Update source for flatcar sysexts

Author: nojnhuh

docs/book/src/self-managed/flatcar.md

@@ -12,7 +12,7 @@ The template comes with a [systemd-sysupdate](https://www.freedesktop.org/softwa
   * Update the template to enable the `systemd-sysupdate.timer`
   * Or run the following command on the nodes: `sudo systemctl enable --now systemd-sysupdate.timer`
 
-When the Kubernetes release reaches end-of-life it will not receive updates anymore. To switch to a new major version, do a `sudo rm /etc/sysupdate.kubernetes.d/kubernetes-*.conf` and download the new update config into the folder with `cd /etc/sysupdate.kubernetes.d && sudo wget https://github.com/flatcar/sysext-bakery/releases/download/latest/kubernetes-${KUBERNETES_VERSION%.*}.conf`.
+When the Kubernetes release reaches end-of-life it will not receive updates anymore. To switch to a new major version, do a `sudo rm /etc/sysupdate.kubernetes.d/kubernetes-*.conf` and download the new update config into the folder with `cd /etc/sysupdate.kubernetes.d && sudo wget https://extensions.flatcar.org/extensions/kubernetes/kubernetes-${KUBERNETES_VERSION%.*}.conf`.
 
 To coordinate the node reboot, we recommend using [Kured](https://github.com/kubereboot/kured). Note that running `kubeadm upgrade apply` on the first controller and `kubeadm upgrade node` on all other nodes is not automated (yet): see the [docs](https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade/).
 

templates/cluster-template-flatcar-sysext.yaml

@@ -70,16 +70,16 @@ spec:
                 mode: 0644
                 contents:
                   remote:
-                    url: https://github.com/flatcar/sysext-bakery/releases/download/latest/kubernetes-${KUBERNETES_VERSION%.*}.conf
+                    url: https://extensions.flatcar.org/extensions/kubernetes/kubernetes-${KUBERNETES_VERSION%.*}.conf
               - path: /etc/sysupdate.d/noop.conf
                 mode: 0644
                 contents:
                   remote:
-                    url: https://github.com/flatcar/sysext-bakery/releases/download/latest/noop.conf
+                    url: https://extensions.flatcar.org/extensions/noop.conf
               - path: /opt/extensions/kubernetes/kubernetes-${KUBERNETES_VERSION}-x86-64.raw
                 contents:
                   remote:
-                    url: https://github.com/flatcar/sysext-bakery/releases/download/latest/kubernetes-${KUBERNETES_VERSION}-x86-64.raw
+                    url: https://extensions.flatcar.org/extensions/kubernetes-${KUBERNETES_VERSION}-x86-64.raw
             systemd:
               units:
               - name: systemd-sysupdate.service

templates/flavors/flatcar-sysext/machine-deployment.yaml

@@ -64,16 +64,16 @@ spec:
               mode: 0644
               contents:
                 remote:
-                  url: https://github.com/flatcar/sysext-bakery/releases/download/latest/kubernetes-${KUBERNETES_VERSION%.*}.conf
+                  url: https://extensions.flatcar.org/extensions/kubernetes/kubernetes-${KUBERNETES_VERSION%.*}.conf
             - path: /etc/sysupdate.d/noop.conf
               mode: 0644
               contents:
                 remote:
-                  url: https://github.com/flatcar/sysext-bakery/releases/download/latest/noop.conf
+                  url: https://extensions.flatcar.org/extensions/noop.conf
             - path: /opt/extensions/kubernetes/kubernetes-${KUBERNETES_VERSION}-x86-64.raw
               contents:
                 remote:
-                  url: https://github.com/flatcar/sysext-bakery/releases/download/latest/kubernetes-${KUBERNETES_VERSION}-x86-64.raw
+                  url: https://extensions.flatcar.org/extensions/kubernetes-${KUBERNETES_VERSION}-x86-64.raw
     initConfiguration:
       nodeRegistration:
         name: '@@HOSTNAME@@'