I have a Ansible playbook which does multiple things as below -
Download artifacts fron nexus into local server (Ansible Master).
Copy those artifacts onto multiple remote machines let's say server1/2/3 etc..
And I have used roles in my playbook and the role (repodownload) which downloads the artifacts I want to run it only once because why would i want to download the same thing again. I have tried to use run_once: true but i guess that won't work because that only works for one playbook run but my playbook is running multiple times for multiple hosts.
---
- name: Deploy my Application to tomcat nodes
hosts: '{{ target_env }}'
serial: 1
roles:
- role: repodownload
tags:
- repodownload
- role: copyrepo
tags:
- copyrepo
- role: stoptomcat
tags:
- stoptomcat
- role: deploy
tags:
- deploy
Here target_env is being passed from the command line and it's the remote host group.
Any help is appreciated.
Below is the code from main.yml from repodownload role -
- connection: local
name: Downloading files from Nexus to local server
get_url: url="{{ nexus_url }}/{{item}}/{{ myvm_release_version }}/{{item}}-{{ release_ver }}.war" dest={{ local_server_location }}
with_items:
- "{{ temps }}"
This is a really simple one that I battled with too.
Try this:
- connection: local
name: Downloading files from Nexus to local server
get_url:
url: "{{ nexus_url }}/{{item}}/{{ myvm_release_version }}/{{item}}-{{ release_ver }}.war"
dest: "{{ local_server_location }}"
with_items:
- "{{ temps }}"
run_once: true
Just something else, unrelated to your main question;
When you run a module that has really long args, like in your example above, rather break the params into their own lines nested under the module. It makes for easier reading, and it makes it easier to spot any potential typos or syntax errors early.
Okay extending from your converstation with Zeitounator. The following workaround will work without changing your vars files. Just remember that this is a workaround, might not be the most efficient way to do the job.
---
- name: Download my repo to localhost
# Executes only for first host in target_env and has visibility to group vars of target_env
hosts: '{{ target_env }}[0]'
serial: 1
roles:
- role: repodownload
tags:
- repodownload
- name: Deploy my Application to tomcat nodes
# Executes for all hosts in target_env
hosts: '{{ target_env }}'
serial: 1
roles:
- role: copyrepo
tags:
- copyrepo
- role: stoptomcat
tags:
- stoptomcat
- role: deploy
tags:
- deploy
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.
I have written lots of small yaml task files for an ansible project.
Only few of these tasks files are being reused (say 30%).
I wonder how to manage this big list of tasks, should I convert all of them to roles, and call the playbook with roles:
Playbook as below (pls ignore the syntaxe), will be clear, But I do not like to have a role for each simple task.
- name: playbook with roles for each task
hosts: all
roles:
- small_task_1
- small_task_2
- small_task_3
- small_task_4
....
....
- small_task_20
I liked the idea of putting them 2-3 roles, and call the task with include_task (or import_task), but the problem is, to each call of a task, I have to add "import_role: , name: , tasks_from" EVEN THOUGH It's from the same role!
$ ansible-galaxy role list
$ /home/user1/.ansible/roles
roles_a, (unknown version)
roles_b, (unknown version)
in roles_a and roles_b, I may have around 10 yaml tasks for each
,,,
name: playbook with 2 roles
hosts: all
- name: small task 1
include_role:
name: role_a
tasks_from: small_task_1
- name: small task 2
include_role:
name: role_a
tasks_from: small_task_2
......
......
- name: small task 9
include_role:
name: role_a
tasks_from: small_task_9
- name: small task 10
include_role:
name: role_a
tasks_from: small_task_10
,,,
Above thing is not very handy...
I would like to group the tasks in a "role" (or any other ansible thing), and call the tasks from that group... something like :
,,,
name: playbook with 2 roles
hosts: all
- name: small tasks
include_role:
name: role_a
tasks_from: small_task_1
tasks_from: small_task_2
......
......
tasks_from: small_task_9
tasks_from: small_task_10
,,,
I've tried with block , but it does not shorten the playbook.
Can anyone guide me, please?
For your final example, you can just use a loop directive on your include_role task, like this:
- hosts: localhost
gather_facts: false
tasks:
- include_role:
name: role_a
tasks_from: "{{ item }}"
loop:
- small_task_1
- small_task_2
- small_task_3
- small_task_4
I have a playbook with some roles/tasks to be executed on the remote host. There is a scenario where I want some tasks to execute locally like downloading artifacts from svn/nexus to local server.
Here is my main playbook where I am passing the target_env from the command line and dynamically loading the variables using group_vars directory
---
- name: Starting Deployment of Application to tomcat nodes
hosts: '{{ target_env }}'
become: yes
become_user: tomcat
become_method: sudo
gather_facts: yes
roles:
- role: repodownload
tags:
- repodownload
- role: stoptomcat
tags:
- stoptomcat
The first role repodownload actually download the artifacts from svn/nexus to the local server/controller. Here is the main.yml of this role -
- name: Downloading MyVM Artifacts on the local server
delegate_to: localhost
get_url: url="http://nexus.com/myrelease.war" dest=/tmp/releasename/
- name: Checkout latest application configuration templates from SVN repo to local server
delegate_to: localhost
subversion:
repo: svn://12.57.98.90/release-management/config
dest: ../templates
in_place: yes
But it's not working. Could it be because in my main yml file I am becoming the user using which I want to execute the commands on remote host.
Let me know if someone can help. It will be appreciated.
ERROR -
"changed": false,
"module_stderr": "sudo: a password is required\n",
"module_stdout": "",
"msg": "MODULE FAILURE\nSee stdout/stderr for the exact error",
"rc": 1
}
Given the scenario, you can do it multiple ways. One could be adding another play for repodownload role to your main playbook that runs only on localhost. Then remove delegate_to: localhost from the role tasks and move the variables accordingly.
---
- name: Download repo
hosts: localhost
gather_facts: yes
roles:
- role: repodownload
tags:
- repodownload
- name: Starting Deployment of Application to tomcat nodes
hosts: '{{ target_env }}'
become: yes
become_user: tomcat
become_method: sudo
gather_facts: yes
roles:
- role: stoptomcat
tags:
- stoptomcat
Another way could be removing become from play level and add to role stoptomcat. Something like below should work.
---
- name: Starting Deployment of Application to tomcat nodes
hosts: '{{ target_env }}'
gather_facts: yes
roles:
- role: repodownload
tags:
- repodownload
- role: stoptomcat
become: yes
become_user: tomcat
become_method: sudo
tags:
- stoptomcat
Haven't tested the code so apologies if any formatting issues.
I need to change the host dynamically in ansible playbook
Below is my sample playbook
---
- name: Deployment Playbook
hosts: “{{Servers}}”
tasks:
- name: deployment
shell: "deploy.sh {{DEPLOY_NAME}}"
In above play I need to change the server with respect of DEPLOY_NAME
Example
If {{DEPLOY_NAME}}=APP
THEN {{Servers}} = 172.17.65.17
If {{DEPLOY_NAME}}=SCRIPT
THEN {{Servers}} = 172.17.65.66
Previously we passed this as inventory from AWX. But now we need to handle this on playbook.
So please help me on this issue
---
- name: Deployment Playbook targetting Servers_1, will be skipped if DEPLOY_NAME is not APP
hosts: “{{Servers_1}}”
tasks:
- name: deployment
shell: "deploy.sh {{DEPLOY_NAME}}"
when: DEPLOY_NAME == 'APP'
- name: Deployment Playbook targetting Servers_1, will be skipped if DEPLOY_NAME is not SCRIPT
hosts: “{{Servers_2}}”
tasks:
- name: deployment
shell: "deploy.sh {{DEPLOY_NAME}}"
when: DEPLOY_NAME == 'SCRIPT'
I don't think you can do that. What I think it may work for you, is to do this instead:
---
- name: Deployment Playbook
hosts: localhost
tasks:
- name: deployment
shell: ssh root#{{ item.server }} deploy.sh {{ item.app }}
loop:
- { server: 'server1', app: 'app_1' }
- { server: 'server1', app: 'app_1' }
You could even improve this, by using that "inventory from awx", loading it as a "vars_files" which contains this list. So your final loop will just iterate over that list. Like this:
---
- name: Deployment Playbook
hosts: localhost
vars_files:
- your_list_file.yml
tasks:
- name: deployment
shell: ssh root#{{ item.server }} deploy.sh {{ item.app }}
loop: "{{ your_list_variable }}"
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']}}"