https://tech.uvoo.io/index.php?action=history&feed=atom&title=Kubernetes_Bare_Metal 2026-08-03T13:14:29Z Revision history for this page on the wiki MediaWiki 1.35.2 https://tech.uvoo.io/index.php?title=Kubernetes_Bare_Metal&diff=5731&oldid=prev 2026-08-01T19:26:06Z

<p>Created page with &quot;https://www.digitalocean.com/community/tutorials/bare-metal-kubernetes You probably want to use cloud-init like this Ubuntu 24.04 `cloud-init` configuration for provisioning...&quot;</p> <p><b>New page</b></p><div>https://www.digitalocean.com/community/tutorials/bare-metal-kubernetes<br /> <br /> You probably want to use cloud-init like this Ubuntu 24.04<br /> <br /> `cloud-init` configuration for provisioning Kubernetes nodes on **Ubuntu 24.04 LTS**.<br /> <br /> This script handles:<br /> <br /> * Disabling swap (required by `kubelet`)<br /> * Enabling necessary kernel modules (`overlay`, `br_netfilter`)<br /> * Setting required `sysctl` networking parameters<br /> * Installing and configuring `containerd` with the `SystemdCgroup` driver enabled<br /> * Adding the official `pkgs.k8s.io` repository (configured for Kubernetes **v1.30**)<br /> * Installing and locking (`apt-mark hold`) `kubelet`, `kubeadm`, and `kubectl`<br /> <br /> ---<br /> <br /> ## Cloud-Init YAML (`user-data`)<br /> <br /> ```yaml<br /> #cloud-config<br /> package_update: true<br /> package_upgrade: false<br /> <br /> packages:<br /> - apt-transport-https<br /> - ca-certificates<br /> - curl<br /> - gpg<br /> - containerd<br /> <br /> write_files:<br /> # Enable required kernel modules for container networking<br /> - path: /etc/modules-load.d/k8s.conf<br /> permissions: '0644'<br /> content: |<br /> overlay<br /> br_netfilter<br /> <br /> # Set sysctl rules for iptables bridge &amp; IP forwarding<br /> - path: /etc/sysctl.d/k8s.conf<br /> permissions: '0644'<br /> content: |<br /> net.bridge.bridge-nf-call-iptables = 1<br /> net.bridge.bridge-nf-call-ip6tables = 1<br /> net.ipv4.ip_forward = 1<br /> <br /> runcmd:<br /> # 1. Disable swap immediately and persistently across reboots<br /> - swapoff -a<br /> - sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab<br /> <br /> # 2. Load kernel modules and apply sysctl settings<br /> - modprobe overlay<br /> - modprobe br_netfilter<br /> - sysctl --system<br /> <br /> # 3. Configure containerd with SystemdCgroup enabled<br /> - mkdir -p /etc/containerd<br /> - containerd config default | tee /etc/containerd/config.toml &gt; /dev/null<br /> - sed -i 's/SystemdCgroup = false/SystemdCgroup = true/g' /etc/containerd/config.toml<br /> - systemctl restart containerd<br /> - systemctl enable containerd<br /> <br /> # 4. Add official Kubernetes v1.30 apt repository<br /> - mkdir -p -m 755 /etc/apt/keyrings<br /> - curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg<br /> - chmod 644 /etc/apt/keyrings/kubernetes-apt-keyring.gpg<br /> - echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /' | tee /etc/apt/sources.list.d/kubernetes.list<br /> <br /> # 5. Install Kubernetes binaries and prevent auto-upgrades<br /> - apt-get update<br /> - apt-get install -y kubelet kubeadm kubectl<br /> - apt-mark hold kubelet kubeadm kubectl<br /> - systemctl enable --now kubelet<br /> <br /> ```<br /> <br /> ---<br /> <br /> ## Next Steps After Boot<br /> <br /> Once your machine finishes running `cloud-init`, choose your role:<br /> <br /> ### For the Control Plane (Master Node)<br /> <br /> Initialize the cluster with your control plane IP and preferred pod CIDR (e.g., Flannel/Calico):<br /> <br /> ```bash<br /> sudo kubeadm init --pod-network-cidr=10.244.0.0/16<br /> <br /> ```<br /> <br /> ### For Worker Nodes<br /> <br /> Run the `kubeadm join` command provided at the end of your control plane's `kubeadm init` output.</div>

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