github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/configuration/config_manager/proc_util.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package configmanager
    21  
    22  import (
    23  	"context"
    24  	"fmt"
    25  
    26  	"github.com/shirou/gopsutil/v3/process"
    27  
    28  	appsv1alpha1 "github.com/1aal/kubeblocks/apis/apps/v1alpha1"
    29  	cfgcore "github.com/1aal/kubeblocks/pkg/configuration/core"
    30  )
    31  
    32  // findParentPIDByProcessName gets parent pid
    33  func findParentPIDByProcessName(processName string, ctx ...context.Context) (PID, error) {
    34  	var fctx context.Context
    35  
    36  	if len(ctx) == 0 {
    37  		fctx = context.TODO()
    38  	} else {
    39  		fctx = ctx[0]
    40  	}
    41  	allProcess, err := process.ProcessesWithContext(fctx)
    42  	if err != nil {
    43  		return InvalidPID, err
    44  	}
    45  
    46  	psGraph := map[PID]int32{}
    47  	for _, proc := range allProcess {
    48  		name, err := proc.Name()
    49  		// OS X getting the name of the system process may fail,
    50  		// because OS X Process.Name function depends on sysctl and elevated permissions
    51  		if err != nil {
    52  			logger.Error(err, fmt.Sprintf("failed to get process name from pid[%d], and pass", proc.Pid))
    53  			continue
    54  		}
    55  		if name != processName {
    56  			continue
    57  		}
    58  		ppid, err := proc.Ppid()
    59  		if err != nil {
    60  			return InvalidPID, cfgcore.WrapError(err, "failed to get parent pid from pid[%d]", proc.Pid)
    61  		}
    62  		psGraph[PID(proc.Pid)] = ppid
    63  	}
    64  
    65  	for key, value := range psGraph {
    66  		if _, ok := psGraph[PID(value)]; !ok {
    67  			return key, nil
    68  		}
    69  	}
    70  
    71  	return InvalidPID, cfgcore.MakeError("cannot find pid of process name: [%s]", processName)
    72  }
    73  
    74  func IsValidUnixSignal(sig appsv1alpha1.SignalType) bool {
    75  	_, ok := allUnixSignals[sig]
    76  	return ok
    77  }