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Update to Kubernetes 1.15.3

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Kelsey Hightower
2019-09-14 11:41:56 -07:00
parent bf2850974e
commit 5c462220b7
16 changed files with 336 additions and 233 deletions
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65
docs/09-bootstrapping-kubernetes-workers.md
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@@ -1,6 +1,6 @@
# Bootstrapping the Kubernetes Worker Nodes
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), [gVisor](https://github.com/google/gvisor), [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 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), [containerd](https://github.com/containerd/containerd), [kubelet](https://kubernetes.io/docs/admin/kubelet), and [kube-proxy](https://kubernetes.io/docs/concepts/cluster-administration/proxies).
## Prerequisites
@@ -27,18 +27,35 @@ Install the OS dependencies:
> The socat binary enables support for the `kubectl port-forward` command.
### 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.
Verify if swap is enabled:
```
sudo swapon --show
```
If output is empthy then swap is not enabled. If swap is enabled run the following command to disable swap immediately:
```
sudo swapoff -a
```
> To ensure swap remains off after reboot consult your Linux distro documentation.
### Download and Install Worker Binaries
```
wget -q --show-progress --https-only --timestamping \
https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.12.0/crictl-v1.12.0-linux-amd64.tar.gz \
https://storage.googleapis.com/kubernetes-the-hard-way/runsc-50c283b9f56bb7200938d9e207355f05f79f0d17 \
https://github.com/opencontainers/runc/releases/download/v1.0.0-rc5/runc.amd64 \
https://github.com/containernetworking/plugins/releases/download/v0.6.0/cni-plugins-amd64-v0.6.0.tgz \
https://github.com/containerd/containerd/releases/download/v1.2.0-rc.0/containerd-1.2.0-rc.0.linux-amd64.tar.gz \
https://storage.googleapis.com/kubernetes-release/release/v1.12.0/bin/linux/amd64/kubectl \
https://storage.googleapis.com/kubernetes-release/release/v1.12.0/bin/linux/amd64/kube-proxy \
https://storage.googleapis.com/kubernetes-release/release/v1.12.0/bin/linux/amd64/kubelet
https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.15.0/crictl-v1.15.0-linux-amd64.tar.gz \
https://github.com/opencontainers/runc/releases/download/v1.0.0-rc8/runc.amd64 \
https://github.com/containernetworking/plugins/releases/download/v0.8.2/cni-plugins-linux-amd64-v0.8.2.tgz \
https://github.com/containerd/containerd/releases/download/v1.2.9/containerd-1.2.9.linux-amd64.tar.gz \
https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/linux/amd64/kubectl \
https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/linux/amd64/kube-proxy \
https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/linux/amd64/kubelet
```
Create the installation directories:
@@ -57,13 +74,14 @@ Install the worker binaries:
```
{
sudo mv runsc-50c283b9f56bb7200938d9e207355f05f79f0d17 runsc
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 kubectl kube-proxy kubelet runc runsc
sudo mv kubectl kube-proxy kubelet runc runsc /usr/local/bin/
sudo tar -xvf crictl-v1.12.0-linux-amd64.tar.gz -C /usr/local/bin/
sudo tar -xvf cni-plugins-amd64-v0.6.0.tgz -C /opt/cni/bin/
sudo tar -xvf containerd-1.2.0-rc.0.linux-amd64.tar.gz -C /
chmod +x crictl kubectl kube-proxy kubelet runc
sudo mv crictl kubectl kube-proxy kubelet runc /usr/local/bin/
sudo mv containerd/bin/* /bin/
}
```
@@ -104,6 +122,7 @@ Create the `loopback` network configuration file:
cat <<EOF | sudo tee /etc/cni/net.d/99-loopback.conf
{
"cniVersion": "0.3.1",
"name": "lo",
"type": "loopback"
}
EOF
@@ -126,19 +145,9 @@ cat << EOF | sudo tee /etc/containerd/config.toml
runtime_type = "io.containerd.runtime.v1.linux"
runtime_engine = "/usr/local/bin/runc"
runtime_root = ""
[plugins.cri.containerd.untrusted_workload_runtime]
runtime_type = "io.containerd.runtime.v1.linux"
runtime_engine = "/usr/local/bin/runsc"
runtime_root = "/run/containerd/runsc"
[plugins.cri.containerd.gvisor]
runtime_type = "io.containerd.runtime.v1.linux"
runtime_engine = "/usr/local/bin/runsc"
runtime_root = "/run/containerd/runsc"
EOF
```
> Untrusted workloads will be run using the gVisor (runsc) runtime.
Create the `containerd.service` systemd unit file:
```
@@ -296,9 +305,9 @@ gcloud compute ssh controller-0 \
```
NAME STATUS ROLES AGE VERSION
worker-0 Ready <none> 35s v1.12.0
worker-1 Ready <none> 36s v1.12.0
worker-2 Ready <none> 36s v1.12.0
worker-0 Ready <none> 15s v1.15.3
worker-1 Ready <none> 15s v1.15.3
worker-2 Ready <none> 15s v1.15.3
```
Next: [Configuring kubectl for Remote Access](10-configuring-kubectl.md)