I have a host group which have host variables as shown below
[test:children]
test1
test2
test3
[test:vars]
clean_images=true
I have a tasks defined in a role as shown below
- name: clean docker images
template:
dest: "/etc/systemd/system/{{ item.name }}"
with_items:
- { name: "{{ service_name }}.service" }
- name: start service
systemd:
name: "{{ service_name }}.service"
state: started
enabled: yes
when: hostvars['test'].clean_images is defined
This is a simple tasks, where I clean docker images depending on the host. I have a playbook which executes this above role in a different set of host group [test_services]. I want the task - name: start service to run if it come across any of the host groups defined in [test:children]. To check that I have added a variable clean_images=true to the test group to execute a condition check
But the when statement I have included above gives me an error
fatal: [xx.xx.xx.xx]: FAILED! => {"msg": "The conditional check 'hostvars['test'].clean_images is defined' failed. The error was: error while evaluating conditional (hostvars['test'].clean_images is defined): \"hostvars['test']\" is undefined\n\nThe error appears to have been in 'main.yml'
I have a problem in building up this conditional statement using when, any help would be great.
when: hostvars['test'].clean_images is defined
should be just:
when: clean_images is defined and clean_images
because there is no host named test, and thus hostvars of test will never exist. All hosts that belong to the test group will have clean_images defined, however
Related
---
- hosts: localhost
gather_facts: no
vars:
var_folder_path: /home/play
tasks:
- name: Include all yaml files in directories
include_vars:
dir: "{{ var_folder_path }}/vars"
extensions:
- 'yaml'
- name: "Print Variable Name"
shell: echo "{{ item }}"
loop:
- "{{ global.globalname.property.Name }}"
- "{{ S3.secret }}"
My var files under /home/play/vars
example_1.yaml
global:
globalname:
property:
cipher: DEFAULT
client:
type: dynamic
Name: test-run
example_2.yaml
gcp:
keyname: sample-run
S3:
secret: run
Resources: false
celery:
resources:
limits:
cpu: 5
When I execute the playbook I get the below error. Not sure why the values are not loading
fatal: [localhost]: FAILED! => {"msg": "'dict object' has no attribute 'globalname'"}
To debug a playbook when an error occurs, it is very often a good idea to insert a debug task.
In your case insert a debug task before the shell task and get the whole variable global output:
- debug:
var: global
As mentioned in my comment above, there are no issues with the playbooks you shared, except for the "S3" variable definition in example_2.yaml, which should be "s3" (in lower case).
One possible cause for the error you reported is that there are more than one "global" var definition in the var files at /home/play/vars, and is overriding the global var definition in example_1.yaml.
Default Ansible merge is in ASCII order, i.e., the last group loaded overwrites the previous groups. See how-variables-are-merged from Ansible official documentation for more details on how variables are merged in Ansible and update your var files accordingly.
As mentioned by user #phanaz in the other answer, its a good practice to use "debug" module for printing the vars to validate, in such scenarios.
I have a task that checks the redis service status on the host list below
- hosts: 192.168.0.1, 192.168.0.2, 192.168.0.3
tasks:
- command:
cmd: service redis-server status
register: result
- debug:
var: result
After checking I need to access hosts where service does not exist.
And they should be accessible as variable to proceed with them in the next tasks.
Can someone please help?
Similar to Ansible facts it is also possible to gather service_facts. In example
- name: Set facts SERVICE
set_fact:
SERVICE: "redis-server.service"
- name: Gathering Service Facts
service_facts:
- name: Show ansible_facts.services
debug:
msg:
- "{{ ansible_facts.services[SERVICE].status }}"
If you like to perform tasks after on a service of which you don't the status, with Conditionals you can check the state.
If the service is not installed at that time, the specific variable (key) would not be defined. You would perform Conditionals based on variables then
when: ansible_facts.services[SERVICE] is defined
when: ansible_facts.services['redis-server.service'] is defined
Also it is recommend to use the Ansible service module to perform tasks on the service
- name: Start redis-server, if not started
service:
name: redis-server
state: started
instead of using the command module.
Further services related Q&A
How to check service exists and is not installed in the server using service_facts module in an Ansible playbook?
Ansible: How to start stopped services?
Ansible: How to get disabled but running services?
How to list only the running services with ansible_facts?
Finally found the solution that perfectly matches.
- name: Check that redis service exists
systemd:
name: "redis"
register: redis_status
changed_when: redis_status.status.ActiveState == "inactive"
- set_fact:
_dict: "{{ dict(ansible_play_hosts|zip(
ansible_play_hosts|map('extract', hostvars, 'redis_status'))) }}"
run_once: true
- set_fact:
_changed: "{{ (_dict|dict2items|json_query('[?value.changed].key'))| join(',') }}"
run_once: true
I use modules from the collection netapp.ontap in my ansible playbook which works perfectly fine when run using ansible-playbook command.
However, when run from AWX, it fails to detect the collection and immediately throws an errors that it cannot detect the ansible module/collection.
I even tried to re-install the collection from the playbook itself but with no luck.
The ansible collection is confirmed to be installed as it already works fine when run outside AWX.
The host is running ansible 2.10.4.
Here is my playbook:
---
- hosts: all
gather_facts: yes
collections:
- netapp.ontap
tasks:
- name: Install Netapp Collection from Ansible Galaxy
shell: ansible-galaxy collection install netapp.ontap
- name: Run Task
import_tasks: tasks/hil.yml
Task:
- name: 'Gather SVMs'
netapp.ontap.na_ontap_info:
state: info
hostname: "{{ netapp_hostname }}"
username: "{{ netapp_username }}"
password: "{{ netapp_hv_password }}"
gather_subset:
- vserver_info
Error from AWX:
SSH password:
Vault password:
ERROR! couldn't resolve module/action 'netapp.ontap.na_ontap_info'. This often indicates a misspelling, missing collection, or incorrect module path.
The error appears to be in '/tmp/awx_421_gey54bdw/project/tasks/hil.yml': line 6, column 3, but may
be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
- name: 'Gather SVMs'
^ here
This one looks easy to fix. It seems that there is a value started
with a quote, and the YAML parser is expecting to see the line ended
with the same kind of quote. For instance:
when: "ok" in result.stdout
Could be written as:
when: '"ok" in result.stdout'
Or equivalently:
when: "'ok' in result.stdout"
Update:
I created a collections/requirements.yml file, with the below details but now AWX fails the task itself.
collections/requirements.yml
collections:
name: https://github.com/ansible-collections/netapp.git
type: git
Error:
"/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/tasks.py",
line 1279, in run self.pre_run_hook(self.instance, private_data_dir) File
"/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/tasks.py",
line 1862, in pre_run_hook sync_task.run(local_project_sync.id) File
"/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/tasks.py",
line 698, in _wrapped return f(self, *args, **kwargs) File
"/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/tasks.py",
line 1444, in run raise AwxTaskError.TaskError(self.instance, rc)
Exception: project_update 435 (failed) encountered an error (rc=2), please
see task stdout for details.
I am using ansible 2.5.4 and I need to share variables between hosts.
I tried many examples thtat I saw on-line ( share with set_fact or using a dummy host ) and it is all not working.
maybe I am doing something different,
this is my playbook:
---
- hosts: master[0]
tasks:
- name: generate kubernetes BootrapToken
command: kubeadm token generate
register: generate_token_result
- set_fact: token="{{generate_token_result}}"
- hosts: new # requires creating new group in inventory.cfg named new
tasks:
- name: include docker-host role
include_role:
name: docker-host
when: not skip_nodes_setup
- name: include kubernetes-host role
include_role:
name: kubernetes-host
when: not skip_nodes_setup
- name: include kubernetes-operator role
include_role:
name: kubernetes-operator
when: not skip_nodes_setup
- name: join node to kubernetes cluster
command: "kubeadm join --token {{ hostvars['master[0]']['token']['stdout'] }} --discovery-token-unsafe-skip-ca-verification {{ hostvars['kubernetes_machines']['kube_apiserver'] }}"
I am getting the following error:
The task includes an option with an undefined variable. The error was: "hostvars['master[0]']" is undefined
the first task is able to run on master[0] but the second task does not recognize that host.
please help.
thanks
adding the inventory.cfg:
[kubernetes_machines:vars]
kube_apiserver=10.82.72.54:6443
[kubernetes_machines:children]
masters
nodes
new
[masters]
srv12
[nodes]
srv13
[new]
prd4
If you ask for "hostvars['master[0]']", you've got the entire master[0] inside quotes so you're referring to a host with the literal name master[0]. If you mean the first member of the master hostgroup, you need a variable reference, not a string, and you'll need to use the groups variable (and you need to remember your hostgroup is named masters not master):
hostvars[groups.masters.0]
You can find relevant documentation here.
Quoting from Playbook Basics
The hosts line is a list of one or more groups or host patterns
Pattern master[0] doesn't match hostname master[0]. If the hostname is master0 then the hostvars reference should be
hostvars['master0']
It's not clear why hosts: master[0] works. It should not according to the documentation. hosts: master.0 which should be the same doesn't work.
I am deploying a CentOS machine and one among the tasks was to read a file that is rendered the Consul service which places it under /etc/sysconfig. I am trying to later read it in a variable using the lookup module but it is throwing an error below:
fatal: [ansible_vm1]: FAILED! => {"failed": true, "msg": "could not locate file in lookup: /etc/sysconfig/idb_EndPoint"}
But I am running the lookup task way below the point where the idb_EndPoint file is generated and also I looked it up manually logging in to verify the file was available.
- name: importing the file contents to variable
set_fact:
idb_endpoint: "{{ lookup('file', '/etc/sysconfig/idb_EndPoint') }}"
become: true
I also tried previlege escalations with another user become_user: deployuser along with become: true but didn't work still. Using the Ansible version 2.2.1.0.
All lookup plugins in Ansible are executed locally on the control machine.
Instead use slurp module:
- name: importing the file contents to variable
slurp:
src: /etc/sysconfig/idb_EndPoint
register: idb_endpoint_b64
become: true
- set_fact:
idb_endpoint: "{{ idb_endpoint_b64.content | b64decode }}"