112 lines
3.3 KiB
Go
112 lines
3.3 KiB
Go
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//go:build linux
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package bcache
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import (
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"os"
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/influxdata/telegraf/testutil"
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)
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const (
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dirtyData = "1.5G"
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bypassed = "4.7T"
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cacheBypassHits = "146155333"
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cacheBypassMisses = "0"
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cacheHitRatio = "90"
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cacheHits = "511469583"
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cacheMissCollisions = "157567"
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cacheMisses = "50616331"
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cacheReadaheads = "2"
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)
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func TestBcacheGeneratesMetrics(t *testing.T) {
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tmpDir := t.TempDir()
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testBcachePath := tmpDir + "/telegraf-bcache/sys/fs/bcache"
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testBcacheUUIDPath := testBcachePath + "/663955a3-765a-4737-a9fd-8250a7a78411"
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testBcacheDevPath := tmpDir + "/telegraf/sys/devices/virtual/block/bcache0"
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testBcacheBackingDevPath := tmpDir + "/telegraf/sys/devices/virtual/block/md10"
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err := os.MkdirAll(testBcacheUUIDPath, 0750)
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require.NoError(t, err)
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err = os.MkdirAll(testBcacheDevPath, 0750)
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require.NoError(t, err)
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err = os.MkdirAll(testBcacheBackingDevPath+"/bcache", 0750)
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require.NoError(t, err)
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err = os.Symlink(testBcacheBackingDevPath+"/bcache", testBcacheUUIDPath+"/bdev0")
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require.NoError(t, err)
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err = os.Symlink(testBcacheDevPath, testBcacheUUIDPath+"/bdev0/dev")
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require.NoError(t, err)
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err = os.MkdirAll(testBcacheUUIDPath+"/bdev0/stats_total", 0750)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/dirty_data", []byte(dirtyData), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/bypassed", []byte(bypassed), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/cache_bypass_hits", []byte(cacheBypassHits), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/cache_bypass_misses", []byte(cacheBypassMisses), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/cache_hit_ratio", []byte(cacheHitRatio), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/cache_hits", []byte(cacheHits), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/cache_miss_collisions", []byte(cacheMissCollisions), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/cache_misses", []byte(cacheMisses), 0640)
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require.NoError(t, err)
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err = os.WriteFile(testBcacheUUIDPath+"/bdev0/stats_total/cache_readaheads", []byte(cacheReadaheads), 0640)
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require.NoError(t, err)
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fields := map[string]interface{}{
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"dirty_data": uint64(1610612736),
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"bypassed": uint64(5167704440832),
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"cache_bypass_hits": uint64(146155333),
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"cache_bypass_misses": uint64(0),
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"cache_hit_ratio": uint64(90),
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"cache_hits": uint64(511469583),
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"cache_miss_collisions": uint64(157567),
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"cache_misses": uint64(50616331),
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"cache_readaheads": uint64(2),
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}
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tags := map[string]string{
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"backing_dev": "md10",
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"bcache_dev": "bcache0",
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}
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var acc testutil.Accumulator
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// all devs
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b := &Bcache{BcachePath: testBcachePath}
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err = b.Gather(&acc)
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require.NoError(t, err)
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acc.AssertContainsTaggedFields(t, "bcache", fields, tags)
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// one exist dev
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b = &Bcache{BcachePath: testBcachePath, BcacheDevs: []string{"bcache0"}}
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err = b.Gather(&acc)
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require.NoError(t, err)
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acc.AssertContainsTaggedFields(t, "bcache", fields, tags)
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}
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