I am trying to loop over a subelement variables using the a loop like with_sequence,
For the moment I have :
---
- hosts: corosync
gather_facts: no
vars:
host_list:
- node_one
- node_two
list_services:
- group: ALPHA
services:
- name: DHCP
directory: /etc/dhcp
- name: DNS
directory : /etc/dns
- group: BETA
services:
- name: SSH
directory: /etc/ssh
- name: FTP
directory: /ztc/ftp
tasks:
- name: create group-services
debug:
msg: "the service name is {{ item.0.group}}-{{ item.1.name}} , directory is {{ item.1.directory }}"
with_subelements:
- "{{ list_services }}"
- services
Since I have 2 nodes in my cluster
node_one
node_two
I want to deplucate each service like below :
{{ item.0.group}}-{{host_id}}-{{ item.1.name}}
with {{ host_id }} a list that equal ['0','1'] since I have 2 nodes
and the with_subelement function loop over the {{ host_id }} twice since we have two nodes, what gives :
ALPHA-0-DHCP
ALPHA-0-DNS
ALPHA-1-DHCP
ALPHA-1-DNS
BETA-0-SSH
BETA-0-FTP
BETA-1-SSH
BETA-1-FTP
I want to use something like with_sequence function beside with_subelement like
with_sequence: start=0, end={{ groups['host_list']|length}}
Any suggestions please
The loop declaration introduced in Ansible 2.5 makes it pretty straightforward ー you just need to combine the two patterns replacing legacy with_sequence and legacy with_subelements:
- name: create group-services
debug:
msg: "{{item.1.0.group}}-{{item.0}}-{{item.1.1.name}}"
loop: "{{ range(0, host_list|length) | product(list_services|subelements('services')) | list }}"
Related
i'am trying to start application with a ansible playbook.
the variable inst got all the required software id's:
WEB
TS3
SQL
....
how can i create a loop for all the software id's and run the same command on all of them?
---
- name: "start sw"
become: yes
command: "swstart {{ inst }}"
retries: 3
failed_when: ( instance_start.rc not in [ 0 ] )
You should first of all define your list as a variable on your playbook .
After that you can use
with_items
Like that:
---
- hosts: all
remote_user: root
vars:
softwares:
- WEB
- TS3
- SQL
vars_files:
- /softwares.yml # if you need to import data from file
tasks:
- name: display your softwares using debug module
debug:
msg: "An item: {{ item }}"
with_items: "{{ softwares }}"
I hope that this can help you to fix your issue.
Use with_items as below
---
- name: "start sw"
become: yes
command: "swstart {{ item }}"
with_items: "{{ inst }}"
Documentation:
https://docs.ansible.com/ansible/latest/user_guide/playbooks_loops.html#with-items
I'm creating a requirements.yml in an Ansible project, and I want to identify all of the modules that need to be installed from ansible-galaxy that are used by project playbooks. ansible-doc --list --playbook-dir foo seems like the right tool for the job, but it lists all locally available modules, not just the ones which are actually used in the foo directory. ansible-galaxy list doesn't account for any which are needed but not installed.
Is there a way to do this where I don't end up writing a shell script to sed|awk|grep the info I want?
The best approach I've been able to come up with so far is to ansible-playbook --syntax-check each of the playbooks. This will throw errors such as
ERROR! the role 'foo' was not found ...
ERROR! couldn't resolve module/action 'bar'. This often indicates a misspelling, missing collection, or incorrect module path.
but this is not ideal because it exits as soon as any error occurs. I have to fix each one and run the syntax check again.
FWIW, as a concept, the playbook below lists the modules used in a role
- hosts: localhost
vars:
keywords:
- always
- become
- block
- loop
- loop_control
- name
- notify
- register
- tags
- vars
- when
tasks:
- name: The variable my_role_path is mandatory
assert:
that: my_role_path|d('')|length > 0
- name: Find tasks files
find:
path: "{{ my_role_path }}/tasks"
patterns: '*.yml,*.yaml'
recurse: true
register: result
- name: Create list of tasks
set_fact:
lft: "{{ lft|d([]) + lookup('file', item)|from_yaml }}"
loop: "{{ result.files|map(attribute='path')|list }}"
- name: Get list of keys
set_fact:
lfk: "{{ lfk|d([]) + item.keys()|list }}"
loop: "{{ lft }}"
- name: Get list of keys from block/rescue/always
set_fact:
lfk: "{{ lfk|d([]) + item.keys()|list }}"
loop: "{{ lft|json_query('[].[block, rescue, always]')|flatten }}"
- name: Display list of modules
debug:
var: lfk|unique|sort|difference(keywords)
For example, analyze the role systemd
shell> ansible-playbook pb.yml -e my_role_path=roles/ansible-role-systemd
...
lfk|unique|sort|difference(keywords):
- command
- file
- include_tasks
- meta
- systemd
- template
Complete the list of the keywords.
Use the tasks below to analyze a playbook
tasks:
- name: The variable my_playbook_path is mandatory
assert:
that: my_playbook_path|d('')|length > 0
- name: Create list of tasks
set_fact:
lft: "{{ _playbook|map(attribute='tasks')|flatten }}"
vars:
_playbook: "{{ lookup('file', my_playbook_path)|from_yaml }}"
- name: Get list of keys
set_fact:
lfk: "{{ lfk|d([]) + item.keys()|list }}"
loop: "{{ lft }}"
- name: Get list of keys from block/rescue/always
set_fact:
lfk: "{{ lfk|d([]) + item.keys()|list }}"
loop: "{{ lft|json_query('[].[block, rescue, always]')|flatten }}"
- name: Display list of modules
debug:
var: lfk|unique|sort|difference(keywords)
For example, analyzing the first playbook gives
lfk|unique|sort|difference(keywords):
- assert
- debug
- find
- set_fact
Started to learn ansible yesterday, so I believe I may risk XY problem here, but still…
The main yml:
- hosts: localhost
vars_files:
[ "users.yml" ]
tasks:
- name: manage instances
#include_tasks: create_instance.yml
include_tasks: inhabit_instance.yml
with_dict: "{{users}}"
register: res
- name: print
debug: msg="{{res.results}}"
inhabit_instance.yml:
- name: Get instance info for {{ item.key }}
ec2_instance_facts:
profile: henryaws
filters:
"tag:name": "{{item.key}}"
instance-state-name: running
register: ec2
- name: print
debug:
msg: "IP: {{ec2.instances.0.public_ip_address}}"
So that's that IP that I'd like to have on the top level. Haven't found anything right away about return values of the include block…
Well, I've found some way that suits me, maybe it's even canonical?
main.yml:
- hosts: localhost
vars_files:
[ "users.yml" ]
vars:
ec_results: {}
tasks:
- name: manage instances
#include_tasks: create_instance.yml
include_tasks: inhabit_instance.yml
with_dict: "{{users}}"
register: res
inhabit_instance.yml:
- name: Get instance info for {{ item.key }}
ec2_instance_facts:
profile: henryaws
filters:
"tag:name": "{{item.key}}"
instance-state-name: running
register: ec2
- name: update
set_fact:
ec_results: "{{ ec_results|combine({ item.key: ec2.instances.0.public_ip_address }) }}"
Thanks for you answer - this helped me to find an answer to my issue when my task was called in a loop - my solution was just to use lists so for your example above, the solution would be:
The main yml:
- hosts: localhost
vars_files:
[ "users.yml" ]
vars:
ec_results: []
tasks:
- name: manage instances
#include_tasks: create_instance.yml
include_tasks: inhabit_instance.yml
with_dict: "{{users}}"
- name: print
debug: msg="{{ec_results}}"
inhabit_instance.yml:
- name: Get instance info for {{ item.key }}
ec2_instance_facts:
profile: henryaws
filters:
"tag:name": "{{item.key}}"
instance-state-name: running
register: ec2
- name: Add IP to results
set_fact:
ec_results: "{{ ec_results + [ec2.instances.0.public_ip_address] }}"
In my code, include_tasks was in a loop so then ec_results contained a list of the results from each iteration of the loop
I am trying to create a playbook to find out on which openstack server vm is running on. I have created a list of openstack servers in vars and used delegate_to with with_items to iterate through until find vm. I am using wc -l at the end of command and 1 will be success. The aim is, once os-server is found, store servername into a var so this can be used for rest of tasks in playbook. I am unable to get the os server name in a var from the list. I am not an ansible expert. Can anyone help to achieve this? Thanks
- hosts: localhost
vars:
openstack:
- reg1
- reg2
- reg3
- reg4
tasks:
- name: Command to find os server where vm exists
shell: somecommand-to-check-if-vm-exist | wc -l
delegate_to: "{{ item }}"
with_items: "{{ openstack }}"
register: found_server
retries: 1
delay: 1
until: found_server.stdout != "1"
- debug: var=found_server
- name: set fact
set_fact: os-server = "{{ item.item }}"
when: item.stdout == "1"
with_items: "{{ found_server.results }}"
register: var2
- name: debug var
debug: var=var2
- debug: var=os-server
There's no need to retry/until here and for the second loop as well.
Try this:
- hosts: localhost
vars:
openstack: [reg1, reg2, reg3, reg4]
tasks:
- name: Command to find os server where vm exists
shell: somecommand-to-check-if-vm-exist | wc -l
delegate_to: "{{ item }}"
with_items: "{{ openstack }}"
register: vm_check
- name: set fact
set_fact:
os_server: "{{ (vm_check.results | selectattr('stdout','equalto','1') | list | first).item }}"
- name: debug var
debug:
msg: "{{ os_server }}"
This will register results from every server into vm_check.results, and then just select elements with stdout set to 1, take first element of it it (I suppose you always have one server with VM), and get .item of this element which contains the item of original loop (in our case it is server's name).
Based on this question
Ansible recursive checks in playbooks
I have another one.
We need to go through this structure
Zone spec https://gist.github.com/git001/9230f041aaa34d22ec82eb17d444550c
Now I can adress the hostnames via the array index but can I also iterate over the array "hosts"?
playbook
--
- hosts: all
gather_facts: no
vars_files:
- "../doc/application-zone-spec.yml"
roles:
- { role: ingress_add, customers: "{{ application_zone_spec }}" }
role
- name: Print ingress hostnames
debug: msg="{{ item.hosts.0.hostname }} {{ item.hosts.1.hostname }}"
with_items: "{{ customers.ingress }}"
We use.
ansible-playbook --version
ansible-playbook 2.1.0.0
config file = /etc/ansible/ansible.cfg
configured module search path = Default w/o overrides
Use with_subelements:
- name: Print ingress hostnames
debug: msg="{{ item.0.type }} {{ item.1.hostname }}"
with_subelements:
- "{{ customers.ingress }}"
- "hosts"
There is quite a bit of examples for different loops in the Loops section of the documentation.