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Initial translation to OCI

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Dan Simone
2021-02-04 22:40:21 -08:00
parent ca96371e4d
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docs/09-bootstrapping-kubernetes-workers.md
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@@ -4,16 +4,18 @@ 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 our `oci-ssh` shell function. Example:
```
gcloud compute ssh worker-0
oci-ssh worker-0
```
### Running commands in parallel with tmux
[tmux](https://github.com/tmux/tmux/wiki) can be used to run commands on multiple compute instances at the same time. See the [Running commands in parallel with tmux](01-prerequisites.md#running-commands-in-parallel-with-tmux) section in the Prerequisites lab.
**Note**: please import the shell functions defined [here](02-client-tools.md#shell-functions) in each tmux window/pane, as we will make use of them.
## Provisioning a Kubernetes Worker Node
Install the OS dependencies:
@@ -21,7 +23,7 @@ Install the OS dependencies:
```
{
sudo apt-get update
sudo apt-get -y install socat conntrack ipset
sudo apt-get -y install socat conntrack ipset jq
}
```
@@ -37,7 +39,7 @@ 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:
If output is empty then swap is not enabled. If swap is enabled run the following command to disable swap immediately:
```
sudo swapoff -a
@@ -45,6 +47,17 @@ sudo swapoff -a
> To ensure swap remains off after reboot consult your Linux distro documentation.
### Set net.bridge.bridge-nf-call-iptables=1
To allow pods to access service endpoints whose backend pods run on the same node, run:
```
sudo modprobe br-netfilter
sudo sysctl -w net.bridge.bridge-nf-call-iptables=1
```
See [here](https://github.com/kelseyhightower/kubernetes-the-hard-way/issues/561) for reference.
### Download and Install Worker Binaries
```
@@ -90,8 +103,7 @@ Install the worker binaries:
Retrieve the Pod CIDR range for the current compute instance:
```
POD_CIDR=$(curl -s -H "Metadata-Flavor: Google" \
http://metadata.google.internal/computeMetadata/v1/instance/attributes/pod-cidr)
POD_CIDR=$(curl -H "Authorization: Bearer Oracle" -L http://169.254.169.254/opc/v2/instance | jq -r '.metadata["pod-cidr"]')
```
Create the `bridge` network configuration file:
@@ -224,6 +236,7 @@ Requires=containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet \\
--hostname-override=${HOSTNAME}.subnet.vcn.oraclevcn.com \\
--config=/var/lib/kubelet/kubelet-config.yaml \\
--container-runtime=remote \\
--container-runtime-endpoint=unix:///var/run/containerd/containerd.sock \\
@@ -297,8 +310,7 @@ EOF
List the registered Kubernetes nodes:
```
gcloud compute ssh controller-0 \
--command "kubectl get nodes --kubeconfig admin.kubeconfig"
oci-ssh controller-0 "kubectl get nodes --kubeconfig admin.kubeconfig"
```
> output