提交coredump转储功能代码

2023-04-10 18:30:40 +08:00
parent 14254aeb95
commit 2c7ca6f413
8 changed files with 650 additions and 0 deletions
--- a/.vscode/sftp.json
+++ 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
+}
--- a/config/config.go
+++ 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
+}
--- a/coredump.go
+++ 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])
+}
--- a/corepipe/corepipe.go
+++ 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)
+	}
+}
--- a/go.mod
+++ 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
+)
--- a/go.sum
+++ 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=
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--- a/logger/logger.go
+++ b/logger/logger.go
@@ -0,0 +1,25 @@
+package 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
+}
--- a/main.go
+++ 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)
+}