update docs
Kelsey Hightower
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@ -28,13 +28,7 @@ Each component is being run on the same machines for the following reasons:
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```
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gcloud compute copy-files ca.pem kubernetes-key.pem kubernetes.pem controller0:~/
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```
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```
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gcloud compute copy-files ca.pem kubernetes-key.pem kubernetes.pem controller1:~/
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```
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```
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gcloud compute copy-files ca.pem kubernetes-key.pem kubernetes.pem controller2:~/
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```
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@ -0,0 +1,185 @@
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# Bootstrapping Kubernetes Workers
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In this lab you will bootstrap a 3 Kubernetes worker nodes. The following virtual machines will be used:
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```
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NAME ZONE MACHINE_TYPE INTERNAL_IP STATUS
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worker0 us-central1-f n1-standard-1 10.240.0.30 RUNNING
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worker1 us-central1-f n1-standard-1 10.240.0.31 RUNNING
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worker2 us-central1-f n1-standard-1 10.240.0.32 RUNNING
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```
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## Why
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Kubernetes worker nodes are responsible for running your containers. All Kubernetes clusters need one or more worker nodes. We are running the worker nodes on dedicated machines for the following reasons:
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* Ease of deployment and configuration
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* Avoid mixing arbitrary workloads with critical cluster components. We are building machine with just enough resources so we don't have to worry about wasting resources.
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Some people would like to run workers and cluster services anywhere in the cluster. This is totally possible, and you'll have to decide what's best for your environment.
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## Copy TLS Certs
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```
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gcloud compute copy-files ca.pem kubernetes-key.pem kubernetes.pem worker0:~/
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gcloud compute copy-files ca.pem kubernetes-key.pem kubernetes.pem worker1:~/
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gcloud compute copy-files ca.pem kubernetes-key.pem kubernetes.pem worker2:~/
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```
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## Provision the Kubernetes Worker Nodes
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### worker0
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```
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gcloud compute ssh worker0
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```
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#### Move the TLS certificates in place
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```
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sudo mkdir -p /var/run/kubernetes
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```
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```
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sudo mv ca.pem kubernetes-key.pem kubernetes.pem /var/run/kubernetes/
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```
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#### Docker
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Kubernetes should be compatible with the Docker 1.9.x - 1.11.x:
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```
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wget https://get.docker.com/builds/Linux/x86_64/docker-1.11.2.tgz
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```
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```
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tar -xvf docker-1.11.2.tgz
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```
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```
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sudo cp docker/docker /usr/bin/
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sudo cp docker/docker-containerd /usr/bin/
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sudo cp docker/docker-containerd-ctr /usr/bin/
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sudo cp docker/docker-containerd-shim /usr/bin/
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sudo cp docker/docker-runc /usr/bin/
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```
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Create the Docker systemd unit file:
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```
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sudo sh -c 'echo "[Unit]
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Description=Docker Application Container Engine
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Documentation=http://docs.docker.io
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[Service]
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ExecStart=/usr/bin/docker daemon \
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--iptables=false \
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--ip-masq=false \
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--host=unix:///var/run/docker.sock \
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--log-level=error \
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--storage-driver=overlay
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Restart=on-failure
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RestartSec=5
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[Install]
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WantedBy=multi-user.target" > /etc/systemd/system/docker.service'
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```
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```
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sudo systemctl daemon-reload
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sudo systemctl enable docker
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sudo systemctl start docker
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```
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```
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sudo docker version
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```
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#### kubelet
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Download and install the Kubernetes worker binaries:
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```
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wget https://github.com/kubernetes/kubernetes/releases/download/v1.3.0/kubernetes.tar.gz
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```
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```
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tar -xvf kubernetes.tar.gz
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```
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```
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tar -xvf kubernetes/server/kubernetes-server-linux-amd64.tar.gz
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```
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```
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sudo cp kubernetes/server/bin/kubectl /usr/bin/
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sudo cp kubernetes/server/bin/kube-proxy /usr/bin/
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sudo cp kubernetes/server/bin/kubelet /usr/bin/
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```
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```
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mkdir -p /var/lib/kubelet/
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```
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```
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sudo sh -c 'echo "apiVersion: v1
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kind: Config
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clusters:
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- cluster:
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certificate-authority: /var/run/kubernetes/ca.pem
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server: https://10.240.0.20:6443
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name: kubernetes
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contexts:
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- context:
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cluster: kubernetes
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user: kubelet
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name: kubelet
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current-context: kubelet
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users:
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- name: kubelet
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user:
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token: chAng3m3" > /var/lib/kubelet/kubeconfig'
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```
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Create the kubelet systemd unit file:
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```
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sudo sh -c 'echo "[Unit]
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Description=Kubernetes Kubelet
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Documentation=https://github.com/GoogleCloudPlatform/kubernetes
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After=docker.service
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Requires=docker.service
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[Service]
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ExecStart=/usr/bin/kubelet \
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--allow-privileged=true \
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--api-servers=https://10.240.0.20:6443,https://10.240.0.21:6443,https://10.240.0.22:6443 \
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--cloud-provider=
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--cluster-dns=10.32.0.10 \
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--cluster-domain=cluster.local \
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--container-runtime=docker \
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--docker=unix:///var/run/docker.sock \
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--kubeconfig=/var/lib/kubelet/kubeconfig \
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--reconcile-cidr=true \
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--serialize-image-pulls=false \
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--tls-cert-file=/var/run/kubernetes/kubernetes.pem
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--tls-private-key-file=/var/run/kubernetes/kubernetes-key.pem \
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--v=2
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Restart=on-failure
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RestartSec=5
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[Install]
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WantedBy=multi-user.target" > /etc/systemd/system/kubelet.service'
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```
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```
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sudo systemctl daemon-reload
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sudo systemctl enable kubelet
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sudo systemctl start kubelet
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```
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```
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sudo systemctl status kubelet
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```
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