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https://github.com/kelseyhightower/kubernetes-the-hard-way.git
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update to kubernetes 1.8
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Kelsey Hightower
@@ -1,6 +1,6 @@
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# Bootstrapping the Kubernetes Worker Nodes
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In this lab you will bootstrap three Kubernetes worker nodes. The following components will be installed on each node: [runc](https://github.com/opencontainers/runc), [container networking plugins](https://github.com/containernetworking/cni), [cri-o](https://github.com/kubernetes-incubator/cri-o), [kubelet](https://kubernetes.io/docs/admin/kubelet), and [kube-proxy](https://kubernetes.io/docs/concepts/cluster-administration/proxies).
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In this lab you will bootstrap three Kubernetes worker nodes. The following components will be installed on each node: [runc](https://github.com/opencontainers/runc), [container networking plugins](https://github.com/containernetworking/cni), [cri-containerd](https://github.com/kubernetes-incubator/cri-containerd), [kubelet](https://kubernetes.io/docs/admin/kubelet), and [kube-proxy](https://kubernetes.io/docs/concepts/cluster-administration/proxies).
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## Prerequisites
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@@ -12,45 +12,31 @@ gcloud compute ssh worker-0
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## Provisioning a Kubernetes Worker Node
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### Install the cri-o OS Dependencies
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Add the `alexlarsson/flatpak` [PPA](https://launchpad.net/ubuntu/+ppas) which hosts the `libostree` package:
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Install the OS dependencies:
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```
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sudo add-apt-repository -y ppa:alexlarsson/flatpak
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sudo apt-get -y install socat
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```
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```
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sudo apt-get update
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```
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Install the OS dependencies required by the cri-o container runtime:
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```
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sudo apt-get install -y socat libgpgme11 libostree-1-1
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```
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> The socat binary enables support for the `kubectl port-forward` command.
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### Download and Install Worker Binaries
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```
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wget -q --show-progress --https-only --timestamping \
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https://github.com/containernetworking/plugins/releases/download/v0.6.0/cni-plugins-amd64-v0.6.0.tgz \
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https://github.com/opencontainers/runc/releases/download/v1.0.0-rc4/runc.amd64 \
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https://storage.googleapis.com/kubernetes-the-hard-way/crio-amd64-v1.0.0-beta.0.tar.gz \
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https://storage.googleapis.com/kubernetes-release/release/v1.7.4/bin/linux/amd64/kubectl \
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https://storage.googleapis.com/kubernetes-release/release/v1.7.4/bin/linux/amd64/kube-proxy \
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https://storage.googleapis.com/kubernetes-release/release/v1.7.4/bin/linux/amd64/kubelet
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https://github.com/kubernetes-incubator/cri-containerd/releases/download/v1.0.0-alpha.0/cri-containerd-1.0.0-alpha.0.tar.gz \
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https://storage.googleapis.com/kubernetes-release/release/v1.8.0/bin/linux/amd64/kubectl \
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https://storage.googleapis.com/kubernetes-release/release/v1.8.0/bin/linux/amd64/kube-proxy \
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https://storage.googleapis.com/kubernetes-release/release/v1.8.0/bin/linux/amd64/kubelet
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```
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Create the installation directories:
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```
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sudo mkdir -p \
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/etc/containers \
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/etc/cni/net.d \
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/etc/crio \
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/opt/cni/bin \
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/usr/local/libexec/crio \
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/var/lib/kubelet \
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/var/lib/kube-proxy \
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/var/lib/kubernetes \
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@@ -64,23 +50,15 @@ sudo tar -xvf cni-plugins-amd64-v0.6.0.tgz -C /opt/cni/bin/
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```
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```
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tar -xvf crio-amd64-v1.0.0-beta.0.tar.gz
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sudo tar -xvf cri-containerd-1.0.0-alpha.0.tar.gz -C /
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```
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```
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chmod +x kubectl kube-proxy kubelet runc.amd64
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chmod +x kubectl kube-proxy kubelet
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```
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```
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sudo mv runc.amd64 /usr/local/bin/runc
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```
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```
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sudo mv crio crioctl kpod kubectl kube-proxy kubelet /usr/local/bin/
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```
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```
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sudo mv conmon pause /usr/local/libexec/crio/
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sudo mv kubectl kube-proxy kubelet /usr/local/bin/
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```
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### Configure CNI Networking
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@@ -131,32 +109,6 @@ Move the network configuration files to the CNI configuration directory:
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sudo mv 10-bridge.conf 99-loopback.conf /etc/cni/net.d/
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```
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### Configure the CRI-O Container Runtime
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```
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sudo mv crio.conf seccomp.json /etc/crio/
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```
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```
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sudo mv policy.json /etc/containers/
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```
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```
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cat > crio.service <<EOF
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[Unit]
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Description=CRI-O daemon
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Documentation=https://github.com/kubernetes-incubator/cri-o
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[Service]
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ExecStart=/usr/local/bin/crio
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Restart=always
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RestartSec=10s
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[Install]
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WantedBy=multi-user.target
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EOF
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```
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### Configure the Kubelet
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```
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@@ -178,25 +130,26 @@ cat > kubelet.service <<EOF
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[Unit]
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Description=Kubernetes Kubelet
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Documentation=https://github.com/GoogleCloudPlatform/kubernetes
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After=crio.service
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Requires=crio.service
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After=cri-containerd.service
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Requires=cri-containerd.service
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[Service]
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ExecStart=/usr/local/bin/kubelet \\
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--allow-privileged=true \\
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--anonymous-auth=false \\
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--authorization-mode=Webhook \\
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--client-ca-file=/var/lib/kubernetes/ca.pem \\
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--cluster-dns=10.32.0.10 \\
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--cluster-domain=cluster.local \\
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--container-runtime=remote \\
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--container-runtime-endpoint=unix:///var/run/crio.sock \\
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--enable-custom-metrics \\
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--container-runtime-endpoint=unix:///var/run/cri-containerd.sock \\
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--image-pull-progress-deadline=2m \\
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--image-service-endpoint=unix:///var/run/crio.sock \\
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--kubeconfig=/var/lib/kubelet/kubeconfig \\
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--network-plugin=cni \\
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--pod-cidr=${POD_CIDR} \\
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--register-node=true \\
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--require-kubeconfig \\
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--runtime-request-timeout=10m \\
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--runtime-request-timeout=15m \\
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--tls-cert-file=/var/lib/kubelet/${HOSTNAME}.pem \\
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--tls-private-key-file=/var/lib/kubelet/${HOSTNAME}-key.pem \\
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--v=2
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@@ -239,7 +192,7 @@ EOF
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### Start the Worker Services
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```
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sudo mv crio.service kubelet.service kube-proxy.service /etc/systemd/system/
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sudo mv kubelet.service kube-proxy.service /etc/systemd/system/
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```
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```
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@@ -247,11 +200,11 @@ sudo systemctl daemon-reload
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```
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```
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sudo systemctl enable crio kubelet kube-proxy
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sudo systemctl enable containerd cri-containerd kubelet kube-proxy
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```
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```
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sudo systemctl start crio kubelet kube-proxy
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sudo systemctl start containerd cri-containerd kubelet kube-proxy
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```
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> Remember to run the above commands on each worker node: `worker-0`, `worker-1`, and `worker-2`.
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@@ -273,10 +226,10 @@ kubectl get nodes
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> output
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```
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NAME STATUS AGE VERSION
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worker-0 Ready 5m v1.7.4
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worker-1 Ready 3m v1.7.4
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worker-2 Ready 7s v1.7.4
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NAME STATUS ROLES AGE VERSION
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worker-0 Ready <none> 1m v1.8.0
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worker-1 Ready <none> 1m v1.8.0
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worker-2 Ready <none> 1m v1.8.0
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```
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Next: [Configuring kubectl for Remote Access](10-configuring-kubectl.md)
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