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docs/09-bootstrapping-kubernetes-workers.md
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@ -4,10 +4,10 @@ In this lab you will bootstrap three Kubernetes worker nodes. The following comp
## Prerequisites
The commands in this lab must be run on each worker instance: `worker-0`, `worker-1`, and `worker-2`. Login to each worker instance using the `gcloud` command. Example:
The commands in this lab must be run on each worker instance: `worker-0`, `worker-1`, and `worker-2`. Login to each worker instance using the `ssh` command. Example:
```bash
gcloud compute ssh worker-0
ssh worker-0
```
### Running commands in parallel with tmux
@ -19,10 +19,8 @@ gcloud compute ssh worker-0
Install the OS dependencies:
```bash
{
sudo apt-get update
sudo apt-get -y install socat conntrack ipset
}
sudo apt-get update
sudo apt-get -y install socat conntrack ipset
```
> The socat binary enables support for the `kubectl port-forward` command.
@ -73,27 +71,26 @@ sudo mkdir -p \
Install the worker binaries:
```bash
{
mkdir containerd
tar -xvf crictl-v1.15.0-linux-amd64.tar.gz
tar -xvf containerd-1.2.9.linux-amd64.tar.gz -C containerd
sudo tar -xvf cni-plugins-linux-amd64-v0.8.2.tgz -C /opt/cni/bin/
sudo mv runc.amd64 runc
chmod +x crictl kubectl kube-proxy kubelet runc
sudo mv crictl kubectl kube-proxy kubelet runc /usr/local/bin/
sudo mv containerd/bin/* /bin/
}
mkdir containerd
tar -xvf crictl-v1.15.0-linux-amd64.tar.gz
tar -xvf containerd-1.2.9.linux-amd64.tar.gz -C containerd
sudo tar -xvf cni-plugins-linux-amd64-v0.8.2.tgz -C /opt/cni/bin/
sudo mv runc.amd64 runc
chmod +x crictl kubectl kube-proxy kubelet runc
sudo mv crictl kubectl kube-proxy kubelet runc /usr/local/bin/
sudo mv containerd/bin/* /bin/
```
### Configure CNI Networking
Retrieve the Pod CIDR range for the current compute instance:
Define the Pod CIDR range for the current node (different for each worker). Replace THE_POD_CIDR by the CIDR network for this node (see network architecture):
```bash
POD_CIDR=$(curl -s -H "Metadata-Flavor: Google" \
http://metadata.google.internal/computeMetadata/v1/instance/attributes/pod-cidr)
POD_CIDR=THE_POD_CIDR
```
> Example for worker-0: 10.200.0.0/24
Create the `bridge` network configuration file:
```bash
@ -177,11 +174,9 @@ EOF
### Configure the Kubelet
```bash
{
sudo mv ${HOSTNAME}-key.pem ${HOSTNAME}.pem /var/lib/kubelet/
sudo mv ${HOSTNAME}.kubeconfig /var/lib/kubelet/kubeconfig
sudo mv ca.pem /var/lib/kubernetes/
}
sudo mv ${HOSTNAME}-key.pem ${HOSTNAME}.pem /var/lib/kubelet/
sudo mv ${HOSTNAME}.kubeconfig /var/lib/kubelet/kubeconfig
sudo mv ca.pem /var/lib/kubernetes/
```
Create the `kubelet-config.yaml` configuration file:
@ -281,27 +276,22 @@ EOF
### Start the Worker Services
```bash
{
sudo systemctl daemon-reload
sudo systemctl enable containerd kubelet kube-proxy
sudo systemctl start containerd kubelet kube-proxy
}
sudo systemctl daemon-reload
sudo systemctl enable containerd kubelet kube-proxy
sudo systemctl start containerd kubelet kube-proxy
```
> Remember to run the above commands on each worker node: `worker-0`, `worker-1`, and `worker-2`.
## Verification
> The compute instances created in this tutorial will not have permission to complete this section. Run the following commands from the same machine used to create the compute instances.
List the registered Kubernetes nodes:
```bash
gcloud compute ssh controller-0 \
--command "kubectl get nodes --kubeconfig admin.kubeconfig"
ssh root@controller-0 kubectl get nodes --kubeconfig admin.kubeconfig
```
> output
> Output:
```bash
NAME STATUS ROLES AGE VERSION