We encountered a strange issue this week inside our AKS cluster. We discovered that the time was not synced between the different pods and nodes.
We noticed this because we couldn’t use our OAuth security tokens as the IssuedAt timing was off.
To validate this issue we ssh’d into the nodes and ran the following command:
$: sudo timedatectl status
This resulted in the following output
Local time: Wed 2021-6-2 13:48:44 UTC
Universal time: Wed 2021-6-2 13:48:44 UTC
RTC time: Wed 2021-6-2 13:48:44
Time zone: Etc/UTC (UTC, +0000)
Network time on: yes
RTC in local TZ: no
The NTP service was disabled and no NTP service was configured. To fix it we opened the timesyncd.conf:
$: sudo cat /etc/systemd/timesyncd.conf
and changed the NTP value
[Time]
NTP=ntp.ubuntu.com
After that we restarted the timesync service:
$: sudo timedatectl set-ntp true
$: sudo systemctl restart systemd-timesyncd.service
Of course this is only good as a temporary workaround. I would expect that this is enabled by default.
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