Tests for the lustre plugin, initial commit

plugins/lustre2/lustre2_test.go

@@ -0,0 +1,144 @@
+package lustre2
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/influxdb/telegraf/testutil"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// Set config file variables to point to fake directory structure instead of /proc?
+
+const obdfilterProcContents = `snapshot_time             1438693064.430544 secs.usecs
+read_bytes                203238095 samples [bytes] 4096 1048576 78026117632000
+write_bytes               71893382 samples [bytes] 1 1048576 15201500833981
+get_info                  1182008495 samples [reqs]
+set_info_async            2 samples [reqs]
+connect                   1117 samples [reqs]
+reconnect                 1160 samples [reqs]
+disconnect                1084 samples [reqs]
+statfs                    3575885 samples [reqs]
+create                    698 samples [reqs]
+destroy                   3190060 samples [reqs]
+setattr                   605647 samples [reqs]
+punch                     805187 samples [reqs]
+sync                      6608753 samples [reqs]
+preprw                    275131477 samples [reqs]
+commitrw                  275131477 samples [reqs]
+quotactl                  229231 samples [reqs]
+ping                      78020757 samples [reqs]
+`
+
+const osdldiskfsProcContents = `snapshot_time             1438693135.640551 secs.usecs
+get_page                  275132812 samples [usec] 0 3147 1320420955 22041662259
+cache_access              19047063027 samples [pages] 1 1 19047063027
+cache_hit                 7393729777 samples [pages] 1 1 7393729777
+cache_miss                11653333250 samples [pages] 1 1 11653333250
+`
+
+const mdtProcContents = `snapshot_time             1438693238.20113 secs.usecs
+open                      1024577037 samples [reqs]
+close                     873243496 samples [reqs]
+mknod                     349042 samples [reqs]
+link                      445 samples [reqs]
+unlink                    3549417 samples [reqs]
+mkdir                     705499 samples [reqs]
+rmdir                     227434 samples [reqs]
+rename                    629196 samples [reqs]
+getattr                   1503663097 samples [reqs]
+setattr                   1898364 samples [reqs]
+getxattr                  6145349681 samples [reqs]
+setxattr                  83969 samples [reqs]
+statfs                    2916320 samples [reqs]
+sync                      434081 samples [reqs]
+samedir_rename            259625 samples [reqs]
+crossdir_rename           369571 samples [reqs]
+`
+
+type metrics struct {
+	name  string
+	value uint64
+}
+
+func TestLustre2GeneratesMetrics(t *testing.T) {
+
+	tempdir := os.TempDir() + "/telegraf/proc/fs/lustre/"
+	ost_name := "OST0001"
+
+	mdtdir := tempdir + "/mdt/"
+	err := os.MkdirAll(mdtdir+"/"+ost_name, 0755)
+	require.NoError(t, err)
+
+	osddir := tempdir + "/osd-ldiskfs/"
+	err = os.MkdirAll(osddir+"/"+ost_name, 0755)
+	require.NoError(t, err)
+
+	obddir := tempdir + "/obdfilter/"
+	err = os.MkdirAll(obddir+"/"+ost_name, 0755)
+	require.NoError(t, err)
+
+	err = ioutil.WriteFile(mdtdir+"/"+ost_name+"/md_stats", []byte(mdtProcContents), 0644)
+	require.NoError(t, err)
+
+	err = ioutil.WriteFile(osddir+"/"+ost_name+"/stats", []byte(osdldiskfsProcContents), 0644)
+	require.NoError(t, err)
+
+	err = ioutil.WriteFile(obddir+"/"+ost_name+"/stats", []byte(obdfilterProcContents), 0644)
+	require.NoError(t, err)
+
+	m := &Lustre2{
+		Ost_procfiles: []string{obddir + "/*/stats", osddir + "/*/stats"},
+		Mds_procfiles: []string{mdtdir + "/*/md_stats"},
+	}
+
+	var acc testutil.Accumulator
+
+	err = m.Gather(&acc)
+	require.NoError(t, err)
+
+	tags := map[string]string{
+		"name": ost_name,
+	}
+
+	intMetrics := []*metrics{
+		{
+			name:  "write_bytes",
+			value: 15201500833981,
+		},
+		{
+			name:  "read_bytes",
+			value: 78026117632000,
+		},
+		{
+			name:  "write_calls",
+			value: 71893382,
+		},
+		{
+			name:  "read_calls",
+			value: 203238095,
+		},
+		{
+			name:  "cache_hit",
+			value: 7393729777,
+		},
+		{
+			name:  "cache_access",
+			value: 19047063027,
+		},
+		{
+			name:  "cache_miss",
+			value: 11653333250,
+		},
+	}
+
+	for _, metric := range intMetrics {
+		assert.True(t, acc.HasUIntValue(metric.name), metric.name)
+		assert.True(t, acc.CheckTaggedValue(metric.name, metric.value, tags))
+	}
+
+	err = os.RemoveAll(os.TempDir() + "/telegraf")
+	require.NoError(t, err)
+}