From 536536bc5dd617ae90e3e107d52e3f1b57afc3ce Mon Sep 17 00:00:00 2001 From: DuodenumL Date: Fri, 1 Jul 2022 19:00:35 +0800 Subject: [PATCH] support conflist --- app/cnicmd.go | 58 ++++++----------- cni/cniitool.go | 170 ++++++++++++++++++++++++++++++++++++++++++++++++ go.mod | 2 +- go.sum | 104 +++++++++++++++++++++++++++-- 4 files changed, 290 insertions(+), 44 deletions(-) create mode 100644 cni/cniitool.go diff --git a/app/cnicmd.go b/app/cnicmd.go index 1aed677..c4a82f4 100644 --- a/app/cnicmd.go +++ b/app/cnicmd.go @@ -5,7 +5,6 @@ import ( "fmt" "io/ioutil" "os" - "strings" "syscall" "github.com/opencontainers/runtime-spec/specs-go" @@ -43,42 +42,6 @@ func runCNI(handler handler.Handler) func(*cli.Context) error { return errors.WithStack(err) } - cniFilename, cniConfigFilename, err := cni.FindCNI(conf.CNIConfDir, conf.CNIBinDir) - if err != nil { - return - } - - env := []string{ - "CNI_IFNAME=" + conf.CNIIfname, - "CNI_PATH=" + conf.CNIBinDir, - "CNI_ARGS=" + os.Getenv("CNI_ARGS"), - "CNI_COMMAND=" + strings.ToUpper(c.String("command")), - "CNI_CONTAINERID=" + state.ID, - } - - if state.Pid != 0 { - env = append(env, "CNI_NETNS="+fmt.Sprintf("/proc/%d/ns/net", state.Pid)) - } - - cniConfig, err := os.ReadFile(cniConfigFilename) - if err != nil { - return errors.WithStack(err) - } - if cniConfig, err = handler.HandleCNIConfig(cniConfig); err != nil { - return errors.WithStack(err) - } - r, w, err := os.Pipe() - if err != nil { - return errors.WithStack(err) - } - if _, err = w.Write(cniConfig); err != nil { - return errors.WithStack(err) - } - defer w.Close() - if err := syscall.Dup2(int(r.Fd()), 0); err != nil { - return errors.WithStack(err) - } - file, err := os.OpenFile(conf.CNILog, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644) if err != nil { return errors.WithStack(err) @@ -90,7 +53,24 @@ func runCNI(handler handler.Handler) func(*cli.Context) error { return errors.WithStack(err) } - log.Infof("[hook] cni running: %+v %s", strings.Join(env, " "), cniFilename) - return errors.WithStack(syscall.Exec(cniFilename, []string{cniFilename}, env)) + netns := "" + if state.Pid != 0 { + netns = fmt.Sprintf("/proc/%d/ns/net", state.Pid) + } + + cniToolConfig := cni.CNIToolConfig{ + CNIPath: conf.CNIBinDir, + NetConfPath: conf.CNIConfDir, + NetNS: netns, + Args: os.Getenv("CNI_ARGS"), + IfName: conf.CNIIfname, + Cmd: c.String("command"), + ContainerID: state.ID, + Handler: handler.HandleCNIConfig, + } + + log.Infof("[hook] docker-cni running: %+v", cniToolConfig) + err = cni.Run(cniToolConfig) + return errors.WithStack(err) } } diff --git a/cni/cniitool.go b/cni/cniitool.go new file mode 100644 index 0000000..7be3f6f --- /dev/null +++ b/cni/cniitool.go @@ -0,0 +1,170 @@ +// see:https://github.com/containernetworking/cni/blob/main/cnitool/cnitool.go +package cni + +import ( + "context" + "fmt" + "io/ioutil" + "path/filepath" + "sort" + "strings" + + "github.com/containernetworking/cni/libcni" +) + +// Protocol parameters are passed to the plugins via OS environment variables. +const ( + CmdAdd = "add" + CmdCheck = "check" + CmdDel = "del" +) + +// CNIToolConfig . +type CNIToolConfig struct { + CNIPath string `json:"cni_path"` + NetConfPath string `json:"net_conf_path"` + NetNS string `json:"net_ns"` + Args string `json:"args"` + IfName string `json:"if_name"` + Cmd string `json:"cmd"` + ContainerID string `json:"container_id"` + Handler func([]byte) ([]byte, error) +} + +func parseArgs(args string) ([][2]string, error) { + var result [][2]string + + pairs := strings.Split(args, ";") + for _, pair := range pairs { + kv := strings.Split(pair, "=") + if len(kv) != 2 || kv[0] == "" || kv[1] == "" { + return nil, fmt.Errorf("invalid CNI_ARGS pair %q", pair) + } + + result = append(result, [2]string{kv[0], kv[1]}) + } + + return result, nil +} + +// ConfFromFile . +func ConfFromFile(filename string, handler func([]byte) ([]byte, error)) (*libcni.NetworkConfig, error) { + bytes, err := ioutil.ReadFile(filename) + if err != nil { + return nil, fmt.Errorf("error reading %s: %w", filename, err) + } + if handler != nil { + bytes, err = handler(bytes) + if err != nil { + return nil, fmt.Errorf("error handling %s: %w", filename, err) + } + } + return libcni.ConfFromBytes(bytes) +} + +// ConfListFromFile . +func ConfListFromFile(filename string, handler func([]byte) ([]byte, error)) (*libcni.NetworkConfigList, error) { + bytes, err := ioutil.ReadFile(filename) + if err != nil { + return nil, fmt.Errorf("error reading %s: %w", filename, err) + } + if handler != nil { + bytes, err = handler(bytes) + if err != nil { + return nil, fmt.Errorf("error handling %s: %w", filename, err) + } + } + return libcni.ConfListFromBytes(bytes) +} + +// LoadConf . +func LoadConf(dir string, handler func([]byte) ([]byte, error)) (*libcni.NetworkConfig, error) { + files, err := libcni.ConfFiles(dir, []string{".conf", ".json"}) + switch { + case err != nil: + return nil, err + case len(files) == 0: + return nil, libcni.NoConfigsFoundError{Dir: dir} + } + sort.Strings(files) + + for _, confFile := range files { + conf, err := ConfFromFile(confFile, handler) + if err != nil { + return nil, err + } + return conf, nil + } + return nil, libcni.NotFoundError{Dir: dir, Name: ""} +} + +// LoadConfList . +func LoadConfList(dir string, handler func([]byte) ([]byte, error)) (*libcni.NetworkConfigList, error) { + files, err := libcni.ConfFiles(dir, []string{".conflist"}) + if err != nil { + return nil, err + } + sort.Strings(files) + + for _, confFile := range files { + conf, err := ConfListFromFile(confFile, handler) + if err != nil { + return nil, err + } + return conf, nil + } + + // Try and load a network configuration file (instead of list) + // then upconvert. + singleConf, err := LoadConf(dir, handler) + if err != nil { + // A little extra logic so the error makes sense + if _, ok := err.(libcni.NoConfigsFoundError); len(files) != 0 && ok { + // Config lists found but no config files found + return nil, libcni.NotFoundError{Dir: dir, Name: ""} + } + + return nil, err + } + return libcni.ConfListFromConf(singleConf) +} + +// Run . +func Run(config CNIToolConfig) error { + netconf, err := LoadConfList(config.NetConfPath, config.Handler) + if err != nil { + return err + } + + var cniArgs [][2]string + if len(config.Args) > 0 { + cniArgs, err = parseArgs(config.Args) + if err != nil { + return err + } + } + + cninet := libcni.NewCNIConfig(filepath.SplitList(config.CNIPath), nil) + + rt := &libcni.RuntimeConf{ + ContainerID: config.ContainerID, + NetNS: config.NetNS, + IfName: config.IfName, + Args: cniArgs, + } + + switch config.Cmd { + case CmdAdd: + result, err := cninet.AddNetworkList(context.TODO(), netconf, rt) + if result != nil { + _ = result.Print() + } + return err + case CmdCheck: + return cninet.CheckNetworkList(context.TODO(), netconf, rt) + case CmdDel: + return cninet.DelNetworkList(context.TODO(), netconf, rt) + default: + return fmt.Errorf("unsupported command %v", config.Cmd) + } +} diff --git a/go.mod b/go.mod index 3ce2bf1..a027b8c 100644 --- a/go.mod +++ b/go.mod @@ -3,10 +3,10 @@ module github.com/projecteru2/docker-cni go 1.15 require ( + github.com/containernetworking/cni v1.1.1 github.com/opencontainers/runtime-spec v1.0.2 github.com/pkg/errors v0.9.1 github.com/sirupsen/logrus v1.8.1 github.com/urfave/cli/v2 v2.3.0 - golang.org/x/sys v0.0.0-20200217220822-9197077df867 // indirect gopkg.in/yaml.v2 v2.4.0 ) diff --git a/go.sum b/go.sum index 0330e2f..b872aac 100644 --- a/go.sum +++ b/go.sum @@ -1,8 +1,49 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= +github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI= +github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU= +github.com/containernetworking/cni v1.1.1 h1:ky20T7c0MvKvbMOwS/FrlbNwjEoqJEUUYfsL4b0mc4k= +github.com/containernetworking/cni v1.1.1/go.mod h1:sDpYKmGVENF3s6uvMvGgldDWeG8dMxakj/u+i9ht9vw= github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY= github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo= +github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4= +github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ= +github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE= +github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= +github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8= +github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA= +github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs= +github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w= +github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0= +github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI= +github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk= +github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw= +github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY= +github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= +github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU= +github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= +github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU= +github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= +github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE= +github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU= +github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc= +github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A= 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h1:HnhC7FXeEQY45zxNK3PPoIUhzk/80Xly9PcubAlGdZY= github.com/opencontainers/runtime-spec v1.0.2 h1:UfAcuLBJB9Coz72x1hgl8O5RVzTdNiaglX6v2DM6FI0= github.com/opencontainers/runtime-spec v1.0.2/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0= github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4= @@ -15,16 +56,71 @@ github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5I github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc= github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE= github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0= -github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w= +github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= +github.com/stretchr/testify v1.5.1 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