Initial commit

.gitignore

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+.git
+ansible/tmp
+.vagrant
+*.retry

.ssh/config

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+Host *
+  ServerAliveInterval 120
+  StrictHostKeyChecking no
+
+Include ~/.ssh/config.d/kvm-host
+
+Host k8s-master
+  Hostname 192.168.122.10
+  IdentityFile ~/.ssh/id_rsa
+  User ubuntu
+  ProxyJump kvm-host
+
+Host k8s-worker-01
+  Hostname 192.168.122.11
+  IdentityFile ~/.ssh/id_rsa
+  User ubuntu
+  ProxyJump kvm-host
+
+Host k8s-worker-02
+  Hostname 192.168.122.12
+  IdentityFile ~/.ssh/id_rsa
+  User ubuntu
+  ProxyJump kvm-host

LICENSE

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+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
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+
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+permanent authorization for you to choose that version for the
+Library.

README.md

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+KVM & Kubernetes
+==
+Ansible playbooks to install and maintain KVM & Kubernetes. This is useful to create you own Kubernetes cluster within a dedicated single server or local computer running on CentOS 8. The Kubernetes nodes are using Ubuntu Xenial (16.04) Cloud Server.
+
+This project has been created to satisfy customized requirements to use Kubernetes in a dedicated single server, however you can modify it and contribute back as it has been released as [LGPLv3](LICENSE).
+
+Includes two playbooks:
+
+- `kvm.yml`: Provides the following tagged actions:
+  - `install`: Installs libvirt and its required libraries and a basic structure to for images and iso files (`/kvm/{iso|img}`).
+  - `download`: Download `qcow2` images used to allocate the Kubernetes nodes.
+  - `config`: Configure images to create the Kubernetes nodes, you can modify their settings (memory, hard disks, vCPUs) in `ansible/playbooks/roles/virt/defaults/main.yml`.
+  - `create`: Execute the creation of images and VMs.
+  - `reload`: Reloads VMs to apply custome IPs & network settings.
+
+  **SSH KVM host note**: In order to access your KVM host you must setup your SSH config file, the current `.ssh/config` includes a file located in `~/.ssh/config.d/kvm-host`. The suggested configuration is:
+  ```bash
+  Host kvm-host
+  Hostname <your-kvm-host-ip-address>
+  User centos
+  IdentityFile ~/.ssh/id_rsa
+  ```
+  **SSH public key note**: In order to access the nodes, it is necessary to copy your SSH public key, to do that please set a local environment variable named `PUB_KEY` with you public key, you can do that by executing the following command:
+  ```bash
+  export PUB_KEY=$(cat ~/.ssh/id_rsa.pub)
+  ```
+  If you SSH public key is located somewhere else or has a different name please use such location.
+```bash
+ansible-playbook -i inventories/ovh playbooks/kvm.yml -t install,download,config,create,reload -e "pub_key='$PUB_KEY'"
+```
+
+- `k8s.yml`: Provides the following tagged actions:
+  - `install`: Installs Kubernetes and its dependencies.
+  - `init`: Initializes the Kubernetes cluster.
+  - `join`: Executes the kubeadm on each node so they can join the cluster.
+
+```bash
+ansible-playbook -i inventories/ovh playbooks/k8s.yml -t install,init,join
+```
+---
+Feel yourself free to contact the author if you have any suggestions to improve this project.

ansible/ansible.cfg

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+[defaults]
+timeout = 30
+force_color = 1
+local_tmp = ./tmp
+log_path = ./tmp/ansible.log
+display_skipped_hosts = false
+retry_files_enabled = false
+
+[ssh_connection]
+ssh_args = -F ../.ssh/config
+pipelining = true
+host_key_checking = false

ansible/inventories/kvm-host/group_vars/all.yml

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+k8s_subnet: "192.168.0.0/16"
+k8s_master_ip: "192.168.122.10"
+k8s_worker_01_ip: "192.168.122.11"
+k8s_worker_02_ip: "192.168.122.12"

ansible/inventories/kvm-host/hosts

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+[main_host]
+kvm-host
+
+[k8s_masters]
+k8s-master
+
+[k8s_workers]
+k8s-worker-01
+k8s-worker-02
+
+[k8s_nodes:children]
+k8s_masters
+k8s_workers

ansible/playbooks/k8s.yml

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+---
+- hosts: k8s_nodes
+  roles:
+    - role: k8s

ansible/playbooks/kvm.yml

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+---
+- hosts: main_host
+  roles:
+    - role: virt

ansible/playbooks/roles/k8s/tasks/config.yml

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+---
+- name: shell | config - Initialize kubernetes api
+  shell: kubeadm init --apiserver-advertise-address="{{ k8s_master_ip }}" --pod-network-cidr="{{ k8s_subnet }}"
+  become: true
+  when: ansible_host in groups['k8s_masters']
+  tags: init
+
+- name: file | config - Create local .kube directory
+  file:
+    path: ~/.kube
+    state: directory
+  become_user: ubuntu
+  when: ansible_host in groups['k8s_masters']
+  tags: init
+
+- name: copy | config - Copy kubernetes config to local
+  copy:
+    src: /etc/kubernetes/admin.conf
+    dest: /home/ubuntu/.kube/config
+    remote_src: yes
+    owner: ubuntu
+    group: ubuntu
+  become: yes
+  when: ansible_host in groups['k8s_masters']
+  tags: init
+
+- name: shell | config - Apply calico network
+  shell: kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
+  environment:
+    KUBECONFIG: /home/ubuntu/.kube/config
+  become_user: ubuntu
+  when: ansible_host in groups['k8s_masters']
+  tags: init
+
+- name: shell | config - Generate join command
+  shell: kubeadm token create --print-join-command 2>/dev/null
+  become: true
+  register: join_command
+  when: ansible_host in groups['k8s_masters']
+  tags: join
+
+- name: debug | config - Print out join command
+  debug:
+    msg: "{{ join_command.stdout_lines[0] }}"
+  when: ansible_host in groups['k8s_masters']
+  tags: join
+
+- name: local_action | config - Copy join command to local file
+  local_action: copy content="{{ join_command.stdout_lines[0] }}" dest="./join-command"
+  when: ansible_host not in groups['k8s_workers']
+  ignore_errors: yes
+  any_errors_fatal: false
+  tags: join
+
+- name: copy | config - Copy the join command to the worker nodes
+  copy: src=join-command dest=/tmp/join-command.sh mode=0777
+  become: true
+  when: ansible_host in groups['k8s_workers']
+  tags: join
+
+- name: local_action | config - Remove local join command file
+  local_action:
+    module: file
+    path: "./join-command"
+    state: absent
+  when: ansible_host not in groups['k8s_workers']
+  tags: join
+
+- name: command | config - Join the worker node to cluster
+  command: sh /tmp/join-command.sh
+  become: true
+  when: ansible_host in groups['k8s_workers']
+  tags: join