Its my snippets for all and SREs

Ansible Snippets

---
# Ansible: Add IPs from inventory to /etc/hosts of all nodes:
- name: Add IP address of all hosts to all hosts
  lineinfile:
    dest: /etc/hosts
    regexp: '.*{{ item }}$'
    line: "{{ hostvars[item].ansible_host }} {{item}}"
    state: present
  when: hostvars[item].ansible_host is defined
  with_items: "{{ groups.all }}"

# OR
- name: Add IP address of all hosts to all hosts
  lineinfile:
    dest: /etc/hosts
    regexp: '.*{{ item }}$'
    line: "{{ hostvars[item].ansible_host }} {{item}}"
    state: present
  when: hostvars[item].ansible_host is defined
  with_items: "{{ groups.all }}"

---
# Ansible - check if disk is mounted, if not format it
- name: Create /data
  ansible.builtin.file:
    path: /data
    state: directory
    owner: root
    group: root
    mode: '0751'

- name: Create an xfs filesystem on /dev/sda5
  community.general.filesystem:
    fstype: xfs
    state: present
    dev: /dev/sda5

- name: Fetch the UUID of /dev/sda5
  command: blkid -s UUID -o value /dev/sda5
  changed_when: false
  register: blkid_out

- name: Mount /dev/sda5 by UUID
  ansible.posix.mount:
    path: /data
    src: UUID={{ blkid_out.stdout }}
    fstype: xfs
    opts: defaults
    state: mounted
---
# installs and configures an Nginx web server
- name: Configure nginx web server
  hosts: servers
  become: true
  become_user: root
  become_method: sudo
  tasks:
    - name: Install nginx
      ansible.builtin.apt:
        name: nginx
        state: latest

    - name: Comment out specific line in nginx config
      ansible.builtin.lineinfile:
        path: /etc/nginx/sites-available/default
        regexp: '^(\s*listen\s+\[::\]:80\s+default_server;)'
        line: "# {{ item }}"
      loop:
        - "listen [::]:80 default_server;"

    - name: Restart Nginx service
      ansible.builtin.service:
        name: nginx
        state: restarted

    - name: Start Nginx
      ansible.builtin.service:
        name: nginx
        state: started
        enabled: yes

    - name: Deploy web app
      ansible.builtin.copy:
        src: index.html
        dest: /var/www/html/

---
# checks disk space on remote servers and deletes specified files if the space is above a certain threshold
- name: Storage
  hosts: servers
  become: yes
  tasks:
    - name: Check /tmp freespace
      shell: sudo df | grep /dev/mapper/ubuntu--vg-ubuntu--lv | awk '{print $5}';
      register: tmp_freespace

    - name: Print the output of the shell command
      debug:
         var: tmp_freespace.stdout

    - fail:
            msg: '"{{ tmp_freespace.stdout }}" value'
      when: tmp_freespace.stdout|float is gt 50

    - name: Remove
      shell: rm /home/krunal/*;
      register: ls_output

    - name: Print the output of the shell command
      debug:
         var: ls_output.stdout
---
# Formatting and mounting persistent disks on GCE with Ansible
- name: Check if disk exists
  shell: "file -sL /dev/disk/by-id/google-"
  register: disk_exists
- name: Format disk
  shell: "mkfs.ext4 -m 0 -F -E lazy_itable_init=0,lazy_journal_init=0,discard /dev/disk/by-id/google-"
  when: "'UUID=' not in disk_exists.stdout"
- name: Create mount directory
  file:
    dest: "/mnt/disks/"
    state: directory
    owner: root
    group: root
    mode: 0755
- name: Mount drive
  mount:
    path: "/mnt/disks/"
    src: "/dev/disk/by-id/google-"
    fstype: ext4
    opts: discard,defaults
    state: mounted

---
# How to identify the hard drive with the OS installed using Ansible?
- name: display rootfs partition
  hosts: all
  become: yes
  gather_facts: yes

  tasks:
   - name: print root partition
     shell: echo "{{ ansible_cmdline.root }}" > /tmp/rootfs_part

---
- name: Create a csv file and put headers
      lineinfile:
        dest: "{{ output_path }}/{{ filename }}"
        line: >
          hostname,all_ipv4_addresses,all_ipv6_addresses,
          model,serialnum,version,
          image,iostype,filesystems,
          filesystems_info_spacetotal_kb,filesystems_info_spacefree_kb,
          memtotal_mb,memfree_mb,neighbors,
          system,api,python_version
        create: yes
        state: present
      when: inventory_hostname == groups.all[0]

#Write the device facts to CSV file
    - name: Output Information to CSV file
      lineinfile:
        dest: "{{ output_path }}/{{ filename }}"
        line: "{{ csv_data }}"
      when: ansible_net_iostype == 'IOS-XE'

    - name: Output Information to CSV file
      lineinfile:
        dest: "{{ output_path }}/{{ filename }}"
        line: "{{ csv_data }}"
      when: ansible_net_iostype == 'IOS'

#Remove any blank newlines from the file, only runs once on the first node
    - name: Remove blank lines from csv file
      lineinfile:
        path: "./{{ output_path }}/{{ filename }}"
        state: absent
        regex: '^\s*$'
      when: inventory_hostname == groups.all[0]

---
#
---
# ansible v2.11
- name: Write ios_facts into a csv file
  hosts: c29k
  connection: network_cli
  gather_facts: yes
  vars_files:
    - vault.yml

  vars:
    output_path: "./reports/"
    filename: "device_report_{{ date }}.csv"

  tasks:
  - name: CSV - Generate output filename
    set_fact: date="{{lookup('pipe','date +%Y%m%d')}}"
    run_once: true

  - name: CSV - Create file and set the header
    lineinfile:
      dest: "{{ output_path }}/{{ filename }}"
      line:
        hostname,image,iostype,model,serialnum,system,version,spacefree_kb,spacetotal_kb
      create: yes
      state: present

  - name: CSV - Get IOS devices facts
    set_fact:
      csv_tmp: >
        {{ ansible_net_hostname }},{{ ansible_net_image }},{{ ansible_net_iostype }},{{ ansible_net_model }},{{ ansible_net_serialnum }},{{ ansible_net_system }},{{ ansible_net_version }},{{ ansible_net_filesystems_info['flash:']['spacetotal_kb'] }},{{ ansible_net_filesystems_info['flash:']['spacefree_kb'] }}

  - name: CSV - Write information into .csv file
      lineinfile:
    insertafter: EOF
    dest: "{{ output_path }}/{{ filename }}"
    line: "{{ csv_tmp }}"

  - name: CSV - Blank lines removal
    lineinfile:
      path: "./{{ output_path }}/{{ filename }}"
      state: absent
      regex: '^\s*$'

---
#