I am trying to use include_vars based on when condition as follows:
- include_vars: clouderamanager.yml
when: '{{ inventory_hostname }}' in groups['hadoop-clouderamanager']
- include_vars: hadoop-namenode.yml
when: '{{ inventory_hostname }}' in groups['hadoop-namenode']
- include_vars: resourcemanager.yml
when: '{{ inventory_hostname }}' in groups['hadoop-resourcemanager']
- include_vars: spark-history-server.yml
when: '{{ inventory_hostname }}' in groups['spark-history-server']
I am getting ERROR! Syntax Error while loading YAML.
The error appears to have been in '~/ansible/roles/hadoop-master/tasks/main.yml': line 4, column 36, but may be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
- include_vars: clouderamanager.yml
when: '{{ inventory_hostname }}' in groups['hadoop-clouderamanager']
^ here
Changing when condition following worked
when: inventory_hostname in groups['hadoop-clouderamanager']
Add example for regular var.
- name: including vars called secrets
include_vars: "vars.yml"
- name: including vars called secrets
include_vars: "another_var_file.yml"
when: "<variable name inside vars.yml> == '<value>'"
Related
I have a two main variable with subvariables. The main variable VELABx and VELABy match the ansible_hostnames. Following an example of the variables mentioned:
VELABx
location: "text1.1"
initialism: "text1.2"
VELABy
location: "text2.1"
initialism: "text2.2"
Now I'd like to run a task which replaces a regexp with the location variable based on the current ansible_hostname. So, I tried this code, but it leads into an error.
- name: Replace location for VELABx
replace:
dest: "/path/to/file"
regexp: 'location'
replace: "{{ {{ansible_hostname}}.location }}"
remote_user: rssuser
become: no
when: ansible_hostname == "VELABx"
What am I doing wrong? How can I solve this? Can anyone bring up a solution?
Things are always easier when you manage to create a proper structure of data. For example, given the dictionaries in a file
shell> cat velab.yml
VELABx:
location: "text1.1"
initialism: "text1.2"
VELABy:
location: "text2.1"
initialism: "text2.2"
you can include the data from the file into a dictionary, e.g.
- hosts: VELABx,VELABy,VELABz
tasks:
- include_vars:
file: velab.yml
name: velab
run_once: true
- debug:
var: velab
run_once: true
gives
velab:
VELABx:
initialism: text1.2
location: text1.1
VELABy:
initialism: text2.2
location: text2.1
The data you provided in the question are not YAML dictionaries. The colon is missing behind the keys. Either fix it, if you can or parse the file. Anyway, create the dictionary whatever is the source.
Then, given the files
shell> ssh admin#10.1.0.61 cat /tmp/velab.txt
location
shell> ssh admin#10.1.0.62 cat /tmp/velab.txt
location
shell> ssh admin#10.1.0.63 cat /tmp/velab.txt
location
the task to replace the location is simple
- name: Replace location for VELAB*
replace:
dest: /tmp/velab.txt
regexp: location
replace: "{{ velab[inventory_hostname]['location'] }}"
when: velab[inventory_hostname] is defined
gives
shell> ansible-playbook playbook.yml -CD
PLAY [VELABx,VELABy,VELABz] ******************************************
...
TASK [Replace location for VELAB*] ***********************************
skipping: [VELABz]
--- before: /tmp/velab.txt
+++ after: /tmp/velab.txt
## -1 +1 ##
-location
+text1.1
changed: [VELABx]
--- before: /tmp/velab.txt
+++ after: /tmp/velab.txt
## -1 +1 ##
-location
+text2.1
changed: [VELABy]
The next option is to remove the condition and use the default value, instead of skipping the host, when the host is missing in the dictionary
- name: Replace location for VELAB*
replace:
dest: /tmp/velab.txt
regexp: location
replace: "{{ velab[inventory_hostname]['location']|
default(default_location) }}"
vars:
default_location: "text99.1"
you must use loopkup, {{}} inside other {{}} is incorrect
---
- hosts: localhost
gather_facts: false
vars:
ansible_hostname: VELABx
VELABx:
location: "text1.1"
initialism: "text1.2"
VELABy:
location: "text2.1"
initialism: "text2.2"
tasks:
- name: DEBUG
debug:
msg: "{{ lookup('vars', ansible_hostname ).location }}"
- name: Replace location for VELABx
replace:
dest: "/path/to/file"
regexp: 'location'
replace: "{{ lookup('vars', ansible_hostname ).location }}"
when: ansible_hostname == "VELABx"
My tasks:
- name: Init a new swarm with default parameters
docker_swarm:
state: present
advertise_addr: "{{ manager_ip }}:2377"
register: rezult
when: "ansible_default_ipv4.address == '{{ manager_ip }}'"
- debug:
msg: '{{ rezult.swarm_facts.JoinTokens.Worker }}'
when: "ansible_default_ipv4.address == '{{ manager_ip }}'"
Now this works fine, but if I want to run it on another server (!=) with:
- debug:
msg: '{{ rezult.swarm_facts.JoinTokens.Worker }}'
when: "ansible_default_ipv4.address != '{{ manager_ip }}'"
I get:
FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'swarm_facts'\n\nThe error appears to be in '/home/ansible/docker-ansible/docker.yml': line 42, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n - debug:\n ^ here\n"}
I do not get it. It is like ansible forgets the value of registered variable called "rezult" when running on another server even though I registered it and it should have a fixed value.
Yes, variables are always host specific, including ones declared by set_fact:; if you want that variable to appear on all your hosts, you'll have to have a special "propagation" action that reaches "over" to the one host that does have the value, and assign it to all the hosts:
- set_fact:
hello: I am a manager
when: ansible_default_ipv4.address == '{{ manager_ip }}'
- set_fact:
hello: '{{ hostvars[manager_host].hello }}'
when: hello is not defined
vars:
# you may have access to some less convoluted logic than this
# to know which inventory_hostname ran that "set_fact:"
manager_host: '{{ hostvars | dict2items
| selectattr("value.ansible_default_ipv4.address", "eq", manager_ip)
| map(attribute="key") | first }}'
I have included the below variable file in my playbook:
more vars/was_vars.yaml
::::::::::::::
10.9.12.112: "/was/IBM/WebSphere"
10.8.10.28: "/was/IBM/profiles"
10.7.120.129: "/app/tmp"
Here is my playbook:
- name: Configure nodes
hosts: dest_nodes
user: "{{ USER }}"
tasks:
- name: Construct File Path on "{{ inventory_hostname }}".
command: "touch {{ BASEPATH }}/{{ ( item | splitext)[1] }}/del.tmp"
when: "{{ Layer == 'APP' }}"
file: path="{{ "{{ inventory_hostname }}" }}/{{ App_List }}/{{ Rel_Path }}/del.tmp state=directory mode=u=rwx,g=rw,o=r"
when: "{{ Layer == 'WAS' }}"
"{{ inventory_hostname }}" gets substituted with "10.9.12.112" which should then get further substituted to "/was/IBM/WebSphere" as stated in the included vars("was_vars.yaml") file.
I'm getting the below Syntax error with my current code:
ERROR! conflicting action statements: command, file
The error appears to be in '/app/Ansible/deploy.yml': line 133, column 4, but may
be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
tasks:
- name: Construct File Path on "{{ inventory_hostname }}".
^ here
We could be wrong, but this one looks like it might be an issue with
missing quotes. Always quote template expression brackets when they
start a value. For instance:
with_items:
- {{ foo }}
Should be written as:
with_items:
- "{{ foo }}"
I'm on the latest version on ansible.
Can you please suggest?
1) The dash is missing in front of the file module.
2) Nested expansion is not possible (wrong: "{{ "{{ inventory_hostname }}" }}").
3) when: condition is expanded by default.
4) The whole string shall be quoted when the expansion of a variable is included.
5) The index of the expansion {{ ( item | splitext)[1] }} wont work.
6) It's not clear where do the variable item and the filter splitext come from.
The correct syntax might be
tasks:
- name: "Construct File Path on {{ inventory_hostname }}."
command: "touch {{ BASEPATH }}/{{ item|splitext|first }}/del.tmp"
when: Layer == 'APP'
- file:
path: "{{ inventory_hostname }}/{{ App_List }}/{{ Rel_Path }}/del.tmp"
state: directory
mode: "u=rwx,g=rw,o=r"
when: Layer == 'WAS'
(not tested)
Thank you for the inputs but what we are actually looking for is how to get the expansion to work...
I.e the inventory_hostname would be substituted with host ip say 10.9.12.112 ... But how do we code to get "/was/IBM/WebSphere" substituted matching the IP from the included variable file?
Can you try as :
"{{vars[inventory_hostname]}}"
or if you want one more level use as :
"{{vars[vars[inventory_hostname]]}}"
I am using Ansible to read in a YAML file containing a list of dictionaries. I then need to iterate through this list and call a different role depending on data within each list object. I have a solution that is working, but it seems so kludgy to me, that I wanted to find out if there was a better way.
I have defined a YAML file structure to provide the input to my playbook and I read that file into a variable with the include_vars module. I then use with_items to loop through the array one time for each role that I need to support (currently 6, but it may increase) and use a when clause to only include_role when the data in the object is correct for that role.
Code
Sample Input file:
---
objects:
- type: type1
name: obj_type1
- type: type2
name: obj_type2
- type: type3
name: obj_type3
Sample Playbook:
---
- hosts: cf-host
gather_facts: False
vars:
objects_file: ''
tasks:
- name: Read objects_file
include_vars:
file: "{{ objects_file }}"
- name: Handle type1
include_role:
name: type1_role
vars:
- type1_role_name: "{{ item.name }}"
with_items: "{{ objects }}"
when: item.type == "type1"
- name: Handle type2
include_role:
name: type2_role
vars:
- type2_role_name: "{{ item.name }}"
with_items: "{{ objects }}"
when: item.type == "type2"
- name: Handle type3
include_role:
name: type3_role
vars:
- type3_role_name: "{{ item.name }}"
with_items: "{{ objects }}"
when: item.type == "type3"
Sample Role:
---
- name: Print name
debug:
msg: "Type 1 - Name is {{ type1_role_name }}"
The other roles are the same, but have msg set to "Type X - Name is {{ typeX_role_name }}" instead.
This leads to a skipped task for every item in the list when it does not match the type corresponding to the role. It also means that I have to loop through the same list multiple times (as many as types that I need to support). As mentioned, I already need to support 6 different types and that number may grow.
This solution seems like it would scale very poorly and would have terrible performance as the list and supported types become larger and larger. Is there a better way to do what I need to do?
Better Solution
Using this answer: https://stackoverflow.com/a/53859851/9744341 as a base, I was able to come up with this as a better solution that I am happy with. Here it is in case anyone else has the same needs:
Sample Playbook:
---
- hosts: cf-host
gather_facts: False
vars:
objects_file: ''
role_name_lookup:
type1:
role_name: type1_role
tasks_from: type1_tasks
type2:
role_name: type2_role
tasks_from: type2_tasks
type3:
role_name: type3_role
tasks_from: main
tasks:
- name: Read objects_file
include_vars:
file: "{{ objects_file }}"
- name: Call roles to create infra
include_role:
name: "{{ role_name_lookup[item.type].role_name }}"
tasks_from: "{{ role_name_lookup[item.type].tasks_from }}"
vars:
inputs: "{{ item }}"
with_items: "{{ objects }}"
Sample Role:
---
- name: Print name
debug:
msg: "Type 1 - Name is {{ inputs.name }}"
The other roles are the same, but have msg set to Type X - Name is {{ inputs.name }} instead.
Would this code fit your purpose?
- name: Include roles
include_role:
name: "{{ item.type }}_role"
with_items: "{{ objects }}"
- name: Print name
debug:
msg: "{{ item.type }} - Name is {{ role_name }}"
I am new to ansible and am trying to use variables from a vars.yml file in a playbook.yml file.
vars.yml
---
- firstvar:
id: 1
name: One
- secondvar:
id: 2
name: two
playbook.yml
---
- hosts: localhost
tasks:
- name: Import vars
include_vars:
file: ./vars.yml
name: vardata
- name: Use FirstVar
iso_vlan:
vlan_id: "{{ vardata.firstvar.id }}"
name: "{{ vardata.firstvar.name }}"
state: present
- name: Use Secondvar
iso_vlan:
vlan_id: "{{ vardata.secondvar.id }}"
name: "{{ vardata.secondvar.name }}"
state: present
So you can see here I am treating the imported variable data, which is stored in vardata, as object and trying to call each of them in other tasks. I am pretty sure these imported vars at the first task are only available in that very task. How can I use that in other tasks? It would output as variables undefined for each tasks. Any input is appreciated.
Your vars.yml file isn't formatted correctly.
Try this:
---
firstvar:
id: 1
name: One
secondvar:
id: 2
name: two
I used this to test it:
---
- hosts: localhost
tasks:
- name: Import vars
include_vars:
file: ./vars.yml
name: vardata
- name: debug
debug:
msg: "{{ vardata.firstvar.name }}"
- name: more debug
debug:
msg: "{{ vardata.secondvar.id }}"
On top of the error you made when declaring the variables (syntax is very important), you can also define include_vars: ./vars.yml such that you can just call {{ firstvar.name }}, {{ firstvar.id }} immediately. Much more leaner/shorter.