Vagrant
Vagrant is an open-source software to automate the provision of virtual machine. For this playground, it is used to rapidly setup a Ubuntu guest system within VirtualBox.
Commands
This sections covers the most important commands to use vagrant for more information
use vagrant --help or man vagrant
# starts and provisions the vagrant environment
vagrant up
# stops the vagrant environment
vagrant halt
# login via ssh
vagrant ssh
# provisions to a running vagrant machine; useful by a change of the ansible scripts
vagrant provision
# stops and deletes the vagrant machine
vagrant destroy
Ansible
Vagrant offers integration for various code as infrastructure tools, among other for Ansible. In order to avoid a Ansible installation on the host system, the Vagrant ansible_local provisioner is used. Before executing the Ansible playbook, Vagrant installs Ansible on the guest system. As no Ansible installation is required on the host system, a the portability is improved, due to a reduction of dependencies.
Ansible Provisioning
- The ansible project is in the folder *kubernetes-setup
- Vagrant use the Playbook in the master-playbook.yml file
- The role defaultSetup, installs some useful linux packages like htop or mc
- The role microK8s, installation of Kubernetes itself
- The role k8sDefaultAddons, enabling the microK8 addons DNS, Ingress and Storage by default. This should reduce re-occurring and error prone configuration tasks. By adding the addon name in the file kubernetes-setup/k8sDefaultAddons/tasks/enableK8sDefaultAddons.yml, more addons can be enabled by default.