diff --git a/components/engine/utils/tarsum_test.go b/components/engine/utils/tarsum_test.go new file mode 100644 index 0000000000..52ddd64590 --- /dev/null +++ b/components/engine/utils/tarsum_test.go @@ -0,0 +1,224 @@ +package utils + +import ( + "bytes" + "crypto/rand" + "fmt" + "github.com/dotcloud/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar" + "io" + "io/ioutil" + "os" + "testing" +) + +type testLayer struct { + filename string + options *sizedOptions + jsonfile string + gzip bool + tarsum string +} + +var testLayers = []testLayer{ + { + filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar", + jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json", + tarsum: "tarsum+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b"}, + { + filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar", + jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json", + gzip: true, + tarsum: "tarsum+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b"}, + { + filename: "testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/layer.tar", + jsonfile: "testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json", + tarsum: "tarsum+sha256:ac672ee85da9ab7f9667ae3c32841d3e42f33cc52c273c23341dabba1c8b0c8b"}, + { + options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory) + tarsum: "tarsum+sha256:8bf12d7e67c51ee2e8306cba569398b1b9f419969521a12ffb9d8875e8836738"}, +} + +type sizedOptions struct { + num int64 + size int64 + isRand bool + realFile bool +} + +// make a tar: +// * num is the number of files the tar should have +// * size is the bytes per file +// * isRand is whether the contents of the files should be a random chunk (otherwise it's all zeros) +// * realFile will write to a TempFile, instead of an in memory buffer +func sizedTar(opts sizedOptions) io.Reader { + var ( + fh io.ReadWriter + err error + ) + if opts.realFile { + fh, err = ioutil.TempFile("", "tarsum") + if err != nil { + return nil + } + } else { + fh = bytes.NewBuffer([]byte{}) + } + tarW := tar.NewWriter(fh) + for i := int64(0); i < opts.num; i++ { + err := tarW.WriteHeader(&tar.Header{ + Name: fmt.Sprintf("/testdata%d", i), + Mode: 0755, + Uid: 0, + Gid: 0, + Size: opts.size, + }) + if err != nil { + return nil + } + var rBuf []byte + if opts.isRand { + rBuf = make([]byte, 8) + _, err = rand.Read(rBuf) + if err != nil { + return nil + } + } else { + rBuf = []byte{0, 0, 0, 0, 0, 0, 0, 0} + } + + for i := int64(0); i < opts.size/int64(8); i++ { + tarW.Write(rBuf) + } + } + return fh +} + +func TestTarSums(t *testing.T) { + for _, layer := range testLayers { + var ( + fh io.Reader + err error + ) + if len(layer.filename) > 0 { + fh, err = os.Open(layer.filename) + if err != nil { + t.Errorf("failed to open %s: %s", layer.filename, err) + continue + } + } else if layer.options != nil { + fh = sizedTar(*layer.options) + } else { + // What else is there to test? + t.Errorf("what to do with %#V", layer) + continue + } + if file, ok := fh.(*os.File); ok { + defer file.Close() + } + + // double negatives! + ts := &TarSum{Reader: fh, DisableCompression: !layer.gzip} + _, err = io.Copy(ioutil.Discard, ts) + if err != nil { + t.Errorf("failed to copy from %s: %s", layer.filename, err) + continue + } + var gotSum string + if len(layer.jsonfile) > 0 { + jfh, err := os.Open(layer.jsonfile) + if err != nil { + t.Errorf("failed to open %s: %s", layer.jsonfile, err) + continue + } + buf, err := ioutil.ReadAll(jfh) + if err != nil { + t.Errorf("failed to readAll %s: %s", layer.jsonfile, err) + continue + } + gotSum = ts.Sum(buf) + } else { + gotSum = ts.Sum(nil) + } + + if layer.tarsum != gotSum { + t.Errorf("expecting [%s], but got [%s]", layer.tarsum, gotSum) + } + } +} + +func Benchmark9kTar(b *testing.B) { + buf := bytes.NewBuffer([]byte{}) + fh, err := os.Open("testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar") + if err != nil { + b.Error(err) + return + } + n, err := io.Copy(buf, fh) + fh.Close() + + b.SetBytes(n) + b.ResetTimer() + for i := 0; i < b.N; i++ { + ts := &TarSum{Reader: buf, DisableCompression: true} + io.Copy(ioutil.Discard, ts) + ts.Sum(nil) + } +} + +func Benchmark9kTarGzip(b *testing.B) { + buf := bytes.NewBuffer([]byte{}) + fh, err := os.Open("testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar") + if err != nil { + b.Error(err) + return + } + n, err := io.Copy(buf, fh) + fh.Close() + + b.SetBytes(n) + b.ResetTimer() + for i := 0; i < b.N; i++ { + ts := &TarSum{Reader: buf, DisableCompression: false} + io.Copy(ioutil.Discard, ts) + ts.Sum(nil) + } +} + +// this is a single big file in the tar archive +func Benchmark1mbSingleFileTar(b *testing.B) { + benchmarkTar(b, sizedOptions{1, 1024 * 1024, true, true}, false) +} + +// this is a single big file in the tar archive +func Benchmark1mbSingleFileTarGzip(b *testing.B) { + benchmarkTar(b, sizedOptions{1, 1024 * 1024, true, true}, true) +} + +// this is 1024 1k files in the tar archive +func Benchmark1kFilesTar(b *testing.B) { + benchmarkTar(b, sizedOptions{1024, 1024, true, true}, false) +} + +// this is 1024 1k files in the tar archive +func Benchmark1kFilesTarGzip(b *testing.B) { + benchmarkTar(b, sizedOptions{1024, 1024, true, true}, true) +} + +func benchmarkTar(b *testing.B, opts sizedOptions, isGzip bool) { + var fh *os.File + tarReader := sizedTar(opts) + if br, ok := tarReader.(*os.File); ok { + fh = br + } + defer os.Remove(fh.Name()) + defer fh.Close() + + b.SetBytes(opts.size * opts.num) + b.ResetTimer() + for i := 0; i < b.N; i++ { + ts := &TarSum{Reader: fh, DisableCompression: !isGzip} + io.Copy(ioutil.Discard, ts) + ts.Sum(nil) + fh.Seek(0, 0) + } +} diff --git a/components/engine/utils/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json b/components/engine/utils/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json new file mode 100644 index 0000000000..0f0ba4974d --- /dev/null +++ b/components/engine/utils/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json @@ -0,0 +1 @@ +{"id":"46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457","parent":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","created":"2014-04-07T02:45:52.610504484Z","container":"e0f07f8d72cae171a3dcc35859960e7e956e0628bce6fedc4122bf55b2c287c7","container_config":{"Hostname":"88807319f25e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["/bin/sh","-c","sed -ri 's/^(%wheel.*)(ALL)$/\\1NOPASSWD: \\2/' /etc/sudoers"],"Image":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"docker_version":"0.9.1-dev","config":{"Hostname":"88807319f25e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":null,"Image":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"architecture":"amd64","os":"linux","Size":3425} \ No newline at end of file diff --git a/components/engine/utils/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar b/components/engine/utils/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar new file mode 100644 index 0000000000..dfd5c204ae Binary files /dev/null and b/components/engine/utils/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar differ diff --git a/components/engine/utils/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json b/components/engine/utils/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json new file mode 100644 index 0000000000..12c18a076f --- /dev/null +++ b/components/engine/utils/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json @@ -0,0 +1 @@ +{"id":"511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158","comment":"Imported from -","created":"2013-06-13T14:03:50.821769-07:00","container_config":{"Hostname":"","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":null,"Image":"","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":null},"docker_version":"0.4.0","architecture":"x86_64","Size":0} \ No newline at end of file diff --git a/components/engine/utils/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/layer.tar b/components/engine/utils/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/layer.tar new file mode 100644 index 0000000000..880b3f2c56 Binary files /dev/null and b/components/engine/utils/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/layer.tar differ