[lustre-discuss] need to always manually add network after reboot

[Angelos Ching]

Hi Sid,

Notice that you are using lnetctl net add to add the lnet network, which 
means you should be using a recent version of Lustre that depends on 
/etc/lnet.conf for boot time lnet configuration.

You can save the current lnet configuration using command: lnetctl 
export --backup > /etc/lnet.conf (make a backup of the original file 
first if required)

On next boot, lnet.service will load your lnet configuration from the file.

Or you can manually build lnet.conf as lnetctl seems to have occasion 
problems with some of the fields exported by "lnetctl export --backup"

Attaching my simple lnet.conf for your reference:

> # cat /etc/lnet.conf
> ip2nets:
>   - net-spec: o2ib
>     ip-range:
>       0: 10.2.8.*
>   - net-spec: tcp
>     ip-range:
>       0: 10.5.9.*
> route:
>     - net: o2ib
>       gateway: 10.5.9.25 at tcp
>       hop: -1
>       priority: 0
>     - net: o2ib
>       gateway: 10.5.9.24 at tcp
>       hop: -1
>       priority: 0
> global:
>     numa_range: 0
>     max_intf: 200
>     discovery: 1
>     drop_asym_route: 0
Best regards,
Angelos

On 23/02/2021 13:58, Sid Young via lustre-discuss wrote:
>
> G'Day all,
> I'm finding that when I reboot any node in our new HPC, I need to keep 
> manually adding the network using lnetctl net add --net tcp --if ens2f0
> Then I can do an lnetctl net show and see the tcp part active...
>
> I have options in /etc/modprobe.d/lnet.conf
> options lnet networks=tcp
>
> and
>
> [root at hpc-oss-03 ~]# cat /etc/modprobe.d/lustre.conf
> options lnet networks="tcp(ens2f0)"
> options lnet ip2nets="tcp(ens2f0) 10.140.93.*
>
> I've read the doco and tried to understand the correct parameters for 
> a simple Lustre config so this is what I worked out is needed... but I 
> suspect its still wrong.
>
> Any help appreciated :)
>
>
>
> Sid Young
>
>
> _______________________________________________
> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org

-- 
Angelos Ching
ClusterTech Limited

Tel     : +852-2655-6138
Fax     : +852-2994-2101
Address	: Unit 211-213, Lakeside 1, 8 Science Park West Ave., Shatin, Hong Kong

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