feature add process load

exec/process/process.go

@@ -44,6 +44,7 @@ func NewProcessCommandModelSpec() spec.ExpModelCommandSpec {
 			ExpActions: []spec.ExpActionCommandSpec{
 				NewKillProcessActionCommandSpec(),
 				NewStopProcessActionCommandSpec(),
+				NewProcessLoadActionCommandSpec(),
 			},
 		},
 	}

exec/process/process_load.go

@@ -0,0 +1,199 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * 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.
+ */
+
+package process
+
+import (
+	"context"
+	"fmt"
+	"github.com/chaosblade-io/chaosblade-exec-os/exec"
+	"github.com/chaosblade-io/chaosblade-exec-os/exec/category"
+	"github.com/chaosblade-io/chaosblade-spec-go/channel"
+	"github.com/chaosblade-io/chaosblade-spec-go/log"
+	"github.com/chaosblade-io/chaosblade-spec-go/spec"
+	osExec "os/exec"
+	"os/user"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const ProcessLoadBin = "chaos_processload"
+
+type ProcessLoadActionCommandSpec struct {
+	spec.BaseExpActionCommandSpec
+}
+
+func NewProcessLoadActionCommandSpec() spec.ExpActionCommandSpec {
+	return &ProcessLoadActionCommandSpec{
+		spec.BaseExpActionCommandSpec{
+			ActionMatchers: []spec.ExpFlagSpec{
+				&spec.ExpFlag{
+					Name: "count",
+					Desc: "process count, must be a positive integer, 0 or not set means unlimited",
+				},
+				&spec.ExpFlag{
+					Name: "user",
+					Desc: "execute process cmd as the specified user",
+				},
+			},
+			ActionFlags:    []spec.ExpFlagSpec{},
+			ActionExecutor: &ProcessLoadExecutor{},
+			ActionExample: `
+# create 10 process as user test
+blade c process load --count 10 --user test`,
+			ActionPrograms:    []string{ProcessLoadBin},
+			ActionCategories:  []string{category.SystemProcess},
+			ActionProcessHang: true,
+		},
+	}
+}
+
+func (*ProcessLoadActionCommandSpec) Name() string {
+	return "load"
+}
+
+func (*ProcessLoadActionCommandSpec) Aliases() []string {
+	return []string{"l"}
+}
+
+func (*ProcessLoadActionCommandSpec) ShortDesc() string {
+	return "create process load"
+}
+
+func (l *ProcessLoadActionCommandSpec) LongDesc() string {
+	if l.ActionLongDesc != "" {
+		return l.ActionLongDesc
+	}
+	return "create process load by ping"
+}
+
+func (*ProcessLoadActionCommandSpec) Categories() []string {
+	return []string{category.SystemProcess}
+}
+
+type ProcessLoadExecutor struct {
+	channel spec.Channel
+}
+
+func (pl *ProcessLoadExecutor) Name() string {
+	return "load"
+}
+
+var localChannel = channel.NewLocalChannel()
+
+func (pl *ProcessLoadExecutor) Exec(uid string, ctx context.Context, model *spec.ExpModel) *spec.Response {
+	countStr := model.ActionFlags["count"]
+	userName := model.ActionFlags["user"]
+
+	commands := []string{"ping", "ulimit"}
+	if response, ok := pl.channel.IsAllCommandsAvailable(ctx, commands); !ok {
+		return response
+	}
+
+	if userName != "" {
+		_, err := user.Lookup(userName)
+		if err != nil {
+			log.Errorf(ctx, "could not find user: %v %v\n", userName, err)
+			return spec.ResponseFailWithFlags(spec.ParameterIllegal, "user", userName, "is invalid")
+		}
+	}
+
+	if _, ok := spec.IsDestroy(ctx); ok {
+		return pl.stop(ctx, userName)
+	}
+
+	response := localChannel.Run(ctx, "ulimit", "-u")
+	if !response.Success {
+		log.Errorf(ctx, "process load, run ulimit err: %s", response.Err)
+		return spec.ResponseFailWithFlags(spec.ActionNotSupport, "command ulimit is not support")
+	}
+
+	reStr := strings.TrimSpace(response.Result.(string))
+	if reStr == "unlimited" {
+		log.Errorf(ctx, "proc is unlimited!")
+		return spec.ResponseFailWithFlags(spec.ActionNotSupport, "proc is unlimited!")
+	}
+
+	_, err := strconv.Atoi(reStr)
+	if err != nil {
+		return spec.ResponseFailWithFlags(spec.ActionNotSupport, err, "proc is invalid!")
+	}
+
+	if countStr == "" {
+		countStr = "0"
+	}
+	count, err := strconv.Atoi(countStr)
+	if err != nil {
+		log.Errorf(ctx, "count is not a number")
+		return spec.ResponseFailWithFlags(spec.ParameterIllegal, "count", count, "is not a number")
+	}
+	if count < 0 {
+		log.Errorf(ctx, "count < 0, count is not a illegal parameter")
+		return spec.ResponseFailWithFlags(spec.ParameterIllegal, "count", count, "must be a positive integer")
+	}
+
+	return pl.start(ctx, count, userName)
+}
+
+func (pl *ProcessLoadExecutor) SetChannel(channel spec.Channel) {
+	pl.channel = channel
+}
+
+func (pl *ProcessLoadExecutor) start(ctx context.Context, count int, userName string) *spec.Response {
+	if count == 0 {
+		if userName != "" {
+			go loopProc(ctx, fmt.Sprintf("su -c 'ping 127.0.0.1 > /dev/null' %s", userName))
+		} else {
+			go loopProc(ctx, fmt.Sprintf("ping 127.0.0.1 > /dev/null"))
+		}
+		select {}
+	} else {
+		for i := 0; i < count; i++ {
+			if userName != "" {
+				simpleProc(ctx, fmt.Sprintf("su -c 'ping 127.0.0.1 > /dev/null' %s", userName))
+			} else {
+				simpleProc(ctx, fmt.Sprintf("ping 127.0.0.1 > /dev/null"))
+			}
+		}
+	}
+	return spec.ReturnSuccess(ctx.Value(spec.Uid))
+}
+
+func (pl *ProcessLoadExecutor) stop(ctx context.Context, userName string) *spec.Response {
+	if userName != "" {
+		simpleProc(ctx, fmt.Sprintf("su -c \"ps aux | grep 'ping 127' | grep -v grep | awk '{print $2}' | xargs kill -9\" %s", userName))
+	}
+	simpleProc(ctx, "ps aux | grep 'ping 127' | grep -v grep | awk '{print $2}' | xargs kill -9")
+	ctx = context.WithValue(ctx, "bin", ProcessLoadBin)
+	return exec.Destroy(ctx, pl.channel, "process load")
+}
+
+func simpleProc(ctx context.Context, cmd string) {
+	if err := osExec.Command("/bin/bash", "-c", cmd).Start(); err != nil {
+		log.Errorf(ctx, "exec command: %s failed: %s", cmd, err)
+	}
+}
+
+func loopProc(ctx context.Context, cmd string) {
+	for {
+		if err := osExec.Command("/bin/bash", "-c", cmd).Start(); err != nil {
+			log.Errorf(ctx, "exec command: %s failed: %s", cmd, err)
+			break
+		}
+		time.Sleep(100 * time.Millisecond)
+	}
+}