/inputs/trig"
 	_ "github.com/influxdata/telegraf/plugins/inputs/twemproxy"
 	_ "github.com/influxdata/telegraf/plugins/inputs/udp_listener"
+	_ "github.com/influxdata/telegraf/plugins/inputs/usgs"
 	_ "github.com/influxdata/telegraf/plugins/inputs/varnish"
 	_ "github.com/influxdata/telegraf/plugins/inputs/webhooks"
 	_ "github.com/influxdata/telegraf/plugins/inputs/win_perf_counters"

plugins/inputs/elasticsearch/elasticsearch.go

@@ -60,8 +60,6 @@ type indexHealth struct {
 
 const sampleConfig = `
   ## specify a list of one or more Elasticsearch servers
-  # you can add username and password to your url to use basic authentication:
-  # servers = ["http://user:pass@localhost:9200"]
   servers = ["http://localhost:9200"]
 
   ## Timeout for HTTP requests to the elastic search server(s)

plugins/inputs/snmp/snmp.go

@@ -8,7 +8,6 @@ import (
 	"os/exec"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/influxdata/telegraf"
@@ -200,22 +199,65 @@ func (t *Table) init() error {
 	return nil
 }
 
-// initBuild initializes the table if it has an OID configured. If so, the
-// net-snmp tools will be used to look up the OID and auto-populate the table's
-// fields.
+// init() populates Fields if a table OID is provided.
 func (t *Table) initBuild() error {
 	if t.Oid == "" {
 		return nil
 	}
 
-	_, _, oidText, fields, err := snmpTable(t.Oid)
+	mibName, _, oidText, _, err := snmpTranslate(t.Oid)
 	if err != nil {
-		return Errorf(err, "initializing table %s", t.Oid)
+		return Errorf(err, "translating %s", t.Oid)
 	}
 	if t.Name == "" {
 		t.Name = oidText
 	}
-	t.Fields = append(t.Fields, fields...)
+	mibPrefix := mibName + "::"
+	oidFullName := mibPrefix + oidText
+
+	// first attempt to get the table's tags
+	tagOids := map[string]struct{}{}
+	// We have to guess that the "entry" oid is `t.Oid+".1"`. snmptable and snmptranslate don't seem to have a way to provide the info.
+	if out, err := execCmd("snmptranslate", "-Td", oidFullName+".1"); err == nil {
+		lines := bytes.Split(out, []byte{'\n'})
+		for _, line := range lines {
+			if !bytes.HasPrefix(line, []byte("  INDEX")) {
+				continue
+			}
+
+			i := bytes.Index(line, []byte("{ "))
+			if i == -1 { // parse error
+				continue
+			}
+			line = line[i+2:]
+			i = bytes.Index(line, []byte(" }"))
+			if i == -1 { // parse error
+				continue
+			}
+			line = line[:i]
+			for _, col := range bytes.Split(line, []byte(", ")) {
+				tagOids[mibPrefix+string(col)] = struct{}{}
+			}
+		}
+	}
+
+	// this won't actually try to run a query. The `-Ch` will just cause it to dump headers.
+	out, err := execCmd("snmptable", "-Ch", "-Cl", "-c", "public", "127.0.0.1", oidFullName)
+	if err != nil {
+		return Errorf(err, "getting table columns for %s", t.Oid)
+	}
+	cols := bytes.SplitN(out, []byte{'\n'}, 2)[0]
+	if len(cols) == 0 {
+		return fmt.Errorf("unable to get columns for table %s", t.Oid)
+	}
+	for _, col := range bytes.Split(cols, []byte{' '}) {
+		if len(col) == 0 {
+			continue
+		}
+		col := string(col)
+		_, isTag := tagOids[mibPrefix+col]
+		t.Fields = append(t.Fields, Field{Name: col, Oid: mibPrefix + col, IsTag: isTag})
+	}
 
 	return nil
 }
@@ -799,141 +841,13 @@ func fieldConvert(conv string, v interface{}) (interface{}, error) {
 	return nil, fmt.Errorf("invalid conversion type '%s'", conv)
 }
 
-type snmpTableCache struct {
-	mibName string
-	oidNum  string
-	oidText string
-	fields  []Field
-	err     error
-}
-
-var snmpTableCaches map[string]snmpTableCache
-var snmpTableCachesLock sync.Mutex
-
-// snmpTable resolves the given OID as a table, providing information about the
-// table and fields within.
-func snmpTable(oid string) (mibName string, oidNum string, oidText string, fields []Field, err error) {
-	snmpTableCachesLock.Lock()
-	if snmpTableCaches == nil {
-		snmpTableCaches = map[string]snmpTableCache{}
-	}
-
-	var stc snmpTableCache
-	var ok bool
-	if stc, ok = snmpTableCaches[oid]; !ok {
-		stc.mibName, stc.oidNum, stc.oidText, stc.fields, stc.err = snmpTableCall(oid)
-		snmpTableCaches[oid] = stc
-	}
-
-	snmpTableCachesLock.Unlock()
-	return stc.mibName, stc.oidNum, stc.oidText, stc.fields, stc.err
-}
-
-func snmpTableCall(oid string) (mibName string, oidNum string, oidText string, fields []Field, err error) {
-	mibName, oidNum, oidText, _, err = snmpTranslate(oid)
-	if err != nil {
-		return "", "", "", nil, Errorf(err, "translating")
-	}
-
-	mibPrefix := mibName + "::"
-	oidFullName := mibPrefix + oidText
-
-	// first attempt to get the table's tags
-	tagOids := map[string]struct{}{}
-	// We have to guess that the "entry" oid is `oid+".1"`. snmptable and snmptranslate don't seem to have a way to provide the info.
-	if out, err := execCmd("snmptranslate", "-Td", oidFullName+".1"); err == nil {
-		lines := bytes.Split(out, []byte{'\n'})
-		for _, line := range lines {
-			if !bytes.HasPrefix(line, []byte("  INDEX")) {
-				continue
-			}
-
-			i := bytes.Index(line, []byte("{ "))
-			if i == -1 { // parse error
-				continue
-			}
-			line = line[i+2:]
-			i = bytes.Index(line, []byte(" }"))
-			if i == -1 { // parse error
-				continue
-			}
-			line = line[:i]
-			for _, col := range bytes.Split(line, []byte(", ")) {
-				tagOids[mibPrefix+string(col)] = struct{}{}
-			}
-		}
-	}
-
-	// this won't actually try to run a query. The `-Ch` will just cause it to dump headers.
-	out, err := execCmd("snmptable", "-Ch", "-Cl", "-c", "public", "127.0.0.1", oidFullName)
-	if err != nil {
-		return "", "", "", nil, Errorf(err, "getting table columns")
-	}
-	cols := bytes.SplitN(out, []byte{'\n'}, 2)[0]
-	if len(cols) == 0 {
-		return "", "", "", nil, fmt.Errorf("could not find any columns in table")
-	}
-	for _, col := range bytes.Split(cols, []byte{' '}) {
-		if len(col) == 0 {
-			continue
-		}
-		col := string(col)
-		_, isTag := tagOids[mibPrefix+col]
-		fields = append(fields, Field{Name: col, Oid: mibPrefix + col, IsTag: isTag})
-	}
-
-	return mibName, oidNum, oidText, fields, err
-}
-
-type snmpTranslateCache struct {
-	mibName    string
-	oidNum     string
-	oidText    string
-	conversion string
-	err        error
-}
-
-var snmpTranslateCachesLock sync.Mutex
-var snmpTranslateCaches map[string]snmpTranslateCache
-
 // snmpTranslate resolves the given OID.
 func snmpTranslate(oid string) (mibName string, oidNum string, oidText string, conversion string, err error) {
-	snmpTranslateCachesLock.Lock()
-	if snmpTranslateCaches == nil {
-		snmpTranslateCaches = map[string]snmpTranslateCache{}
-	}
-
-	var stc snmpTranslateCache
-	var ok bool
-	if stc, ok = snmpTranslateCaches[oid]; !ok {
-		// This will result in only one call to snmptranslate running at a time.
-		// We could speed it up by putting a lock in snmpTranslateCache and then
-		// returning it immediately, and multiple callers would then release the
-		// snmpTranslateCachesLock and instead wait on the individual
-		// snmpTranlsation.Lock to release. But I don't know that the extra complexity
-		// is worth it. Especially when it would slam the system pretty hard if lots
-		// of lookups are being perfomed.
-
-		stc.mibName, stc.oidNum, stc.oidText, stc.conversion, stc.err = snmpTranslateCall(oid)
-		snmpTranslateCaches[oid] = stc
-	}
-
-	snmpTranslateCachesLock.Unlock()
-
-	return stc.mibName, stc.oidNum, stc.oidText, stc.conversion, stc.err
-}
-
-func snmpTranslateCall(oid string) (mibName string, oidNum string, oidText string, conversion string, err error) {
 	var out []byte
 	if strings.ContainsAny(oid, ":abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") {
 		out, err = execCmd("snmptranslate", "-Td", "-Ob", oid)
 	} else {
 		out, err = execCmd("snmptranslate", "-Td", "-Ob", "-m", "all", oid)
-		if err, ok := err.(*exec.Error); ok && err.Err == exec.ErrNotFound {
-			// Silently discard error if snmptranslate not found and we have a numeric OID.
-			// Meaning we can get by without the lookup.
-			return "", oid, oid, "", nil
-		}
 	}
 	if err != nil {
 		return "", "", "", "", err

plugins/inputs/snmp/snmp_test.go

@@ -4,7 +4,6 @@ package snmp
 import (
 	"fmt"
 	"net"
-	"os/exec"
 	"sync"
 	"testing"
 	"time"
@@ -199,56 +198,6 @@ func TestSnmpInit(t *testing.T) {
 	}, s.Fields[0])
 }
 
-func TestSnmpInit_noTranslate(t *testing.T) {
-	// override execCommand so it returns exec.ErrNotFound
-	defer func(ec func(string, ...string) *exec.Cmd) { execCommand = ec }(execCommand)
-	execCommand = func(_ string, _ ...string) *exec.Cmd {
-		return exec.Command("snmptranslateExecErrNotFound")
-	}
-
-	s := &Snmp{
-		Fields: []Field{
-			{Oid: ".1.1.1.1", Name: "one", IsTag: true},
-			{Oid: ".1.1.1.2", Name: "two"},
-			{Oid: ".1.1.1.3"},
-		},
-		Tables: []Table{
-			{Fields: []Field{
-				{Oid: ".1.1.1.4", Name: "four", IsTag: true},
-				{Oid: ".1.1.1.5", Name: "five"},
-				{Oid: ".1.1.1.6"},
-			}},
-		},
-	}
-
-	err := s.init()
-	require.NoError(t, err)
-
-	assert.Equal(t, ".1.1.1.1", s.Fields[0].Oid)
-	assert.Equal(t, "one", s.Fields[0].Name)
-	assert.Equal(t, true, s.Fields[0].IsTag)
-
-	assert.Equal(t, ".1.1.1.2", s.Fields[1].Oid)
-	assert.Equal(t, "two", s.Fields[1].Name)
-	assert.Equal(t, false, s.Fields[1].IsTag)
-
-	assert.Equal(t, ".1.1.1.3", s.Fields[2].Oid)
-	assert.Equal(t, ".1.1.1.3", s.Fields[2].Name)
-	assert.Equal(t, false, s.Fields[2].IsTag)
-
-	assert.Equal(t, ".1.1.1.4", s.Tables[0].Fields[0].Oid)
-	assert.Equal(t, "four", s.Tables[0].Fields[0].Name)
-	assert.Equal(t, true, s.Tables[0].Fields[0].IsTag)
-
-	assert.Equal(t, ".1.1.1.5", s.Tables[0].Fields[1].Oid)
-	assert.Equal(t, "five", s.Tables[0].Fields[1].Name)
-	assert.Equal(t, false, s.Tables[0].Fields[1].IsTag)
-
-	assert.Equal(t, ".1.1.1.6", s.Tables[0].Fields[2].Oid)
-	assert.Equal(t, ".1.1.1.6", s.Tables[0].Fields[2].Name)
-	assert.Equal(t, false, s.Tables[0].Fields[2].IsTag)
-}
-
 func TestGetSNMPConnection_v2(t *testing.T) {
 	s := &Snmp{
 		Timeout:   internal.Duration{Duration: 3 * time.Second},
@@ -648,71 +597,6 @@ func TestFieldConvert(t *testing.T) {
 	}
 }
 
-func TestSnmpTranslateCache_miss(t *testing.T) {
-	snmpTranslateCaches = nil
-	oid := "IF-MIB::ifPhysAddress.1"
-	mibName, oidNum, oidText, conversion, err := snmpTranslate(oid)
-	assert.Len(t, snmpTranslateCaches, 1)
-	stc := snmpTranslateCaches[oid]
-	require.NotNil(t, stc)
-	assert.Equal(t, mibName, stc.mibName)
-	assert.Equal(t, oidNum, stc.oidNum)
-	assert.Equal(t, oidText, stc.oidText)
-	assert.Equal(t, conversion, stc.conversion)
-	assert.Equal(t, err, stc.err)
-}
-
-func TestSnmpTranslateCache_hit(t *testing.T) {
-	snmpTranslateCaches = map[string]snmpTranslateCache{
-		"foo": snmpTranslateCache{
-			mibName:    "a",
-			oidNum:     "b",
-			oidText:    "c",
-			conversion: "d",
-			err:        fmt.Errorf("e"),
-		},
-	}
-	mibName, oidNum, oidText, conversion, err := snmpTranslate("foo")
-	assert.Equal(t, "a", mibName)
-	assert.Equal(t, "b", oidNum)
-	assert.Equal(t, "c", oidText)
-	assert.Equal(t, "d", conversion)
-	assert.Equal(t, fmt.Errorf("e"), err)
-	snmpTranslateCaches = nil
-}
-
-func TestSnmpTableCache_miss(t *testing.T) {
-	snmpTableCaches = nil
-	oid := ".1.0.0.0"
-	mibName, oidNum, oidText, fields, err := snmpTable(oid)
-	assert.Len(t, snmpTableCaches, 1)
-	stc := snmpTableCaches[oid]
-	require.NotNil(t, stc)
-	assert.Equal(t, mibName, stc.mibName)
-	assert.Equal(t, oidNum, stc.oidNum)
-	assert.Equal(t, oidText, stc.oidText)
-	assert.Equal(t, fields, stc.fields)
-	assert.Equal(t, err, stc.err)
-}
-
-func TestSnmpTableCache_hit(t *testing.T) {
-	snmpTableCaches = map[string]snmpTableCache{
-		"foo": snmpTableCache{
-			mibName: "a",
-			oidNum:  "b",
-			oidText: "c",
-			fields:  []Field{{Name: "d"}},
-			err:     fmt.Errorf("e"),
-		},
-	}
-	mibName, oidNum, oidText, fields, err := snmpTable("foo")
-	assert.Equal(t, "a", mibName)
-	assert.Equal(t, "b", oidNum)
-	assert.Equal(t, "c", oidText)
-	assert.Equal(t, []Field{{Name: "d"}}, fields)
-	assert.Equal(t, fmt.Errorf("e"), err)
-}
-
 func TestError(t *testing.T) {
 	e := fmt.Errorf("nested error")
 	err := Errorf(e, "top error %d", 123)

plugins/inputs/usgs/README.md

@@ -0,0 +1,92 @@
+# USGS Telegraf plugin
+
+This plugin gathers the recent earthquake data from the USGS and turns it into Telegraf metric format. The JSON polled from USGS looks as follows:
+
+```json
+{
+  "type": "FeatureCollection",
+  "metadata": {
+    "generated": 1481144380000,
+    "url": "http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_hour.geojson",
+    "title": "USGS All Earthquakes, Past Hour",
+    "status": 200,
+    "api": "1.5.2",
+    "count": 4
+  },
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {
+        "mag": 1.82,
+        "place": "15km ENE of Hawaiian Ocean View, Hawaii",
+        "time": 1481143731250,
+        "updated": 1481143943070,
+        "tz": -600,
+        "url": "http://earthquake.usgs.gov/earthquakes/eventpage/hv61510176",
+        "detail": "http://earthquake.usgs.gov/earthquakes/feed/v1.0/detail/hv61510176.geojson",
+        "felt": null,
+        "cdi": null,
+        "mmi": null,
+        "alert": null,
+        "status": "automatic",
+        "tsunami": 0,
+        "sig": 51,
+        "net": "hv",
+        "code": "61510176",
+        "ids": ",hv61510176,",
+        "sources": ",hv,",
+        "types": ",general-link,geoserve,origin,phase-data,",
+        "nst": 32,
+        "dmin": 0.07161,
+        "rms": 0.24,
+        "gap": 106,
+        "magType": "md",
+        "type": "earthquake",
+        "title": "M 1.8 - 15km ENE of Hawaiian Ocean View, Hawaii"
+      },
+      "geometry": {
+        "type": "Point",
+        "coordinates": [
+          -155.6236725,
+          19.1058331,
+          0.87
+        ]
+      },
+      "id": "hv61510176"
+    }
+  ],
+  "bbox": [
+    -155.6236725,
+    19.1058331,
+    0.87,
+    -117.025,
+    64.9877,
+    13.47
+  ]
+}
+```
+
+Each `Feature` is then converted into a point in InfluxDB:
+
+```yaml
+measurement: "earthquakes"
+tags:
+- magnitude: 1.82,
+- url: "http://earthquake.usgs.gov/earthquakes/eventpage/hv61510176",
+- detail: "http://earthquake.usgs.gov/earthquakes/feed/v1.0/detail/hv61510176.geojson",
+- felt: null,
+- cdi: null,
+- mmi: null,
+- alert: null,
+- status: "automatic",
+- tsunami: 0,
+- sig: 51,
+- net: "hv",
+- nst: 32,
+- dmin: 0.07161,
+- rms: 0.24,
+- gap: 106,
+- magType: "md",
+- type: "earthquake",
+- title: "M 1.8 - 15km ENE of Hawaiian Ocean View, Hawaii"
+```

plugins/inputs/usgs/usgs.go

@@ -0,0 +1,171 @@
+package usgs
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"math"
+	"net/http"
+	"time"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/plugins/inputs"
+)
+
+// USGS is the top level struct for this plugin
+type USGS struct {
+	Ok bool
+}
+
+// Description contains a decription of the Plugin's function
+func (gs *USGS) Description() string {
+	return "a plugin to gather USGS earthquake data"
+}
+
+// SampleConfig returns a sample configuration for the plugin
+func (gs *USGS) SampleConfig() string {
+	return ""
+}
+
+// Gather makes the HTTP call and converts the data
+func (gs *USGS) Gather(acc telegraf.Accumulator) error {
+	resp, err := http.Get("https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_hour.geojson")
+	if err != nil {
+		return err
+	}
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+	eqs := &Resp{}
+	err = json.Unmarshal(body, eqs)
+	if err != nil {
+		return err
+	}
+	meas := "usgsdata"
+	for _, feat := range eqs.Features {
+		fields := map[string]interface{}{
+			// Event latitude
+			"lat": feat.Geometry.Coordinates[0],
+			// Event longitude
+			"lng": feat.Geometry.Coordinates[1],
+			// Event depth
+			"depth": feat.Geometry.Coordinates[2],
+			// Earthquake intensity: http://earthquake.usgs.gov/learn/topics/mag_vs_int.php
+			"intensity": feat.Properties.Cdi,
+			// Link to detail for this Feature
+			"detail": feat.Properties.Detail,
+			// Horizontal distance from the epicenter to the nearest station (in degrees). 1 degree is approximately 111.2 kilometers.
+			"dmin": feat.Properties.Dmin,
+			// The total number of felt reports submitted to the DYFI? system.
+			"felt": feat.Properties.Felt,
+			// The largest azimuthal gap between azimuthally adjacent stations (in degrees). In general, the smaller this number, the more reliable
+			"gap": int(feat.Properties.Gap),
+			// The magnitude for the event
+			"magnitude": feat.Properties.Mag,
+			// Method of magnitude calculation: https://earthquake.usgs.gov/data/comcat/data-eventterms.php#magType
+			"magnitudeType": feat.Properties.MagType,
+			// The maximum estimated instrumental intensity for the event.
+			"maxIntensity": feat.Properties.Mmi,
+			// Human readable place name
+			"place": feat.Properties.Place,
+			// A number describing how significant the event is. Larger numbers indicate a more significant event.
+			"significance": int(feat.Properties.Sig),
+			// Link to USGS Event Page for event.
+			"usgsEventPage": feat.Properties.URL,
+		}
+		tags := map[string]string{
+			"latInt": coordToString(feat.Geometry.Coordinates[0]),
+			"lngInt": coordToString(feat.Geometry.Coordinates[1]),
+			// Alert is “green”, “yellow”, “orange”, “red”
+			"alert": toString(feat.Properties.Alert),
+			// The total number of seismic stations used to determine earthquake location.
+			"numStations": toString(feat.Properties.Nst),
+			// Indicates whether the event has been reviewed by a human -> “automatic”, “reviewed”, “deleted”
+			"reviewStatus": toString(feat.Properties.Status),
+			// This flag is set to "1" for large events in oceanic regions and "0" otherwise.
+			"tsunami": toString(feat.Properties.Tsunami),
+			// Type of siesmic event “earthquake”, “quarry”
+			"eventType": toString(feat.Properties.Type),
+			// UTC offset for event Timezone
+			"utcOffset": toString(feat.Properties.Tz),
+		}
+
+		var t time.Time
+		// Convert interface to int64
+		updated := feat.Properties.Updated
+		// Convert interface to int64
+		original := feat.Properties.Time
+		// If the event has been more reciently updated use that as the timestamp
+		if updated > original {
+			t = time.Unix(0, updated*int64(time.Millisecond))
+		} else {
+			t = time.Unix(0, original*int64(time.Millisecond))
+		}
+		acc.AddFields(meas, fields, tags, t)
+	}
+	return nil
+}
+
+func init() {
+	inputs.Add("usgs", func() telegraf.Input { return &USGS{} })
+}
+
+func toString(s interface{}) string {
+	return fmt.Sprintf("%v", s)
+}
+
+func coordToString(coord float64) string {
+	foo := math.Floor(coord)
+	return fmt.Sprintf("%d", int(foo))
+}
+
+// Resp is used to unmarshal the response body from USGS
+type Resp struct {
+	Type     string `json:"type"`
+	Metadata struct {
+		Generated int64  `json:"generated"`
+		URL       string `json:"url"`
+		Title     string `json:"title"`
+		Status    int    `json:"status"`
+		API       string `json:"api"`
+		Count     int    `json:"count"`
+	} `json:"metadata"`
+	Features []struct {
+		Type       string `json:"type"`
+		Properties struct {
+			Mag     float64 `json:"mag"`
+			Place   string  `json:"place"`
+			Time    int64   `json:"time"`
+			Updated int64   `json:"updated"`
+			Tz      float64 `json:"tz"`
+			URL     string  `json:"url"`
+			Detail  string  `json:"detail"`
+			Felt    float64 `json:"felt"`
+			Cdi     float64 `json:"cdi"`
+			Mmi     float64 `json:"mmi"`
+			Alert   string  `json:"alert"`
+			Status  string  `json:"status"`
+			Tsunami float64 `json:"tsunami"`
+			Sig     float64 `json:"sig"`
+			Net     string  `json:"net"`
+			Code    string  `json:"code"`
+			Ids     string  `json:"ids"`
+			Sources string  `json:"sources"`
+			Types   string  `json:"types"`
+			Nst     float64 `json:"nst"`
+			Dmin    float64 `json:"dmin"`
+			Rms     float64 `json:"rms"`
+			Gap     float64 `json:"gap"`
+			MagType string  `json:"magType"`
+			Type    string  `json:"type"`
+			Title   string  `json:"title"`
+		} `json:"properties"`
+		Geometry struct {
+			Type        string    `json:"type"`
+			Coordinates []float64 `json:"coordinates"`
+		} `json:"geometry"`
+		ID string `json:"id"`
+	} `json:"features"`
+	Bbox []float64 `json:"bbox"`
+}