check-instance.yml

# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

---
- name: Playbook main tasks
  hosts: dbasm
  gather_facts: false

  tasks:
    - name: Test connectivity to target instance using the ping module
      ping:
      register: ping_result
      ignore_unreachable: true

    - name: If reachable, ensure that the ping result was "pong"
      fail:
        msg: "The target server did not reply properly to the ping test. Details: {{ ping_result }}"
      when: ping_result is not defined or 'ping' not in ping_result or ping_result.ping != "pong"

    - name: Show the Control Node Python interpreter
      debug:
        var: ansible_playbook_python
        verbosity: 1

    - name: Show the Managed Node (target host) Python interpreter
      debug:
        var: discovered_interpreter_python
        verbosity: 1

    - name: Check that Python is installed in the target
      raw: |-
        if command -v python &> /dev/null || command -v python3 &> /dev/null; then
          exit 0
        else
          echo "A python installation was not detected"
          exit 1
        fi
      changed_when: false
      failed_when: false
      register: check_python

    - name: Install Python if required
      raw: |-
        if command -v yum &> /dev/null; then
          sudo yum install -y python3
        else
          echo "The yum utility was not detected - cannot install Python"
          exit 1
        fi
      when: check_python.rc != 0
      register: python_installation

    - name: Python installation output
      debug:
        var: python_installation
        verbosity: 1

  post_tasks:
    - name: Check environment readiness
      include_role:
        name: common
        tasks_from: readiness_checks.yml
      vars:
        control_node_checks: true
        managed_host_checks: true
        become_user_check: root
      tags: readiness_checks