Variable interpolation is not working in some nested context.
If I'm including a vars file that has something like this:
some_current_user: "{{ ansible_ssh_user }}"
some_user_vars: [{blah: "{{ ansible_ssh_user }}"}] # oops!
The second variable is not interpolated as expected. Is there a way to fix this?
This task
- debug: var=some_current_user
- debug:
msg: "blah - {{ item.blah }}"
with_items: "{{ some_user_vars }}"
results in
TASK [debug]
*******************************************************************
ok: [my.host] => {
"some_current_user": "myuser"
}
TASK [debug] *******************************************************************
ok: [my.host] => (item={u'blah': None}) => {
"invocation": {
"module_args": {
"msg": "blah - "
},
"module_name": "debug"
},
"item": {
"blah": null
},
"msg": "blah - "
}
This appears to have been a bug and is resolved in ansible 2.1.0.0.
Related
I'm trying to get VG_Name using below code. I can see variable value using debug:var but it doesn't work inside actual task & print value as "vg": "hostvars[inventory_hostname].ansible_lvm.lvs.varlog.vg"
tasks:
- set_fact:
LV_name: "opt"
- name: Get VG Name
set_fact:
vg_command: "{{ 'hostvars[inventory_hostname].ansible_lvm.lvs.'+ LV_name +'.vg' }}"
- name: Show VG
debug:
var: "{{ vg_command }}"
- name: extend logical volume and file system
community.general.lvol:
vg: "{{ vg_command }}"
lv: "{{ LV_name }}"
size: +100%FREE
resizefs: yes
Output:
TASK [Get VG Name] *********************************************************************************************************************************************************************************
task path: /root/ansible_disk/disk_extend.yml:92
ok: [SERVER-NAME] => {
"ansible_facts": {
"vg_command": "hostvars[inventory_hostname].ansible_lvm.lvs.varlog.vg"
},
"changed": false
}
TASK [Show VG] *************************************************************************************************************************************************************************************
task path: /root/ansible_disk/disk_extend.yml:96
ok: [SERVER-NAME] => {
"hostvars[inventory_hostname].ansible_lvm.lvs.varlog.vg": "vg_00"
}
TASK [extend logical volume and file system] *******************************************************************************************************************************************************
task path: /root/ansible_disk/disk_extend.yml:109
fatal: [SERVER-NAME]: FAILED! => {
"changed": false,
"err": " Volume group name \"hostvars[inventory_hostname].ansible_lvm.lvs.varlog.vg\" has invalid characters.\n Cannot process volume group hostvars[inventory_hostname].ansible_lvm.lvs.varlog.vg\n",
"invocation": {
"module_args": {
"active": true,
"force": false,
"lv": "varlog",
"opts": null,
"pvs": null,
"resizefs": true,
"shrink": true,
"size": "+100%FREE",
"snapshot": null,
"state": "present",
"thinpool": null,
"vg": "hostvars[inventory_hostname].ansible_lvm.lvs.varlog.vg"
}
},
"msg": "Volume group hostvars[inventory_hostname].ansible_lvm.lvs.varlog.vg does not exist.",
"rc": 5
}
Tried all possible ways(lookup, vars etc) that I could think of but no luck, any help would be appreciated!
You are building your string incoorectly, leaving inventory[hostname] inside the single quotes, it will be treated as a literal; so:
vg_command: "{{ 'hostvars[inventory_hostname].ansible_lvm.lvs.'+ LV_name +'.vg' }}"
should instead be:
vg_command: "{{ hostvars[inventory_hostname].ansible_lvm.lvs[LV_name].vg }}"
I am reading a dictionary from a Kubernetes config map (cm_config below) and am using it to replace variables set in defaults/main.yml like this:
- name: 'Overwrite defaults'
set_fact: "{{ item.key }}={{ item.value }}"
with_dict: "{{ cm_config }}"
This works fine as long as the items are simple variables. But as soon as an item is another dictionary, I'd like to combine the values.
How can I integrate this into the above task? I thought about running the loop twice, with some kind of type check. Not sure how this would work. Additionally, I believe there might be a better way?
One solution below to achieve your requirement in a single task whit just a bit of jinja2 templating and a vars lookup to get existing dict content. The key is to calculate the value based on the variable type.
Note that this does not take into account the situations when the var is a list which will be replaced as all other type of values. This will not either deal with type mismatch between existing vars and config map. e.g. if your existing var is string and the corresponding one in config map a dict it will break.
The following playbook:
---
- hosts: localhost
gather_facts: false
vars:
cm_config:
label1: toto
label2:
a_value: 1
other_value: 2
label3:
a_value: 3
other_value: 4
label4: tata
label1: I am set in play
label3:
some_value: I'm a poor lonesome cowboy
tasks:
- name: show initial state
debug:
var: "{{ item.key }}"
with_dict: "{{ cm_config }}"
- name: Process values from config map
vars:
my_value: >-
{% if item.value is mapping %}
{{ lookup('vars', item.key, default={}) | combine(item.value) }}
{% else %}
{{ item.value }}
{% endif %}
set_fact:
"{{ item.key }}": "{{ my_value }}"
with_dict: "{{ cm_config }}"
- name: Show the result after processing config map
debug:
var: "{{ item.key }}"
with_dict: "{{ cm_config }}"
gives the following result:
PLAY [localhost] ****************************************************************************************************************************************************************************************************************************
TASK [show initial state] *******************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=label1) => {
"ansible_loop_var": "item",
"item": {
"key": "label1",
"value": "toto"
},
"label1": "I am set in play"
}
ok: [localhost] => (item=label2) => {
"ansible_loop_var": "item",
"item": {
"key": "label2",
"value": {
"a_value": 1,
"other_value": 2
}
},
"label2": "VARIABLE IS NOT DEFINED!"
}
ok: [localhost] => (item=label3) => {
"ansible_loop_var": "item",
"item": {
"key": "label3",
"value": {
"a_value": 3,
"other_value": 4
}
},
"label3": {
"some_value": "I'm a poor lonesome cowboy"
}
}
ok: [localhost] => (item=label4) => {
"ansible_loop_var": "item",
"item": {
"key": "label4",
"value": "tata"
},
"label4": "VARIABLE IS NOT DEFINED!"
}
TASK [Process values from config map] *******************************************************************************************************************************************************************************************************
ok: [localhost] => (item={'key': 'label1', 'value': 'toto'})
ok: [localhost] => (item={'key': 'label2', 'value': {'a_value': 1, 'other_value': 2}})
ok: [localhost] => (item={'key': 'label3', 'value': {'a_value': 3, 'other_value': 4}})
ok: [localhost] => (item={'key': 'label4', 'value': 'tata'})
TASK [Show the result after processing config map] ******************************************************************************************************************************************************************************************
ok: [localhost] => (item=label1) => {
"ansible_loop_var": "item",
"item": {
"key": "label1",
"value": "toto"
},
"label1": " toto "
}
ok: [localhost] => (item=label2) => {
"ansible_loop_var": "item",
"item": {
"key": "label2",
"value": {
"a_value": 1,
"other_value": 2
}
},
"label2": " {'a_value': 1, 'other_value': 2} "
}
ok: [localhost] => (item=label3) => {
"ansible_loop_var": "item",
"item": {
"key": "label3",
"value": {
"a_value": 3,
"other_value": 4
}
},
"label3": " {'some_value': \"I'm a poor lonesome cowboy\", 'a_value': 3, 'other_value': 4} "
}
ok: [localhost] => (item=label4) => {
"ansible_loop_var": "item",
"item": {
"key": "label4",
"value": "tata"
},
"label4": " tata "
}
PLAY RECAP **********************************************************************************************************************************************************************************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
I made a playbook that devid the hosts to windows and linux groups. this is the script (for now its just Linux and print the items that in the group):
---
- name: firstPlaybook
hosts: all
gather_facts: true
tasks:
- name: Linux Group
add_host:
name: "{{ item }}"
group: LinuxGroup
when: hostvars[item].ansible_system == 'Linux'
with_items: "{{ ansible_play_hosts }} "
run_once: yes
- name: dubug
debug:
msg: "{{ item }}"
with_items: LinuxGroup
and when I run the script with -vvv this is what I saw in the tasks itself:
TASK [Linux Group] *************************************************************
task path: /home/opc/playbooks/playbook.yml:7
skipping: [windowsserver] => (item=windowsserver) => {
"ansible_loop_var": "item",
"changed": false,
"item": "windowsserver",
"skip_reason": "Conditional result was False"
}
creating host via 'add_host': hostname=linuxserver
changed: [windowsserver] => (item=linuxserver) => {
"add_host": {
"groups": [
"LinuxGroup"
],
"host_name": "linuxserver",
"host_vars": {
"group": "LinuxGroup"
}
},
"ansible_loop_var": "item",
"changed": true,
"item": "linuxserver"
}
Perform task: TASK: dubug (N)o/(y)es/(c)ontinue: y
Perform task: TASK: dubug (N)o/(y)es/(c)ontinue: *******************************
TASK [dubug] *******************************************************************
task path: /home/opc/playbooks/playbook.yml:15
ok: [windowsserver] => (item=LinuxGroup) => {
"msg": "LinuxGroup"
}
ok: [linuxserver] => (item=LinuxGroup) => {
"msg": "LinuxGroup"
}
why its adding the windows server the the linux group even thought it suppose to be skipped (I changed the ips to windowsserver and linuxserver that I wont publish them)?
All is working as expected. Take a look at
- debug:
msg: "{{ groups.LinuxGroup }}"
I have a variable that contains a list
- debug:
var: plugin_versions
Output
ok: [localhost] => {
"plugin_versions": [
{
"name": "ace-editor",
"version": "1.1"
},
{
"name": "analysis-core",
"version": "1.95"
},
{
"name": "ant",
"version": "1.9"
}
]
Now I want to print out only the name
What Ive tried is
- debug:
var: plugin_versions.name
- debug:
var: plugin_versions[name]
But in both cases I get
TASK [plugins : debug] ***************************************************************************************************************
ok: [localhost] => {
"plugin_versions.name": "VARIABLE IS NOT DEFINED!"
}
TASK [plugins : debug] ***************************************************************************************************************
ok: [localhost] => {
"plugin_versions[name]": "VARIABLE IS NOT DEFINED!"
}
Im kinda clueless what else can I do here to print out the name only.
you could do it in a few ways. The plugin_versions is a list of dictionaries, you can print the name attribute of each dictionary using loops, here are 2 loop examples you could use:
---
- hosts: localhost
gather_facts: false
vars:
plugin_versions:
- name: ace-editor
version: '1.1'
- name: analysis-core
version: '1.95'
- name: ant
version: '1.9'
tasks:
- name: print variable - with_items
debug:
msg: "{{ item.name }}"
with_items:
- "{{ plugin_versions }}"
- name: print variable - with map filter
debug:
var: item
with_items:
- "{{ plugin_versions | map(attribute='name') | list }}"
output:
[http_offline#greenhat-29 tests]$ ansible-playbook -i hosts test.yml
PLAY [localhost] *******************************************************************************************************************************************************************************************************
TASK [print variable - with_items] *************************************************************************************************************************************************************************************
ok: [localhost] => (item={'name': 'ace-editor', 'version': '1.1'}) => {
"msg": "ace-editor"
}
ok: [localhost] => (item={'name': 'analysis-core', 'version': '1.95'}) => {
"msg": "analysis-core"
}
ok: [localhost] => (item={'name': 'ant', 'version': '1.9'}) => {
"msg": "ant"
}
TASK [print variable - with map filter] ********************************************************************************************************************************************************************************
ok: [localhost] => (item=ace-editor) => {
"item": "ace-editor"
}
ok: [localhost] => (item=analysis-core) => {
"item": "analysis-core"
}
ok: [localhost] => (item=ant) => {
"item": "ant"
}
PLAY RECAP *************************************************************************************************************************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0
[http_offline#greenhat-29 tests]$
hope it helps
Since you have a list (plugin_versions) you'll need to access each element by index:
---
- hosts: all
vars:
plugin_versions:
- { name: "ace-editor", version: "1.1"}
- { name: "analysis-core", version: "1.95"}
- { name: "ant", version: "1.9"}
tasks:
- debug: var=plugin_versions[0].name
also, if you want to loop through all the items in the list you can do something like this:
- debug: "var=item['name']"
with_items: "{{ plugin_versions }}"
You can iterate over the items of your variable with:
- debug:
var: item.name
with_items: "{{plugin_versions}}"
Say I have this dictionary
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
and for now I just want to loop over each item (key), and then over each item in the key (value). I did this
- name: Loop over the dictionary
debug: msg="Key={{ item.key }} value={{ item.value }}"
with_dict: "{{ war_files }}"
And I get this. It is of course correct, but is NOT what I want.
ok: [localhost] => (item={'value': [u'file1.war', u'file2.war'], 'key': u'server1'}) => {
"item": {
"key": "server1",
"value": [
"file1.war",
"file2.war"
]
},
"msg": "Server=server1, WAR=[u'file1.war', u'file2.war']"
}
ok: [localhost] => (item={'value': [u'file1.war', u'file2.war', u'file3.war'], 'key': u'server2'}) => {
"item": {
"key": "server2",
"value": [
"file1.war",
"file2.war",
"file3.war"
]
},
"msg": "Server=server2, WAR=[u'file1.war', u'file2.war', u'file3.war']"
}
I want to get an output that says
"msg": "Server=server1, WAR=file1.war"
"msg": "Server=server1, WAR=file2.war"
"msg": "Server=server2, WAR=file1.war"
"msg": "Server=server2, WAR=file2.war"
"msg": "Server=server2, WAR=file3.war"
IOW, how can I write a task to iterates over the dictionary so it goes through each key, and then the items within each key? In essence, I have a nested array and want to iterate over it?
Hows this
- hosts: localhost
vars:
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
tasks:
- name: Loop over subelements of the dictionary
debug:
msg: "Key={{ item.0.key }} value={{ item.1 }}"
loop: "{{ war_files | dict2items | subelements('value') }}"
dict2items, subelements filters are coming in Ansible 2.6.
FYI, if a filter for your objective doesn't exist, you can write your own in python without having to resort to jinja2 hacks. Ansible is easily extendable; filters in filter_plugins/*.py are searched by default adjacent to your plays/roles and are automatically included - see Developing Plugins for details.
Now Ansible allows this
- name: add several users
user:
name: "{{ item.name }}"
state: present
groups: "{{ item.groups }}"
with_items:
- { name: 'testuser1', groups: 'wheel' }
- { name: 'testuser2', groups: 'root' }
EDIT: At the time of writing this answer, Ansible 2.6 wasn't out. Please read the answer provided by #tmoschou, as it is much better.
Well, I couldn't find a very easy way to do it, however, with a little bit of jinja2, we can achieve something of this sort:
/tmp ❯❯❯ cat example.yml
---
- hosts: 127.0.0.1
vars:
war_files:
server1:
- file1.war
- file2.war
server2:
- file1.war
- file2.war
- file3.war
tasks:
- set_fact:
war_files_list_of_dicts: |
{% set res = [] -%}
{% for key in war_files.keys() -%}
{% for value in war_files[key] -%}
{% set ignored = res.extend([{'Server': key, 'WAR':value}]) -%}
{%- endfor %}
{%- endfor %}
{{ res }}
- name: let's debug the crap out of this
debug: var=war_files_list_of_dicts
- name: Servers and their WARs!!!
debug:
msg: "Server={{ item.Server }}, WAR={{ item.WAR }}"
with_items: "{{ war_files_list_of_dicts }}"
And, when the playbook is run:
/tmp ❯❯❯ ansible-playbook example.yml
[WARNING]: provided hosts list is empty, only localhost is available
PLAY [127.0.0.1] ***************************************************************
TASK [setup] *******************************************************************
ok: [127.0.0.1]
TASK [set_fact] ****************************************************************
ok: [127.0.0.1]
TASK [let's debug the crap out of this] ****************************************
ok: [127.0.0.1] => {
"war_files_list_of_dicts": [
{
"Server": "server1",
"WAR": "file1.war"
},
{
"Server": "server1",
"WAR": "file2.war"
},
{
"Server": "server2",
"WAR": "file1.war"
},
{
"Server": "server2",
"WAR": "file2.war"
},
{
"Server": "server2",
"WAR": "file3.war"
}
]
}
TASK [Servers and their WARs!!!] ***********************************************
ok: [127.0.0.1] => (item={'WAR': u'file1.war', 'Server': u'server1'}) => {
"item": {
"Server": "server1",
"WAR": "file1.war"
},
"msg": "Server=server1, WAR=file1.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file2.war', 'Server': u'server1'}) => {
"item": {
"Server": "server1",
"WAR": "file2.war"
},
"msg": "Server=server1, WAR=file2.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file1.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file1.war"
},
"msg": "Server=server2, WAR=file1.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file2.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file2.war"
},
"msg": "Server=server2, WAR=file2.war"
}
ok: [127.0.0.1] => (item={'WAR': u'file3.war', 'Server': u'server2'}) => {
"item": {
"Server": "server2",
"WAR": "file3.war"
},
"msg": "Server=server2, WAR=file3.war"
}
PLAY RECAP *********************************************************************
127.0.0.1 : ok=4 changed=0 unreachable=0 failed=0
Here is my preferred way to loop over dictionaries:
input_data.yml contains the following:
----
input_data:
item_1:
id: 1
info: "Info field number 1"
item_2:
id: 2
info: "Info field number 2"
I then use a data structure like the above in a play using the keys() function and iterate over the data using with_items:
---
- hosts: localhost
gather_facts: false
connection: local
tasks:
- name: Include dictionary data
include_vars:
file: data.yml
- name: Show info field from data.yml
debug:
msg: "Id: {{ input_data[item]['id'] }} - info: {{ input_data[item]['info'] }}"
with_items: "{{ input_data.keys() | list }}"
The above playbook produces the following output:
PLAY [localhost] ***********************************************************
TASK [Include dictionary data] *********************************************
ok: [localhost]
TASK [Show info field from data.yml] ***************************************
ok: [localhost] => (item=item_2) => {
"msg": "Id: 2 - info: Info field item 2"
}
ok: [localhost] => (item=item_3) => {
"msg": "Id: 3 - info: Info field item 3"
}
ok: [localhost] => (item=item_1) => {
"msg": "Id: 1 - info: Info field item 1"
}
PLAY RECAP *****************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0
dict2items
I found myself wanting to iterate over a heterogeneous set of keys and their associated values and use the key-value pair in a task. The dict2items filter is the least painful way I've found. You can find dict2items in Ansible 2.6
Example Dict
systemsetup:
remotelogin: "On"
timezone: "Europe/Oslo"
usingnetworktime: "On"
sleep: 0
computersleep: 0
displaysleep: 0
harddisksleep: 0
allowpowerbuttontosleepcomputer: "Off"
wakeonnetworkaccess: "On"
restartfreeze: "On"
restartpowerfailure: "On"
Example Task
---
- debug:
msg: "KEY: {{ item.key }}, VALUE: {{ item.value }}"
loop: "{{ systemsetup | dict2items }}"
One way of doing it that worked for me was using with_dict. Note the dict should not be named. Just the key value pairs.
- name: ssh config
lineinfile:
dest: /etc/ssh/sshd_config
regexp: '^#?\s*{{item.key}}\s'
line: '{{item.key}} {{item.value}}'
state: present
with_dict:
LoginGraceTime: "1m"
PermitRootLogin: "yes"
PubkeyAuthentication: "yes"
PasswordAuthentication: "no"
PermitEmptyPasswords: "no"
IgnoreRhosts: "yes"
Protocol: 2