72 lines
1.7 KiB
Markdown
72 lines
1.7 KiB
Markdown
|
# Multiple standalone K3s nodes
|
||
|
|
|
||
|
|
This is an example of when you might want to configure multiple standalone
|
||
|
|
k3s nodes simultaneously. For this we will assume a hypothetical situation
|
||
|
|
where we are configuring 25 Raspberry Pis to deploy to our shop floors.
|
||
|
|
|
||
|
|
Each Rasperry Pi will be configured as a standalone IoT device hosting an
|
||
|
|
application that will push data to head office.
|
||
|
|
|
||
|
|
## Architecture
|
||
|
|
|
||
|
|
```text
|
||
|
|
+-------------+
|
||
|
|
| |
|
||
|
|
| Node-01 +-+
|
||
|
|
| | |
|
||
|
|
+--+----------+ +-+
|
||
|
|
| | |
|
||
|
|
+--+---------+ +-+
|
||
|
|
| | |
|
||
|
|
+--+--------+ |
|
||
|
|
| | Node-N
|
||
|
|
+----------+
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
## Configuration
|
||
|
|
|
||
|
|
Below is our example inventory of 200 nodes (Truncated):
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
---
|
||
|
|
|
||
|
|
k3s_workers:
|
||
|
|
hosts:
|
||
|
|
kube-0:
|
||
|
|
ansible_user: ansible
|
||
|
|
ansible_host: 10.10.9.2
|
||
|
|
ansible_python_interpreter: /usr/bin/python3
|
||
|
|
kube-1:
|
||
|
|
ansible_user: ansible
|
||
|
|
ansible_host: 10.10.9.3
|
||
|
|
ansible_python_interpreter: /usr/bin/python3
|
||
|
|
kube-2:
|
||
|
|
ansible_user: ansible
|
||
|
|
ansible_host: 10.10.9.4
|
||
|
|
ansible_python_interpreter: /usr/bin/python3
|
||
|
|
|
||
|
|
# ..... SNIP .....
|
||
|
|
|
||
|
|
kube-199:
|
||
|
|
ansible_user: ansible
|
||
|
|
ansible_host: 10.10.9.201
|
||
|
|
ansible_python_interpreter: /usr/bin/python3
|
||
|
|
kube-200:
|
||
|
|
ansible_user: ansible
|
||
|
|
ansible_host: 10.10.9.202
|
||
|
|
ansible_python_interpreter: /usr/bin/python3
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
In our `group_vars/` (or as `vars:` in our playbook), we will need to set the
|
||
|
|
`k3s_build_cluster` variable to `false`. This will stop the role from
|
||
|
|
attempting to cluster all 200 nodes, instead it will install k3s across each
|
||
|
|
node as as 200 standalone servers.
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
---
|
||
|
|
|
||
|
|
k3s_build_cluster: false
|
||
|
|
```
|