freehck.k8s_app

Load application definition in kubernetes cluster

Description

This role allows to download YAML application definition and load it into kubernetes cluster.

Also it has a bunch of pre-downloaded definitions that you can use. Look available definition files under files/ directory.

Pre-downloaded definitions:

calico
kubernetes-dashboard

Role Variables

k8s_app_download_definition: flag specifying we shall download definition from url or use pre-downloaded one (default is false, that means "not download, use pre-downloaded)

k8s_app_definition_dir: directory to store definition file (default is /root)

k8s_app_definition_filename: filename to store definition, must always be set explicitly

k8s_app_definition_url: URL of definition, this parameter is mandatory when you set k8s_app_download_definition to true

Example

inventory

k8s-node-0 ansible_host=10.118.19.10 k8s_is_master=true
k8s-node-1 ansible_host=10.118.19.11
k8s-node-2 ansible_host=10.118.19.12

[k8s_cluster]
k8s-node-0
k8s-node-1
k8s-node-2

group_vars/k8s_cluster.yml

# common params
k8s_ver: "1.16.2-00"
k8s_node_ip: "{{ ansible_host }}"

# k8s_base is an implicit dependency
k8s_base_node_ip: "{{ k8s_node_ip }}"
k8s_base_ver: "{{ k8s_ver }}"

# k8s_init is an implicit dependency
k8s_init_cidr: "192.168.0.0/16"
k8s_init_node_ip: "{{ ansible_host }}"
k8s_init_node_name: "{{ inventory_hostname }}"

# this role configuration
k8s_join_is_master: "{{ k8s_is_master | default('false') }}"

playbook.yml

- hosts: k8s_cluster
  become: true
  roles:
    - role: freehck.k8s_base
    - role: freehck.k8s_init
      when: k8s_is_master | default(false)
    - role: freehck.k8s_join
    - role: freehck.k8s_app
      when: k8s_is_master | default(false)
      k8s_calico_ver: "v3.10"
      k8s_app_definition_filename: "calico-{{ k8s_calico_ver }}.yml"
      # --------------------
      # deploy from pre-downloaded service definition (uncomment it to test)
      k8s_app_download_definition: false
      # # --------------------
      # # download service definition from site (uncomment it to test)
      # k8s_app_download_definition: true
      # k8s_app_definition_url: |-
      #   https://docs.projectcalico.org/{{ k8s_calico_ver }}/manifests/calico.yaml