Ansible nested loops - loops

I have a variable that looks like this:
device:
- sdb: 2
- sdc: 3
- sdd: 4
How can I produce the result with ansible loops:
sdb 1
sdb 2
sdc 1
sdc 2
sdc 3
sdd 1
sdd 2
sdd 3
sdd 4
I tried with_sequence and loop_control but it didn't work.

Wrote a debug task with ansible loop and jinja which should give you the desired result. Refactor as required.
- name: Debug device var
debug:
msg: "{% for key, value in item.iteritems() %}{% for i in range(value) %} {{ key }} {{ loop.index }} {% endfor %}{% endfor %}"
loop: "{{ device }}"

Finally, I got the solution but I changed the format of the variable, however. The variable is changed to:
device:
sdb: 2
sdc: 3
sdd: 4
The result is:
ok: [ceph-host-2] => (item=1) => {
"msg": "sdd 1"
}
ok: [ceph-host-2] => (item=2) => {
"msg": "sdd 2"
}
ok: [ceph-host-2] => (item=3) => {
"msg": "sdd 3"
}
ok: [ceph-host-2] => (item=4) => {
"msg": "sdd 4"
}
TASK [osd : debug]
ok: [ceph-host-2] => (item=1) => {
"msg": "sdb 1"
}
ok: [ceph-host-2] => (item=2) => {
"msg": "sdb 2"
}
TASK [osd : debug]
ok: [ceph-host-2] => (item=1) => {
"msg": "sdc 1"
}
ok: [ceph-host-2] => (item=2) => {
"msg": "sdc 2"
}
ok: [ceph-host-2] => (item=3) => {
"msg": "sdc 3"
}
main.yml
- include_tasks: inner.yml
loop: "{{ device.keys() }}"
loop_control:
loop_var: outer_item
inner.yml
- debug:
msg: "{{ outer_item }} {{ item }}"
with_sequence: count={{ device[outer_item] }}

The variable is:
device:
- sdb: 2
- sdc: 3
- sdd: 4
main.yml
- include_tasks: inner.yml
loop: "{{ device }}"
loop_control:
loop_var: outer_item
inner.yml
- debug:
msg: "{{ outer_item.keys()[0] }} {{ item }}"
with_sequence: count={{ outer_item.values()[0] }}

Related

Ansible: iterate over output with loop and get values for each list

I'm unsure if the title matches to what I'm trying to ask but I didn't know what other title to use.
So my question:
What I'm trying to do is gather disk info from VMWare and post the output of capacity_in_kb for EACH disk in a file (but currently only debug).
- name: Gather disk info from virtual machine
community.vmware.vmware_guest_disk_info:
hostname: "{{ lookup('ansible.builtin.env', 'VMWARE_HOST') }}"
username: "{{ lookup('ansible.builtin.env', 'VMWARE_USER') }}"
password: "{{ lookup('ansible.builtin.env', 'VMWARE_PASSWORD') }}"
validate_certs: no
name: "{{ ansible_hostname }}"
datacenter: "{{ lookup('ansible.builtin.env', 'VMWARE_HOST') }}"
delegate_to: 127.0.0.1
register: disk_info
- debug:
var: disk_info
This outputs the following:
{
"disk_info": {
"guest_disk_info": {
"0": {
"key": 2000,
"label": "Hard disk 1",
"summary": "16,777,216 KB",
"backing_filename": "[xxx] xxx.vmdk",
"backing_datastore": "xxx_log",
"controller_key": 1000,
"unit_number": 0,
"capacity_in_kb": 16777216,
"capacity_in_bytes": 17179869184,
"backing_type": "FlatVer2",
"backing_writethrough": false,
"backing_thinprovisioned": false,
"backing_eagerlyscrub": false,
"backing_diskmode": "persistent",
"backing_disk_mode": "persistent",
"backing_uuid": "xxxxxxxxxxxxxxxx",
"controller_bus_number": 0,
"controller_type": "paravirtual"
},
"1": {
"key": 2001,
"label": "Hard disk 2",
"summary": "262,144,000 KB",
"backing_filename": "[xxx] xxx.vmdk",
"backing_datastore": "xxx_log",
"controller_key": 1000,
"unit_number": 1,
"capacity_in_kb": 262144000,
"capacity_in_bytes": 268435456000,
"backing_type": "FlatVer2",
"backing_writethrough": false,
"backing_thinprovisioned": false,
"backing_eagerlyscrub": false,
"backing_diskmode": "persistent",
"backing_disk_mode": "persistent",
"backing_uuid": "xxx",
"controller_bus_number": 0,
"controller_type": "paravirtual"
}
},
"failed": false,
"changed": false
},
"_ansible_verbose_always": true,
"_ansible_no_log": false,
"changed": false
}
We now want to get capacity_in_kb for every disk. Some VMs only have one disk attached, some have two, some three and so on...
We tried
- name: with_dict
ansible.builtin.debug:
msg: "{{ item.value.label }} - {{ item.value.capacity_in_kb }}"
loop: "{{ disk_info.guest_disk_info|dict2items }}"
but that also doesn't work for us and only gives us the output of the first disk [0] in the list.
Does anyone have an idea? Thanks in advance :)
Edit: as #β.εηοιτ.βε pointet out it's
- loop: "{{ disk_info|dict2items }}"
+ loop: "{{ disk_info.guest_disk_info|dict2items }}"
but still it only iterates over the first disk and not the second, third, etc..
EDIT2: it worked, but I just didn't see it...dumb me
If you want to iterate the data, the task below
- debug:
msg: "{{ item.value.label }}: {{ item.value.capacity_in_kb }}"
loop: "{{ disk_info.guest_disk_info|dict2items }}"
loop_control:
label: "{{ item.key }}"
gives
ok: [localhost] => (item=0) =>
msg: 'Hard disk 1: 16777216'
ok: [localhost] => (item=1) =>
msg: 'Hard disk 2: 262144000'
The next option is to avoid the iteration and create a dictionary
label_capacity_q: '*.[label, capacity_in_kb]'
label_capacity: "{{ dict(disk_info.guest_disk_info|
json_query(label_capacity_q)) }}"
gives
label_capacity:
Hard disk 1: 16777216
Hard disk 2: 262144000
Example of a complete playbook for testing
- hosts: localhost
vars:
label_capacity_q: '*.[label, capacity_in_kb]'
label_capacity: "{{ dict(disk_info.guest_disk_info|
json_query(label_capacity_q)) }}"
tasks:
- debug:
var: label_capacity
- debug:
msg: "{{ item.key }}: {{ item.value }}"
loop: "{{ label_capacity|dict2items }}"
- debug:
msg: |-
{% for k,v in label_capacity.items() %}
{{ k }}: {{ v }}
{% endfor %}
gives (abridged)
TASK [debug] *********************************************************************************
ok: [localhost] =>
label_capacity:
Hard disk 1: 16777216
Hard disk 2: 262144000
TASK [debug] *********************************************************************************
ok: [localhost] => (item={'key': 'Hard disk 1', 'value': 16777216}) =>
msg: 'Hard disk 1: 16777216'
ok: [localhost] => (item={'key': 'Hard disk 2', 'value': 262144000}) =>
msg: 'Hard disk 2: 262144000'
TASK [debug] *********************************************************************************
ok: [localhost] =>
msg: |-
Hard disk 1: 16777216
Hard disk 2: 262144000
Given the data, for example in group_vars
shell> cat group_vars/all/disk_info.yml
---
disk_info:
changed: false
failed: false
guest_disk_info:
'0':
backing_datastore: xxx_log
backing_disk_mode: persistent
backing_diskmode: persistent
backing_eagerlyscrub: false
backing_filename: '[xxx] xxx.vmdk'
backing_thinprovisioned: false
backing_type: FlatVer2
backing_uuid: xxxxxxxxxxxxxxxx
backing_writethrough: false
capacity_in_bytes: 17179869184
capacity_in_kb: 16777216
controller_bus_number: 0
controller_key: 1000
controller_type: paravirtual
key: 2000
label: Hard disk 1
summary: 16,777,216 KB
unit_number: 0
'1':
backing_datastore: xxx_log
backing_disk_mode: persistent
backing_diskmode: persistent
backing_eagerlyscrub: false
backing_filename: '[xxx] xxx.vmdk'
backing_thinprovisioned: false
backing_type: FlatVer2
backing_uuid: xxx
backing_writethrough: false
capacity_in_bytes: 268435456000
capacity_in_kb: 262144000
controller_bus_number: 0
controller_key: 1000
controller_type: paravirtual
key: 2001
label: Hard disk 2
summary: 262,144,000 KB
unit_number: 1

Iterate over nested loops

I am trying to iterate over level3 variable in Ansible. I've prepared a playbook like this:
---
- hosts: localhost
gather_facts: no
connection: local
vars:
level1:
- abc
- def
level2:
- { name: "app1", level3: ["aaaa","bbbb"]}
- { name: "app2", level3: ["eeeee"]}
tasks:
- name: test
debug: msg="{{ item.0 }} {{ item.1.name }} {{ item.2 }}"
with_nested:
- "{{ level1 }}"
- "{{ level2 }}"
- "{{ level2.level3 }}"
But I get error:
PLAY [localhost] ***************************************************************************************************************************************************
TASK [test] ********************************************************************************************************************************************************
fatal: [localhost]: FAILED! => {"msg": "'list object' has no attribute 'level3'"}
PLAY RECAP *********************************************************************************************************************************************************
localhost : ok=0 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0
What is bad with my config? I want to have on output each element.
level2.level3 does not exist. level2 is a list so e.g. level2.0.level3 exists.
I'm not entirely sure from your question but I think what you are looking for is:
- debug:
msg: "{{ item.0 }} {{ item.1.0.name }} {{ item.1.1 }}"
loop: "{{ level1 | product(level2 | subelements('level3')) }}"
You can keep the older with_ syntax using the nested lookup if you wish. The produced result is a bit different so you have to adapt to the datastructure:
- debug:
msg: "{{ item.0 }} {{ item.1.name }} {{ item.2 }}"
with_nested:
- "{{ level1 }}"
- "{{ level2 | subelements('level3') }}"
which can eventually be written back to a loop: syntax as follow:
- debug:
msg: "{{ item.0 }} {{ item.1.name }} {{ item.2 }}"
loop: "{{ q('nested', level1, level2 | subelements('level3')) }}"
All examples give the same result (delta the spitted item for each iteration, example output with first proposition)
PLAY [localhost] *****************************************************************************************************************************************
TASK [debug] *********************************************************************************************************************************************
ok: [localhost] => (item=['abc', [{'name': 'app1', 'level3': ['aaaa', 'bbbb']}, 'aaaa']]) => {
"msg": "abc app1 aaaa"
}
ok: [localhost] => (item=['abc', [{'name': 'app1', 'level3': ['aaaa', 'bbbb']}, 'bbbb']]) => {
"msg": "abc app1 bbbb"
}
ok: [localhost] => (item=['abc', [{'name': 'app2', 'level3': ['eeeee']}, 'eeeee']]) => {
"msg": "abc app2 eeeee"
}
ok: [localhost] => (item=['def', [{'name': 'app1', 'level3': ['aaaa', 'bbbb']}, 'aaaa']]) => {
"msg": "def app1 aaaa"
}
ok: [localhost] => (item=['def', [{'name': 'app1', 'level3': ['aaaa', 'bbbb']}, 'bbbb']]) => {
"msg": "def app1 bbbb"
}
ok: [localhost] => (item=['def', [{'name': 'app2', 'level3': ['eeeee']}, 'eeeee']]) => {
"msg": "def app2 eeeee"
}
PLAY RECAP ***********************************************************************************************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

Ansible; using a loop to cycle through variables

I have an inventory in which many host_vars are set. Each host will contain a different number of datasets.
e.g.
host: host1
ip-addr: 192.0.2.12/24
datasets:
set1:
var1: 'east'
var2: 'west'
set2:
var1: 'north'
var2: 'south'
I can create a loop to count the datasets, but I don't seem able to use it to reference [varX]:
- name: "test loop"
debug:
msg:
- "{{ item }}"
- "{{ 'datasets.set' + item + '.var1' }}"
- "{{ datasets.set1.var1 }}"
loop: "{{ query('sequence', 'start=1 end='+((datasets|length)|string)) }}"
This appears to assemble the variable name I'm attempting to reference, however does not return the value associated with it. Manually calling that variable does return the interesting value.
ok: [host1] => (item=1) => {
"msg": [
"1",
"datasets.set1.var1",
"east"
]
}
ok: [host1] => (item=2) => {
"msg": [
"2",
"datasets.set2.var1",
"east"
]
}
Is what I'm doing possible, or should I be approaching it from another angle?
thanks in advance.
The task
- debug:
msg: "set{{ item }}.var1 = {{ datasets['set' ~ item].var1 }}"
loop: "{{ range(1, datasets|length+1)|list }}"
gives
"msg": "set1.var1 = east"
"msg": "set2.var1 = north"

Ansible: iterate over a list of dictionaries - loop vs. with_items

I'm getting different results when using loop vs with_items when trying to iterate over a list of dictionaries.
I've tried using loop|dict2items (the structure isn't a dictionary, & it tells me as much. heh) and loop with the flatten filter.
Here is the list of dictionaries:
"msg": [
{
"id": "id1",
"ip": "ip1",
"name": "name1"
},
{
"id": "id2",
"ip": "ip2",
"name": "name2"
},
{
"id": "id3",
"ip": "ip3",
"name": "name3"
},
{
"id": "id4",
"ip": "ip4",
"name": "name4"
}
]
}
Here is the task in the playbook:
- name: Add privateIp windows_instances to inventory
add_host:
name: "{{ item.ip }}"
aws_name: "{{ item.name }}"
groups: windows_instances
aws_instanceid: "{{ item.id }}"
ansible_user: "{{ windows_user }}"
ansible_password: "{{ windows_password }}"
ansible_port: 5985
ansible_connection: winrm
ansible_winrm_server_cert_validation: ignore
loop:
- "{{ list1 | flatten(levels=1) }}"
When attempting to run the above code, I get the "list object has no attribute" error. I've tried different flatten levels to no avail.
HOWEVER...
If I simply replace the loop above with:
with_items:
- "{{ list1 }}"
Everything works perfectly. I'm missing something in the with_items > loop translation here...
Don't put a - before your list.
And here, you have a list of dicts, so you don't need to flatten neither.
This playbook:
- hosts: localhost
gather_facts: no
vars:
demo_list:
- ip: 1.2.3.4
id: 1
name: demo1
- ip: 2.2.3.4
id: 2
name: demo2
- ip: 3.2.3.4
id: 3
name: demo3
tasks:
- name: the list
debug:
msg: "{{ demo_list }}"
- name: unflattened list
debug:
msg: "{{ item.id }} {{ item.ip }} {{ item.name }}"
loop:
"{{ demo_list }}"
- name: flattened list == unflattened list in this case
debug:
msg: "{{ item.id }} {{ item.ip }} {{ item.name }}"
loop:
"{{ demo_list | flatten(levels=1) }}"
gives this result:
PLAY [localhost] ***************************************************************************************
TASK [the list] ****************************************************************************************
ok: [localhost] => {
"msg": [
{
"id": 1,
"ip": "1.2.3.4",
"name": "demo1"
},
{
"id": 2,
"ip": "2.2.3.4",
"name": "demo2"
},
{
"id": 3,
"ip": "3.2.3.4",
"name": "demo3"
}
]
}
TASK [unflattened list] ********************************************************************************
ok: [localhost] => (item=None) => {
"msg": "1 1.2.3.4 demo1"
}
ok: [localhost] => (item=None) => {
"msg": "2 2.2.3.4 demo2"
}
ok: [localhost] => (item=None) => {
"msg": "3 3.2.3.4 demo3"
}
TASK [flattened list == unflattened list in this case] *************************************************
ok: [localhost] => (item=None) => {
"msg": "1 1.2.3.4 demo1"
}
ok: [localhost] => (item=None) => {
"msg": "2 2.2.3.4 demo2"
}
ok: [localhost] => (item=None) => {
"msg": "3 3.2.3.4 demo3"
}
PLAY RECAP *********************************************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=0

Multiple loops in ansible task

I'm trying to use vars to perform loops in ansible but I'm struggling to get them to work. The documentation talks about the loop attribute but as far as I can tell, this only works if you have one loop in a task.
Is it possible to use different loops in a task or must it be split into different tasks?
- name: "Configure ufw"
ufw:
policy: "{{ defaults.policy }}"
direction: "{{ defaults.direction }}"
rule: allow
src: "{{ rules }}"
logging: on
state: enabled
vars:
defaults:
- { direction: incoming, policy: deny }
- { direction: outgoing, policy: allow }
rules:
- 80/tcp
- 443/tcp
When I run the code I get the error
"msg": "The task includes an option with an undefined variable. The error was: 'list object' has no attribute 'direction'
What you need is with_nested. This:
---
- hosts: localhost
become: no
connection: local
vars:
defaults:
- { direction: incoming, policy: deny }
- { direction: outgoing, policy: allow }
rules:
- 80/tcp
- 443/tcp
tasks:
- name: Change connect file to bulk mode
debug:
msg: "{{ item.0.direction }}: {{ item.1 }}"
with_nested:
- "{{ defaults }}"
- "{{ rules }}"
Gives this output:
TASK [Change connect file to bulk mode] *********************************************************************************************
ok: [localhost] => (item=None) => {
"msg": "incoming: 80/tcp"
}
ok: [localhost] => (item=None) => {
"msg": "incoming: 443/tcp"
}
ok: [localhost] => (item=None) => {
"msg": "outgoing: 80/tcp"
}
ok: [localhost] => (item=None) => {
"msg": "outgoing: 443/tcp"
}
with_nested may be an option, as per Jack's answer.
Alternately, and possibly the currently preferred mechanism, is to use loop: "{{ your_first_list | product (your_second_list) | list }}" to combine your multiple lists into a single list.
For example, this:
- name: test
ansible.builtin.debug:
msg: "{{ item.0.0 }} - {{ item.0.1}} - {{ item.1 }}"
loop: "{{ [ ['incoming','deny'], ['outgoing','allow']] | product( [ '80/tcp', '443/tcp' ] ) | list }}"
produces this output:
ok: [examplehost.my.example.com] => (item=[[u'incoming', u'deny'], u'80/tcp']) => {
"msg": "incoming - deny - 80/tcp"
}
ok: [examplehost.my.example.com] => (item=[[u'incoming', u'deny'], u'443/tcp']) => {
"msg": "incoming - deny - 443/tcp"
}
ok: [examplehost.my.example.com] => (item=[[u'outgoing', u'allow'], u'80/tcp']) => {
"msg": "outgoing - allow - 80/tcp"
}
ok: [examplehost.my.example.com] => (item=[[u'outgoing', u'allow'], u'443/tcp']) => {
"msg": "outgoing - allow - 443/tcp"
}

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