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Ensure that only child processes for checks are reniced 

fixes #4989
This commit is contained in:
Gunnar Beutner 2017-02-21 11:31:07 +01:00
parent a75d7d69ec
commit 06c2a4088d
3 changed files with 22 additions and 4 deletions
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20
lib/base/process.cpp
View File

@ -63,7 +63,7 @@ static boost::once_flag l_ProcessOnceFlag = BOOST_ONCE_INIT;
static boost::once_flag l_SpawnHelperOnceFlag = BOOST_ONCE_INIT;
Process::Process(const Process::Arguments& arguments, const Dictionary::Ptr& extraEnvironment)
: m_Arguments(arguments), m_ExtraEnvironment(extraEnvironment), m_Timeout(600)
: m_Arguments(arguments), m_ExtraEnvironment(extraEnvironment), m_Timeout(600), m_AdjustPriority(false)
#ifdef _WIN32
, m_ReadPending(false), m_ReadFailed(false), m_Overlapped()
#endif /* _WIN32 */
@ -94,6 +94,7 @@ static Value ProcessSpawnImpl(struct msghdr *msgh, const Dictionary::Ptr& reques
Array::Ptr arguments = request->Get("arguments");
Dictionary::Ptr extraEnvironment = request->Get("extraEnvironment");
bool adjustPriority = request->Get("adjustPriority");
// build argv
char **argv = new char *[arguments->GetLength() + 1];
@ -161,7 +162,7 @@ static Value ProcessSpawnImpl(struct msghdr *msgh, const Dictionary::Ptr& reques
(void)close(fds[2]);
#ifdef HAVE_NICE
if (nice(5) < 0)
if (adjustPriority && nice(5) < 0)
Log(LogWarning, "base", "Failed to renice child process.");
#endif /* HAVE_NICE */
@ -366,12 +367,13 @@ static void StartSpawnProcessHelper(void)
l_ProcessControlPID = pid;
}
static pid_t ProcessSpawn(const std::vector<String>& arguments, const Dictionary::Ptr& extraEnvironment, int fds[3])
static pid_t ProcessSpawn(const std::vector<String>& arguments, const Dictionary::Ptr& extraEnvironment, bool adjustPriority, int fds[3])
{
Dictionary::Ptr request = new Dictionary();
request->Set("command", "spawn");
request->Set("arguments", Array::FromVector(arguments));
request->Set("extraEnvironment", extraEnvironment);
request->Set("adjustPriority", adjustPriority);
String jrequest = JsonEncode(request);
size_t length = jrequest.GetLength();
@ -579,6 +581,16 @@ double Process::GetTimeout(void) const
return m_Timeout;
}
void Process::SetAdjustPriority(bool adjust)
{
m_AdjustPriority = adjust;
}
bool Process::GetAdjustPriority(void) const
{
return m_AdjustPriority;
}
void Process::IOThreadProc(int tid)
{
#ifdef _WIN32
@ -959,7 +971,7 @@ void Process::Run(const boost::function<void(const ProcessResult&)>& callback)
fds[1] = outfds[1];
fds[2] = outfds[1];
m_Process = ProcessSpawn(m_Arguments, m_ExtraEnvironment, fds);
m_Process = ProcessSpawn(m_Arguments, m_ExtraEnvironment, m_AdjustPriority, fds);
m_PID = m_Process;
Log(LogNotice, "Process")

4
lib/base/process.hpp
View File

@ -73,6 +73,9 @@ public:
void SetTimeout(double timeout);
double GetTimeout(void) const;
void SetAdjustPriority(bool adjust);
bool GetAdjustPriority(void) const;
void Run(const boost::function<void (const ProcessResult&)>& callback = boost::function<void (const ProcessResult&)>());
pid_t GetPID(void) const;
@ -92,6 +95,7 @@ private:
Dictionary::Ptr m_ExtraEnvironment;
double m_Timeout;
bool m_AdjustPriority;
ProcessHandle m_Process;
pid_t m_PID;

2
lib/icinga/pluginutility.cpp
View File

@ -93,6 +93,8 @@ void PluginUtility::ExecuteCommand(const Command::Ptr& commandObj, const Checkab
else
process->SetTimeout(checkable->GetCheckTimeout());
process->SetAdjustPriority(true);
process->Run(boost::bind(callback, command, _1));
}