I'm looking to set a variable based on the outcome of the following evaluation: ({{ found_files.files|length > 0 }}), however, it doesn't appear to be evaluated fully. What could be the issue?
Desired outcome:found_files2: /dev/null
Outcome:
TASK [debug] ********************************************************************************************************************************************************************************
ok: [localhost] => {
"found_files2": "{'files': [], 'changed': False, 'msg': '', 'matched': 0, 'examined': 0, 'failed': False} if (False) else '/dev/null'"
}
Playbook:
---
- hosts: localhost
gather_facts: no
vars:
backup_dir: /home/user1/projects/ansible/modules/backups/router2
tasks:
- name: get files in backups/<router name>/
delegate_to: localhost
find:
paths: "{{ backup_dir }}"
register: found_files
- set_fact:
found_files2: "{{ found_files }} if ({{ found_files.files|length > 0 }}) else '/dev/null'"
- debug: var=found_files2
The correct syntax is below
- set_fact:
found_files2: "{{ found_files if (found_files.files|length > 0) else '/dev/null' }}"
The filter ternary gives the same result
- set_fact:
found_files2: "{{ (found_files.files|length > 0)|ternary(found_files, '/dev/null') }}"
Related
This is the code that I am trying to run
- name: Read and Register Contents of .bash_profile
shell: grep -E 'AB_AG_HOME|AB_AG_LOCAL_ROOT|AB_AG_LOCAL_DIR|AB_AG_CONFIG_DIR|AB_AG_LOG_DIR' /home/username/.bash_profile
register: output
- debug:
msg: "{{ output.stdout_lines }}"
- name: Append AG environment variables in .bash_profile
shell: cat /home/{{ admin_user }}/tmp_bash.profile >> /home/{{ admin_user }}/.bash_profile
when: "'AB_AG_HOME' and 'AB_AG_LOCAL_ROOT' and 'AB_AG_LOCAL_DIR' and 'AB_AG_CONFIG_DIR' and 'AB_AG_LOG_DIR' not in item"
with_items: "{{ output.stdout_lines }}"
- name: Delete the temporary tmp_bash.profile"
file:
path: /home/{{ abinitio_admin_user }}/tmp_bash.profile
state: absent
when I run this code, all the values are repeated 4 times.
Is there anything that is missing?
By looping over the stdout_lines via
with_items: "{{ output.stdout_lines }}"`
the condition
when: "'AB_AG_HOME' and 'AB_AG_LOCAL_ROOT' and 'AB_AG_LOCAL_DIR' and 'AB_AG_CONFIG_DIR' and 'AB_AG_LOG_DIR' not in item"
would only be true if all strings are in one line (item) together.
You may have a look into the following minimal example
---
- hosts: localhost
become: false
gather_facts: false
vars:
result:
stdout_lines:
- "A1"
- "A2"
- "A3"
- "A4"
- "A5"
tasks:
- name: Debug one-line conditional
debug:
msg: "Not in stdout_lines"
when: "'A1' and 'A2' and 'A3' and 'A4' and 'A5' not in result.stdout_lines"
Whereby the first given example get skipped because of the condition, the second example
- name: Debug loop conditional
debug:
msg: "Not in {{ result.stdout_lines[ansible_loop.index0] }}"
when: "'A1' and 'A2' and 'A3' and 'A4' and 'A5' not in item"
loop: "{{ result.stdout_lines }}"
loop_control:
extended: true
will result into an output of
TASK [Debug loop conditional] ******
ok: [localhost] => (item=A1) =>
msg: Not in A1
ok: [localhost] => (item=A2) =>
msg: Not in A2
ok: [localhost] => (item=A3) =>
msg: Not in A3
ok: [localhost] => (item=A4) =>
msg: Not in A4
For further debugging you could also use the assert module – Asserts given expressions are true.
I m trying to iterate over some variables in an ansible role. However, I want to ignore if the var is empty ex:ns3 from below code? I m trying when item length is greater than 0 but it seems not working? any ideas on how to do it?
---
- hosts: localhost
gather_facts: no
vars:
ns1: adm_analytics
ns2: adm_snap
ns3: ""
ns4: adm_eck
tasks:
- name: print namespace loop
with_items:
- "{{ ns1 }}"
- "{{ ns2 }}"
- "{{ ns3 }}"
- "{{ ns4 }}"
include_role:
name: verify_pod_status
vars:
NAMESPACE: "{{ item }}"
when: "{{ item | lenght > 0 }}"
You may have a look into the documentation about Conditionals.
There are some typos in your when clause.
---
- hosts: localhost
gather_facts: false
vars:
ns1: adm_analytics
ns2: adm_snap
ns3: ""
ns4: adm_eck
tasks:
- name: Print namespace loop
debug:
msg: "{{ item }}"
when: item | length > 0
with_items:
- "{{ ns1 }}"
- "{{ ns2 }}"
- "{{ ns3 }}"
- "{{ ns4 }}"
result into an output of
TASK [Print namespace loop] **************
ok: [localhost] => (item=adm_analytics) =>
msg: adm_analytics
ok: [localhost] => (item=adm_snap) =>
msg: adm_snap
ok: [localhost] => (item=adm_eck) =>
msg: adm_eck
when: condition is expanded by default. Fix the syntax
when: item|length > 0
Make your life easier and put the ns* variables into a dictionary. Then you can simply reference the values in the loop instead of listing the variables again. For example, the playbook
shell> cat playbook.yml
- hosts: localhost
gather_facts: no
vars:
ns:
ns1: adm_analytics
ns2: adm_snap
ns3: ""
ns4: adm_eck
tasks:
- name: print namespace loop
include_role:
name: verify_pod_status
loop: "{{ ns.values()|list }}"
vars:
NAMESPACE: "{{ item }}"
when: item|length > 0
and the role
shell> cat roles/verify_pod_status/tasks/main.yml
- debug:
var: NAMESPACE
give (abridged)
TASK [verify_pod_status : debug] ***********************************
skipping: [localhost] => (item=)
TASK [verify_pod_status : debug] ***********************************
ok: [localhost] =>
NAMESPACE: adm_analytics
TASK [verify_pod_status : debug] ***********************************
ok: [localhost] =>
NAMESPACE: adm_snap
TASK [verify_pod_status : debug] ***********************************
ok: [localhost] =>
NAMESPACE: adm_eck
Sorry if there are many posts about variables inside variable my use case is different.
Trying to access an element from a variable list "efs_list" based on the index-number of the current host. There are three hosts in the inventory
vars:
efs_list:
- efs1
- efs2
- efs3
sdb_index: "{{ groups['all'].index(inventory_hostname) }}"
The values should be as follows
host1- efs1
host2- efs2
host3- efs3
Tried accessing it through efs_list.{{ sdb_index }}
for - debug: var=efs_list.{{ sdb_index }} the output is as intended
ok: [10.251.0.174] => {
"efs_list.0": "efs1"
}
ok: [10.251.0.207] => {
"efs_list.1": "efs2"
}
ok: [10.251.0.151] => {
"efs_list.2": "efs3"
}
But for
- debug:
msg: "{{ efs_list.{{ sdb_index }} }}"
fatal: [10.251.0.174]: FAILED! => {"msg": "template error while templating string: expected name or number. String: {{ efs_list.{{ sdb_index }} }}"}
---
- name: SDB Snapshots Creation
hosts: all
remote_user: "centos"
become: yes
vars:
efs_list:
- efs1
- efs2
- efs3
sdb_index: "{{ groups['all'].index(inventory_hostname) }}"
tasks:
- debug: var=efs_list.{{ sdb_index }}
- debug:
msg: "{{ efs_list.{{ sdb_index }} }}"
- name: Get Filesystem ID
become: false
local_action: command aws efs describe-file-systems --creation-token "{{ efs_list.{{ sdb_index }} }}"
--region us-east-1 --query FileSystems[*].FileSystemId --output text
register: fs_id
It should attribute the element of list to current indexenter code here
extract filter will do the job. The input of the filter must be a list of indices and a container (array in this case). The tasks below
- set_fact:
sdb_index: "{{ [] + [ groups['all'].index(inventory_hostname) ] }}"
- debug:
msg: "{{ sdb_index|map('extract', efs_list)|list }}"
give
ok: [host1] => {
"msg": [
"efs1"
]
}
ok: [host2] => {
"msg": [
"efs2"
]
}
ok: [host3] => {
"msg": [
"efs3"
]
}
If the hosts are not sorted in the inventory it's necessary to sort them in the play
- set_fact:
my_hosts: "{{ groups['all']|sort }}"
- set_fact:
sdb_index: "{{ [] + [ my_hosts.index(inventory_hostname) ] }}"
- debug:
msg: "{{ sdb_index|map('extract', efs_list)|list }}"
I am fairly new to ansible and I am trying to determine how to test is a variable passed to my playbook matches against a list of substrings.
I have tried something like the following. Looping through my list of badcmds and then testing whether it is in the variable passed.
vars:
badcmds:
- clear
- no
tasks:
- name: validate input
debug:
msg: " {{ item }}"
when: item in my_command
with_items: "{{ badcmds }}"
I am getting the following error:
"msg": "The conditional check 'item in my_command' failed.
The error was: Unexpected templating type error occurred on
({% if item in my_command %} True {% else %} False {% endif %}):
coercing to Unicode: need string or buffer, bool found
Many thanks.
one problem with your playbook is that - no is automatically translated to boolean false. you should use "no" to make Ansible consider the variable as a string. without quotes:
---
- hosts: localhost
connection: local
gather_facts: false
vars:
badcmds:
- clear
- no
my_command: clear
tasks:
- name: print variable
debug:
msg: "{{ item }}"
with_items:
- "{{ badcmds }}"
output:
TASK [print variable] ***********************************************************************************************************************************************************************************************
ok: [localhost] => (item=None) => {
"msg": "clear"
}
ok: [localhost] => (item=None) => {
"msg": false
}
I guess you should enclose no in quotes, because this behavior was not your intention.
to make a loop and check if the variable matches any item from the badcmds list, you can use:
---
- hosts: localhost
connection: local
gather_facts: false
vars:
badcmds:
- "clear"
- "no"
tasks:
- name: validate input
debug:
msg: "{{ item }}"
when: item == my_command
with_items:
- "{{ badcmds }}"
hope it helps
I need to run a task only if one or more files from a pre-defined list of files are missing. I tried the following (and some variants):
touch a
cat test.yml
- hosts: localhost
vars:
filelist:
- a
- b
tasks:
- stat:
path: "{{ item }}"
with_items: "{{ filelist }}"
register: all_files
- debug:
var: all_files
- debug:
msg: "Some file(s) missing"
when: "false in all_files['results'][*]['stat']['exists']"
ansible-playbook test.yml
...
TASK [debug] ********************************************************************
ok: [localhost] => {
"all_files": {
...
"item": "a",
"stat": {
...
"exists": true,
...
"item": "b",
"stat": {
"exists": false
...
TASK [debug] ********************************************************************
fatal: [localhost]: FAILED! => {"failed": true, "msg": "The conditional check 'false in all_files['results'][*]['stat']['exists']' failed. The error was: template error while templating string: unexpected '*'. String: {% if false in all_files['results'][*]['stat']['exists'] %} True {% else %} False {% endif %}\n\nThe error appears to have been in 'test.yml': line 16, 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"}
...
What is the correct syntax to use in the 'when:' clause? Or is this the wrong way altogether?
- hosts: localhost
gather_facts: false
vars:
file_vars:
- {name: file1}
- {name: file2}
tasks:
- name: Checking existing file name
stat:
path: ./{{ item.name }}
with_items: "{{ file_vars }}"
register: check_file_name
- debug:
msg: 'file name {{item.item.name}} not exists'
with_items: "{{ check_file_name.results }}"
when: item.stat.exists == False
- name: Create file
file:
path: "./{{item.item.name}}"
state: touch
with_items: "{{ check_file_name.results }}"
when: item.stat.exists == False