From a5d020fb3edf3fb4dabae386def6b5d982c4f7a6 Mon Sep 17 00:00:00 2001 From: Peter Viertel Date: Thu, 4 Feb 2021 14:18:21 +1100 Subject: [PATCH 1/3] New logging detail - refactor source layout for go modules and go 1.15 --- .gitignore | 1 + .travis.yml | 4 +- Gopkg.lock | 228 --------- Gopkg.toml | 15 - Makefile | 26 +- .../main.go => docker-socket-firewall.go | 172 +++++-- docker-socket-firewall_test.go | 188 ++++++++ go.mod | 16 + go.sum | 449 ++++++++++++++++++ hack/build.sh | 69 --- {pkg/opa => opa}/opa.go | 25 +- opa/opa_test.go | 76 +++ pkg/opa/opa_test.go | 77 --- 13 files changed, 894 insertions(+), 452 deletions(-) create mode 100644 .gitignore delete mode 100644 Gopkg.lock delete mode 100644 Gopkg.toml rename cmd/docker-socket-firewall/main.go => docker-socket-firewall.go (62%) create mode 100644 docker-socket-firewall_test.go create mode 100644 go.mod create mode 100644 go.sum delete mode 100755 hack/build.sh rename {pkg/opa => opa}/opa.go (85%) create mode 100644 opa/opa_test.go delete mode 100644 pkg/opa/opa_test.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..88ddcdf --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +_output/ diff --git a/.travis.yml b/.travis.yml index 766296e..38df6b7 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,7 +1,5 @@ language: go go: - - "1.11.x" + - "1.15.x" before_install: - - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh - - dep ensure diff --git a/Gopkg.lock b/Gopkg.lock deleted file mode 100644 index 5e8b901..0000000 --- a/Gopkg.lock +++ /dev/null @@ -1,228 +0,0 @@ -# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'. - - -[[projects]] - digest = "1:f9ae348e1f793dcf9ed930ed47136a67343dbd6809c5c91391322267f4476892" - name = "github.com/Microsoft/go-winio" - packages = ["."] - pruneopts = "UT" - revision = "97e4973ce50b2ff5f09635a57e2b88a037aae829" - version = "v0.4.11" - -[[projects]] - branch = "master" - digest = "1:ed121120bafe4225e3f098b5da68494e696df449e8ea00c402f6e90c04dba998" - name = "github.com/OneOfOne/xxhash" - packages = ["."] - pruneopts = "UT" - revision = "74ace4fe5525ef62ce28d5093d6b0faaa6a575f3" - -[[projects]] - digest = "1:ffe9824d294da03b391f44e1ae8281281b4afc1bdaa9588c9097785e3af10cec" - name = "github.com/davecgh/go-spew" - packages = ["spew"] - pruneopts = "UT" - revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73" - version = "v1.1.1" - -[[projects]] - digest = "1:5a900d94d96d41ea116d7e6c46717fdf330f35d8bdd116798e2bc0c319f66565" - name = "github.com/docker/go-connections" - packages = ["sockets"] - pruneopts = "UT" - revision = "7395e3f8aa162843a74ed6d48e79627d9792ac55" - version = "v0.4.0" - -[[projects]] - branch = "master" - digest = "1:326b3646f45752b2917058d66f5a6921cf72fdf820d57576a11c8fc062f8ad4f" - name = "github.com/ghodss/yaml" - packages = ["."] - pruneopts = "UT" - revision = "c7ce16629ff4cd059ed96ed06419dd3856fd3577" - -[[projects]] - digest = "1:9ae31ce33b4bab257668963e844d98765b44160be4ee98cafc44637a213e530d" - name = "github.com/gobwas/glob" - packages = [ - ".", - "compiler", - "match", - "syntax", - "syntax/ast", - "syntax/lexer", - "util/runes", - "util/strings", - ] - pruneopts = "UT" - revision = "5ccd90ef52e1e632236f7326478d4faa74f99438" - version = "v0.2.3" - -[[projects]] - digest = "1:1dafdfd6b2d1103e1ef5c1c1255f395f3ceaceca327d3640d0f06039448bf85c" - name = "github.com/h2non/filetype" - packages = ["."] - pruneopts = "UT" - revision = "cc14fdc9ca0e4c2bafad7458f6ff79fd3947cfbb" - version = "v1.0.5" - -[[projects]] - digest = "1:0a69a1c0db3591fcefb47f115b224592c8dfa4368b7ba9fae509d5e16cdc95c8" - name = "github.com/konsorten/go-windows-terminal-sequences" - packages = ["."] - pruneopts = "UT" - revision = "5c8c8bd35d3832f5d134ae1e1e375b69a4d25242" - version = "v1.0.1" - -[[projects]] - digest = "1:1fd68ef578f8e76b9290672705c8e4a73088e68cf72a2841532ed4c34b3be6fa" - name = "github.com/open-policy-agent/opa" - packages = [ - "ast", - "internal/compiler/wasm", - "internal/compiler/wasm/opa", - "internal/ir", - "internal/leb128", - "internal/planner", - "internal/wasm/constant", - "internal/wasm/encoding", - "internal/wasm/instruction", - "internal/wasm/module", - "internal/wasm/opcode", - "internal/wasm/types", - "metrics", - "rego", - "storage", - "storage/inmem", - "topdown", - "topdown/builtins", - "topdown/copypropagation", - "types", - "util", - ] - pruneopts = "UT" - revision = "6c39555de1feda5b3650397b9a752bc59621c7ac" - version = "v0.10.1" - -[[projects]] - branch = "master" - digest = "1:9f6281d8f50290ba740db82fe5be52877936e47928cd67285ab31b490c202247" - name = "github.com/pkg/errors" - packages = ["."] - pruneopts = "UT" - revision = "059132a15dd08d6704c67711dae0cf35ab991756" - -[[projects]] - digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe" - name = "github.com/pmezard/go-difflib" - packages = ["difflib"] - pruneopts = "UT" - revision = "792786c7400a136282c1664665ae0a8db921c6c2" - version = "v1.0.0" - -[[projects]] - branch = "master" - digest = "1:d38f81081a389f1466ec98192cf9115a82158854d6f01e1c23e2e7554b97db71" - name = "github.com/rcrowley/go-metrics" - packages = ["."] - pruneopts = "UT" - revision = "3113b8401b8a98917cde58f8bbd42a1b1c03b1fd" - -[[projects]] - digest = "1:69b1cc331fca23d702bd72f860c6a647afd0aa9fcbc1d0659b1365e26546dd70" - name = "github.com/sirupsen/logrus" - packages = ["."] - pruneopts = "UT" - revision = "bcd833dfe83d3cebad139e4a29ed79cb2318bf95" - version = "v1.2.0" - -[[projects]] - digest = "1:972c2427413d41a1e06ca4897e8528e5a1622894050e2f527b38ddf0f343f759" - name = "github.com/stretchr/testify" - packages = ["assert"] - pruneopts = "UT" - revision = "ffdc059bfe9ce6a4e144ba849dbedead332c6053" - version = "v1.3.0" - -[[projects]] - branch = "master" - digest = "1:0dfba983988bcd90e6dd30b9bfdb9685ff530dbf61db3706e55372e975b1d8bc" - name = "github.com/xi2/xz" - packages = ["."] - pruneopts = "UT" - revision = "48954b6210f8d154cb5f8484d3a3e1f83489309e" - -[[projects]] - branch = "master" - digest = "1:bc2a31092538ed0bdfe9c5c784d6caca3ea5236b690371698826753d2ffa6beb" - name = "github.com/yashtewari/glob-intersection" - packages = ["."] - pruneopts = "UT" - revision = "5c77d914dd0ba7bedca923f97232d37137e038f3" - -[[projects]] - branch = "master" - digest = "1:3f3a05ae0b95893d90b9b3b5afdb79a9b3d96e4e36e099d841ae602e4aca0da8" - name = "golang.org/x/crypto" - packages = ["ssh/terminal"] - pruneopts = "UT" - revision = "3d3f9f413869b949e48070b5bc593aa22cc2b8f2" - -[[projects]] - branch = "master" - digest = "1:454c8e6f500af83a7d01f5848407f7de7ba17015bbf3b29e67a2b66719b764be" - name = "golang.org/x/net" - packages = [ - "context/ctxhttp", - "internal/socks", - "proxy", - ] - pruneopts = "UT" - revision = "610586996380ceef02dd726cc09df7e00a3f8e56" - -[[projects]] - branch = "master" - digest = "1:f343f077a5b0bc3a3788b3a04e24dd417e3e25b2acb529c413e212d2c42416ef" - name = "golang.org/x/sys" - packages = [ - "unix", - "windows", - ] - pruneopts = "UT" - revision = "62eef0e2fa9b2c385f7b2778e763486da6880d37" - -[[projects]] - digest = "1:1b9d6106326573c0212b29c1796f128271278474ed629055645ace928faaea67" - name = "gopkg.in/h2non/filetype.v1" - packages = [ - "matchers", - "types", - ] - pruneopts = "UT" - revision = "cc14fdc9ca0e4c2bafad7458f6ff79fd3947cfbb" - version = "v1.0.5" - -[[projects]] - digest = "1:342378ac4dcb378a5448dd723f0784ae519383532f5e70ade24132c4c8693202" - name = "gopkg.in/yaml.v2" - packages = ["."] - pruneopts = "UT" - revision = "5420a8b6744d3b0345ab293f6fcba19c978f1183" - version = "v2.2.1" - -[solve-meta] - analyzer-name = "dep" - analyzer-version = 1 - input-imports = [ - "github.com/docker/go-connections/sockets", - "github.com/h2non/filetype", - "github.com/open-policy-agent/opa/rego", - "github.com/pkg/errors", - "github.com/sirupsen/logrus", - "github.com/stretchr/testify/assert", - "github.com/xi2/xz", - "golang.org/x/net/context/ctxhttp", - "gopkg.in/h2non/filetype.v1/matchers", - ] - solver-name = "gps-cdcl" - solver-version = 1 diff --git a/Gopkg.toml b/Gopkg.toml deleted file mode 100644 index ff629ec..0000000 --- a/Gopkg.toml +++ /dev/null @@ -1,15 +0,0 @@ -[[constraint]] - name = "github.com/open-policy-agent/opa" - version = "0.10.1" - -[[constraint]] - branch = "master" - name = "github.com/pkg/errors" - -[[constraint]] - branch = "master" - name = "github.com/tv42/httpunix" - -[prune] - go-tests = true - unused-packages = true diff --git a/Makefile b/Makefile index bcae6c0..c2310d8 100644 --- a/Makefile +++ b/Makefile @@ -1,12 +1,13 @@ .DEFAULT_GOAL := ci BIN ?= docker-socket-firewall PKG := github.com/linead/docker-socket-firewall +GIT_DIRTY := $(shell test -n "$(git status -z .)" || echo -dirty) +GIT_INFO := $(shell git describe --tags --always)$(GIT_DIRTY) +LDFLAGS = "-X main.gitInfo=${GIT_INFO}" local : ARCH ?= $(shell go env GOOS)-$(shell go env GOARCH) ARCH ?= linux-amd64 -SRC_DIRS := cmd pkg # directories which hold app source (not vendored) - CLI_PLATFORMS := linux-amd64 darwin-amd64 platform_temp = $(subst -, ,$(ARCH)) @@ -17,29 +18,20 @@ VERSION ?= master local: build-dirs GOOS=$(GOOS) \ GOARCH=$(GOARCH) \ - VERSION=$(VERSION) \ - PKG=$(PKG) \ - BIN=$(BIN) \ - OUTPUT_DIR=$$(pwd)/_output/bin/$(GOOS)/$(GOARCH) \ - ./hack/build.sh + go build -ldflags $(LDFLAGS) + mv $(BIN) _output/bin/$(GOOS)/$(GOARCH)/ mac: GOOS=darwin \ GOARCH=amd64 \ - VERSION=$(VERSION) \ - PKG=$(PKG) \ - BIN=$(BIN) \ - OUTPUT_DIR=$$(pwd)/_output/bin/linux/amd64 \ - ./hack/build.sh + go build -ldflags $(LDFLAGS) + mv $(BIN) _output/bin/darwin/amd64/ linux: GOOS=linux \ GOARCH=amd64 \ - VERSION=$(VERSION) \ - PKG=$(PKG) \ - BIN=$(BIN) \ - OUTPUT_DIR=$$(pwd)/_output/bin/linux/amd64 \ - ./hack/build.sh + go build -ldflags $(LDFLAGS) + mv $(BIN) _output/bin/linux/amd64/ tests: go test -covermode=count ./... diff --git a/cmd/docker-socket-firewall/main.go b/docker-socket-firewall.go similarity index 62% rename from cmd/docker-socket-firewall/main.go rename to docker-socket-firewall.go index 6b47d0f..83ff237 100644 --- a/cmd/docker-socket-firewall/main.go +++ b/docker-socket-firewall.go @@ -8,26 +8,30 @@ import ( "compress/gzip" "context" "flag" - "github.com/docker/go-connections/sockets" - "github.com/h2non/filetype" - "github.com/linead/docker-socket-firewall/pkg/opa" - "github.com/pkg/errors" - log "github.com/sirupsen/logrus" - "github.com/xi2/xz" - "golang.org/x/net/context/ctxhttp" - "gopkg.in/h2non/filetype.v1/matchers" + "fmt" "io" "io/ioutil" "net" "net/http" "net/http/httputil" "os" + "path/filepath" "regexp" "time" + + "github.com/linead/docker-socket-firewall/opa" + + "github.com/docker/go-connections/sockets" + "github.com/h2non/filetype" + "github.com/h2non/filetype/matchers" + log "github.com/sirupsen/logrus" + "github.com/xi2/xz" + "golang.org/x/net/context/ctxhttp" ) var opaHandler opa.DockerHandler var targetSocket string +var gitInfo string /* Reverse Proxy Logic @@ -58,7 +62,7 @@ func serveReverseProxy(w http.ResponseWriter, req *http.Request) { resp, err := ctxhttp.Do(req.Context(), client, req) if err != nil { - log.Warnf("Error %v", err) + log.Error(err) return } @@ -185,7 +189,7 @@ func copyBuffer(dst io.Writer, src io.Reader) (int64, error) { if nr != nw { return written, io.ErrShortWrite } - flushResponse(dst); + flushResponse(dst) } if rerr != nil { if rerr == io.EOF { @@ -224,23 +228,23 @@ func verifyBuildInstruction(req *http.Request) (bool, error) { var tr *tar.Reader - if(filetype.IsType(head, matchers.TypeGz)) { - gzip_reader, _ := gzip.NewReader(b1) - tr = tar.NewReader(gzip_reader) - } else if(filetype.IsType(head, matchers.TypeBz2)) { - bz2_reader := bzip2.NewReader(b1) - tr = tar.NewReader(bz2_reader) - } else if(filetype.IsType(head, matchers.TypeXz)) { - xz_reader, _ := xz.NewReader(b1, 0) - tr = tar.NewReader(xz_reader) - } else if(filetype.IsType(head, matchers.TypeTar)) { + if filetype.IsType(head, matchers.TypeGz) { + gzipReader, _ := gzip.NewReader(b1) + tr = tar.NewReader(gzipReader) + } else if filetype.IsType(head, matchers.TypeBz2) { + bz2Reader := bzip2.NewReader(b1) + tr = tar.NewReader(bz2Reader) + } else if filetype.IsType(head, matchers.TypeXz) { + xzReader, _ := xz.NewReader(b1, 0) + tr = tar.NewReader(xzReader) + } else if filetype.IsType(head, matchers.TypeTar) { tr = tar.NewReader(b1) } dockerfileLoc := req.URL.Query().Get("dockerfile") if dockerfileLoc == "" { - dockerfileLoc = "Dockerfile"; + dockerfileLoc = "Dockerfile" } var valid = false @@ -269,7 +273,6 @@ func verifyBuildInstruction(req *http.Request) (bool, error) { // Given a request send it to the appropriate url if it validates func handleRequestAndRedirect(res http.ResponseWriter, req *http.Request) { - log.Debugf("Received Request: %s", req.URL.Path) matched, _ := regexp.MatchString("^(/v[\\d\\.]+)?/build$", req.URL.Path) var err error @@ -287,21 +290,34 @@ func handleRequestAndRedirect(res http.ResponseWriter, req *http.Request) { } if allowed { + log.WithFields(log.Fields{ + "request": req.URL.Path, + "disposition": "PERMIT", + }).Debug("docker-socket-firewall") + serveReverseProxy(res, req) } else { - http.Error(res, "Authorization denied", http.StatusForbidden) + http.Error(res, "Authorization denied", http.StatusUnavailableForLegalReasons) + log.WithFields(log.Fields{ + "request": req.URL.Path, + "disposition": "DENIED", + }).Debug("docker-socket-firewall") } } func listenAndServe(sockPath string) error { + log.Tracef("initialising named pipe: %s", sockPath) http.HandleFunc("/", handleRequestAndRedirect) l, err := net.Listen("unix", sockPath) if err != nil { - return errors.Wrap(err, "failed to listen") + return err + } + err = os.Chmod(sockPath, 0777) + if err != nil { + return err } - os.Chmod(sockPath, 0777) - + log.Tracef("entering http listener on socket at: %s", sockPath) return http.Serve(l, nil) } @@ -312,6 +328,34 @@ func flushResponse(w io.Writer) { } } +func setupLogFile(logPath string) { + oPath := logPath + ".0" + + logFile := filepath.Clean(logPath) + oFile := filepath.Clean(oPath) + + if fInfo, err := os.Stat(logFile); err == nil { + if fInfo.Size() > 10*1024*1024 { + //rollover the logfile before opening + log.Infof("logfile %s > 10Mib, rotating to %s", logFile, oFile) + if err := os.Rename(logFile, oFile); err != nil { + log.Error(err) + } + } + } + + f, err := os.OpenFile(logFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644) + if err != nil { + log.WithFields(log.Fields{ + "err": err, + "logfile": logFile, + }).Fatal("error opening logdest") + } + + log.SetFormatter(&log.JSONFormatter{}) + log.SetOutput(f) +} + /* Entry */ @@ -320,35 +364,91 @@ func main() { var hostSocket string var policyDir string + var logFile string - flag.StringVar(&targetSocket, "target", "/var/run/docker.sock", "The docker socket to connect to") - flag.StringVar(&hostSocket, "host", "/var/run/protected-docker.sock", "The docker socket to listen on") - flag.StringVar(&policyDir, "policyDir", "/etc/docker", "The directory containing the OPA policies") + flag.StringVar(&targetSocket, "target", "docker.sock", "The docker socket to connect to") + flag.StringVar(&hostSocket, "host", "docker-proxy.sock", "The docker socket to listen on") + flag.StringVar(&policyDir, "policyDir", "testpolicy", "The directory containing the OPA policies") + flag.StringVar(&logFile, "log", "STDOUT", "path to divert stdout to") printUsage := flag.Bool("usage", false, "Print usage information") - verbose := flag.Bool("verbose", false, "Print debug logging") + verbose := flag.Bool("verbose", false, "Print debug level logging") + trace := flag.Bool("trace", false, "Print trace level logging") + version := flag.Bool("version", false, "only show version") flag.Parse() + //show version and exit cleanly + if *version { + fmt.Printf("%s\n", gitInfo) + os.Exit(0) + } + if *printUsage { flag.Usage() os.Exit(0) } + if logFile != "STDOUT" { + log.WithFields(log.Fields{ + "logfile": logFile, + }).Info("docker-socket-firewall started") + + setupLogFile(logFile) + } + + // have a way for admin to turn on tracing by touching this file + if _, err := os.Stat(filepath.Clean("/var/run/docker-socket-firewall.debug")); err == nil { + log.SetLevel(log.DebugLevel) + } + if _, err := os.Stat(filepath.Clean("/var/run/docker-socket-firewall.trace")); err == nil { + log.SetLevel(log.TraceLevel) + } if *verbose { log.SetLevel(log.DebugLevel) } + if *trace { + log.SetLevel(log.TraceLevel) + } - // clean up old sockets + // clean up old socket os.Remove(hostSocket) - opaHandler = &opa.DockerOpaHandler{ - policyDir + "/authz.rego", - policyDir + "/build.rego"} + proxyPolicyFile := filepath.Join(policyDir, "authz.rego") + buildPolicyFile := filepath.Join(policyDir, "build.rego") - log.Infof("Docker Firewall: %s -> %s, Policy Dir: %s", targetSocket, hostSocket, policyDir) + opaHandler = &opa.DockerOpaHandler{ + ProxyPolicyFile: proxyPolicyFile, + DockerfilePolicyFile: buildPolicyFile} + + log.WithFields(log.Fields{ + "revision": gitInfo, + "targetSocket": targetSocket, + "hostSocket": hostSocket, + "proxyPolicyFile": proxyPolicyFile, + "buildPolicyFile": buildPolicyFile, + }).Info("docker-socket-firewall init") + + // validate target socket + if tInfo, err := os.Lstat(targetSocket); err == nil { + tPipe := targetSocket + if tInfo.Mode()&os.ModeSymlink != 0 { + if t, err := os.Readlink(targetSocket); err == nil { + tPipe = t + log.Infof("%s is symlink to %s", targetSocket, tPipe) + } else { + log.Infof("%s is not symlink", targetSocket) + } + } + } else { + log.Warn(err) + } // start server if err := listenAndServe(hostSocket); err != nil { - log.Fatal("Unable to start firewalled socket") + log.WithFields(log.Fields{ + "err": err, + "hostSocket": hostSocket, + }).Fatal("error opening host named pipe") + } } diff --git a/docker-socket-firewall_test.go b/docker-socket-firewall_test.go new file mode 100644 index 0000000..ac57820 --- /dev/null +++ b/docker-socket-firewall_test.go @@ -0,0 +1,188 @@ +package main + +import ( + "bytes" + "io" + "net/http" + "testing" +) + +func Test_serveReverseProxy(t *testing.T) { + type args struct { + w http.ResponseWriter + req *http.Request + } + tests := []struct { + name string + args args + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + serveReverseProxy(tt.args.w, tt.args.req) + }) + } +} + +func Test_hijack(t *testing.T) { + type args struct { + req *http.Request + w http.ResponseWriter + } + tests := []struct { + name string + args args + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + hijack(tt.args.req, tt.args.w) + }) + } +} + +func Test_copyBuffer(t *testing.T) { + type args struct { + src io.Reader + } + tests := []struct { + name string + args args + want int64 + wantDst string + wantErr bool + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + dst := &bytes.Buffer{} + got, err := copyBuffer(dst, tt.args.src) + if (err != nil) != tt.wantErr { + t.Errorf("copyBuffer() error = %v, wantErr %v", err, tt.wantErr) + return + } + if got != tt.want { + t.Errorf("copyBuffer() = %v, want %v", got, tt.want) + } + if gotDst := dst.String(); gotDst != tt.wantDst { + t.Errorf("copyBuffer() = %v, want %v", gotDst, tt.wantDst) + } + }) + } +} + +func Test_copyHeader(t *testing.T) { + type args struct { + dst http.Header + src http.Header + } + tests := []struct { + name string + args args + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + copyHeader(tt.args.dst, tt.args.src) + }) + } +} + +func Test_verifyBuildInstruction(t *testing.T) { + type args struct { + req *http.Request + } + tests := []struct { + name string + args args + want bool + wantErr bool + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got, err := verifyBuildInstruction(tt.args.req) + if (err != nil) != tt.wantErr { + t.Errorf("verifyBuildInstruction() error = %v, wantErr %v", err, tt.wantErr) + return + } + if got != tt.want { + t.Errorf("verifyBuildInstruction() = %v, want %v", got, tt.want) + } + }) + } +} + +func Test_handleRequestAndRedirect(t *testing.T) { + type args struct { + res http.ResponseWriter + req *http.Request + } + tests := []struct { + name string + args args + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + handleRequestAndRedirect(tt.args.res, tt.args.req) + }) + } +} + +func Test_listenAndServe(t *testing.T) { + type args struct { + sockPath string + } + tests := []struct { + name string + args args + wantErr bool + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + if err := listenAndServe(tt.args.sockPath); (err != nil) != tt.wantErr { + t.Errorf("listenAndServe() error = %v, wantErr %v", err, tt.wantErr) + } + }) + } +} + +func Test_flushResponse(t *testing.T) { + tests := []struct { + name string + wantW string + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + w := &bytes.Buffer{} + flushResponse(w) + if gotW := w.String(); gotW != tt.wantW { + t.Errorf("flushResponse() = %v, want %v", gotW, tt.wantW) + } + }) + } +} + +func Test_main(t *testing.T) { + tests := []struct { + name string + }{ + // TODO: Add test cases. + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + main() + }) + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..ddb95de --- /dev/null +++ b/go.mod @@ -0,0 +1,16 @@ +module github.com/linead/docker-socket-firewall + +go 1.15 + +require ( + github.com/Microsoft/go-winio v0.4.16 // indirect + github.com/docker/go-connections v0.4.0 + github.com/h2non/filetype v1.1.0 + github.com/open-policy-agent/opa v0.25.2 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+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= +sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU= diff --git a/hack/build.sh b/hack/build.sh deleted file mode 100755 index e3171da..0000000 --- a/hack/build.sh +++ /dev/null @@ -1,69 +0,0 @@ -#!/bin/bash - -# Copyright 2016 The Kubernetes Authors. -# -# Licensed under the Apache License, Version 2.0 (the "License"); -# you may not use this file except in compliance with the License. -# You may obtain a copy of the License at -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and -# limitations under the License. - -set -o errexit -set -o nounset -set -o pipefail - -if [ -z "${PKG}" ]; then - echo "PKG must be set" - exit 1 -fi -if [ -z "${BIN}" ]; then - echo "BIN must be set" - exit 1 -fi -if [ -z "${GOOS}" ]; then - echo "GOOS must be set" - exit 1 -fi -if [ -z "${GOARCH}" ]; then - echo "GOARCH must be set" - exit 1 -fi -if [ -z "${VERSION}" ]; then - echo "VERSION must be set" - exit 1 -fi - -export CGO_ENABLED=0 - -GIT_SHA=$(git describe --tags --always) -GIT_DIRTY=$(git status --porcelain 2> /dev/null) -if [[ -z "${GIT_DIRTY}" ]]; then - GIT_TREE_STATE=clean -else - GIT_TREE_STATE=dirty -fi - -LDFLAGS="-X ${PKG}/pkg/buildinfo.Version=${VERSION}" -LDFLAGS="${LDFLAGS} -X ${PKG}/pkg/buildinfo.GitSHA=${GIT_SHA}" -LDFLAGS="${LDFLAGS} -X ${PKG}/pkg/buildinfo.GitTreeState=${GIT_TREE_STATE}" - -if [[ -z "${OUTPUT_DIR:-}" ]]; then - OUTPUT_DIR=. -fi -OUTPUT=${OUTPUT_DIR}/${BIN} -if [[ "${GOOS}" = "windows" ]]; then - OUTPUT="${OUTPUT}.exe" -fi - -go build \ - -o ${OUTPUT} \ - -installsuffix "static" \ - -ldflags "${LDFLAGS}" \ - ${PKG}/cmd/${BIN} - diff --git a/pkg/opa/opa.go b/opa/opa.go similarity index 85% rename from pkg/opa/opa.go rename to opa/opa.go index e14ce4c..4aeae26 100644 --- a/pkg/opa/opa.go +++ b/opa/opa.go @@ -17,7 +17,7 @@ import ( log "github.com/sirupsen/logrus" ) -//DockerHandler validates either a regular request or a build request (with supplied dockerfile) +// DockerHandler validates either a regular request or a build request (with supplied dockerfile) type DockerHandler interface { ValidateRequest(r *http.Request) (bool, error) ValidateDockerFile(r *http.Request, dockerFile string) (bool, error) @@ -75,8 +75,11 @@ func processPolicy(ctx context.Context, policyFile string, policyPath string, in return false, err } - pretty, _ := json.MarshalIndent(input, "", " ") - log.Debugf("Querying OPA policy %v. Input: %s", policyPath, pretty) + // pretty, _ := json.MarshalIndent(input, "", " ") + log.WithFields(log.Fields{ + "policy": policyPath, + "request": input, + }).Trace("Querying OPA policy") allowed, err := func() (bool, error) { eval := rego.New( @@ -87,28 +90,36 @@ func processPolicy(ctx context.Context, policyFile string, policyPath string, in rs, err := eval.Eval(ctx) if err != nil { + log.Trace(err) return false, err } if len(rs) == 0 { - // Decision is undefined. Fallback to deny. + log.Trace("OPA undefined result - fallback to deny") return false, nil } + log.WithFields(log.Fields{ + "policy": policyPath, + "resultSet": rs, + }).Trace("OPA Decision") + allowed, ok := rs[0].Expressions[0].Value.(bool) + if !ok { - return false, fmt.Errorf("administrative policy decision invalid") + log.Trace("OPA administrative policy decision invalid") + return false, fmt.Errorf("OPA administrative policy decision invalid") } return allowed, nil }() if err != nil { - log.Debugf("Returning OPA policy decision: %v (error: %v)", allowed, err) + log.Tracef("Returning OPA policy decision: %v (error: %v)", allowed, err) return allowed, err } - log.Debugf("Returning OPA policy decision: %v", allowed) + log.Tracef("Returning OPA policy decision: %v", allowed) return allowed, nil } diff --git a/opa/opa_test.go b/opa/opa_test.go new file mode 100644 index 0000000..961c915 --- /dev/null +++ b/opa/opa_test.go @@ -0,0 +1,76 @@ +package opa + +import ( + "net/http" + "path/filepath" + "runtime" + "testing" + + "github.com/stretchr/testify/assert" +) + +var ( + _, b, _, _ = runtime.Caller(0) + basepath = filepath.Dir(b) +) + +func TestCreateNetworkDenied(t *testing.T) { + + req, _ := http.NewRequest("GET", "/v1.39/networks/create?", nil) + + opaHandler := &DockerOpaHandler{basepath + "/../sample_policies/deny_network_create.rego", "build.rego"} + res, _ := opaHandler.ValidateRequest(req) + + assert.False(t, res, "Network creation should be rejected") + +} + +func TestDenyPost(t *testing.T) { + + postReq, _ := http.NewRequest("POST", "/test", nil) + + opaHandler := &DockerOpaHandler{basepath + "/../sample_policies/deny_post.rego", "build.rego"} + res, _ := opaHandler.ValidateRequest(postReq) + + assert.False(t, res, "POST request should be rejected") + + getReq, _ := http.NewRequest("GET", "/test", nil) + + res, _ = opaHandler.ValidateRequest(getReq) + + assert.True(t, res, "GET request should be allowed") + +} + +func TestDenyBasedOnHeader(t *testing.T) { + reqWithHeader, _ := http.NewRequest("POST", "/test", nil) + + reqWithHeader.Header.Set("X-foo", "bar") + + opaHandler := &DockerOpaHandler{basepath + "/../sample_policies/deny_header.rego", "build.rego"} + res, _ := opaHandler.ValidateRequest(reqWithHeader) + + assert.True(t, res, "request with X-foo header should be allowed") + + reqWithoutHeader, _ := http.NewRequest("POST", "/test", nil) + + res, _ = opaHandler.ValidateRequest(reqWithoutHeader) + + assert.False(t, res, "request without X-foo header should be rejected") + +} + +func TestBuildDockerfileFromFoo(t *testing.T) { + + req, _ := http.NewRequest("GET", "/test", nil) + + opaHandler := &DockerOpaHandler{"", basepath + "/../sample_policies/deny_build_foo.rego"} + res, _ := opaHandler.ValidateDockerFile(req, "FROM foo") + + assert.False(t, res, "FROM foo should be rejected") + + res, _ = opaHandler.ValidateDockerFile(req, "FROM bar") + + assert.False(t, res, "FROM bar should be allowed") + +} diff --git a/pkg/opa/opa_test.go b/pkg/opa/opa_test.go deleted file mode 100644 index 82f3b14..0000000 --- a/pkg/opa/opa_test.go +++ /dev/null @@ -1,77 +0,0 @@ -package opa - -import ( - "github.com/stretchr/testify/assert" - "net/http" - "path/filepath" - "runtime" - "testing" -) - -var ( - _, b, _, _ = runtime.Caller(0) - basepath = filepath.Dir(b) -) - -func TestCreateNetworkDenied(t *testing.T) { - - req, _ := http.NewRequest("GET", "/v1.39/networks/create?", nil) - - opaHandler := &DockerOpaHandler{ basepath+"/../../sample_policies/deny_network_create.rego", "build.rego"} - res, _ := opaHandler.ValidateRequest(req); - - assert.False(t, res, "Network creation should be rejected"); - -} - -func TestDenyPost(t *testing.T) { - - postReq, _ := http.NewRequest("POST", "/test", nil) - - opaHandler := &DockerOpaHandler{ basepath+"/../../sample_policies/deny_post.rego", "build.rego"} - res, _ := opaHandler.ValidateRequest(postReq); - - assert.False(t, res, "POST request should be rejected"); - - getReq, _ := http.NewRequest("GET", "/test", nil) - - res, _ = opaHandler.ValidateRequest(getReq); - - assert.True(t, res, "GET request should be allowed"); - -} - -func TestDenyBasedOnHeader(t *testing.T) { - reqWithHeader, _ := http.NewRequest("POST", "/test", nil) - - reqWithHeader.Header.Set("X-foo", "bar") - - opaHandler := &DockerOpaHandler{ basepath+"/../../sample_policies/deny_header.rego", "build.rego"} - res, _ := opaHandler.ValidateRequest(reqWithHeader); - - assert.True(t, res, "request with X-foo header should be allowed"); - - reqWithoutHeader, _ := http.NewRequest("POST", "/test", nil) - - res, _ = opaHandler.ValidateRequest(reqWithoutHeader); - - assert.False(t, res, "request without X-foo header should be rejected"); - -} - -func TestBuildDockerfileFromFoo(t *testing.T) { - - req, _ := http.NewRequest("GET", "/test", nil) - - opaHandler := &DockerOpaHandler{ "", basepath+"/../../sample_policies/deny_build_foo.rego"} - res, _ := opaHandler.ValidateDockerFile(req, "FROM foo"); - - assert.False(t, res, "FROM foo should be rejected"); - - res, _ = opaHandler.ValidateDockerFile(req, "FROM bar"); - - assert.False(t, res, "FROM bar should be allowed"); - -} - - From 9e6ff597402f88e86686d78256a8fcfd6292532c Mon Sep 17 00:00:00 2001 From: Peter Viertel Date: Mon, 8 Feb 2021 12:18:53 +1100 Subject: [PATCH 2/3] better version string in makefile --- Makefile | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-) diff --git a/Makefile b/Makefile index c2310d8..206aee9 100644 --- a/Makefile +++ b/Makefile @@ -1,9 +1,23 @@ .DEFAULT_GOAL := ci BIN ?= docker-socket-firewall PKG := github.com/linead/docker-socket-firewall -GIT_DIRTY := $(shell test -n "$(git status -z .)" || echo -dirty) -GIT_INFO := $(shell git describe --tags --always)$(GIT_DIRTY) -LDFLAGS = "-X main.gitInfo=${GIT_INFO}" + +TAG_COMMIT := $(shell git rev-list --abbrev-commit --tags --max-count=1) +TAG := $(shell git describe --abbrev=0 --tags ${TAG_COMMIT} 2>/dev/null || true) +COMMIT := $(shell git rev-parse --short HEAD) +DATE := $(shell git log -1 --format=%cd --date=format:"%Y%m%d") +VERSION := $(TAG:v%=%) +ifneq ($(COMMIT), $(TAG_COMMIT)) + VERSION := $(VERSION)-next-$(COMMIT)-$(DATE) +endif +ifeq ($(VERSION,), "" ) + VERSION := $(COMMIT)-$(DATA) +endif +ifneq ($(shell git status --porcelain),) + VERSION := $(VERSION)-dirty +endif + +LDFLAGS := -ldflags "-X main.version=$(VERSION)" local : ARCH ?= $(shell go env GOOS)-$(shell go env GOARCH) ARCH ?= linux-amd64 @@ -18,19 +32,19 @@ VERSION ?= master local: build-dirs GOOS=$(GOOS) \ GOARCH=$(GOARCH) \ - go build -ldflags $(LDFLAGS) + go build $(LDFLAGS) mv $(BIN) _output/bin/$(GOOS)/$(GOARCH)/ mac: GOOS=darwin \ GOARCH=amd64 \ - go build -ldflags $(LDFLAGS) + go build $(LDFLAGS) mv $(BIN) _output/bin/darwin/amd64/ linux: GOOS=linux \ GOARCH=amd64 \ - go build -ldflags $(LDFLAGS) + go build $(LDFLAGS) mv $(BIN) _output/bin/linux/amd64/ tests: From 60d67b0522ddf0c55225ad418aaf47c5bdf85e08 Mon Sep 17 00:00:00 2001 From: Peter Viertel Date: Mon, 8 Feb 2021 12:27:18 +1100 Subject: [PATCH 3/3] fix version variable name in Makefile --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 206aee9..a40e54d 100644 --- a/Makefile +++ b/Makefile @@ -17,7 +17,7 @@ ifneq ($(shell git status --porcelain),) VERSION := $(VERSION)-dirty endif -LDFLAGS := -ldflags "-X main.version=$(VERSION)" +LDFLAGS := -ldflags "-X main.gitInfo=$(VERSION)" local : ARCH ?= $(shell go env GOOS)-$(shell go env GOARCH) ARCH ?= linux-amd64