The below code is attempting to find all the keys associated with the value HWIC-8A. I have tried a few different variations & I can't get the key to print, without doing something really long winded. As i'll be repeating this code with different values, i don't want to search each key/value pair individually within that list.
MODULES:
Slot_0_SubSlot_0: HWIC-8A
Slot_0_SubSlot_1: EHWIC-VA-DSL-M
Slot_0_SubSlot_3: HWIC-8A
- name: Apply HWIC-8A Build
debug:
msg: "{{ item.key }}"
with_items: "{{ MODULES }}"
when: "{{ item.value }} == HWIC-8A"
Maybe that's something for you:
---
- hosts: localhost
vars:
MODULES:
Slot_0_SubSlot_0: HWIC-8A
Slot_0_SubSlot_1: EHWIC-VA-DSL-M
Slot_0_SubSlot_3: HWIC-8A
tasks:
- debug: var=MODULES
- debug: msg="{{ MODULES | dict2items }}"
- debug: msg="{{ MODULES | dict2items | selectattr('value','match','HWIC-8A') | map(attribute='key')| list }}"
Then if you would like to have multiple matches, you could solve it with an MATCH list:
---
- hosts: localhost
vars:
MODULES:
Slot_0_SubSlot_0: HWIC-8A
Slot_0_SubSlot_1: EHWIC-VA-DSL-M
Slot_0_SubSlot_3: HWIC-8A
Slot_1_SubSlot_3: HWIC-8C
Slot_1_SubSlot_2: HWIC-8C
MATCH:
- HWIC-8A
- HWIC-8C
tasks:
- debug:
msg: "{{ MODULES | dict2items | selectattr('value','match',item) | map(attribute='key')| list }}"
with_items: "{{ MATCH }}"
Output:
TASK [debug] ***********************************************************************************************************************************************************************************
Thursday 27 August 2020 15:08:10 +0200 (0:00:00.042) 0:00:02.037 *******
ok: [localhost] => (item=HWIC-8A) => {
"msg": [
"Slot_0_SubSlot_0",
"Slot_0_SubSlot_3"
]
}
ok: [localhost] => (item=HWIC-8C) => {
"msg": [
"Slot_1_SubSlot_3",
"Slot_1_SubSlot_2"
]
}
I would use use jinja templates to do it. Something like this:
- name: Apply HWIC-8A Build
debug:
msg: '{% for m in MODULES %}{% if MODULES[m] == "HWIC-8A" %}{{ m }} {% endif %}{% endfor %}'
Which will give you this:
ok: [localhost] => {
"msg": "Slot_0_SubSlot_0 Slot_0_SubSlot_3 "
}
There is probably a fancy way using filters as well.
Related
applications:
appA:
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appA'
appB:
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appB'
- ansible.builtin.set_fact:
clusters: "{{ clusters + [ item ] }}"
when: applications.{{ item }}.someDB.enable
loop:
- appA
- appB
- ansible.builtin.shell: |
pg_createcluster \
-d {{ aplications.item.someDB.datadir }}
when: item == 'appA'
loop: "{{ clusters }}"
Is there a simple way to make ansible do substitutions inside a var ? Like some precedence operand.
In the loop: item == appA
so, {{ aplications.item.someDB.datadir }} is like this {{ aplications.appA.someDB.datadir }}, and autmatocally is its content is: '/var/lib/postgresql/11/appA' and so on.
Probably I'm using the wrong approach, but seems reasonable to me do that.
Thank's for anyu help.
The applications variable can be flattened, so it will be easier to set the conditions for the task
applications:
- name: appA
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appA'
- name: appB
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appB'
- name: Create PG cluster
ansible.builtin.shell: >
pg_createcluster
-d {{ item.someDB.datadir }}
when:
- item.name == 'appA'
- item.someDB.enable
loop: "{{ applications }}"
Some comments:
Adding a unique name to the task will make it easier to debug your playbooks, specially when you have a long playbook or role
using > in shell will take care to collapse the instructions as a single line, so you won't need the slash
Usually to create a postgress database, you would prefer to use the postgresql_db Ansible module; the -d <directory> is preferred to be set in the configuration file, so you wouldn't need it as an argument.
Create the list of enabled clusters
clusters: "{{ applications|dict2items|
json_query('[?value.someDB.enable].key') }}"
gives
clusters:
- appA
- appB
Then, the task below creates the run-strings you want
- debug:
msg: "pg_createcluster -d {{ applications[item].someDB.datadir }}"
loop: "{{ clusters }}"
gives (abridged)
msg: pg_createcluster -d /var/lib/postgresql/11/appA
msg: pg_createcluster -d /var/lib/postgresql/11/appB
Example of a complete playbook for testing
- hosts: localhost
vars:
applications:
appA:
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appA'
appB:
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appB'
clusters: "{{ applications|dict2items|
json_query('[?value.someDB.enable].key') }}"
tasks:
- debug:
var: clusters
- debug:
msg: "pg_createcluster -d {{ applications[item].someDB.datadir }}"
loop: "{{ clusters }}"
Notes:
You can get both the key and the value by substitution
- debug:
msg: "{{ _key }}: {{ _val }}"
loop:
- appA
- appB
when: applications[item].someDB.enable
vars:
_key: "applications.{{ item }}.someDB.datadir"
_val: "{{ applications[item].someDB.datadir }}"
gives (abridged)
msg: 'applications.appA.someDB.datadir: /var/lib/postgresql/11/appA'
msg: 'applications.appB.someDB.datadir: /var/lib/postgresql/11/appB'
Create a dictionary to simplify the searching
app_datadir: "{{ dict(applications|dict2items|
json_query('[].[key, value.someDB.datadir]')) }}"
gives
app_datadir:
appA: /var/lib/postgresql/11/appA
appB: /var/lib/postgresql/11/appB
Use this dictionary "to make Ansible do substitutions". For example,
- debug:
msg: "applications.{{ item }}.someDB.datadir: {{ app_datadir[item] }}"
loop:
- appA
- appB
gives (abridged)
msg: 'applications.appA.someDB.datadir: /var/lib/postgresql/11/appA'
msg: 'applications.appB.someDB.datadir: /var/lib/postgresql/11/appB'
Example of a complete playbook for testing
- hosts: localhost
vars:
applications:
appA:
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appA'
appB:
someDB:
enable: true
datadir: '/var/lib/postgresql/11/appB'
app_datadir: "{{ dict(applications|dict2items|
json_query('[].[key, value.someDB.datadir]')) }}"
tasks:
- debug:
var: app_datadir
- debug:
msg: "applications.{{ item }}.someDB.datadir: {{ app_datadir[item] }}"
loop:
- appA
- appB
You can also create the dictionary app_enable
app_enable: "{{ dict(applications|dict2items|
json_query('[].[key, value.someDB.enable]')) }}"
gives
app_enable:
appA: true
appB: true
and use it in the condition. For example,
- debug:
msg: "applications.{{ item }}.someDB.datadir: {{ app_datadir[item] }}"
loop:
- appA
- appB
when: app_enable[item]
I need to simultaneously traverse a data structure to align the values, I get this structure with the code below :
- name: Set instances
set_fact:
instance_db:
- 'db2inst1'
- 'db2inst2'
- name: Get Dialog Path
shell: db2 get dbm cfg | grep -i "Current member resolved DIAGPATH" | awk {'print $6'}
become: true
become_method: sudo
become_flags: -i
become_user: "{{ item }}"
loop: "{{ instance_db }}"
register: kud_path
- name: set_fact
set_fact:
db2_store: "[{{ instance_db | list }}] + [{{ kud_path.results|map(attribute='stdout')|list }}]"
vars:
db2_store: []
Result
{
"changed": false,
"ansible_facts": {
"db2_store": [
"db2inst1",
"db2inst2",
[
"/db2home/db2inst1/sqllib/db2dump/DIAG0000/",
"/home/db2inst2/sqllib/db2dump/DIAG0000/"
]
]
},
"_ansible_no_log": false
}
Now I need to automatically traverse these indexes where I put [*]. Because as it is, I can only access the data like this item[0][1]
- name: Creating silent config
template:
src: template.txt.j2
dest: '/tmp/template{{ item[0][*] | lower }}.txt'
mode: '0775'
loop:
- "{{ db2_store }}"
This workaround was necessary to be able to pass both values to the template
Template
################## Database connection config ##################
INSTANCE={{ item[0][*] }}
DIAGLOG_PATH={{ item[1][*] }}db2diag.log
Any suggestions on how to do this or a more elegant way to get the same result?
Assuming the following:
instance_db = ["db2inst1", "db2inst2"]
kud_path.results|map(attribute='stdout')|list = ["/db2home/db2inst1/sqllib/db2dump/DIAG0000/", "/home/db2inst2/sqllib/db2dump/DIAG0000/"]
Then you can use the zip filter which will pair the Nth element of the first list with the Nth element of the second list.
- debug:
msg: "{{ instance_db | zip(kud_path.results|map(attribute='stdout')|list) }}"
Outputs:
TASK [debug] ********************************************************************
ok: [localhost] => {
"msg": [
[
"db2inst1",
"/db2home/db2inst1/sqllib/db2dump/DIAG0000/"
],
[
"db2inst2",
"/home/db2inst2/sqllib/db2dump/DIAG0000/"
]
]
}
This makes it easy for you to loop over:
- name: Creating silent config
template:
src: template.txt.j2
dest: '/tmp/template{{ item[0] | lower }}.txt'
mode: '0775'
loop: "{{ instance_db | zip(kud_path.results|map(attribute='stdout')|list) }}"
################## Database connection config ##################
INSTANCE={{ item[0] }}
DIAGLOG_PATH={{ item[1] }}db2diag.log
Can somone explain to me why this doesn't work? I want to get a list of files within a directory and use it as an input for the loop.
---
tasks:
- set_fact:
capabilities: []
- name: find CE_Base capabilities
find:
paths: /opt/netsec/ansible/orchestration/capabilities/CE_BASE
patterns: '*.yml'
register: CE_BASE_capabilities
- name: debug_files
debug:
msg: "{{ item.path }}"
with_items: "{{ CE_BASE_capabilities.files }}"
- set_fact:
thispath: "{{ item.path }}"
capabilities: "{{ capabilities + [ thispath ] }}"
with_items: "{{ CE_BASE_capabilities.files }}"
- name: Include CE_BASE
include_tasks: /opt/netsec/ansible/orchestration/process_capabilities_CE_BASE.yml
loop: "{{ capabilities }}"
Edit:
This code is attempting to create a list called capabilties, which contatins a list of files in a particular directory.
When i ran this code without trying to get the files automatically, it looked like this.
- hosts: localhost
vars:
CE_BASE_capabilities:
- '/opt/netsec/ansible/orchestration/capabilities/CE_BASE/CE_BASE_1.yml'
- '/opt/netsec/ansible/orchestration/capabilities/CE_BASE/CE_BASE_2.yml'
- name: Include CE_BASE
include_tasks: /opt/netsec/ansible/orchestration/process_capabilities_CE_BASE.yml
loop: "{{ CE_BASE_capabilities }}"
Don't define thispath as a fact but as a local vars in the set_fact task. Beside that, you don't need to init capabilities if you use the default filter.
- vars:
thispath: "{{ item.path }}"
set_fact:
capabilities: "{{ capabilities | default([]) + [ thispath ] }}"
with_items: "{{ CE_BASE_capabilities.files }}"
Moreover, you don't even need to loop. You can extract the info directly from the existing result:
- set_fact:
capabilities: "{{ CE_BASE_capabilities.files | map(attribute='path') | list }}"
I'd like to obtain the list of bridged interfaces grouped by master like this:
brv100:
- vnet0
- eth0
brv101:
- vnet1
- eth1
I want to use native json output from the shell commands.
The only thing I managed to do is to get a predefined number of interfaces like this:
- hosts: localhost
gather_facts: no
tasks:
- shell:
cmd: ip -details -pretty -json link show type bridge
register: list_bridges
- set_fact:
bridges: "{{ list_bridges.stdout }}"
- debug:
msg: "{{ bridges | map(attribute='ifname') | list}}"
- name: get json
shell:
cmd: ip -details -pretty -json link show master "{{ifname}}"
with_items: "{{bridges | map(attribute='ifname') | list}}"
loop_control:
loop_var: ifname
register: list_interfaces
- set_fact:
interfaces: "{{ list_interfaces.results | map(attribute='stdout') | list }}"
- set_fact:
toto: "{{interfaces.1}} + {{interfaces.2}}"
- debug:
msg: "{{toto | map(attribute='ifname')|list}}"
Now if I want to do the same with a loop :
- set_fact:
toto: " {{item|default([])}}+ {{ item |default([])}}.{{idx}} "
loop: "{{interfaces}}"
loop_control:
label: "{{item}}"
index_var: idx
- debug: var=toto
The result doesn't seem to be a list of list, but a list of strings and I can't extract the 'ifname' values with a simple debug
- debug:
msg: "{{toto | map(attribute='ifname')|list}}"
What am I supposed to do so as to get benefit of the json native output and get simple list of bridged interfaces (like brctl show was used to do)?
The lists of bridged interfaces grouped by the master are available in ansible_facts. The task below sets the dictionary of the bridges and bridged interfaces
- set_fact:
bridges: "{{ dict(ansible_facts|
dict2items|
json_query('[?value.type == `bridge`].[key, value.interfaces]')) }}"
Q: "Manage to get the same result manipulating JSON data."
A: The output of the ip -json ... command is JSON formated string which must be converted to JSON dictionary in Ansible by the from_yaml filter (JSON is a subset of YAML). For example, the tasks below give the same result
vars:
my_debug: false
tasks:
- name: Get bridges names
command: "ip -details -json link show type bridge"
register: list_bridges
- set_fact:
bridges: "{{ list_bridges.stdout|
from_yaml|
map(attribute='ifname')|
list }}"
- debug:
var: bridges
when: my_debug
- name: Get bridges interfaces
command: "ip -details -json link show master {{ item }}"
loop: "{{ bridges }}"
register: list_interfaces
- set_fact:
bridges_interfaces: "{{ list_interfaces.results|
json_query('[].stdout')|
map('from_yaml')|
list }}"
- debug:
msg: "{{ msg.split('\n') }}"
vars:
msg: "{{ item|to_nice_yaml }}"
loop: "{{ bridges_interfaces }}"
loop_control:
label: "{{ item|json_query('[].ifname') }}"
when: my_debug
- name: Set dictionary of bridges
set_fact:
bridges_dict: "{{ bridges_dict|
default({})|
combine({item.0: item.1|json_query('[].ifname')}) }}"
loop: "{{ bridges|zip(bridges_interfaces)|list }}"
loop_control:
label: "{{ item.1|json_query('[].ifname') }}"
- debug:
var: bridges_dict
Template to write the bridges to a file
{% for k,v in bridges_dict.items() %}
{{ k }}:
{% if v is iterable %}
{% for i in v %}
- {{ i }}
{% endfor %}
{% endif %}
{% endfor %}
- name: Write the bridges to file
template:
src: bridges.txt.j2
dest: bridges.txt
The file bridges.txt will be created in the remote host running the task.
I'm trying to access the elements of a list, but whenever I try to access it's elements they are treated as text (see the debug output).
How can I loop over the elements of content[0]?
ansible version: 2.5.1
playbook.yml:
- hosts: localhost
gather_facts: no
vars:
content: []
tasks:
- name: Call the Consul API to get all registered services
uri:
url: "https://{{API_URL}}/v1/health/service/{{item}}?Status=critical"
headers:
Authorization: "Bearer {{TOKEN}}"
method: GET
return_content: yes
status_code: 200
body_format: json
force: yes
register: r
with_items:
- service1
- service2
- set_fact:
content: "{{ lookup('flattened', r | json_query('results[*].content')) }}"
- debug:
msg: "{{ content[0][0] | type_debug }}"
- debug:
msg: "{{ item | type_debug }}"
with_items: "{{ content[0] }}"
debug output:
TASK [debug]
ok: [127.0.0.1] => {
"msg": "dict"
}
TASK [debug]
ok: [127.0.0.1] => (item=None) => {
"msg": "AnsibleUnsafeText"
}
I'm hoping this question and answer will help you. I think the approach you are taking is the problem.