ansible ssh to json_query response values in loop - ansible

Question

Team, I have response from json_query which is a dict key:value and i would like to iterate over all values and run ssh command for each value
Below gets me list of all nodes
- name: "Fetch all nodes from clusters using K8s facts"
k8s_facts:
kubeconfig: $WORKSPACE
kind: Node
verify_ssl: no
register: node_list
- debug:
var: node_list | json_query(query)
vars:
query: 'resources[].{node_name: metadata.name, nodeType: metadata.labels.nodeType}'
TASK [3_validations_on_ssh : debug]
ok: [target1] => {
"node_list | json_query(query)": [
{
"nodeType": null,
"node_name": "host1"
},
{
"nodeType": "gpu",
"node_name": "host2"
},
{
"nodeType": "gpu",
"node_name": "host3"
}
]
}
playbook to write: parse node_name and use that in ssh command for all hosts 1-3
- name: "Loop on all nodeNames and ssh."
shell: ssh -F ~/.ssh/ssh_config bouncer#{{ item }}.internal.sshproxy.net "name -a"
register: ssh_result_per_host
failed_when: ssh_result_per_host.rc != 0
with_item: {{ for items in query.node_name }}
- debug:
var: ssh_result_per_host.stdout_lines
error output:
> The offending line appears to be:
failed_when: ssh_result_per_host.rc != 0
with_item: {{ for items in query.node_name }}
^ here
solution 2 also fails when i do loop:
shell: ssh -F ~/.ssh/ssh_config bouncer#{{ item.metadata.name }}.sshproxy.internal.net "name -a"
loop: "{{ node_list.resources }}"
loop_control:
label: "{{ item.metadata.name }}"
output sol 2:
failed: [target1] (item=host1) => {"msg": "Invalid options for debug: shell"}
failed: [target1] (item=host2) => {"msg": "Invalid options for debug: shell"}
fatal: [target1]: FAILED! => {"msg": "All items completed"}

Answer 1

To expand on Ash's correct answer:
- name: "Fetch all nodes from clusters using K8s facts"
k8s_facts:
kubeconfig: $WORKSPACE
kind: Node
verify_ssl: no
register: node_list
- set_fact:
k8s_node_names: '{{ node_list | json_query(query) | map(attribute="node_name") | list }}'
vars:
query: 'resources[].{node_name: metadata.name, nodeType: metadata.labels.nodeType}'
- name: "Loop on all nodeNames and ssh."
shell: ssh -F ~/.ssh/ssh_config bouncer#{{ item }}.internal.sshproxy.net "name -a"
register: ssh_result_per_host
with_items: '{{ k8s_node_names }}'
Separately, unless you quite literally just want to run that one ssh command, the way ansible thinks about that problem is via add_host::
- hosts: localhost
connection: local
gather_facts: no
tasks:
# ... as before, to generate the "k8s_node_names" list
- add_host:
hostname: '{{ item }}.internal.sshproxy.net'
groups:
- the_k8s_nodes
ansible_ssh_username: bouncer
# whatever other per-host variables you want
with_items: '{{ k8s_node_names }}'
# now, run the playbook against those nodes
- hosts: the_k8s_nodes
tasks:
- name: run "name -a" on the host
command: name -a
register: whatever
This is a contrived example, because if you actually wanted just to get the list of kubernetes nodes and use those in a playbook, you use would a dynamic inventory script

Answer 2

It is not with_item it is with_items
You cannot use with_item: {{ for items in query.node_name }}
Save the values to a variable and use the variable in with_items: {{ new_variable }}