package bcache import ( "io/ioutil" "os" "testing" "github.com/influxdata/telegraf/testutil" "github.com/stretchr/testify/require" ) const ( dirty_data = "1.5G" bypassed = "4.7T" cache_bypass_hits = "146155333" cache_bypass_misses = "0" cache_hit_ratio = "90" cache_hits = "511469583" cache_miss_collisions = "157567" cache_misses = "50616331" cache_readaheads = "2" ) var ( testBcachePath = os.TempDir() + "/telegraf/sys/fs/bcache" testBcacheUuidPath = testBcachePath + "/663955a3-765a-4737-a9fd-8250a7a78411" testBcacheDevPath = os.TempDir() + "/telegraf/sys/devices/virtual/block/bcache0" testBcacheBackingDevPath = os.TempDir() + "/telegraf/sys/devices/virtual/block/md10" ) func TestBcacheGeneratesMetrics(t *testing.T) { err := os.MkdirAll(testBcacheUuidPath, 0755) require.NoError(t, err) err = os.MkdirAll(testBcacheDevPath, 0755) require.NoError(t, err) err = os.MkdirAll(testBcacheBackingDevPath+"/bcache", 0755) require.NoError(t, err) err = os.Symlink(testBcacheBackingDevPath+"/bcache", testBcacheUuidPath+"/bdev0") require.NoError(t, err) err = os.Symlink(testBcacheDevPath, testBcacheUuidPath+"/bdev0/dev") require.NoError(t, err) err = os.MkdirAll(testBcacheUuidPath+"/bdev0/stats_total", 0755) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/dirty_data", []byte(dirty_data), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/bypassed", []byte(bypassed), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/cache_bypass_hits", []byte(cache_bypass_hits), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/cache_bypass_misses", []byte(cache_bypass_misses), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/cache_hit_ratio", []byte(cache_hit_ratio), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/cache_hits", []byte(cache_hits), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/cache_miss_collisions", []byte(cache_miss_collisions), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/cache_misses", []byte(cache_misses), 0644) require.NoError(t, err) err = ioutil.WriteFile(testBcacheUuidPath+"/bdev0/stats_total/cache_readaheads", []byte(cache_readaheads), 0644) require.NoError(t, err) fields := map[string]interface{}{ "dirty_data": uint64(1610612736), "bypassed": uint64(5167704440832), "cache_bypass_hits": uint64(146155333), "cache_bypass_misses": uint64(0), "cache_hit_ratio": uint64(90), "cache_hits": uint64(511469583), "cache_miss_collisions": uint64(157567), "cache_misses": uint64(50616331), "cache_readaheads": uint64(2), } tags := map[string]string{ "backing_dev": "md10", "bcache_dev": "bcache0", } var acc testutil.Accumulator // all devs b := &Bcache{BcachePath: testBcachePath} err = b.Gather(&acc) require.NoError(t, err) acc.AssertContainsTaggedFields(t, "bcache", fields, tags) // one exist dev b = &Bcache{BcachePath: testBcachePath, BcacheDevs: []string{"bcache0"}} err = b.Gather(&acc) require.NoError(t, err) acc.AssertContainsTaggedFields(t, "bcache", fields, tags) err = os.RemoveAll(os.TempDir() + "/telegraf") require.NoError(t, err) }