How to access Ubuntu update servers
When you create a virtual machine (VM) with an Ubuntu licence on it, you need to register the VM in order to receive updates for it. This guide explains how to access the Ubuntu repository servers to receive updates.
Before you attempt to establish connections to an Ubuntu repository server, you need to make sure your VMs can communicate with the Ubuntu server which exists outside of your cloud organisation. This may involve editing the NAT and firewall settings within your edge gateway to allow traffic to traverse into your virtual data centre (VDC). For how to do this, see the How to create NAT rules and How to create firewall rules.
Assured OFFICIAL platform
UKCloud's Assured OFFICIAL platform is internet facing, so you can either configure your VM to connect to the internet, and use standard update tools such as apt-get to talk directly to the publicly available Ubuntu repositories or you can use the UKCloud-managed repository servers.
Elevated OFFICIAL platform
UKCloud's Elevated OFFICIAL platform doesn't have native access to Ubuntu repository servers. To connect to an Ubuntu repository server for updates, you can use UKCloud-managed repository servers or a UKCloud Walled Garden.
There are two prerequisites for accessing Ubuntu update servers:
The VM must be able to resolve to the repository server DNS records (contact UKCloud Support for the IP addresses for the Elevated records). You can achieve this several different ways:
Use internet DNS records to resolve the Assured repository server
Configure an A record on your local DNS for the Elevated repository server
/etc/hostsfile entry with the appropriate information
All VMs using the service must be able to access the repository servers on port TCP/443 (HTTPS). Ensure that you have configured SNAT and firewall policies on your edge gateway device. If you have any questions about this, contact UKCloud Support.
Accessing Ubuntu update servers
UKCloud-managed repository servers
The repository servers listed below are accessible only from within the UKCloud network.
We provide Ubuntu repositories for the 16.04 (Xenial), 18.04 (Bionic) and 20.04 (Focal) LTS versions of Ubuntu on both our Assured OFFICIAL and Elevated OFFICIAL security domains, so that customers with Ubuntu VMs can get software updates. To do this, issue the appropriate command for your release of Ubuntu to download a repository list file to your apt sources directory.
sudo wget -P /etc/apt/sources.list.d https://rh-cds.ukcloud.com/ubuntu/repofiles/ukcloud_xenial.list
sudo wget -P /etc/apt/sources.list.d https://rh-cds.ukcloud.com/ubuntu/repofiles/ukcloud_bionic.list
sudo wget -P /etc/apt/sources.list.d https://rh-cds.ukcloud.com/ubuntu/repofiles/ukcloud_focal.list
We also recommend that you rename the default
/etc/apt/sources.list file to reduce the likelihood of errors during the update process that stem from attempts to access the internet-based Canonical Partner repositories. To do this, use the following command:
sudo mv /etc/apt/sources.list /etc/apt/sources.list.old
Choose this option only if you want full control of Ubuntu updates and are already thinking of deploying a UKCloud Walled Garden. This option involves pulling updates into the Assured platform and using UKCloud's Walled Garden to move them to the Elevated platform.
It's a much more complex solution than using UKCloud-managed repository servers and you have sole responsibility for deploying and managing it.
For more information about the Walled Garden, see the Getting Started Guide for Cross Domain Security Zone.
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