johnko / ansible-k8s

kubernetes deployment using ansible

ansible ploybooks to deploy kubernetes cluster

Requirements

control machine requirements:

• ansible: 2.2 or later
• python-netaddr

Deploy k8s cluster

1. Modify inventory.ini and group_vars/all.yml to suit your need

2. Deploy all components

   ansible-playbook deploy-cluster.yml
   

   or one by one

   ansible-playbook prepare.yml
   ansible-playbook deploy-etcd.yml
   ansible-playbook deploy-master.yml
   ansible-playbook deploy-node.yml
   ansible-playbook deploy-addons.yml
   

3. To add more nodes after cluster is up and running, just add new nodes to inventory.ini and run

   ansible-playbook deploy-node.yml
   

If using password instead of ssh key to access remote machines, add -k to all above commands. If the user on remote machin needs password to execute sudo command, add -K to all above commands.

Eg. ansible-playbook deploy-cluster.yml -k -K

Destroy k8s cluster

For testing purpose, we sometimes need to destroy k8s cluster and redeploy. Just run following command to destroy the entire cluster.

ansible-playbook destroy.yml

Note: This will destroy kubernetes cluster permanently, think carefully before running this command.

Vagrant

If you do not have multiple machines, you can use vagrant to bring up multiple VMs.

1. Run vagrant up to bring up 3 VMs for testing

2. Run vagrant ssh kube-master to login to kube-master

3. Install ansible and python-netaddr on kube-master(control machine)

   sudo add-apt-repository ppa:ansible/ansible
   sudo apt-get update && sudo apt-get install -y ansible python-netaddr
   

4. Deploy kubernetes

   cd /vagrant
   ansible-playbook deploy-cluster.yml
   

Limitations

• No support for HA masters
• No support for HA etcd clusters
• Only support calico network plugin
• Only ubuntu-14.04 tested