[ClusterLabs] Q: Is there any plan for pcs to support corosync-notifyd?

[Klaus Wenninger]

On 3/18/21 9:29 AM, 井上和徳 wrote:
> On Tue, Mar 16, 2021 at 10:23 PM Jehan-Guillaume de Rorthais
> <jgdr at dalibo.com> wrote:
>>> On Tue, 16 Mar 2021, 09:58 井上和徳, <kazunori_inoue at newson.co.jp> wrote:
>>>
>>>> Hi!
>>>>
>>>> Cluster (corosync and pacemaker) can be started with pcs,
>>>> but corosync-notifyd needs to be started separately with systemctl,
>>>> which is not easy to use.
>> Maybe you can add to the [Install] section of corosync-notifyd a dependency
>> with corosync? Eg.:
>>
>>    WantedBy=corosync.service
>>
>> (use systemctl edit corosync-notifyd)
>>
>> Then re-enable the service (without starting it by hands).
> I appreciate your proposal. How to use WantedBy was helpful!
> However, since I want to start the cluster (corosync, pacemaker) only manually,
> it is unacceptable to start corosync along with corosync-notifyd at OS
> boot time.
Hmm ... isn't WantedBy rather there to enable certain services as a group?
Maybe PartOf is more what you want here.
You can still control with enable/disable if you want corosync-notifyd 
or not.
The actual starting/stopping would be done automatically whenever
corosync is started/stopped - regardless if manually or at boot.

Regards,
Klaus
>
> Disabling the dependency (Requires=corosync.service) on corosync-notifyd.service
> will prevent corosync from starting at OS boot, but will cause corosync-notifyd
> to fail, which may confuse users.
> # sytemctl reboot
>   :
> # grep "notifyd.*error" /var/log/messages
> Mar 18 12:09:54 rhel83-1 <daemon.err> notifyd[949]:[error] Failed to
> initialize the cmap API. Error 2
> Mar 18 12:09:54 rhel83-1 <daemon.err> notifyd[978]:[error] Failed to
> initialize the cmap API. Error 2
> Mar 18 12:09:55 rhel83-1 <daemon.err> notifyd[1014]:[error] Failed to
> initialize the cmap API. Error 2
> Mar 18 12:09:55 rhel83-1 <daemon.err> notifyd[1021]:[error] Failed to
> initialize the cmap API. Error 2
> Mar 18 12:09:55 rhel83-1 <daemon.err> notifyd[1025]:[error] Failed to
> initialize the cmap API. Error 2
>
> Regards,
> Kazunori INOUE
>
>
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