Merge pull request #1306 from rsmitty/scale-up

add scale.yml to do minimum needed for a node bootstrap
This commit is contained in:
Spencer Smith 2017-05-25 18:51:09 -04:00 committed by GitHub
commit 11c774b04f
2 changed files with 46 additions and 0 deletions

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@ -55,3 +55,15 @@ ansible-playbook -i my_inventory/inventory.cfg cluster.yml -b -v \
```
See more details in the [ansible guide](ansible.md).
Adding nodes
--------------------------
You may want to add worker nodes to your existing cluster. This can be done by re-running the `cluster.yml` playbook, or you can target the bare minimum needed to get kubelet installed on the worker and talking to your masters. This is especially helpful when doing something like autoscaling your clusters.
- Add the new worker node to your inventory under kube-node (or utilize a [dynamic inventory](https://docs.ansible.com/ansible/intro_dynamic_inventory.html)).
- Run the ansible-playbook command, substituting `scale.yml` for `cluster.yml`:
```
ansible-playbook -i my_inventory/inventory.cfg scale.yml -b -v \
--private-key=~/.ssh/private_key
```

34
scale.yml Normal file
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@ -0,0 +1,34 @@
---
##Bootstrap any new workers
- hosts: kube-node
any_errors_fatal: "{{ any_errors_fatal | default(true) }}"
gather_facts: false
vars:
ansible_ssh_pipelining: false
roles:
- { role: kargo-defaults}
- { role: bootstrap-os, tags: bootstrap-os}
##We still have to gather facts about our masters and etcd nodes
- hosts: k8s-cluster:etcd:calico-rr
any_errors_fatal: "{{ any_errors_fatal | default(true) }}"
vars:
ansible_ssh_pipelining: true
gather_facts: true
##Target only workers to get kubelet installed and checking in on any new nodes
- hosts: kube-node
any_errors_fatal: "{{ any_errors_fatal | default(true) }}"
roles:
- { role: kargo-defaults}
- { role: kernel-upgrade, tags: kernel-upgrade, when: kernel_upgrade is defined and kernel_upgrade }
- { role: kubernetes/preinstall, tags: preinstall }
- { role: docker, tags: docker }
- role: rkt
tags: rkt
when: "'rkt' in [etcd_deployment_type, kubelet_deployment_type, vault_deployment_type]"
- { role: etcd, tags: etcd, etcd_cluster_setup: false }
- { role: vault, tags: vault, when: "cert_management == 'vault'"}
- { role: kubernetes/node, tags: node }
- { role: network_plugin, tags: network }