mirrors
/
kubernetes-the-hard-way
mirror of https://github.com/kelseyhightower/kubernetes-the-hard-way
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

The chapter 'Bootstrapping the etcd Cluster' is updated.

pull/443/head
Pick1a1username 2019-02-16 18:35:21 +09:00
parent 186bb92640
commit d62f3a855d
1 changed files with 10 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
docs/07-bootstrapping-etcd.md
View File

@ -4,15 +4,15 @@ 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-1`, `controller-2`, and `controller-3`. Login to each controller instance:
```
gcloud compute ssh controller-0
$ ssh -i ~/.ssh/id_rsa-k8s.pub 10.240.0.11
```
### 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.
[tmux](https://github.com/tmux/tmux/wiki) can be used to run commands on multiple virtual machines 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.
## Bootstrapping an etcd Cluster Member
@ -21,14 +21,14 @@ gcloud compute ssh controller-0
Download the official etcd release binaries from the [coreos/etcd](https://github.com/coreos/etcd) GitHub project:
```
wget -q --show-progress --https-only --timestamping \
$ wget -q --show-progress --https-only --timestamping \
"https://github.com/coreos/etcd/releases/download/v3.3.9/etcd-v3.3.9-linux-amd64.tar.gz"
```
Extract and install the `etcd` server and the `etcdctl` command line utility:
```
{
$ {
tar -xvf etcd-v3.3.9-linux-amd64.tar.gz
sudo mv etcd-v3.3.9-linux-amd64/etcd* /usr/local/bin/
}
@ -37,7 +37,7 @@ Extract and install the `etcd` server and the `etcdctl` command line utility:
### Configure the etcd Server
```
{
$ {
sudo mkdir -p /etc/etcd /var/lib/etcd
sudo cp ca.pem kubernetes-key.pem kubernetes.pem /etc/etcd/
}
@ -46,8 +46,7 @@ Extract and install the `etcd` server and the `etcdctl` command line utility:
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:
```
INTERNAL_IP=$(curl -s -H "Metadata-Flavor: Google" \
http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/ip)
$ INTERNAL_IP=$(ip a s | grep 'inet 10' | awk '{ print $2 }' | awk -F"/" '{ print $1 }')
```
Each etcd member must have a unique name within an etcd cluster. Set the etcd name to match the hostname of the current compute instance:
@ -80,7 +79,7 @@ ExecStart=/usr/local/bin/etcd \\
--listen-client-urls https://${INTERNAL_IP}:2379,https://127.0.0.1:2379 \\
--advertise-client-urls https://${INTERNAL_IP}:2379 \\
--initial-cluster-token etcd-cluster-0 \\
--initial-cluster controller-0=https://10.240.0.10:2380,controller-1=https://10.240.0.11:2380,controller-2=https://10.240.0.12:2380 \\
--initial-cluster controller-1=https://10.240.0.11:2380,controller-2=https://10.240.0.12:2380,controller-3=https://10.240.0.13:2380 \\
--initial-cluster-state new \\
--data-dir=/var/lib/etcd
Restart=on-failure
@ -101,7 +100,7 @@ EOF
}
```
> Remember to run the above commands on each controller node: `controller-0`, `controller-1`, and `controller-2`.
> Remember to run the above commands on each controller node: `controller-1`, `controller-2`, and `controller-3`.
## Verification
@ -119,7 +118,7 @@ sudo ETCDCTL_API=3 etcdctl member list \
```
3a57933972cb5131, started, controller-2, https://10.240.0.12:2380, https://10.240.0.12:2379
f98dc20bce6225a0, started, controller-0, https://10.240.0.10:2380, https://10.240.0.10:2379
f98dc20bce6225a0, started, controller-3, https://10.240.0.13:2380, https://10.240.0.13:2379
ffed16798470cab5, started, controller-1, https://10.240.0.11:2380, https://10.240.0.11:2379
```