[systemd-devel] Temporarily stopping a service while oneshot is running

Lennart Poettering lennart at poettering.net
Thu Mar 30 14:13:25 UTC 2017

On Tue, 21.03.17 07:47, Ian Pilcher (arequipeno at gmail.com) wrote:

> I have a oneshot service (run from a timer) that updates the TLS
> certificates in my mod_nss database.  Because NSS doesn't support
> concurrent access to the database, I need to temporarily shut down
> Apache while the certificate update service is running.
> Currently, I'm using the following entries in my .service file to
> accomplish this:
>   [Unit]
>   Description=Update TLS certificates in mod_nss database
>   # Restart Apache, even if this service fails for some reason
>   OnFailure=httpd.service
>   [Service]
>   Type=oneshot
>   # Shut down Apache to avoid concurrent access to the mod_nss database
>   ExecStartPre=/usr/bin/systemctl stop httpd.service
>   ExecStart=/usr/local/bin/update-nss-certs
>   ExecStartPost=/usr/bin/systemctl start httpd.service
> Is this the best way to do this?  (I can't escape the feeling that there
> ought to be a more idiomatic way of accomplishing this.)

Yes, this appears to be the best, and simplest way to do this to me.


Lennart Poettering, Red Hat

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