main.go

Documentation: github.com/chaos-mesh/chaos-mesh/e2e-test/cmd/e2e_helper

     1  // Copyright 2021 Chaos Mesh Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  
    16  package main
    17  
    18  import (
    19  	"bytes"
    20  	"context"
    21  	"encoding/json"
    22  	"flag"
    23  	"fmt"
    24  	"io"
    25  	"net"
    26  	"net/http"
    27  	"os"
    28  	"path/filepath"
    29  	"time"
    30  
    31  	"github.com/containerd/cgroups"
    32  )
    33  
    34  func main() {
    35  	port := flag.Int("port", 8080, "listen port")
    36  	dataDir := flag.String("data-dir", "/var/run/data", "data dir is the dir to write temp file, only used in io test")
    37  
    38  	flag.Parse()
    39  
    40  	s := newServer(*dataDir)
    41  
    42  	ctx, cancel := context.WithCancel(context.Background())
    43  	defer cancel()
    44  	go s.childProcessTimeServer.Start(ctx)
    45  	err := s.setupUDPServer()
    46  	if err != nil {
    47  		fmt.Println("failed to serve udp server", err)
    48  		os.Exit(1)
    49  	}
    50  
    51  	addr := fmt.Sprintf("0.0.0.0:%d", *port)
    52  	if err := http.ListenAndServe(addr, s.mux); err != nil {
    53  		fmt.Println("failed to serve http server", err)
    54  		os.Exit(1)
    55  	}
    56  }
    57  
    58  type server struct {
    59  	mux                    *http.ServeMux
    60  	dataDir                string
    61  	childProcessTimeServer childProcessTimeServer
    62  
    63  	// ONLY FOR TEST: a buf without lock
    64  	recvBuf []byte
    65  }
    66  
    67  func newServer(dataDir string) *server {
    68  	s := &server{
    69  		mux:                    http.NewServeMux(),
    70  		dataDir:                dataDir,
    71  		recvBuf:                make([]byte, 5),
    72  		childProcessTimeServer: &defaultChildProcessTimeServer{},
    73  	}
    74  	s.mux.HandleFunc("/ping", pong)
    75  	s.mux.HandleFunc("/time", s.time)
    76  	s.mux.HandleFunc("/child-process-time", s.childProcessTime)
    77  	s.mux.HandleFunc("/io", s.ioTest)
    78  	s.mux.HandleFunc("/mistake", s.mistakeTest)
    79  	s.mux.HandleFunc("/network/send", s.networkSendTest)
    80  	s.mux.HandleFunc("/network/recv", s.networkRecvTest)
    81  	s.mux.HandleFunc("/network/ping", s.networkPingTest)
    82  	s.mux.HandleFunc("/dns", s.dnsTest)
    83  	s.mux.HandleFunc("/stress", s.stressCondition)
    84  	s.mux.HandleFunc("/http", s.httpEcho)
    85  	s.mux.HandleFunc("/setup_https", s.SetupHTTPSServer)
    86  	return s
    87  }
    88  
    89  func pong(w http.ResponseWriter, _ *http.Request) {
    90  	w.Write([]byte("pong"))
    91  }
    92  
    93  func (s *server) setupUDPServer() error {
    94  	pc, err := net.ListenPacket("udp", "0.0.0.0:1070")
    95  	if err != nil {
    96  		return err
    97  	}
    98  
    99  	go func() {
   100  		for {
   101  			_, _, err := pc.ReadFrom(s.recvBuf)
   102  			fmt.Println("receive buf " + string(s.recvBuf))
   103  			if err != nil {
   104  				return
   105  			}
   106  		}
   107  	}()
   108  
   109  	return nil
   110  }
   111  
   112  // time write the current time as response body
   113  func (s *server) time(w http.ResponseWriter, _ *http.Request) {
   114  	w.Write([]byte(time.Now().Format(time.RFC3339Nano)))
   115  }
   116  
   117  // childProcessTime write the child process current time as response body
   118  func (s *server) childProcessTime(w http.ResponseWriter, _ *http.Request) {
   119  	now, err := s.childProcessTimeServer.Time()
   120  	if err != nil {
   121  		panic(err)
   122  	}
   123  	w.Write([]byte(now.Format(time.RFC3339Nano)))
   124  }
   125  
   126  // a handler to test io chaos
   127  func (s *server) mistakeTest(w http.ResponseWriter, _ *http.Request) {
   128  	path := filepath.Join(s.dataDir, "e2e-test")
   129  	origData := []byte("hello world!!!!!!!!!!!!")
   130  
   131  	err := os.WriteFile(path, origData, 0644)
   132  	if err != nil {
   133  		w.Write([]byte(fmt.Sprintf("failed to write file %v", err)))
   134  		return
   135  	}
   136  	gotData, err := os.ReadFile(path)
   137  	if err != nil {
   138  		w.Write([]byte(err.Error()))
   139  		return
   140  	}
   141  	result := bytes.Equal(origData, gotData)
   142  	if result {
   143  		w.Write([]byte("false"))
   144  		return
   145  	}
   146  	for i := 0; i < 10; i++ {
   147  		tmp, err := os.ReadFile(path)
   148  		if err != nil {
   149  			w.Write([]byte(err.Error()))
   150  		}
   151  		if !bytes.Equal(tmp, gotData) {
   152  			w.Write([]byte("true"))
   153  			return
   154  		}
   155  	}
   156  	w.Write([]byte("err"))
   157  }
   158  
   159  // a handler to test io chaos
   160  func (s *server) ioTest(w http.ResponseWriter, _ *http.Request) {
   161  	t1 := time.Now()
   162  	f, err := os.CreateTemp(s.dataDir, "e2e-test")
   163  	if err != nil {
   164  		w.Write([]byte(fmt.Sprintf("failed to create temp file %v", err)))
   165  		return
   166  	}
   167  	if _, err := f.Write([]byte("hello world")); err != nil {
   168  		w.Write([]byte(fmt.Sprintf("failed to write file %v", err)))
   169  		return
   170  	}
   171  	t2 := time.Now()
   172  	w.Write([]byte(t2.Sub(t1).String()))
   173  }
   174  
   175  // a handler to test dns chaos
   176  func (s *server) dnsTest(w http.ResponseWriter, r *http.Request) {
   177  
   178  	url, ok := r.URL.Query()["url"]
   179  
   180  	if !ok || len(url[0]) < 1 {
   181  		http.Error(w, "failed", http.StatusBadRequest)
   182  		return
   183  	}
   184  
   185  	ips, err := net.LookupIP(url[0])
   186  	if err != nil {
   187  		http.Error(w, "failed", http.StatusBadRequest)
   188  		return
   189  	}
   190  
   191  	if len(ips) == 0 {
   192  		http.Error(w, "failed", http.StatusBadRequest)
   193  		return
   194  	}
   195  
   196  	w.Write([]byte(ips[0].String()))
   197  }
   198  
   199  type networkSendTestBody struct {
   200  	TargetIP string `json:"targetIP"`
   201  }
   202  
   203  // a handler to test network chaos
   204  func (s *server) networkPingTest(w http.ResponseWriter, r *http.Request) {
   205  	var body networkSendTestBody
   206  
   207  	err := json.NewDecoder(r.Body).Decode(&body)
   208  	if err != nil {
   209  		http.Error(w, err.Error(), http.StatusBadRequest)
   210  		return
   211  	}
   212  
   213  	c := http.Client{
   214  		Timeout: 2 * time.Second,
   215  	}
   216  	startTime := time.Now()
   217  	resp, err := c.Get(fmt.Sprintf("http://%s:8080/ping", body.TargetIP))
   218  	if err != nil {
   219  		http.Error(w, err.Error(), http.StatusBadRequest)
   220  		return
   221  	}
   222  	defer resp.Body.Close()
   223  
   224  	endTime := time.Now()
   225  	out, err := io.ReadAll(resp.Body)
   226  	if err != nil {
   227  		http.Error(w, err.Error(), http.StatusBadRequest)
   228  		return
   229  	}
   230  
   231  	if string(out) != "pong" {
   232  		http.Error(w, "response is not pong", http.StatusBadRequest)
   233  		return
   234  	}
   235  
   236  	w.Write([]byte(fmt.Sprintf("OK %d", endTime.UnixNano()-startTime.UnixNano())))
   237  }
   238  
   239  // a handler to test network chaos
   240  func (s *server) networkSendTest(w http.ResponseWriter, r *http.Request) {
   241  	var body networkSendTestBody
   242  
   243  	err := json.NewDecoder(r.Body).Decode(&body)
   244  	if err != nil {
   245  		http.Error(w, err.Error(), http.StatusBadRequest)
   246  		return
   247  	}
   248  
   249  	conn, err := net.DialUDP("udp", nil, &net.UDPAddr{
   250  		IP:   net.ParseIP(body.TargetIP),
   251  		Port: 1070,
   252  	})
   253  	if err != nil {
   254  		http.Error(w, err.Error(), http.StatusBadRequest)
   255  		return
   256  	}
   257  	defer conn.Close()
   258  
   259  	n, err := io.WriteString(conn, "ping\n")
   260  	if err != nil {
   261  		http.Error(w, err.Error(), http.StatusBadRequest)
   262  		return
   263  	}
   264  	if n != 5 {
   265  		http.Error(w, "udp send less than 5 bytes", http.StatusBadRequest)
   266  		return
   267  	}
   268  	w.Write([]byte("send successfully\n"))
   269  }
   270  
   271  // a handler to test network chaos
   272  func (s *server) networkRecvTest(w http.ResponseWriter, r *http.Request) {
   273  	w.Write(s.recvBuf)
   274  
   275  	s.recvBuf = []byte{}
   276  }
   277  
   278  func (s *server) stressCondition(w http.ResponseWriter, r *http.Request) {
   279  	control, err := cgroups.Load(cgroups.V1, cgroups.PidPath(1))
   280  	if err != nil {
   281  		http.Error(w, err.Error(), http.StatusInternalServerError)
   282  		return
   283  	}
   284  
   285  	stats, err := control.Stat(cgroups.IgnoreNotExist)
   286  	if err != nil {
   287  		http.Error(w, err.Error(), http.StatusInternalServerError)
   288  		return
   289  	}
   290  
   291  	response, err := json.Marshal(map[string]uint64{
   292  		"cpuTime":     stats.CPU.Usage.Total,
   293  		"memoryUsage": stats.Memory.Usage.Usage - stats.Memory.Kernel.Usage - stats.Memory.Cache,
   294  	})
   295  	if err != nil {
   296  		http.Error(w, "fail to marshal response", http.StatusInternalServerError)
   297  		return
   298  	}
   299  
   300  	w.Write(response)
   301  }
   302  
   303  func (s *server) httpEcho(w http.ResponseWriter, r *http.Request) {
   304  	secrets := r.Header["Secret"]
   305  	if len(secrets) == 0 {
   306  		http.Error(w, "Forbidden", http.StatusForbidden)
   307  		return
   308  	}
   309  
   310  	for _, secret := range secrets {
   311  		w.Header().Add("Secret", secret)
   312  	}
   313  	defer r.Body.Close()
   314  	_, err := io.Copy(w, r.Body)
   315  	if err != nil {
   316  		http.Error(w, "fail to copy body between request and response", http.StatusInternalServerError)
   317  		return
   318  	}
   319  }
   320  
   321  type TLSServerKeys struct {
   322  	Cert []byte `json:"cert"`
   323  	Key  []byte `json:"key"`
   324  }
   325  
   326  func (s *server) SetupHTTPSServer(w http.ResponseWriter, r *http.Request) {
   327  	var body TLSServerKeys
   328  	err := json.NewDecoder(r.Body).Decode(&body)
   329  	if err != nil {
   330  		http.Error(w, err.Error(), http.StatusBadRequest)
   331  		return
   332  	}
   333  	err = os.WriteFile("/tmp/server.crt", body.Cert, 0644)
   334  	if err != nil {
   335  		http.Error(w, err.Error(), http.StatusInternalServerError)
   336  		return
   337  	}
   338  	err = os.WriteFile("/tmp/server.key", body.Key, 0644)
   339  	if err != nil {
   340  		http.Error(w, err.Error(), http.StatusInternalServerError)
   341  		return
   342  	}
   343  	srv := &server{
   344  		mux: http.NewServeMux(),
   345  	}
   346  	srv.mux.HandleFunc("/ping", pong)
   347  
   348  	go func() {
   349  		panic(http.ListenAndServeTLS("0.0.0.0:8081", "/tmp/server.crt", "/tmp/server.key", srv.mux))
   350  	}()
   351  	if err != nil {
   352  		return
   353  	}
   354  }
   355