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Mosaico 3

Scripts to install a kubernetes cluster in Vagrant

You need a bash enviroment with SSH, either a Linux Distro, a Mac OSX or Windows 10 Bash (see below for Windows)

You need also VirtualBox, Vagrant and Ansible installed in your environment.

Kubernetes On VirtualBox in Windows

Setup on Linux/OSX

The kit is for Unix, so works out of the box in Linux and OSX, as follows.

Create VMs in Virtualbox with vagrant

  • cd servers/vbox
  • vagrant up
  • vagrant ssh-config >>~/.ssh/config

Edit your hosts file

Run sudo vi /etc/hosts and add the following line:

127.0.0.1 master node1 node2 node3

Provision Kubernetes with ansible

  • pip install ansible
  • cd ../../kubernetes
  • ansible-playbook site.yml

That is. Once done, vagrant ssh master and start playing with Kubernetes

Setup on windows

The kit work also on Windows 10. However since Windows is not a native Unix, the procedure is slightly more complex and involves the use of two shells, the native PowerShell and Windows Bash.

The main problem is on Windows, ansible is not available as a Windows application. You need to install Windows 10 Bash to use Ansible. On the other side, both VirtualBox and Vagrant are native Windows applications and does not work with Windows Bash.

So the procedure on Windows 10 is the following.

Create VMs with Vagrant in Windows

First of course download Mosaico. Then install VirtualBox and Vagrant for Windows, and open a Windows shell (CMD or PowerShell).

  • cd servers\vbox
  • vagrant up
  • vagrant ssh-config >config

Note we started the VM with Vagrant for Windows and we saved the configuration in a local file.

Add an entry in Windows hosts file

You need to launch notepad as an administrator. Search notepad then right-click and run it as an Administrator. Then open the file c:\Windows\System32\Drivers\etc\hosts and add the following line:

127.0.0.1 master node1 node2 node3

Remember to save it.

Provision Kubernetes with Windows bash

Now, ensure you have Windows Bash. Go in the Windows Store and install Ubuntu. Finally, open Windows bash, and do the following steps.

First install python, pip and ansible:

  • sudo apt-get update
  • sudo apt-get install python-pip
  • sudo pip install ansible

Second, create a proper configuration file for ssh (note we have to replace C: with /mnt/c)

  • mkdir $HOME/.ssh
  • cd Mosaico3/servers/vbox
  • sed -e 's!C:!/mnt/c!g' <config >>$HOME/.ssh/config

Finally you can provision with ansible Kubernetes:

  • cd ../../kubernetes
  • ansible-playbook sites.yml

Access the cluster with kubectl

Vagrant exposes port 6443 and the certificate can be used with the master hostname (by default master).

If you have installed kubectl you can retrieve the configuration with:

ssh master sudo cat /etc/kubernetes/admin.conf  | sed -e 's/10.0.0.10/master/' >~/.kube/config

After this command check you can access the cluster with kubectl get nodes. You should get:

$ kubectl get nodes
NAME      STATUS    AGE       VERSION
master    Ready     10m       v1.10.3
node1     Ready     9m        v1.10.3
node2     Ready     9m        v1.10.3
node3     Ready     9m        v1.10.3