How to include child playbook into master playbook? The child playbook contain multiple host groups
Example: child-sample.yml
- hosts: webservers
remote_user: root
- tasks:
name: ensure apache is at the latest version
yum: name=httpd state=latest
name: write the apache config file
template: src=/srv/httpd.j2 dest=/etc/httpd.conf
- hosts: databases
remote_user: root
- tasks:
name: ensure postgresql is at the latest version
yum: name=postgresql state=latest
name: ensure that postgresql is started
service: name=postgresql state=started
How should a master-sample.yml be like to include such child playbook?
It's just as simple as:
master-sample.yaml:
- include: child-sample.yml
- include: child-sample2.yml
Related
I have this Ansible Playbook with three different plays. What I want to do is to launch the two lasts plays based on a condition. How can I do this directly at playbook level (not using when clause in each role)?
- name: Base setup
hosts: all
roles :
- apt
- pip
# !!!!! SHUT DOWN IF NOT DEBIAN DIST
- name: dbserver setup
hosts: dbserver
remote_user: "{{ user }}"
become: true
roles:
- mariadb
- name: webserver and application setup
hosts: webserver
remote_user: "{{ user }}"
become: true
roles:
- php
- users
- openssh
- sshkey
- gitclone
- symfony
You could just end the play for the hosts you do not wish to continue with, with the help of the meta task in a pre_tasks:
- name: dbserver setup
hosts: dbserver
remote_user: "{{ user }}"
become: true
pre_tasks:
- meta: end_host
when: ansible_facts.os_family != 'Debian'
roles:
- mariadb
And do the same for the web servers.
Can the playbook execution have an order of operation when there are 2 hosts? i.e. on databases it should run only if web servers are done.
Like here:
- hosts: webservers
remote_user: root
tasks:
- name: ensure apache is at the latest version
yum: name=httpd state=latest
- name: write the apache config file
template: src=/srv/httpd.j2 dest=/etc/httpd.conf
- hosts: databases
remote_user: root
tasks:
- name: ensure postgresql is at the latest version
yum: name=postgresql state=latest
- name: ensure that postgresql is started
service: name=postgresql state=started
I executed it, but it was executed on different machines at the same time.
I can’t find some way to have an order of execution.
You may take advantage from Patterns: targeting hosts and groups and Controlling playbook execution: strategies and more.
If you organise your inventory like
[website]
frontend
backend
[frontend:children]
webserver
[backend:children]
databases
[webserver]
web01.example.com
web02.example.com
[databases]
db01.example.com
db02.example.com
linear execution in groups
ansible-inventory --graph
#all:
|--#backend:
| |--#databases:
| | |--db01.example.com
| | |--db02.example.com
|--#frontend:
| |--#webserver:
| | |--web01.example.com
| | |--web02.example.com
|--#ungrouped:
|--#website:
| |--backend
| |--frontend
will run the webserver update before the database update.
- hosts: website
remote_user: root
tasks:
- name: Ensure Apache HTTPd is at the latest version
yum:
name: httpd
state: latest
when: "'webserver' in group_names"
- name: Write the Apache HTTPd config file
template:
src: /srv/httpd.j2
dest: /etc/httpd.conf
when: "'webserver' in group_names"
- name: Ensure PostgreSQL is at the latest version
yum:
name: postgresql
state: latest
when: "'databases' in group_names"
Also it is possible to apply a run to frontend, backend, webserver or databases only.
How can I add a host to a group using tower_group or tower_host modules?
The following code creates a host and a group, but they are unrelated to each other:
---
- hosts: localhost
connection: local
gather_facts: false
tasks:
- tower_inventory:
name: My Inventory
organization: Default
state: present
tower_config_file: "~/tower_cli.cfg"
- tower_host:
name: myhost
inventory: My Inventory
state: present
tower_config_file: "~/tower_cli.cfg"
- tower_group:
name: mygroup
inventory: My Inventory
state: present
tower_config_file: "~/tower_cli.cfg"
Docs mention instance_filters parameter ("Comma-separated list of filter expressions for matching hosts."), however do not provide any usage example.
Adding instance_filters: myhost to the tower_group task has no effect.
I solved it using Ansible shell module and tower-cli. I Know that create a ansible module is better than it, but to a fast solution...
- hosts: awx
vars:
tasks:
- name: Create Inventory
tower_inventory:
name: "Foo Inventory"
description: "Our Foo Cloud Servers"
organization: "Default"
state: present
- name: Create Group
tower_group:
inventory: "Foo Inventory"
name: Testes
register: fs_group
- name: Create Host
tower_host:
inventory: "Foo Inventory"
name: "host"
register: fs_host
- name: Associate host group
shell: tower-cli host associate --host "{{fs_host.id}}" --group "> {{fs_group.id}}"
This isn't natively available in the modules included with Tower, which are older and use the deprecated tower-cli package.
But it is available in the newer AWX collection, which uses the awx CLI, as long as you have a recent enough Ansible (2.9 should be fine).
In essence, install the awx collection through a requirements file, or directly like
ansible-galaxy collection install awx.awx -p ./collections
Add the awx.awx collection to your playbook
collections:
- awx.awx
and then use the hosts: option to tower_group:.
- tower_group:
name: mygroup
inventory: My Inventory
hosts:
- myhost
state: present
You can see a demo playbook here.
Be aware though that you may need preserve_existing_hosts: True if your group already contains other hosts. Unfortunately there does not seem to be an easy way to remove a single host from a group.
In terms of your example this would probably work:
---
- hosts: localhost
connection: local
gather_facts: false
collections:
- awx.awx
tasks:
- tower_inventory:
name: My Inventory
organization: Default
state: present
tower_config_file: "~/tower_cli.cfg"
- tower_host:
name: myhost
inventory: My Inventory
state: present
tower_config_file: "~/tower_cli.cfg"
- tower_group:
name: mygroup
inventory: My Inventory
state: present
tower_config_file: "~/tower_cli.cfg"
hosts:
- myhost
I am trying to write a playbook that installs Apache, but I get the below error:
The offending line appears to be:
tasks:
- name: command to install apache
^ here
Here is my YAML code:
---
- hosts: all
tasks:
- name: command to install apache
sudo: yes
yum: name=httpd state=latest
service: name=httpd state=running
What could be wrong here?
You cannot add two actions (modules) to a single task in Ansible.
You need to split yum and service into two tasks.
Also sudo declaration was deprecated long time ago and now become should be used:
---
- hosts: all
tasks:
- name: Ensure apache is installed
become: yes
yum: name=httpd state=latest
- name: Ensure httpd service is running
become: yes
service: name=httpd state=running
my inventory file's contents -
[webservers]
x.x.x.x ansible_ssh_user=ubuntu
[dbservers]
x.x.x.x ansible_ssh_user=ubuntu
in my tasks file which is in common role i.e. it will run on both hosts but I want to run a following task on host webservers not in dbservers which is defined in inventory file
- name: Install required packages
apt: name={{ item }} state=present
with_items:
- '{{ programs }}'
become: yes
tags: programs
is when module helpful or there is any other way? How could I do this ?
If you want to run your role on all hosts but only a single task limited to the webservers group, then - like you already suggested - when is your friend.
You could define a condition like:
when: inventory_hostname in groups['webservers']
Thank you, this helps me too.
hosts file:
[production]
host1.dns.name
[internal]
host2.dns.name
requirements.yml file:
- name: install the sphinx-search rpm from a remote repo on x86_64 - internal host
when: inventory_hostname in groups['internal']
yum:
name: http://sphinxsearch.com/files/sphinx-2.2.11-1.rhel7.x86_64.rpm
state: present
- name: install the sphinx-search rpm from a remote repo on i386 - Production
when: inventory_hostname in groups['production']
yum:
name: http://sphinxsearch.com/files/sphinx-2.2.11-2.rhel6.i386.rpm
state: present
An alternative to consider in some scenarios is -
delegate_to: hostname
There is also this example form the ansible docs, to loop over a group. https://docs.ansible.com/ansible/latest/user_guide/playbooks_delegation.html -
- hosts: app_servers
tasks:
- name: gather facts from db servers
setup:
delegate_to: "{{item}}"
delegate_facts: True
loop: "{{groups['dbservers']}}"