Run the command below under the project folder and wait for the instances to spin up
vagrant up
The project is set up to launch 3 instances: one master and two worker node. You can configure this under the NODE_COUNT variable at the top of the file. Instance information like CPU and MEM allocation can be also modified. Default is 4gb mem with 2 VCPU
Requirements
- ansible
- python2
To install ansible: https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html
After creating the instances you can run the following command to check the dynamic inventory. THis communicates with vagrant to check available hosts and split them into the master and the nodes group
> ./inventory.py --list
{"nodes": ["node1", "node2"], "vagrant": ["master", "node1", "node2"]}
To check host level information use:
> ./inventory.py --host master
"ansible_port": "2222", "ansible_host": "127.0.0.1", "ansible_user": "vagrant", "ansible_private_key_file": "/Users/mihneaspirescu/Documents/Vubiquity/kubernetes/.vagrant/machines/master/virtualbox/private_key"}%
In order to provision just do:
> ansible-playbook kubernetes.yml
and to check the steps we are doing:
> ansible-playbook kubernetes.yml --list-tasks
playbook: kubernetes.yml
play #1 (all): Initial configuration TAGS: []
tasks:
Add docker repo TAGS: []
Add kubernetes repo TAGS: []
Install packages TAGS: []
Remove swap TAGS: []
Comment out swap config TAGS: []
Put selinux in Permissive TAGS: []
Start and enable Docker TAGS: []
Add docker group TAGS: []
Add vagrant user to the docker group for easy docker access TAGS: []
Update kernel props TAGS: []
Create folder for Docker config TAGS: []
Copy docker config TAGS: []
Run and enable kubernetes TAGS: []
play #2 (master): Configure master TAGS: []
tasks:
Initiate cluster TAGS: []
Crate kube config folder TAGS: []
Copy the admin kubectl config TAGS: []
Assign ownership TAGS: []
Copy flannel config TAGS: []
Create flannel network TAGS: []
get token TAGS: []
get certificate SHA TAGS: []
save SHA and token TAGS: []
debug TAGS: []
debug TAGS: []
play #3 (nodes): Configure nodes TAGS: []
tasks:
Join master TAGS: []
When finished just connect to the master to check the nodes
vagrant ssh master
sudo su # only the root user was configured with kubectl
kubectl get nodes # you should see the node you just attached
If you make some changes to the provisioning section of the Vagrantfile just run
vagrant provision
To cleanup just run
vagrant destroy