---
# Copyright 2017, Rackspace US, Inc.
#
# 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 witing, 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: Gather facts
  hosts: mnaio_hosts
  gather_facts: "{{ gather_facts | default(true) }}"
  pre_tasks:
    - name: Gather variables for each operating system
      include_vars: "{{ item }}"
      with_first_found:
        - "{{ playbook_dir }}/vars/{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yml"
        - "{{ playbook_dir }}/vars/{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
        - "{{ playbook_dir }}/vars/{{ ansible_os_family | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
        - "{{ playbook_dir }}/vars/{{ ansible_distribution | lower }}.yml"
        - "{{ playbook_dir }}/vars/{{ ansible_os_family | lower }}.yml"
      tags:
        - always

    - name: Install host distro packages
      package:
        pkg: "{{ item }}"
        state: "latest"
        update_cache: yes
        cache_valid_time: 600
      with_items: "{{ mnaio_host_distro_packages }}"

  tasks:
    - name: Ensure root has a .ssh directory
      file:
        path: /root/.ssh
        state: directory
        owner: root
        group: root
        mode: 0700

    - name: Create ssh key pair for root
      user:
        name: root
        generate_ssh_key: yes
        ssh_key_bits: 2048
        ssh_key_file: /root/.ssh/id_rsa

    - name: Get root public key
      command: cat /root/.ssh/id_rsa.pub
      register: public_key_get
      changed_when: false

    - name: Set key facts
      set_fact:
        root_public_key: "{{ public_key_get.stdout }}"

    - name: Ensure root can ssh to localhost
      authorized_key:
        user: "root"
        key: "{{ root_public_key }}"

    - name: Add sysctl options
      sysctl:
        name: net.ipv4.ip_forward
        value: 1
        sysctl_set: yes
        state: present
        reload: yes
        sysctl_file: /etc/sysctl.conf

    - name: Get gateway interface
      shell: "/sbin/ip r g 1 | awk '{print $5}'"
      register: gw_iface

    - set_fact:
        masquerade_interface: "{{ gw_iface.stdout.strip() }}"

    - name: Add IPtables rules
      iptables:
        table: "{{ item.table | default(omit) }}"
        chain: "{{ item.chain | default(omit) }}"
        in_interface: "{{ item.in_interface | default(omit) }}"
        out_interface: "{{ item.out_interface | default(omit) }}"
        source: "{{ item.source | default(omit) }}"
        destination: "{{ item.destination | default(omit) }}"
        protocol: "{{ item.protocol | default(omit) }}"
        match: "{{ item.match | default(omit) }}"
        destination_port: "{{ item.destination_port | default(omit) }}"
        jump: "{{ item.jump | default(omit) }}"
        to_ports: "{{ item.to_ports | default(omit) }}"
      with_items: "{{ mnaio_host_iptables_rules }}"

    # These rules are added manually due to bugs in the iptables module.
    - name: Add IPtables rules
      shell: |
        if ! iptables -w -t {{ item.table }} -C {{ item.rule }};then
          iptables -w -t {{ item.table }} -I {{ item.rule }}
        fi
      with_items:
        - table: 'nat'
          rule: 'POSTROUTING -s 10.0.2.0/22 ! -d 10.0.2.0/22 -j MASQUERADE'
        - table: 'mangle'
          rule: 'POSTROUTING -s 10.0.2.0/22 -o vm-br-dhcp -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill'
        - table: 'mangle'
          rule: 'POSTROUTING -s 10.0.2.0/22 -o vm-br-dhcp -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill'

    - name: Add IPtables pre-routing rules to allow external access to VMs
      shell: |
        if ! iptables -w -t nat -C PREROUTING -p tcp -d {{ ansible_default_ipv4.address }} --dport {{ item.host_port }} -j DNAT --to {{ item.vm_ip }}:{{ item.vm_port }};then
          iptables -w -t nat -I PREROUTING -p tcp -d {{ ansible_default_ipv4.address }} --dport {{ item.host_port }} -j DNAT --to {{ item.vm_ip }}:{{ item.vm_port }}
        fi
      with_items: "{{ mnaio_host_iptables_prerouting_ports }}"
      when: config_prerouting | default(false) | bool

    - name: Start netfilter persistent
      service:
        name: "{{ mnaio_host_iptables_service }}"
        state: started
        enabled: yes
      when:
        - ansible_distribution | lower == 'ubuntu'

    - name: Drop host network interfaces
      template:
        src: "pxe/{{ ansible_os_family | lower }}/mnaio-bridges.cfg.j2"
        dest: /etc/network/interfaces.d/mnaio-bridges.cfg
        mode: "0644"
        owner: root
        group: root
      register: mnaio_bridges

    - name: Ensure extra interfaces are sourced
      lineinfile:
        line: "source /etc/network/interfaces.d/*.cfg"
        dest: "/etc/network/interfaces"

    - name: Set the host intefaces up
      command: "/sbin/ifup {{ item.value.iface }}"
      with_dict: "{{ mnaio_host_networks }}"
      when: mnaio_bridges | changed

    - name: Disable virsh default network
      shell: |
        if virsh net-list |  grep -qw "default"; then
          virsh net-autostart default --disable
          virsh net-destroy default
        fi

    - name: Drop virsh network configs
      template:
        src: "kvm/libvirt-network-template.xml"
        dest: "/etc/libvirt/qemu/networks/{{ item.value.iface }}.xml"
        mode: "0644"
        owner: root
        group: root
      with_dict: "{{ mnaio_host_networks }}"

    - name: Enable new virsh network(s)
      shell: |
        if ! virsh net-list |  grep -qw "{{ item.value.iface }}"; then
          virsh net-define --file /etc/libvirt/qemu/networks/{{ item.value.iface }}.xml
          virsh net-create --file /etc/libvirt/qemu/networks/{{ item.value.iface }}.xml
          virsh net-autostart {{ item.value.iface }} || ture
        fi
      with_dict: "{{ mnaio_host_networks }}"

    - name: Locate data volume
      command: "vgdisplay vg01"
      failed_when: false
      register: data_volume

    - name: Locate data disk
      shell: >
        lsblk -brndo NAME,TYPE,FSTYPE,RO,SIZE | awk '/d[b-z]+ disk +0/{ if ($4>m){m=$4; d=$1}}; END{print d}'
      register: lsblk
      when:
        - data_volume.rc != 0
        - mnaio_data_disk is undefined

    - name: Create data disk label
      command: "parted --script /dev/{{ mnaio_data_disk | default(lsblk.stdout) }} mklabel gpt"
      when:
        - data_volume.rc != 0

    - name: Create data disk partition
      command: "parted --align optimal --script /dev/{{ mnaio_data_disk | default(lsblk.stdout) }} mkpart data1 ext4 0% 100%"
      when:
        - data_volume.rc != 0

    - name: Create data volume group
      lvg:
        vg: vg01
        pvs: "/dev/{{ mnaio_data_disk | default(lsblk.stdout) }}1"
      when:
        - data_volume.rc != 0

    - name: Locate virsh data volume
      command: "virsh pool-info vg01"
      failed_when: false
      register: virsh_data_volume

    - name: Create /etc/libvirt/storage directory
      file:
        path: "/etc/libvirt/storage/"
        state: "directory"

    - name: Create virsh data volume
      shell: |
        virsh pool-create-as vg01 logical
        virsh pool-dumpxml vg01 > /etc/libvirt/storage/vg01.xml
        virsh pool-define /etc/libvirt/storage/vg01.xml
        virsh pool-autostart vg01 || true
      when:
        - virsh_data_volume.rc != 0

    - name: Load virtio kernel modules
      shell: |
        for mod in $(find /lib/modules/$(uname -r) -type f -name 'virtio*.ko'); do
          module=$(echo $(basename $mod) | sed 's/\.ko//g')
          modprobe ${module}
          if ! grep ${module} /etc/modules; then
            echo ${module} | tee -a /etc/modules
          fi
        done

  environment: "{{ deployment_environment_variables | default({}) }}"

  tags:
    - setup-host