[Beowulf] ganglia on CentOS 8?

[Fred Youhanaie]

One thing that come to my mind is selinux. Is it enabled and enforcing?

getenforce # check status
setenforce 0 # to set to permissive, if enforcing

Cheers,
Fred

On 02/04/2020 19:23, David Mathog wrote:
> 
> 
> On Wed, 1 Apr 2020, Jonathan Engwall wrote:
> 
>> About getex:GNU nano 4.6               /usr/local/etc/gmond.conf
> 
> Values are the same other then gexec.  Swapping that doesn't resolve the issue that no hosts are reported.
> 
>> Though not exactly what you are doing, bringing up the services:
>> #!/bin/bash
>>
>> service gmond stop
>> service gmetad stop
>> nginx
>> nginx -s reopen
>> nginx -s reload
>> service gmetad start
>> service gmond start
>> service ipfw3 stop
>> service ipfw3 start
> 
> It is all started as far as systemctl is concerned:
> 
> systemctl status gmond.service
> ● gmond.service - Ganglia Meta Daemon
>     Loaded: loaded (/usr/lib/systemd/system/gmond.service; enabled; vendor preset: disabled)
>     Active: active (running) since Thu 2020-04-02 11:16:14 PDT; 2min 18s ago
>    Process: 3770 ExecStart=/usr/sbin/gmond (code=exited, status=0/SUCCESS)
>   Main PID: 3771 (gmond)
>      Tasks: 2 (limit: 26213)
>     Memory: 2.0M
>     CGroup: /system.slice/gmond.service
>             └─3771 /usr/sbin/gmond
> 
> Apr 02 11:16:14 poweredge.cluster systemd[1]: Starting Ganglia Meta Daemon...
> Apr 02 11:16:14 poweredge.cluster systemd[1]: Started Ganglia Meta Daemon.
> [root at poweredge ganglia]# systemctl status gmetad.service
> ● gmetad.service - Ganglia Meta Daemon
>     Loaded: loaded (/usr/lib/systemd/system/gmetad.service; enabled; vendor preset: disabled)
>     Active: active (running) since Thu 2020-04-02 11:12:33 PDT; 6min ago
>   Main PID: 3659 (gmetad)
>      Tasks: 9 (limit: 26213)
>     Memory: 3.0M
>     CGroup: /system.slice/gmetad.service
>             └─3659 /usr/sbin/gmetad -d 1
> 
> Apr 02 11:12:33 poweredge.cluster systemd[1]: Started Ganglia Meta Daemon.
> Apr 02 11:12:33 poweredge.cluster gmetad[3659]: Sources are ...
> Apr 02 11:12:33 poweredge.cluster gmetad[3659]: Source: [my cluster, step 15] has 1 sources
> Apr 02 11:12:33 poweredge.cluster gmetad[3659]:         127.0.0.1
> Apr 02 11:12:33 poweredge.cluster gmetad[3659]: Data thread 139734408959744 is monitoring [my cluster] data sou>
> Apr 02 11:12:33 poweredge.cluster gmetad[3659]:         127.0.0.1
> 
> I did just notice though that /var/lib/ganglia/rrds is NOT populated on the CentOS 8 system, whereas it is on my Ubuntu laptop.  Also there is something peculiar going on with the network, because 
> even though iptables is not running anywhere the gmond/gmetad ports on the CO8 system are not visible from the Ubuntu system, but in the reverse direction they are.
> 
> A thread on this problem has been started here:
> 
> https://forums.centos.org/viewtopic.php?f=54&t=73893
> 
> Regards,
> 
> David Mathog
> mathog at caltech.edu
> 
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