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Startup etcd

pull/758/head
Tom English 2023-12-21 16:40:04 -05:00
parent ae6ac51ec0
commit a6fec4c3ca
1 changed files with 29 additions and 15 deletions
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docs/07-bootstrapping-etcd.md
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@ -4,12 +4,24 @@ Kubernetes components are stateless and store cluster state in [etcd](https://gi
## Prerequisites
The commands in this lab must be run on each controller instance: `controller-0`, `controller-1`, and `controller-2`. Login to each controller instance using the `gcloud` command. Example:
The commands in this lab must be run on each controller instance: `controller-0`, `controller-1`, and `controller-2`. Login to each controller instance:
```gcloud```
```
gcloud compute ssh controller-0
```
```az```
```
az ssh vm --name controller-0 --local-user azureuser
```
OR
```
ssh -i $HOME/.ssh/k8sthehardway azureuser@$(az vm show -d --name controller-0 --query "publicIps" -o tsv)
```
### 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.
@ -28,29 +40,33 @@ wget -q --show-progress --https-only --timestamping \
Extract and install the `etcd` server and the `etcdctl` command line utility:
```
{
tar -xvf etcd-v3.4.15-linux-amd64.tar.gz
sudo mv etcd-v3.4.15-linux-amd64/etcd* /usr/local/bin/
}
tar -xvf etcd-v3.4.15-linux-amd64.tar.gz
sudo mv etcd-v3.4.15-linux-amd64/etcd* /usr/local/bin/
```
### Configure the etcd Server
```
{
sudo mkdir -p /etc/etcd /var/lib/etcd
sudo chmod 700 /var/lib/etcd
sudo cp ca.pem kubernetes-key.pem kubernetes.pem /etc/etcd/
}
sudo mkdir -p /etc/etcd /var/lib/etcd
sudo chmod 700 /var/lib/etcd
sudo cp ca.pem kubernetes-key.pem kubernetes.pem /etc/etcd/
```
The instance internal IP address will be used to serve client requests and communicate with etcd cluster peers. Retrieve the internal IP address for the current compute instance:
```gcloud```
```
INTERNAL_IP=$(curl -s -H "Metadata-Flavor: Google" \
http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/ip)
```
```az```
```
sudo apt-get update
sudo apt-get install -y jq
INTERNAL_IP=$(curl -s -H Metadata:true --noproxy "*" "http://169.254.169.254/metadata/instance?api-version=2021-02-01" | jq -r '.network.interface[0].ipv4.ipAddress[0].privateIpAddress')
```
Each etcd member must have a unique name within an etcd cluster. Set the etcd name to match the hostname of the current compute instance:
```
@ -96,11 +112,9 @@ EOF
### Start the etcd Server
```
{
sudo systemctl daemon-reload
sudo systemctl enable etcd
sudo systemctl start etcd
}
sudo systemctl daemon-reload
sudo systemctl enable etcd
sudo systemctl start etcd
```
> Remember to run the above commands on each controller node: `controller-0`, `controller-1`, and `controller-2`.