[Kea-users] ISC-KEA with MariaDB on Debian Buster Startup Sequence

perl-list perl-list at network1.net
Wed Sep 22 14:04:04 UTC 2021


I think you just want to have one After= line like so:

After=network-online.target time-sync.target mysql.service mariadb.service

at least thats how the radiusd.service file was on our server here.  This is on Redhat Enterprise Linux 8.x but it should be similar systemd implementations.

----- Original Message -----
> From: "PeterP" <looms_pastels_0f_kea at icloud.com>
> To: "kea-users" <kea-users at lists.isc.org>
> Sent: Wednesday, September 22, 2021 9:44:02 AM
> Subject: Re: [Kea-users] ISC-KEA with MariaDB on Debian Buster Startup Sequence

> Made the change and rebooted and it seems to have worked.

> File is "/usr/lib/systemd/system/isc-kea-dhcp4-server.service". Not absolutely
> sure this is the right file but it does seem to work.

> Now looks like ...

> [Unit]

> Description=Kea IPv4 DHCP daemon

> Documentation=man:kea-dhcp4(8)

> Wants=network-online.target

> After=network-online.target

> After=time-sync.target

> After=mysql.service

> After=mariadb.service

> [Service]

> User=_kea

> AmbientCapabilities=CAP_NET_BIND_SERVICE CAP_NET_RAW

> Environment="KEA_PIDFILE_DIR=/run/kea"

> Environment="KEA_LOCKFILE_DIR=/run/lock/kea"

> Environment="KEA_LOGGER_DESTINATION=/var/log/kea"

> ConfigurationDirectory=kea

> RuntimeDirectory=kea lock/kea

> RuntimeDirectoryPreserve=yes

> LogsDirectory=kea

> LogsDirectoryMode=0750

> StateDirectory=kea

> ExecStart=/usr/sbin/kea-dhcp4 -c /etc/kea/kea-dhcp4.conf

> ExecReload=/bin/kill -HUP $MAINPID

> [Install]

> WantedBy=multi-user.target

> Thank you,

> PeterP.

>> On 22 Sep 2021, at 14:35, perl-list <perl-list at network1.net> wrote:

>> find /etc/ | grep isc-kea-dhcp4-server.service

>> its in there somewhere I assume :)

>> ----- Original Message -----

>>> From: "PeterP" <looms_pastels_0f_kea at icloud.com>
>>> To: "kea-users" <kea-users at lists.isc.org>
>>> Sent: Wednesday, September 22, 2021 9:32:58 AM
>>> Subject: Re: [Kea-users] ISC-KEA with MariaDB on Debian Buster Startup Sequence

>>> Hello,

>>> Thank you, that aligns with what I had previously read, but I was struggling to
>>> work out how to express the relevant commands.

>>> I'll try your "After" clause in my isc-kea-dhcp4-server.service file (when I
>>> find it) with the mysql.service and mariadb.service service entries only.

>>> Regards,

>>> PeterP

>>>> On 22 Sep 2021, at 14:26, perl-list <perl-list at network1.net> wrote:

>>>> I don't know for sure as I have so far managed to largely avoid "systemd" but do
>>>> have some small experience with it.

>>>> radiusd.service on one of my servers has this:

>>>> After=syslog.target network-online.target ipa.service dirsrv.target
>>>> krb5kdc.service mysql.service mariadb.service postgresql.service

>>>> meaning all of those .target or .service files would need to finish before it
>>>> starts radiusd.service

>>>> You can probably tailor your After= line to be more relevant to your
>>>> configuration.

>>>> Someone correct me if there is a better way.

>>>> ----- Original Message -----

>>>>> From: "PeterP" <looms_pastels_0f_kea at icloud.com>
>>>>> To: "kea-users" <kea-users at lists.isc.org>
>>>>> Sent: Wednesday, September 22, 2021 8:42:32 AM
>>>>> Subject: [Kea-users] ISC-KEA with MariaDB on Debian Buster Startup Sequence

>>>>> Hello,

>>>>> I think this is somewhat of a Linux newbie question, so apologies.

>>>>> I have PowerDNS, KEA (DHCP4 only), and Stork running on Debian Buster all using
>>>>> MariaDB as the back-end. Everything is up to date as regards versions, at least
>>>>> as far as I am aware, as I run global updates every few days.

>>>>> I am having a problem with the isc-kea-dhcp4-server.service. Whenever there is a
>>>>> system reboot, this service fails to start. When I manually restart it later,
>>>>> it works fine. As far as I can trace, it's a startup sequence issue in relation
>>>>> to having MariaDB as a back-end for Kea. I looks like Kea is starting first,
>>>>> looking for the MariaDB service and failing because MariaDB has yet to start.

>>>>> How can I change the start order so that the isc-kea-dhcp4-server.service
>>>>> doesn't start until the MariaDB service is up and running?

>>>>> I expect I will have the same issue with the isc-kea-dhcp6-server.service when I
>>>>> eventually start to use it.

>>>>> Thank you,

>>>>> PeterP.

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