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Update to Kubernetes 1.32.3

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Kelsey Hightower
2025-04-06 18:32:30 -07:00
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commit 08b198f2a0
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docs/09-bootstrapping-kubernetes-workers.md
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@@ -1,20 +1,22 @@
# Bootstrapping the Kubernetes Worker Nodes
In this lab you will bootstrap two Kubernetes worker nodes. The following components will be installed: [runc](https://github.com/opencontainers/runc), [container networking plugins](https://github.com/containernetworking/cni), [containerd](https://github.com/containerd/containerd), [kubelet](https://kubernetes.io/docs/admin/kubelet), and [kube-proxy](https://kubernetes.io/docs/concepts/cluster-administration/proxies).
In this lab you will bootstrap two Kubernetes worker nodes. The following components will be installed: [runc](https://github.com/opencontainers/runc), [container networking plugins](https://github.com/containernetworking/cni), [containerd](https://github.com/containerd/containerd), [kubelet](https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet), and [kube-proxy](https://kubernetes.io/docs/concepts/cluster-administration/proxies).
## Prerequisites
Copy Kubernetes binaries and systemd unit files to each worker instance:
The commands in this section must be run from the `jumpbox`.
Copy the Kubernetes binaries and systemd unit files to each worker instance:
```bash
for host in node-0 node-1; do
SUBNET=$(grep $host machines.txt | cut -d " " -f 4)
sed "s|SUBNET|$SUBNET|g" \
configs/10-bridge.conf > 10-bridge.conf
configs/10-bridge.conf > 10-bridge.conf
sed "s|SUBNET|$SUBNET|g" \
configs/kubelet-config.yaml > kubelet-config.yaml
scp 10-bridge.conf kubelet-config.yaml \
root@$host:~/
done
@@ -24,15 +26,14 @@ done
for host in node-0 node-1; do
scp \
downloads/runc.arm64 \
downloads/crictl-v1.31.1-linux-arm64.tar.gz \
downloads/cni-plugins-linux-arm64-v1.6.0.tgz \
downloads/containerd-2.0.0-linux-arm64.tar.gz \
downloads/crictl-v1.32.0-linux-arm64.tar.gz \
downloads/cni-plugins-linux-arm64-v1.6.2.tgz \
downloads/containerd-2.1.0-beta.0-linux-arm64.tar.gz \
downloads/kubectl \
downloads/kubelet \
downloads/kube-proxy \
configs/99-loopback.conf \
configs/containerd-config.toml \
configs/kubelet-config.yaml \
configs/kube-proxy-config.yaml \
units/containerd.service \
units/kubelet.service \
@@ -41,7 +42,7 @@ for host in node-0 node-1; do
done
```
The commands in this lab must be run on each worker instance: `node-0`, `node-1`. Login to the worker instance using the `ssh` command. Example:
The commands in the next section must be run on each worker instance: `node-0`, `node-1`. Login to the worker instance using the `ssh` command. Example:
```bash
ssh root@node-0
@@ -54,23 +55,23 @@ Install the OS dependencies:
```bash
{
apt-get update
apt-get -y install socat conntrack ipset
apt-get -y install socat conntrack ipset kmod
}
```
> The socat binary enables support for the `kubectl port-forward` command.
### Disable Swap
Disable Swap
By default, the kubelet will fail to start if [swap](https://help.ubuntu.com/community/SwapFaq) is enabled. It is [recommended](https://github.com/kubernetes/kubernetes/issues/7294) that swap be disabled to ensure Kubernetes can provide proper resource allocation and quality of service.
Kubernetes has limited support for the use of swap memory, as it is difficult to provide guarantees and account for pod memory utilization when swap is involved.
Verify if swap is enabled:
Verify if swap is disabled:
```bash
swapon --show
```
If output is empty then swap is not enabled. If swap is enabled run the following command to disable swap immediately:
If output is empty then swap is disabled. If swap is enabled run the following command to disable swap immediately:
```bash
swapoff -a
@@ -95,11 +96,11 @@ Install the worker binaries:
```bash
{
mkdir -p containerd
tar -xvf crictl-v1.31.1-linux-arm64.tar.gz
tar -xvf containerd-2.0.0-linux-arm64.tar.gz -C containerd
tar -xvf cni-plugins-linux-arm64-v1.6.0.tgz -C /opt/cni/bin/
tar -xvf crictl-v1.32.0-linux-arm64.tar.gz
tar -xvf containerd-2.1.0-beta.0-linux-arm64.tar.gz -C containerd
tar -xvf cni-plugins-linux-arm64-v1.6.2.tgz -C /opt/cni/bin/
mv runc.arm64 runc
chmod +x crictl kubectl kube-proxy kubelet runc
chmod +x crictl kubectl kube-proxy kubelet runc
mv crictl kubectl kube-proxy kubelet runc /usr/local/bin/
mv containerd/bin/* /bin/
}
@@ -155,9 +156,11 @@ Create the `kubelet-config.yaml` configuration file:
}
```
Be sure to complete the steps in this section on each worker node, `node-0` and `node-1`, before moving on to the next section.
## Verification
The compute instances created in this tutorial will not have permission to complete this section. Run the following commands from the `jumpbox` machine.
Run the following commands from the `jumpbox` machine.
List the registered Kubernetes nodes:
@@ -169,8 +172,8 @@ ssh root@server \
```
NAME STATUS ROLES AGE VERSION
node-0 Ready <none> 1m v1.31.2
node-1 Ready <none> 10s v1.31.2
node-0 Ready <none> 1m v1.32.3
node-1 Ready <none> 10s v1.32.3
```
Next: [Configuring kubectl for Remote Access](10-configuring-kubectl.md)