Song, So configure the postinstall script with "systemctl start gmond"?
On Tue, Mar 5, 2019 at 8:15 AM Song BJ Yang <yang...@cn.ibm.com> wrote: > the postscripts and postbootscripts are invoked on the [start] of a > system service named "xcatpostinit1.service", since systemd start the > services in parallel with consideration on dependency. There might be some > kind of deadlock while trying to restart a service in another service. > Someone has reported the similar situation > https://unix.stackexchange.com/questions/359941/starting-systemd-service-inside-systemd-service-causes-deadlock > . > What did you see on `journalctl -u xcatpostinit1` when it is hang? > > Back to your scenario @Brian, > >The ganglia packages get installed in otherpkgs, and the ganglia > postscript edits the /etc/ganglia/gmond.conf file with our custom cluster > info and attempts to enable and start the service. > > For diskless node, it is not a good practice to install and configure > packages with `otherpkgs` and `ospkgs` , the package should be installed > in rootimg directory with `otherpkgdir` and `otherpkglist` attributes, and > configured with `postinstall` scripts on genimage. > > ------------------------------------------------------------------------------ > YANG Song (杨嵩) > IBM China System Technology Laboratory > Tel: 86-10-82452903 > Email: yang...@cn.ibm.com > Address: Building 28, ZhongGuanCun Software Park, > No.8, Dong Bei Wang West Road, Haidian District Beijing 100193, PRC > > 北京市海淀区东北旺西路8号中关村软件园28号楼 > 邮编: 100193 > > > > ----- Original message ----- > From: Michael Robbert <mrobb...@mines.edu> > To: "xcat-user@lists.sourceforge.net" <xcat-user@lists.sourceforge.net> > Cc: > Subject: Re: [xcat-user] Diskless postboot script unable to start gmond > service > Date: Tue, Mar 5, 2019 8:28 AM > > > I'll note that I have seen similar problems with physical hosts and > running a diskfull install. If I put a "systemctl start $servicename" in > any of my postscripts they will hang during the postinstall process. I have > taken to removing the start step and just enabling the service, then once > I've determined that the postinstall is complete I just reboot the node and > all services start as expected. I have seen it with gmond and slurmd so I > know that it isn't specific to Ganglia. > > The other work around that I'm working on implementing is to move all the > things that postscripts are doing to Ansible. > > Mike > On 3/4/19 4:42 PM, Brian Joiner wrote: > > We're deploying diskless nodes in Vsphere and installing Ganglia > monitoring tools. > > The ganglia packages get installed in otherpkgs, and the ganglia > postscript edits the /etc/ganglia/gmond.conf file with our custom cluster > info and attempts to enable and start the service. > > systemctl enable gmond works > systemctl start gmond causes the script to hang, indefinitely, until I log > into the node and kill it. Then the script completes and allows other > postbootscripts to run. > > *Why is systemctl hanging on service start?* If we remove that command > from the script, it completes but the service doesn't auto start, so manual > intervention is required. Is this unique to a diskless install? We got > around it by creating the gmond.service file and symlink in the rootimg dir > of the diskless image, but were wondering if there's a way to get a service > to start the normal way. > > HOST: Vsphere, diskless, > Centos 7.5 > Ganglia 3.7 > xCAT 2.14 > -- > Thanks, > Brian Joiner > > _______________________________________________ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xcat-user > > _______________________________________________ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xcat-user > > > > _______________________________________________ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xcat-user > -- Brian Joiner
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