Discussion:
start service in multi-user.target but don't stop it on isolate
(too old to reply)
Alexander 'Leo' Bergolth
2018-03-19 13:39:41 UTC
Permalink
Raw Message
Hi!

I am using the software watchdog daemon together with a watchdog device in "nowayout" mode.
Thus once started, the watchdog daemon should never be stopped or the box will be rebooted.

watchdog.service is WantedBy multi-user.target and when changing e.g. to rescue.target, it should stay active.

I tried to configure this using IgnoreOnIsolate=true but this doesn't show the desired effect.
On "systemd isolate rescue.target", watchdog.service still gets stopped:
-------------------- 8< --------------------
Mar 19 13:44:02 strike watchdog[1291]: stopping daemon (5.13)
Mar 19 13:44:02 strike systemd[1]: Stopping watchdog daemon...
-------------------- 8< --------------------

What did I do wrong?

Cheers,
--leo


I am using systemd-219-42.el7_4.7.x86_64 on Centos 7.

-------------------- 8< --------------------
# systemctl cat watchdog.service
# /usr/lib/systemd/system/watchdog.service
[Unit]
Description=watchdog daemon
# man systemd.special
# auto added After=basic.target

[Service]
Type=forking
ExecStart=/usr/sbin/watchdog
ControlGroup=cpu:/

[Install]
WantedBy=multi-user.target

# /etc/systemd/system/watchdog.service.d/override.conf
[Unit]
IgnoreOnIsolate=true

-------------------- 8< --------------------
# systemctl status watchdog.service
* watchdog.service - watchdog daemon
Loaded: loaded (/usr/lib/systemd/system/watchdog.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/watchdog.service.d
`-override.conf
Active: inactive (dead) since Mon 2018-03-19 13:44:07 CET; 23min ago
Process: 1267 ExecStart=/usr/sbin/watchdog (code=exited, status=0/SUCCESS)
Main PID: 1291 (code=exited, status=0/SUCCESS)

-------------------- 8< --------------------
# systemctl show watchdog.service
Type=forking
Restart=no
NotifyAccess=none
RestartUSec=100ms
TimeoutStartUSec=1min 30s
TimeoutStopUSec=1min 30s
WatchdogUSec=0
WatchdogTimestampMonotonic=0
StartLimitInterval=10000000
StartLimitBurst=5
StartLimitAction=none
FailureAction=none
PermissionsStartOnly=no
RootDirectoryStartOnly=no
RemainAfterExit=no
GuessMainPID=yes
MainPID=0
ControlPID=0
FileDescriptorStoreMax=0
StatusErrno=0
Result=success
ExecMainStartTimestamp=Mon 2018-03-19 13:42:22 CET
ExecMainStartTimestampMonotonic=15052342
ExecMainExitTimestamp=Mon 2018-03-19 13:44:07 CET
ExecMainExitTimestampMonotonic=119544736
ExecMainPID=1291
ExecMainCode=1
ExecMainStatus=0
ExecStart={ path=/usr/sbin/watchdog ; argv[]=/usr/sbin/watchdog ; ignore_errors=no ; start_time=[Mon 2018-03-19 13:42:22 CET] ; stop_time=[Mon 2018-03-19 13:42:22 CET] ; pid=12
Slice=system.slice
MemoryCurrent=18446744073709551615
TasksCurrent=18446744073709551615
Delegate=no
CPUAccounting=no
CPUShares=18446744073709551615
StartupCPUShares=18446744073709551615
CPUQuotaPerSecUSec=infinity
BlockIOAccounting=no
BlockIOWeight=18446744073709551615
StartupBlockIOWeight=18446744073709551615
MemoryAccounting=no
MemoryLimit=18446744073709551615
DevicePolicy=auto
TasksAccounting=no
TasksMax=18446744073709551615
UMask=0022
LimitCPU=18446744073709551615
LimitFSIZE=18446744073709551615
LimitDATA=18446744073709551615
LimitSTACK=18446744073709551615
LimitCORE=18446744073709551615
LimitRSS=18446744073709551615
LimitNOFILE=4096
LimitAS=18446744073709551615
LimitNPROC=63090
LimitMEMLOCK=65536
LimitLOCKS=18446744073709551615
LimitSIGPENDING=63090
LimitMSGQUEUE=819200
LimitNICE=0
LimitRTPRIO=0
Type=forking
Restart=no
NotifyAccess=none
RestartUSec=100ms
TimeoutStartUSec=1min 30s
TimeoutStopUSec=1min 30s
WatchdogUSec=0
WatchdogTimestampMonotonic=0
StartLimitInterval=10000000
StartLimitBurst=5
StartLimitAction=none
FailureAction=none
PermissionsStartOnly=no
RootDirectoryStartOnly=no
RemainAfterExit=no
GuessMainPID=yes
MainPID=0
ControlPID=0
FileDescriptorStoreMax=0
StatusErrno=0
Result=success
ExecMainStartTimestamp=Mon 2018-03-19 13:42:22 CET
ExecMainStartTimestampMonotonic=15052342
ExecMainExitTimestamp=Mon 2018-03-19 13:44:07 CET
ExecMainExitTimestampMonotonic=119544736
ExecMainPID=1291
ExecMainCode=1
ExecMainStatus=0
ExecStart={ path=/usr/sbin/watchdog ; argv[]=/usr/sbin/watchdog ; ignore_errors=no ; start_time=[Mon 2018-03-19 13:42:22 CET] ; stop_time=[Mon 2018-03-19 13:42:22 CET] ; pid=12
Slice=system.slice
MemoryCurrent=18446744073709551615
TasksCurrent=18446744073709551615
Delegate=no
CPUAccounting=no
CPUShares=18446744073709551615
StartupCPUShares=18446744073709551615
CPUQuotaPerSecUSec=infinity
BlockIOAccounting=no
BlockIOWeight=18446744073709551615
StartupBlockIOWeight=18446744073709551615
MemoryAccounting=no
MemoryLimit=18446744073709551615
DevicePolicy=auto
TasksAccounting=no
TasksMax=18446744073709551615
UMask=0022
LimitCPU=18446744073709551615
LimitFSIZE=18446744073709551615
LimitDATA=18446744073709551615
LimitSTACK=18446744073709551615
LimitCORE=18446744073709551615
LimitRSS=18446744073709551615
LimitNOFILE=4096
LimitAS=18446744073709551615
LimitNPROC=63090
LimitMEMLOCK=65536
LimitLOCKS=18446744073709551615
LimitSIGPENDING=63090
LimitMSGQUEUE=819200
LimitNICE=0
LimitRTPRIO=0
LimitRTTIME=18446744073709551615
OOMScoreAdjust=0
Nice=0
IOScheduling=0
CPUSchedulingPolicy=0
CPUSchedulingPriority=0
TimerSlackNSec=50000
CPUSchedulingResetOnFork=no
NonBlocking=no
StandardInput=null
StandardOutput=journal
StandardError=inherit
TTYReset=no
TTYVHangup=no
TTYVTDisallocate=no
SyslogPriority=30
SyslogLevelPrefix=yes
SecureBits=0
CapabilityBoundingSet=18446744073709551615
AmbientCapabilities=0
MountFlags=0
PrivateTmp=no
PrivateNetwork=no
PrivateDevices=no
ProtectHome=no
ProtectSystem=no
SameProcessGroup=no
IgnoreSIGPIPE=yes
NoNewPrivileges=no
SystemCallErrorNumber=0
RuntimeDirectoryMode=0755
KillMode=control-group
KillSignal=15
SendSIGKILL=yes
SendSIGHUP=no
Id=watchdog.service
Names=watchdog.service
Requires=basic.target
Wants=system.slice
WantedBy=multi-user.target
Conflicts=shutdown.target
Before=multi-user.target shutdown.target
After=basic.target systemd-journald.socket system.slice
Description=watchdog daemon
LoadState=loaded
ActiveState=inactive
SubState=dead
FragmentPath=/usr/lib/systemd/system/watchdog.service
DropInPaths=/etc/systemd/system/watchdog.service.d/override.conf
UnitFileState=enabled
UnitFilePreset=disabled
InactiveExitTimestamp=Mon 2018-03-19 13:42:22 CET
InactiveExitTimestampMonotonic=14539954
ActiveEnterTimestamp=Mon 2018-03-19 13:42:22 CET
ActiveEnterTimestampMonotonic=15052358
ActiveExitTimestamp=Mon 2018-03-19 13:44:02 CET
ActiveExitTimestampMonotonic=114543976
InactiveEnterTimestamp=Mon 2018-03-19 13:44:07 CET
InactiveEnterTimestampMonotonic=119544801
CanStart=yes
CanStop=yes
CanReload=no
CanIsolate=no
StopWhenUnneeded=no
RefuseManualStart=no
RefuseManualStop=no
AllowIsolate=no
DefaultDependencies=yes
OnFailureJobMode=replace
IgnoreOnIsolate=yes
IgnoreOnSnapshot=no
NeedDaemonReload=no
JobTimeoutUSec=0
JobTimeoutAction=none
ConditionResult=yes
AssertResult=yes
ConditionTimestamp=Mon 2018-03-19 13:42:22 CET
ConditionTimestampMonotonic=14539719
AssertTimestamp=Mon 2018-03-19 13:42:22 CET
AssertTimestampMonotonic=14539719
Transient=no
[***@strike systemd]# systemctl show watchdog.service | cat
Type=forking
Restart=no
NotifyAccess=none
RestartUSec=100ms
TimeoutStartUSec=1min 30s
TimeoutStopUSec=1min 30s
WatchdogUSec=0
WatchdogTimestampMonotonic=0
StartLimitInterval=10000000
StartLimitBurst=5
StartLimitAction=none
FailureAction=none
PermissionsStartOnly=no
RootDirectoryStartOnly=no
RemainAfterExit=no
GuessMainPID=yes
MainPID=0
ControlPID=0
FileDescriptorStoreMax=0
StatusErrno=0
Result=success
ExecMainStartTimestamp=Mon 2018-03-19 13:42:22 CET
ExecMainStartTimestampMonotonic=15052342
ExecMainExitTimestamp=Mon 2018-03-19 13:44:07 CET
ExecMainExitTimestampMonotonic=119544736
ExecMainPID=1291
ExecMainCode=1
ExecMainStatus=0
ExecStart={ path=/usr/sbin/watchdog ; argv[]=/usr/sbin/watchdog ; ignore_errors=no ; start_time=[Mon 2018-03-19 13:42:22 CET] ; stop_time=[Mon 2018-03-19 13:42:22 CET] ; pid=1267 ; code=exited ; status=0 }
Slice=system.slice
MemoryCurrent=18446744073709551615
TasksCurrent=18446744073709551615
Delegate=no
CPUAccounting=no
CPUShares=18446744073709551615
StartupCPUShares=18446744073709551615
CPUQuotaPerSecUSec=infinity
BlockIOAccounting=no
BlockIOWeight=18446744073709551615
StartupBlockIOWeight=18446744073709551615
MemoryAccounting=no
MemoryLimit=18446744073709551615
DevicePolicy=auto
TasksAccounting=no
TasksMax=18446744073709551615
UMask=0022
LimitCPU=18446744073709551615
LimitFSIZE=18446744073709551615
LimitDATA=18446744073709551615
LimitSTACK=18446744073709551615
LimitCORE=18446744073709551615
LimitRSS=18446744073709551615
LimitNOFILE=4096
LimitAS=18446744073709551615
LimitNPROC=63090
LimitMEMLOCK=65536
LimitLOCKS=18446744073709551615
LimitSIGPENDING=63090
LimitMSGQUEUE=819200
LimitNICE=0
LimitRTPRIO=0
LimitRTTIME=18446744073709551615
OOMScoreAdjust=0
Nice=0
IOScheduling=0
CPUSchedulingPolicy=0
CPUSchedulingPriority=0
TimerSlackNSec=50000
CPUSchedulingResetOnFork=no
NonBlocking=no
StandardInput=null
StandardOutput=journal
StandardError=inherit
TTYReset=no
TTYVHangup=no
TTYVTDisallocate=no
SyslogPriority=30
SyslogLevelPrefix=yes
SecureBits=0
CapabilityBoundingSet=18446744073709551615
AmbientCapabilities=0
MountFlags=0
PrivateTmp=no
PrivateNetwork=no
PrivateDevices=no
ProtectHome=no
ProtectSystem=no
SameProcessGroup=no
IgnoreSIGPIPE=yes
NoNewPrivileges=no
SystemCallErrorNumber=0
RuntimeDirectoryMode=0755
KillMode=control-group
KillSignal=15
SendSIGKILL=yes
SendSIGHUP=no
Id=watchdog.service
Names=watchdog.service
Requires=basic.target
Wants=system.slice
WantedBy=multi-user.target
Conflicts=shutdown.target
Before=multi-user.target shutdown.target
After=basic.target systemd-journald.socket system.slice
Description=watchdog daemon
LoadState=loaded
ActiveState=inactive
SubState=dead
FragmentPath=/usr/lib/systemd/system/watchdog.service
DropInPaths=/etc/systemd/system/watchdog.service.d/override.conf
UnitFileState=enabled
UnitFilePreset=disabled
InactiveExitTimestamp=Mon 2018-03-19 13:42:22 CET
InactiveExitTimestampMonotonic=14539954
ActiveEnterTimestamp=Mon 2018-03-19 13:42:22 CET
ActiveEnterTimestampMonotonic=15052358
ActiveExitTimestamp=Mon 2018-03-19 13:44:02 CET
ActiveExitTimestampMonotonic=114543976
InactiveEnterTimestamp=Mon 2018-03-19 13:44:07 CET
InactiveEnterTimestampMonotonic=119544801
CanStart=yes
CanStop=yes
CanReload=no
CanIsolate=no
StopWhenUnneeded=no
RefuseManualStart=no
RefuseManualStop=no
AllowIsolate=no
DefaultDependencies=yes
OnFailureJobMode=replace
IgnoreOnIsolate=yes
IgnoreOnSnapshot=no
NeedDaemonReload=no
JobTimeoutUSec=0
JobTimeoutAction=none
ConditionResult=yes
AssertResult=yes
ConditionTimestamp=Mon 2018-03-19 13:42:22 CET
ConditionTimestampMonotonic=14539719
AssertTimestamp=Mon 2018-03-19 13:42:22 CET
AssertTimestampMonotonic=14539719
Transient=no
--
e-mail ::: Leo.Bergolth (at) wu.ac.at
fax ::: +43-1-31336-906050
location ::: IT-Services | Vienna University of Economics | Austria
Jérémy Rosen
2018-03-20 09:34:19 UTC
Permalink
Raw Message
naive question, but why are you not using systemd's handling of hardware
daemon (see man:system.conf for how to activate it)

basically, systemd is monitored by the hardware daemon and systemd
monitors (via its software watchdog) any service that wants to be monitored

this creates a better chain of trust (I think) than an external daemon
and would do what you want...
Post by Alexander 'Leo' Bergolth
Hi!
I am using the software watchdog daemon together with a watchdog device in "nowayout" mode.
Thus once started, the watchdog daemon should never be stopped or the box will be rebooted.
watchdog.service is WantedBy multi-user.target and when changing e.g. to rescue.target, it should stay active.
I tried to configure this using IgnoreOnIsolate=true but this doesn't show the desired effect.
-------------------- 8< --------------------
Mar 19 13:44:02 strike watchdog[1291]: stopping daemon (5.13)
Mar 19 13:44:02 strike systemd[1]: Stopping watchdog daemon...
-------------------- 8< --------------------
What did I do wrong?
Cheers,
--leo
I am using systemd-219-42.el7_4.7.x86_64 on Centos 7.
-------------------- 8< --------------------
# systemctl cat watchdog.service
# /usr/lib/systemd/system/watchdog.service
[Unit]
Description=watchdog daemon
# man systemd.special
# auto added After=basic.target
[Service]
Type=forking
ExecStart=/usr/sbin/watchdog
ControlGroup=cpu:/
[Install]
WantedBy=multi-user.target
# /etc/systemd/system/watchdog.service.d/override.conf
[Unit]
IgnoreOnIsolate=true
-------------------- 8< --------------------
# systemctl status watchdog.service
* watchdog.service - watchdog daemon
Loaded: loaded (/usr/lib/systemd/system/watchdog.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/watchdog.service.d
`-override.conf
Active: inactive (dead) since Mon 2018-03-19 13:44:07 CET; 23min ago
Process: 1267 ExecStart=/usr/sbin/watchdog (code=exited, status=0/SUCCESS)
Main PID: 1291 (code=exited, status=0/SUCCESS)
-------------------- 8< --------------------
# systemctl show watchdog.service
Type=forking
Restart=no
NotifyAccess=none
RestartUSec=100ms
TimeoutStartUSec=1min 30s
TimeoutStopUSec=1min 30s
WatchdogUSec=0
WatchdogTimestampMonotonic=0
StartLimitInterval=10000000
StartLimitBurst=5
StartLimitAction=none
FailureAction=none
PermissionsStartOnly=no
RootDirectoryStartOnly=no
RemainAfterExit=no
GuessMainPID=yes
MainPID=0
ControlPID=0
FileDescriptorStoreMax=0
StatusErrno=0
Result=success
ExecMainStartTimestamp=Mon 2018-03-19 13:42:22 CET
ExecMainStartTimestampMonotonic=15052342
ExecMainExitTimestamp=Mon 2018-03-19 13:44:07 CET
ExecMainExitTimestampMonotonic=119544736
ExecMainPID=1291
ExecMainCode=1
ExecMainStatus=0
ExecStart={ path=/usr/sbin/watchdog ; argv[]=/usr/sbin/watchdog ; ignore_errors=no ; start_time=[Mon 2018-03-19 13:42:22 CET] ; stop_time=[Mon 2018-03-19 13:42:22 CET] ; pid=12
Slice=system.slice
MemoryCurrent=18446744073709551615
TasksCurrent=18446744073709551615
Delegate=no
CPUAccounting=no
CPUShares=18446744073709551615
StartupCPUShares=18446744073709551615
CPUQuotaPerSecUSec=infinity
BlockIOAccounting=no
BlockIOWeight=18446744073709551615
StartupBlockIOWeight=18446744073709551615
MemoryAccounting=no
MemoryLimit=18446744073709551615
DevicePolicy=auto
TasksAccounting=no
TasksMax=18446744073709551615
UMask=0022
LimitCPU=18446744073709551615
LimitFSIZE=18446744073709551615
LimitDATA=18446744073709551615
LimitSTACK=18446744073709551615
LimitCORE=18446744073709551615
LimitRSS=18446744073709551615
LimitNOFILE=4096
LimitAS=18446744073709551615
LimitNPROC=63090
LimitMEMLOCK=65536
LimitLOCKS=18446744073709551615
LimitSIGPENDING=63090
LimitMSGQUEUE=819200
LimitNICE=0
LimitRTPRIO=0
Type=forking
Restart=no
NotifyAccess=none
RestartUSec=100ms
TimeoutStartUSec=1min 30s
TimeoutStopUSec=1min 30s
WatchdogUSec=0
WatchdogTimestampMonotonic=0
StartLimitInterval=10000000
StartLimitBurst=5
StartLimitAction=none
FailureAction=none
PermissionsStartOnly=no
RootDirectoryStartOnly=no
RemainAfterExit=no
GuessMainPID=yes
MainPID=0
ControlPID=0
FileDescriptorStoreMax=0
StatusErrno=0
Result=success
ExecMainStartTimestamp=Mon 2018-03-19 13:42:22 CET
ExecMainStartTimestampMonotonic=15052342
ExecMainExitTimestamp=Mon 2018-03-19 13:44:07 CET
ExecMainExitTimestampMonotonic=119544736
ExecMainPID=1291
ExecMainCode=1
ExecMainStatus=0
ExecStart={ path=/usr/sbin/watchdog ; argv[]=/usr/sbin/watchdog ; ignore_errors=no ; start_time=[Mon 2018-03-19 13:42:22 CET] ; stop_time=[Mon 2018-03-19 13:42:22 CET] ; pid=12
Slice=system.slice
MemoryCurrent=18446744073709551615
TasksCurrent=18446744073709551615
Delegate=no
CPUAccounting=no
CPUShares=18446744073709551615
StartupCPUShares=18446744073709551615
CPUQuotaPerSecUSec=infinity
BlockIOAccounting=no
BlockIOWeight=18446744073709551615
StartupBlockIOWeight=18446744073709551615
MemoryAccounting=no
MemoryLimit=18446744073709551615
DevicePolicy=auto
TasksAccounting=no
TasksMax=18446744073709551615
UMask=0022
LimitCPU=18446744073709551615
LimitFSIZE=18446744073709551615
LimitDATA=18446744073709551615
LimitSTACK=18446744073709551615
LimitCORE=18446744073709551615
LimitRSS=18446744073709551615
LimitNOFILE=4096
LimitAS=18446744073709551615
LimitNPROC=63090
LimitMEMLOCK=65536
LimitLOCKS=18446744073709551615
LimitSIGPENDING=63090
LimitMSGQUEUE=819200
LimitNICE=0
LimitRTPRIO=0
LimitRTTIME=18446744073709551615
OOMScoreAdjust=0
Nice=0
IOScheduling=0
CPUSchedulingPolicy=0
CPUSchedulingPriority=0
TimerSlackNSec=50000
CPUSchedulingResetOnFork=no
NonBlocking=no
StandardInput=null
StandardOutput=journal
StandardError=inherit
TTYReset=no
TTYVHangup=no
TTYVTDisallocate=no
SyslogPriority=30
SyslogLevelPrefix=yes
SecureBits=0
CapabilityBoundingSet=18446744073709551615
AmbientCapabilities=0
MountFlags=0
PrivateTmp=no
PrivateNetwork=no
PrivateDevices=no
ProtectHome=no
ProtectSystem=no
SameProcessGroup=no
IgnoreSIGPIPE=yes
NoNewPrivileges=no
SystemCallErrorNumber=0
RuntimeDirectoryMode=0755
KillMode=control-group
KillSignal=15
SendSIGKILL=yes
SendSIGHUP=no
Id=watchdog.service
Names=watchdog.service
Requires=basic.target
Wants=system.slice
WantedBy=multi-user.target
Conflicts=shutdown.target
Before=multi-user.target shutdown.target
After=basic.target systemd-journald.socket system.slice
Description=watchdog daemon
LoadState=loaded
ActiveState=inactive
SubState=dead
FragmentPath=/usr/lib/systemd/system/watchdog.service
DropInPaths=/etc/systemd/system/watchdog.service.d/override.conf
UnitFileState=enabled
UnitFilePreset=disabled
InactiveExitTimestamp=Mon 2018-03-19 13:42:22 CET
InactiveExitTimestampMonotonic=14539954
ActiveEnterTimestamp=Mon 2018-03-19 13:42:22 CET
ActiveEnterTimestampMonotonic=15052358
ActiveExitTimestamp=Mon 2018-03-19 13:44:02 CET
ActiveExitTimestampMonotonic=114543976
InactiveEnterTimestamp=Mon 2018-03-19 13:44:07 CET
InactiveEnterTimestampMonotonic=119544801
CanStart=yes
CanStop=yes
CanReload=no
CanIsolate=no
StopWhenUnneeded=no
RefuseManualStart=no
RefuseManualStop=no
AllowIsolate=no
DefaultDependencies=yes
OnFailureJobMode=replace
IgnoreOnIsolate=yes
IgnoreOnSnapshot=no
NeedDaemonReload=no
JobTimeoutUSec=0
JobTimeoutAction=none
ConditionResult=yes
AssertResult=yes
ConditionTimestamp=Mon 2018-03-19 13:42:22 CET
ConditionTimestampMonotonic=14539719
AssertTimestamp=Mon 2018-03-19 13:42:22 CET
AssertTimestampMonotonic=14539719
Transient=no
Type=forking
Restart=no
NotifyAccess=none
RestartUSec=100ms
TimeoutStartUSec=1min 30s
TimeoutStopUSec=1min 30s
WatchdogUSec=0
WatchdogTimestampMonotonic=0
StartLimitInterval=10000000
StartLimitBurst=5
StartLimitAction=none
FailureAction=none
PermissionsStartOnly=no
RootDirectoryStartOnly=no
RemainAfterExit=no
GuessMainPID=yes
MainPID=0
ControlPID=0
FileDescriptorStoreMax=0
StatusErrno=0
Result=success
ExecMainStartTimestamp=Mon 2018-03-19 13:42:22 CET
ExecMainStartTimestampMonotonic=15052342
ExecMainExitTimestamp=Mon 2018-03-19 13:44:07 CET
ExecMainExitTimestampMonotonic=119544736
ExecMainPID=1291
ExecMainCode=1
ExecMainStatus=0
ExecStart={ path=/usr/sbin/watchdog ; argv[]=/usr/sbin/watchdog ; ignore_errors=no ; start_time=[Mon 2018-03-19 13:42:22 CET] ; stop_time=[Mon 2018-03-19 13:42:22 CET] ; pid=1267 ; code=exited ; status=0 }
Slice=system.slice
MemoryCurrent=18446744073709551615
TasksCurrent=18446744073709551615
Delegate=no
CPUAccounting=no
CPUShares=18446744073709551615
StartupCPUShares=18446744073709551615
CPUQuotaPerSecUSec=infinity
BlockIOAccounting=no
BlockIOWeight=18446744073709551615
StartupBlockIOWeight=18446744073709551615
MemoryAccounting=no
MemoryLimit=18446744073709551615
DevicePolicy=auto
TasksAccounting=no
TasksMax=18446744073709551615
UMask=0022
LimitCPU=18446744073709551615
LimitFSIZE=18446744073709551615
LimitDATA=18446744073709551615
LimitSTACK=18446744073709551615
LimitCORE=18446744073709551615
LimitRSS=18446744073709551615
LimitNOFILE=4096
LimitAS=18446744073709551615
LimitNPROC=63090
LimitMEMLOCK=65536
LimitLOCKS=18446744073709551615
LimitSIGPENDING=63090
LimitMSGQUEUE=819200
LimitNICE=0
LimitRTPRIO=0
LimitRTTIME=18446744073709551615
OOMScoreAdjust=0
Nice=0
IOScheduling=0
CPUSchedulingPolicy=0
CPUSchedulingPriority=0
TimerSlackNSec=50000
CPUSchedulingResetOnFork=no
NonBlocking=no
StandardInput=null
StandardOutput=journal
StandardError=inherit
TTYReset=no
TTYVHangup=no
TTYVTDisallocate=no
SyslogPriority=30
SyslogLevelPrefix=yes
SecureBits=0
CapabilityBoundingSet=18446744073709551615
AmbientCapabilities=0
MountFlags=0
PrivateTmp=no
PrivateNetwork=no
PrivateDevices=no
ProtectHome=no
ProtectSystem=no
SameProcessGroup=no
IgnoreSIGPIPE=yes
NoNewPrivileges=no
SystemCallErrorNumber=0
RuntimeDirectoryMode=0755
KillMode=control-group
KillSignal=15
SendSIGKILL=yes
SendSIGHUP=no
Id=watchdog.service
Names=watchdog.service
Requires=basic.target
Wants=system.slice
WantedBy=multi-user.target
Conflicts=shutdown.target
Before=multi-user.target shutdown.target
After=basic.target systemd-journald.socket system.slice
Description=watchdog daemon
LoadState=loaded
ActiveState=inactive
SubState=dead
FragmentPath=/usr/lib/systemd/system/watchdog.service
DropInPaths=/etc/systemd/system/watchdog.service.d/override.conf
UnitFileState=enabled
UnitFilePreset=disabled
InactiveExitTimestamp=Mon 2018-03-19 13:42:22 CET
InactiveExitTimestampMonotonic=14539954
ActiveEnterTimestamp=Mon 2018-03-19 13:42:22 CET
ActiveEnterTimestampMonotonic=15052358
ActiveExitTimestamp=Mon 2018-03-19 13:44:02 CET
ActiveExitTimestampMonotonic=114543976
InactiveEnterTimestamp=Mon 2018-03-19 13:44:07 CET
InactiveEnterTimestampMonotonic=119544801
CanStart=yes
CanStop=yes
CanReload=no
CanIsolate=no
StopWhenUnneeded=no
RefuseManualStart=no
RefuseManualStop=no
AllowIsolate=no
DefaultDependencies=yes
OnFailureJobMode=replace
IgnoreOnIsolate=yes
IgnoreOnSnapshot=no
NeedDaemonReload=no
JobTimeoutUSec=0
JobTimeoutAction=none
ConditionResult=yes
AssertResult=yes
ConditionTimestamp=Mon 2018-03-19 13:42:22 CET
ConditionTimestampMonotonic=14539719
AssertTimestamp=Mon 2018-03-19 13:42:22 CET
AssertTimestampMonotonic=14539719
Transient=no
--
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eco Pour la planÚte, n'imprimez ce mail que si c'est nécessaire
Alexander 'Leo' Bergolth
2018-03-26 08:30:40 UTC
Permalink
Raw Message
Post by Jérémy Rosen
naive question, but why are you not using systemd's handling of hardware
daemon (see man:system.conf for how to activate it)
The reason is laziness. ;-)

Since I am suffering from IO-subsystem related kernel bugs, I need to
detect IO lockups.
AFAIK systemd doesn't currently provide tests for basic system health
like max-load, accessibility of basic files etc.

Of course I could write my own system-health service that periodically
does these kind of tests and is monitored by systemds watchdog using
sd_notify(WATCHDOG=1").
But until I bring myself up to implement such a service, I'll stick to
using the software watchdog daemon. :-)

Cheers,
--leo
--
e-mail ::: Leo.Bergolth (at) wu.ac.at
fax ::: +43-1-31336-906050
location ::: IT-Services | Vienna University of Economics | Austria
Lennart Poettering
2018-03-20 09:53:41 UTC
Permalink
Raw Message
Post by Alexander 'Leo' Bergolth
Hi!
I am using the software watchdog daemon together with a watchdog device in "nowayout" mode.
Thus once started, the watchdog daemon should never be stopped or the box will be rebooted.
watchdog.service is WantedBy multi-user.target and when changing e.g. to rescue.target, it should stay active.
I tried to configure this using IgnoreOnIsolate=true but this doesn't show the desired effect.
-------------------- 8< --------------------
Mar 19 13:44:02 strike watchdog[1291]: stopping daemon (5.13)
Mar 19 13:44:02 strike systemd[1]: Stopping watchdog daemon...
-------------------- 8< --------------------
What did I do wrong?
Your service will by default depend on basic.target, and hence if that
goes away (and it will on isolate) then your service will too. Use
DefaultDependencies=no in [Unit] to clarify that your service should
not have such a default dependency on basic.target.

Lennart
--
Lennart Poettering, Red Hat
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