From 2c7ca6f413b8270a2ea3bb598322ee986d6877cd Mon Sep 17 00:00:00 2001 From: linxin Date: Mon, 10 Apr 2023 18:30:40 +0800 Subject: [PATCH] =?UTF-8?q?=E6=8F=90=E4=BA=A4coredump=E8=BD=AC=E5=82=A8?= =?UTF-8?q?=E5=8A=9F=E8=83=BD=E4=BB=A3=E7=A0=81?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .vscode/sftp.json | 12 ++ config/config.go | 38 +++++++ coredump.go | 64 +++++++++++ corepipe/corepipe.go | 180 ++++++++++++++++++++++++++++++ go.mod | 51 +++++++++ go.sum | 253 +++++++++++++++++++++++++++++++++++++++++++ logger/logger.go | 25 +++++ main.go | 27 +++++ 8 files changed, 650 insertions(+) create mode 100644 .vscode/sftp.json create mode 100644 config/config.go create mode 100644 coredump.go create mode 100644 corepipe/corepipe.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 logger/logger.go create mode 100644 main.go diff --git a/.vscode/sftp.json b/.vscode/sftp.json new file mode 100644 index 0000000..a020e4e --- /dev/null +++ b/.vscode/sftp.json @@ -0,0 +1,12 @@ +{ + "name": "My Server", + "host": "192.168.169.12", + "protocol": "sftp", + "port": 22, + "username": "root", + "password": "root", + "remotePath": "/root/pipe", + "uploadOnSave": false, + "useTempFile": false, + "openSsh": false +} diff --git a/config/config.go b/config/config.go new file mode 100644 index 0000000..b8fcc3c --- /dev/null +++ b/config/config.go @@ -0,0 +1,38 @@ +package config + +import ( + "encoding/json" + "io/ioutil" +) + +type Coreconfig struct { + Core_pattern string + Core_limited string + Core__pipe_limit string + Socket_path string +} +type Pipeconfig struct { + Save_model int //0为文件保存 1为压缩保存 2为minidump保存 + File_base_path string + Total_file_mem_limit string + Containered_sock_path string +} + +func Init() (Coreconfig, error) { + var config Coreconfig + content, err := ioutil.ReadFile("./config.json") + if err != nil { + return config, err + } + err = json.Unmarshal(content, &config) + return config, err +} +func PipeInit() (Pipeconfig, error) { + var config Pipeconfig + content, err := ioutil.ReadFile("./pipe-config.json") + if err != nil { + return config, err + } + err = json.Unmarshal(content, &config) + return config, err +} diff --git a/coredump.go b/coredump.go new file mode 100644 index 0000000..5d671fa --- /dev/null +++ b/coredump.go @@ -0,0 +1,64 @@ +package main + +import ( + "coredump-handler/config" + "coredump-handler/logger" + "net" + "os/exec" + "syscall" +) + +func coredumpInit(coreconfig config.Coreconfig) error { + cmd := exec.Command("sysctl", "-w", "kernel.core_pattern='"+coreconfig.Core_pattern+"'") + err := cmd.Run() + if err != nil { + return err + } + cmd = exec.Command("sysctl", "-w", "kernel.core_pipe_limit="+coreconfig.Core__pipe_limit) + err = cmd.Run() + if err != nil { + return err + } + cmd = exec.Command("sysctl", "-w", "kernel.suid_dumpable=2") + err = cmd.Run() + if err != nil { + return err + } + cmd = exec.Command("ulimit", "-c", coreconfig.Core_limited) + err = cmd.Run() + if err != nil { + return err + } + return nil +} + +func coredumpHandler(coreconfig config.Coreconfig) error { + syscall.Unlink(coreconfig.Socket_path) + laddr, err := net.ResolveUnixAddr("unix", coreconfig.Socket_path) + if err != nil { + return err + } + listener, err := net.ListenUnix("unix", laddr) + if err != nil { + return err + } + defer listener.Close() + for { + c, err := listener.Accept() + if err != nil { + logger.Logger.Println(err) + } + go HandleServerConn(c) + } + return nil +} +func HandleServerConn(c net.Conn) { + defer c.Close() + buf := make([]byte, 1024) + nr, err := c.Read(buf) + if err != nil { + logger.Logger.Println(err) + return + } + logger.Logger.Println(buf[0:nr]) +} diff --git a/corepipe/corepipe.go b/corepipe/corepipe.go new file mode 100644 index 0000000..9b12732 --- /dev/null +++ b/corepipe/corepipe.go @@ -0,0 +1,180 @@ +package main + +import ( + "context" + "coredump-handler/config" + "coredump-handler/logger" + "errors" + "fmt" + "io" + "io/ioutil" + "os" + "regexp" + "strconv" + "syscall" + + "github.com/containerd/containerd" + "github.com/containerd/containerd/namespaces" +) + +func judgeMemory(pipe_config config.Pipeconfig) (bool, error) { + percent, err := strconv.ParseFloat(pipe_config.Total_file_mem_limit[:len(pipe_config.Total_file_mem_limit)-1], 64) + if err != nil { + return false, err + } + percent = percent / 100.0 + var stat syscall.Statfs_t + wd, err := syscall.Getwd() + if err != nil { + fmt.Println(err) + return false, err + } + syscall.Statfs(wd, &stat) + // 剩余空间的大小为块的数量 * 每个块的大小 + // stat.Bfree表示可用的块的数量，stat.Bsize表示每个块的大小 + usedSpacePer := float64(int64(stat.Blocks)-int64(stat.Bfree)) / int64(stat.Blocks) + if usedSpacePer >= percent { + return false, nil + } + return true, nil +} +func createCoreDumpDir(pipe_config *config.Pipeconfig, args []string) error { + pipe_config.File_base_path = fmt.Sprintf("%s/%s_%s_%s", pipe_config.File_base_path, args[1], args[2], args[3]) + dirName := pipe_config.File_base_path + if _, err := os.Stat(dirName); os.IsNotExist(err) { + // 目录不存在，创建目录 + if err := os.MkdirAll(dirName, os.ModePerm); err != nil { + return err + } + } else { + return errors.New("directory already exists") + } + return nil +} +func Chdir(dir string) error { + if err := os.Chdir(dir); err != nil { + return err + } + return nil +} +func getContainerId(pid string) (string, error) { + cgroup_path := fmt.Sprintf("/proc/%s/cgroup", pid) + content, err := ioutil.ReadFile(cgroup_path) + if err != nil { + return "", err + } + re := regexp.MustCompile(`([a-f\d]{64})`) + match := re.FindStringSubmatch(string(content)) + if len(match) < 2 { + return "", errors.New("failed to extract container ID from cgroup file") + } + containerID := match[1] + return containerID, nil +} +func getImageId(container_id string, sock_path string) (string, error) { + // 连接 containerd daemon + client, err := containerd.New(sock_path) + if err != nil { + logger.Logger.Println(err) + return "", err + } + defer client.Close() + // 根据容器 ID 获取容器信息 + ctx := namespaces.WithNamespace(context.Background(), "k8s.io") + container, err := client.LoadContainer(ctx, container_id) + if err != nil { + logger.Logger.Println(err) + return "", err + } + // 获取容器关联的镜像信息 + imageRef, err := container.Image(ctx) + if err != nil { + logger.Logger.Println(err) + return "", err + } + return imageRef.Name(), nil +} +func writeCoreConfig(data string) error { + err := ioutil.WriteFile("coredump.config", []byte(data), 0666) + if err != nil { + return err + } + fmt.Printf("Wrote %d bytes to file\n", len(data)) + return nil +} +func writeCoreDump() error { + file, err := os.Create("coredump.info") + if err != nil { + return err + } + defer file.Close() + + // 从标准输入流中读取数据，并将其写入文件中 + buf := make([]byte, 1024) + for { + n, err := io.ReadAtLeast(os.Stdin, buf, 1) + if err != nil && err != io.EOF { + return err + } + if n == 0 { + break + } + if _, err := file.Write(buf[:n]); err != nil { + return err + } + } + return nil +} +func main() { + err := Chdir("/root/pipe/corepipe") + if err != nil { + fmt.Println(err) + return + } + pipe_config, err := config.PipeInit() + if err != nil { + fmt.Println(err) + return + } + flag, err := judgeMemory(pipe_config) + if err != nil && !flag { + fmt.Println(err) + return + } + if len(os.Args) < 4 { + fmt.Println("parameter passing exception") + return + } + err = createCoreDumpDir(&pipe_config, os.Args) + if err != nil { + fmt.Println(err) + return + } + err = Chdir(pipe_config.File_base_path) + if err != nil { + fmt.Println(err) + return + } + err = logger.Init() + if err != nil { + fmt.Println(err) + return + } + logger.Logger.Println("logger init ok!") + container_id, err := getContainerId(os.Args[1]) + var image_id string + if err == nil && len(container_id) != 0 { + image_id, err = getImageId(container_id, pipe_config.Containered_sock_path) + if err != nil { + logger.Logger.Println(err) + } + } + err = writeCoreConfig(image_id) + if err != nil { + logger.Logger.Println(err) + } + err = writeCoreDump() + if err != nil { + logger.Logger.Println(err) + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..8b20e15 --- /dev/null +++ b/go.mod @@ -0,0 +1,51 @@ +module coredump-handler + +go 1.20 + +require github.com/containerd/containerd v1.7.0 + +require ( + github.com/AdaLogics/go-fuzz-headers v0.0.0-20230106234847-43070de90fa1 // indirect + github.com/AdamKorcz/go-118-fuzz-build v0.0.0-20221215162035-5330a85ea652 // indirect + github.com/Microsoft/go-winio v0.6.0 // indirect + github.com/Microsoft/hcsshim v0.10.0-rc.7 // indirect + github.com/containerd/cgroups v1.1.0 // indirect + github.com/containerd/continuity v0.3.0 // indirect + github.com/containerd/fifo v1.1.0 // indirect + github.com/containerd/ttrpc v1.2.1 // indirect + github.com/containerd/typeurl/v2 v2.1.0 // indirect + github.com/cyphar/filepath-securejoin v0.2.3 // indirect + github.com/docker/go-events v0.0.0-20190806004212-e31b211e4f1c // indirect + github.com/go-logr/logr v1.2.3 // indirect + github.com/go-logr/stdr v1.2.2 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/google/go-cmp v0.5.9 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/klauspost/compress v1.16.0 // indirect + github.com/moby/locker v1.0.1 // indirect + github.com/moby/sys/mountinfo v0.6.2 // indirect + github.com/moby/sys/sequential v0.5.0 // indirect + github.com/moby/sys/signal v0.7.0 // indirect + github.com/opencontainers/go-digest v1.0.0 // indirect + github.com/opencontainers/image-spec v1.1.0-rc2.0.20221005185240-3a7f492d3f1b // indirect + github.com/opencontainers/runc v1.1.4 // indirect + github.com/opencontainers/runtime-spec v1.1.0-rc.1 // indirect + github.com/opencontainers/selinux v1.11.0 // indirect + github.com/pelletier/go-toml v1.9.5 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/sirupsen/logrus v1.9.0 // indirect + go.opencensus.io v0.24.0 // indirect + go.opentelemetry.io/otel v1.14.0 // indirect + go.opentelemetry.io/otel/trace v1.14.0 // indirect + golang.org/x/mod v0.7.0 // indirect + golang.org/x/net v0.7.0 // indirect + golang.org/x/sync v0.1.0 // indirect + golang.org/x/sys v0.6.0 // indirect + golang.org/x/text v0.7.0 // indirect + golang.org/x/tools v0.5.0 // indirect + google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect + google.golang.org/grpc v1.53.0 // indirect + google.golang.org/protobuf v1.28.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..3a9ea06 --- /dev/null +++ b/go.sum @@ -0,0 +1,253 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/AdaLogics/go-fuzz-headers v0.0.0-20230106234847-43070de90fa1 h1:EKPd1INOIyr5hWOWhvpmQpY6tKjeG0hT1s3AMC/9fic= +github.com/AdaLogics/go-fuzz-headers v0.0.0-20230106234847-43070de90fa1/go.mod h1:VzwV+t+dZ9j/H867F1M2ziD+yLHtB46oM35FxxMJ4d0= +github.com/AdamKorcz/go-118-fuzz-build v0.0.0-20221215162035-5330a85ea652 h1:+vTEFqeoeur6XSq06bs+roX3YiT49gUniJK7Zky7Xjg= +github.com/AdamKorcz/go-118-fuzz-build v0.0.0-20221215162035-5330a85ea652/go.mod h1:OahwfttHWG6eJ0clwcfBAHoDI6X/LV/15hx/wlMZSrU= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2yDvg= +github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE= +github.com/Microsoft/hcsshim v0.10.0-rc.7 h1:HBytQPxcv8Oy4244zbQbe6hnOnx544eL5QPUqhJldz8= +github.com/Microsoft/hcsshim v0.10.0-rc.7/go.mod h1:ILuwjA+kNW+MrN/w5un7n3mTqkwsFu4Bp05/okFUZlE= +github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= 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logger + +import ( + "log" + "os" +) + +var Logger *log.Logger + +func Init() error { + //创建输出日志文件 + logFile, err := os.Create("./main.log") + if err != nil { + return err + } + //创建一个Logger + //参数1：日志写入目的地 + //参数2：每条日志的前缀 + //参数3：日志属性 + Logger = log.New(logFile, "coredump-handler_", log.Ldate|log.Ltime|log.Lshortfile) + + //SetFlags设置输出选项 + Logger.SetFlags(log.Ldate | log.Ltime | log.Lshortfile) + return nil +} diff --git a/main.go b/main.go new file mode 100644 index 0000000..6f31c53 --- /dev/null +++ b/main.go @@ -0,0 +1,27 @@ +package main + +import ( + "coredump-handler/config" + "coredump-handler/logger" +) + +func main() { + err := logger.Init() + if err != nil { + return + } + logger.Logger.Println("logger init ok") + coreconfig, err := config.Init() + logger.Logger.Println("config init ok") + if err != nil { + logger.Logger.Println(err) + return + } + err = coredumpInit(coreconfig) + if err != nil { + logger.Logger.Println(err) + return + } + logger.Logger.Println("coredump init ok") + coredumpHandler(coreconfig) +}