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Well, to me it looks like the apparmor errors are irrelevant.
>From this log, I would assume that the dhcp client (PXE) has issues
with the DHCPOFFER that it is receiving (or perhaps it cannot see it)
as it sends DHCPDISCOVER again and again.

Can you squeeze anything from the faulty PXE node?
Did you manage to PXE boot any other machine?

-yoctozepto

On Mon, Apr 12, 2021 at 2:55 PM Braden, Albert
<C-Albert.Braden at charter.com> wrote:
>
> Apparmor is causing the errors. This Stack Exchange post explains how to read the error message:
>
> https://unix.stackexchange.com/questions/116591/why-am-i-getting-apparmor-error-messages-in-the-syslog-about-ntp-and-ldap
>
> -----Original Message-----
> From: toky0 <toky0ghoul at yandex.com>
> Sent: Monday, April 12, 2021 8:01 AM
> To: openstack-discuss at lists.openstack.org
> Subject: [EXTERNAL] MAAS dhcpd issue
>
> CAUTION: The e-mail below is from an external source. Please exercise caution before opening attachments, clicking links, or following guidance.
>
> Hi,
>
> Just started a maas+juju deployment on bare metal. I’m facing some errors while PXE booting[1].
> Any leads ?
>
> Regards,
> Sami
>
> [1]
> Mar 22 09:57:13 maas kernel: [ 1885.666813] audit: type=1400 audit(1616407033.279:95): apparmor="DENIED" operation="open" profile="snap.maas.supervisor" name="/etc/gss/mech.d/" pid=1131 comm="python3" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
> Mar 22 09:57:22 maas dhcpd[3861]: DHCPDISCOVER from 4c:52:62:44:0c:bb via eno1: network vlan-5002: no free leases
> Mar 22 09:57:37 maas systemd[1]: systemd-timedated.service: Succeeded.
> Mar 22 09:57:43 maas kernel: [ 1915.677372] audit: type=1400 audit(1616407063.291:96): apparmor="DENIED" operation="open" profile="snap.maas.supervisor" name="/etc/gss/mech.d/" pid=1132 comm="python3" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
> Mar 22 09:58:13 maas dhcpd[3861]: DHCPDISCOVER from 4c:52:62:44:13:f3 via eno1
> Mar 22 09:58:13 maas dhcpd[3861]: DHCPOFFER on 192.168.202.10 to 4c:52:62:44:13:f3 via eno1
> Mar 22 09:58:15 maas dhcpd[3861]: DHCPDISCOVER from 4c:52:62:44:13:f3 via eno1
> Mar 22 09:58:15 maas dhcpd[3861]: DHCPOFFER on 192.168.202.10 to 4c:52:62:44:13:f3 via eno1
> Mar 22 09:58:17 maas dhcpd[3861]: DHCPDISCOVER from 4c:52:62:44:13:f3 via eno1
> Mar 22 09:58:17 maas dhcpd[3861]: DHCPOFFER on 192.168.202.10 to 4c:52:62:44:13:f3 via eno1
> Mar 22 09:58:21 maas dhcpd[3861]: DHCPDISCOVER from 4c:52:62:44:13:f3 via eno1
> Mar 22 09:58:21 maas dhcpd[3861]: DHCPOFFER on 192.168.202.10 to 4c:52:62:44:13:f3 via eno1
> Mar 22 09:59:13 maas kernel: [ 2005.666324] audit: type=1400 audit(1616407153.280:97): apparmor="DENIED" operation="open" profile="snap.maas.supervisor" name="/etc/gss/mech.d/" pid=1134 comm="python3" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
> Mar 22 09:59:43 maas kernel: [ 2035.667450] audit: type=1400 audit(1616407183.280:98): apparmor="DENIED" operation="open" profile="snap.maas.supervisor" name="/etc/gss/mech.d/" pid=1134 comm="python3" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
>
>
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