Unifi-Controller on Ulis Notes https://wolf-u.li/en/tag/unifi-controller/ Recent content in Unifi-Controller on Ulis Notes Hugo en Copyright 2006-CURRENTYEAR Uli Wolf - All rights reserved Mon, 22 Aug 2022 08:24:29 +2200 Unifi Dream Router (UDR) - Setup of the NTP Server https://wolf-u.li/unifi-dream-router-udr-setup-of-the-ntp-server/ Mon, 22 Aug 2022 08:24:29 +2200 https://wolf-u.li/unifi-dream-router-udr-setup-of-the-ntp-server/ <p>After i had installed my new Unifi Dream Router i discovered after a while that the time of some of the devices in my network was screwed up. After a bit of research i found that the UDR (in contrast to my previous Unifi Gateway) doesn&rsquo;t feature NTP. Hence i had a pretty timeless setup.</p> <ins class="adsbygoogle" style="display:block; text-align:center;" data-ad-layout="in-article" data-ad-format="fluid" data-ad-client="ca-pub-2322978122735420" data-ad-slot="3161252284"></ins> <h2 id="setup-of-podman">Setup of podman</h2> <p>The NTP server is setup in a <link rel=dns-prefetch href=//hub.docker.com /> <a href="https://hub.docker.com/r/tusc/chrony-udm" title="container" target="_blank" rel="nofollow noopener noreferrer" > container&nbsp;<svg xmlns="http://www.w3.org/2000/svg" class="icon" aria-hidden="true" focusable="false" viewBox="0 -128 512 640"> <path d="M384 320c-17.67 0-32 14.33-32 32v96H64V160h96c17.67 0 32-14.32 32-32s-14.33-32-32-32L64 96c-35.35 0-64 28.65-64 64V448c0 35.34 28.65 64 64 64h288c35.35 0 64-28.66 64-64v-96C416 334.3 401.7 320 384 320zM488 0H352c-12.94 0-24.62 7.797-29.56 19.75c-4.969 11.97-2.219 25.72 6.938 34.88L370.8 96L169.4 297.4c-12.5 12.5-12.5 32.75 0 45.25C175.6 348.9 183.8 352 192 352s16.38-3.125 22.62-9.375L416 141.3l41.38 41.38c9.156 9.141 22.88 11.84 34.88 6.938C504.2 184.6 512 172.9 512 160V24C512 10.74 501.3 0 488 0z"/> </svg></a>, hence it is important to <a href="https://wolf-u.li/en/unifi-dream-router-udr-setup-of-podman/" title="first setup podman on the UDR" > first setup podman on the UDR</a>.</p> After i had installed my new Unifi Dream Router i discovered after a while that the time of some of the devices in my network was screwed up. After a bit of research i found that the UDR (in contrast to my previous Unifi Gateway) doesn’t feature NTP. Hence i had a pretty timeless setup.

Setup of podman

The NTP server is setup in a container , hence it is important to first setup podman on the UDR.

Setup of the NTP Container

To automatically start the container, the respective file has to be created. This is done through the following command:

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cat > /data/on_boot.d/20-ntp.sh <<EOF
#!/bin/sh
CONTAINER=ntp
if podman container exists ${CONTAINER}; then
  podman start ${CONTAINER}
else
  podman run --device=/dev/net/tun --publish=123:123/udp --cap-add=SYS_TIME --name ${CONTAINER} -d tusc/chrony-udm
fi
EOF
chmod a+x /data/on_boot.d/20-ntp.sh

Now pull the container:

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podman pull tusc/chrony-udm

And start the container:

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/data/on_boot.d/20-ntp.sh

Sources

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