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scottslowe-learning-tools/ansible/kubeadm-etcd-template
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Scott Lowe a0551b84ce
Update documentation 
Update README.md with instructions on using these files

Signed-off-by: Scott Lowe <scott.lowe@scottlowe.org>
2018-07-16 16:28:00 -06:00
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inventory Add templates and playbook 2018-07-16 16:20:59 -06:00
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1-kubeadm.conf.j2 Add templates and playbook 2018-07-16 16:20:59 -06:00
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3-kubeadm.conf.j2 Add templates and playbook 2018-07-16 16:20:59 -06:00
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README.md Update documentation 2018-07-16 16:28:00 -06:00
template.yml Add templates and playbook 2018-07-16 16:20:59 -06:00

README.md

Using Ansible to Template a Kubeadm Configuration File with etcd Support

These files provide an example of how to use Ansible's template module to create a Kubeadm 1.11 configuration file (with local etcd support) from a Jinja2 template. The template and Ansible playbook were tested using Ansible 2.5 on Fedora 27, but should work on any recent version of Ansible on any supported platform.

NOTE: At this time, the kubeadm configuration files generated by this playbook have not been verified to create a working, conformant Kubernetes cluster. Consider them to be for demonstration purposes only.

Contents

  • 1-kubeadm.conf.j2: This Jinja2 template contains the framework for a Kubeadm configuration file. This template is for the first stacked master.

  • 2-kubeadm.conf.j2: This Jinja2 template contains the framework for a Kubeadm configuration file. This template is for the second stacked master.

  • 3-kubeadm.conf.j2: This Jinja2 template contains the framework for a Kubeadm configuration file. This template is for the third stacked master.

  • ansible.cfg: This is an Ansible configuration file. You may need to edit this file based on the target systems you're using with this environment.

  • README.md: The file you're currently reading.

  • template.yml: This Ansible playbook takes a series of variables along with the *-kubeadm.conf.j2 Jinja2 templates. The output is three different kubeadm configuration files.

Instructions

These instructions assume that you have Ansible installed and functioning correctly on your system.

  1. Place the files from the ansible/kubeadm-etcd-template directory of this GitHub repository into a directory on your local system. You can clone the entire "learning-tools" repository (using git clone) or just download the specific files from the ansible/kubeadm-etcd-template folder.

  2. (Optional) Edit template.yml to specify different values for the variables defined in the playbook.

  3. This environment was tested using a CentOS-based AMI running on AWS, and as such uses the EC2 dynamic inventory module. Edit inventory/ec2.ini and inventory/hosts as needed to ensure that this environment will work for your specific inventory. You may also need to edit ansible.cfg, depending on the Linux distribution you choose to use.

  4. Run ansible-playbook template.yml to generate the three different kubeadm configuration files. They will be rendered in the same directory as kubeadm-cfg-first.yaml, kubeadm-cfg-second.yaml, and kubeadm-cfg-third.yaml, respectively.

Enjoy!

License

This content is licensed under the MIT License.