I'm traying to set a value for a prompt variable with the next code:
- name: "test"
hosts: localhost
connection: local
become: yes
vars_prompt:
- name: https
prompt: Use https(yes/NO)?
private: no
default: no
vars:
protocol: "{{ 'https' if https else 'http' }}"
tasks:
- debug:
msg: "{{ https | bool }}"
- debug:
msg: "{{ protocol }}"
The result is allways https.. why?
Use https(yes/NO)? [False]: no
PLAY [test] ********************************************************************************************************************************************************************************
TASK [Gathering Facts] *********************************************************************************************************************************************************************
ok: [localhost]
TASK [debug] *******************************************************************************************************************************************************************************
ok: [localhost] => {
"msg": false
}
TASK [debug] *******************************************************************************************************************************************************************************
ok: [localhost] => {
"msg": "https"
}
PLAY RECAP *********************************************************************************************************************************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
I have read a lot of questions here, and the correct way to do this is defining the conditional variable like I'm doing... I really don't know if there is any problem to do it with a prompted variable...
I found the answer to my own question... The correct way to do this is to use " | bool":
- name: "test"
hosts: localhost
connection: local
become: yes
vars_prompt:
- name: https
prompt: Use https(yes/NO)?
private: no
default: no
vars:
protocol: "{{ 'https' if (https | bool) else 'http' }}"
tasks:
- debug:
msg: "{{ https | bool }}"
- debug:
msg: "{{ protocol }}"
Related
I am trying to ask Ansible to check if a server is passive or active based on the value of a specific file in each server, then Ansible will decide which server it runs the next script on.
For example with 2 servers:
Server1
cat /tmp/currentstate
PASSIVE
Server2
cat /tmp/currentstate
ACTIVE
In Ansible
Trigger next set of jobs on server where the output was ACTIVE.
Once the jobs complete, trigger next set of jobs on server where output was PASSIVE
What I have done so far to grab the state, and output the value to Ansible is
- hosts: "{{ hostname1 | mandatory }}"
gather_facts: no
tasks:
- name: Grab state of first server
shell: |
cat {{ ans_script_path }}currentstate.log
register: state_server1
- debug:
msg: "{{ state_server1.stdout }}"
- hosts: "{{ hostname2 | mandatory }}"
gather_facts: no
tasks:
- name: Grab state of second server
shell: |
cat {{ ans_script_path }}currentstate.log
register: state_server2
- debug:
msg: "{{ state_server2.stdout }}"
What I have done so far to trigger the script
- hosts: "{{ active_hostname | mandatory }}"
tasks:
- name: Run the shutdown on active server first
shell: sh {{ ans_script_path }}stopstart_terracotta_main.sh shutdown
register: run_result
- debug:
msg: "{{ run_result.stdout }}"
- hosts: "{{ passive_hostname | mandatory }}"
tasks:
- name: Run the shutdown on passive server first
shell: sh {{ ans_script_path }}stopstart_terracotta_main.sh shutdown
register: run_result
- debug:
msg: "{{ run_result.stdout }}"
but I don't know how to set the value of active_hostname & passive_hostname based on the value from the script above.
How can I set the Ansible variable of active_hostname & passive_hostname based on the output of the first section?
A better solution came to my mind is to include hosts in new groups according to their state.
This would be more optimal in case there are more than two hosts.
- hosts: all
gather_facts: no
vars:
ans_script_path: /tmp/
tasks:
- name: Grab state of server
shell: |
cat {{ ans_script_path }}currentstate.log
register: server_state
- add_host:
hostname: "{{ item }}"
# every host will be added to a new group according to its state
groups: "{{ 'active' if hostvars[item].server_state.stdout == 'ACTIVE' else 'passive' }}"
# Shorter, but the new groups will be in capital letters
# groups: "{{ hostvars[item].server_state.stdout }}"
loop: "{{ ansible_play_hosts }}"
changed_when: false
- name: show the groups the host(s) are in
debug:
msg: "{{ group_names }}"
- hosts: active
gather_facts: no
tasks:
- name: Run the shutdown on active server first
shell: hostname -f # changed that for debugging
register: run_result
- debug:
msg: "{{ run_result.stdout }}"
- hosts: passive
gather_facts: no
tasks:
- name: Run the shutdown on passive server first
shell: hostname -f
register: run_result
- debug:
msg: "{{ run_result.stdout }}"
test-001 is PASSIVE
test-002 is ACTIVE
PLAY [all] ***************************************************************
TASK [Grab state of server] **********************************************
ok: [test-002]
ok: [test-001]
TASK [add_host] **********************************************************
ok: [test-001] => (item=test-001)
ok: [test-001] => (item=test-002)
TASK [show the groups the host(s) are in] ********************************
ok: [test-001] => {
"msg": [
"passive"
]
}
ok: [test-002] => {
"msg": [
"active"
]
}
PLAY [active] *************************************************************
TASK [Run the shutdown on active server first] ****************************
changed: [test-002]
TASK [debug] **************************************************************
ok: [test-002] => {
"msg": "test-002"
}
PLAY [passive] ************************************************************
TASK [Run the shutdown on passive server first] ****************************
changed: [test-001]
TASK [debug] **************************************************************
ok: [test-001] => {
"msg": "test-001"
}
PLAY RECAP ****************************************************************
test-001 : ok=5 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
test-002 : ok=4 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
For example, given two remote hosts
shell> ssh admin#test_11 cat /tmp/currentstate.log
ACTIVE
shell> ssh admin#test_13 cat /tmp/currentstate.log
PASSIVE
The playbook below reads the files and runs the commands on active and passive servers
shell> cat pb.yml
- hosts: "{{ host1 }},{{ host2 }}"
gather_facts: false
vars:
server_states: "{{ dict(ansible_play_hosts|
zip(ansible_play_hosts|
map('extract', hostvars, ['server_state', 'stdout'])|
list)) }}"
server_active: "{{ server_states|dict2items|
selectattr('value', 'eq', 'ACTIVE')|
map(attribute='key')|list }}"
server_pasive: "{{ server_states|dict2items|
selectattr('value', 'eq', 'PASSIVE')|
map(attribute='key')|list }}"
tasks:
- command: cat /tmp/currentstate.log
register: server_state
- debug:
var: server_state.stdout
- block:
- debug:
var: server_states
- debug:
var: server_active
- debug:
var: server_pasive
run_once: true
- command: echo 'Shutdown active server'
register: out_active
delegate_to: "{{ server_active.0 }}"
- command: echo 'Shutdown passive server'
register: out_pasive
delegate_to: "{{ server_pasive.0 }}"
- debug:
msg: |
{{ server_active.0 }}: [{{ out_active.stdout }}] {{ out_active.start }}
{{ server_pasive.0 }}: [{{ out_pasive.stdout }}] {{ out_pasive.start }}
run_once: true
shell> ansible-playbook pb.yml -e host1=test_11 -e host2=test_13
PLAY [test_11,test_13] ***********************************************************************
TASK [command] *******************************************************************************
changed: [test_13]
changed: [test_11]
TASK [debug] *********************************************************************************
ok: [test_11] =>
server_state.stdout: ACTIVE
ok: [test_13] =>
server_state.stdout: PASSIVE
TASK [debug] *********************************************************************************
ok: [test_11] =>
server_states:
test_11: ACTIVE
test_13: PASSIVE
TASK [debug] *********************************************************************************
ok: [test_11] =>
server_active:
- test_11
TASK [debug] *********************************************************************************
ok: [test_11] =>
server_pasive:
- test_13
TASK [command] *******************************************************************************
changed: [test_11]
changed: [test_13 -> test_11]
TASK [command] *******************************************************************************
changed: [test_11 -> test_13]
changed: [test_13]
TASK [debug] *********************************************************************************
ok: [test_11] =>
msg: |-
test_11: [Shutdown active server] 2022-10-27 11:16:00.766309
test_13: [Shutdown passive server] 2022-10-27 11:16:02.501907
PLAY RECAP ***********************************************************************************
test_11: ok=8 changed=3 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
test_13: ok=4 changed=3 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
From the description of your use case I understand that you like to perform tasks on certain servers which a have service role installed (annot.: Terracotta Server) and based on a certain service state.
Therefore, I like to recommend an approach with Custom facts.
Depending on if you have control about where the currentstate.log is placed or how it is structured, you could use in example something like
cat /tmp/ansible/service/terracotta.fact
[currentstate]
ACTIVE = true
PASSIVE = false
or add dynamic facts by adding executable scripts to facts.d ...
Means, alternatively, you can add the current service state to your host facts by creating and running a script in facts.d, which would just read the content of /tmp/currentstate.log.
Then, a sample playbook like
---
- hosts: localhost
become: false
gather_facts: true
fact_path: /tmp/ansible/service
gather_subset:
- "!all"
- "!min"
- "local"
tasks:
- name: Show Gathered Facts
debug:
msg: "{{ ansible_facts }}"
when: ansible_local.terracotta.currentstate.active | bool
will result into an output of
TASK [Show Gathered Facts] ******
ok: [localhost] =>
msg:
ansible_local:
terracotta:
currentstate:
active: 'true'
passive: 'false'
gather_subset:
- '!all'
- '!min'
- local
module_setup: true
An other approach is to address How the inventory is build and Group the hosts
[terracotta:children]
terracotta_active
terracotta_passive
[terracotta_active]
terracotta1.example.com
[terracotta_passive]
terracotta2.example.com
You can then just easily and simple define where a playbook or task should run, just by Targeting hosts and groups
ansible-inventory -i hosts--graph
#all:
|--#terracotta:
| |--#terracotta_active:
| | |--terracotta1.example.com
| |--#terracotta_passive:
| | |--terracotta2.example.com
|--#ungrouped:
ansible-inventory -i hosts terracotta_active --graph
#terracotta_active:
|--terracotta1.example.com
or Conditionals based on ansible_facts, in example
when: 'terracotta_active' in group_names
... from my understanding, both would be minimal and simple solutions without re-implementing functionality which seems to be already there.
ansible version: 2.9.16 running on RHEL 7.9 python ver = 2.7.5 targeting windows 2016 servers. ( should behave the same for linux target servers too)
EDIT: Switched to using host specific variables in inventory to avoid confusion that Iam just trying to print hostnames of a group. Even here its a gross simplification. Pretend that var1 is obtained dynamically for each server instead of being declared in the inventory file.
My playbook has two plays. One targets 3 remote servers ( Note: serial: 0 i.e Concurrently ) and another just the localhost. In play1 I am trying to delegate facts obtained from each of these hosts to the localhost using delegate_facts and delegate_to. The intent is to have these facts delegated to a single host ( localhost ) so I can use it later in a play2 (using hostvars) that targets the localhost. But strangely thats not working. It only has information from the last host from Play1.
Any help will be greatly appreciated.
my inventory file inventory/test.ini looks like this:
[my_servers]
svr1 var1='abc'
svr2 var1='xyz'
svr3 var1='pqr'
My Code:
## Play1
- name: Main play that runs against multiple remote servers and builds a list.
hosts: 'my_servers' # my inventory group that contains 3 servers svr1,svr2,svr3
any_errors_fatal: false
ignore_unreachable: true
gather_facts: true
serial: 0
tasks:
- name: initialize my_server_list as a list and delegate to localhost
set_fact:
my_server_list: []
delegate_facts: yes
delegate_to: localhost
- command: /root/complex_script.sh
register: result
- set_fact:
my_server_list: "{{ my_server_list + hostvars[inventory_hostname]['result.stdout'] }}"
# run_once: true ## Commented as I need to query the hostvars for each host where this executes.
delegate_to: localhost
delegate_facts: true
- name: "Print list - 1"
debug:
msg:
- "{{ hostvars['localhost']['my_server_list'] | default(['NotFound']) | to_nice_yaml }}"
# run_once: true
- name: "Print list - 2"
debug:
msg:
- "{{ my_server_list | default(['NA']) }}"
## Play2
- name: Print my_server_list which was built in Play1
hosts: localhost
gather_facts: true
serial: 0
tasks:
- name: "Print my_server_list without hostvars "
debug:
msg:
- "{{ my_server_list | to_nice_json }}"
# delegate_to: localhost
- name: "Print my_server_list using hostvars"
debug:
msg:
- "{{ hostvars['localhost']['my_server_list'] | to_nice_yaml }}"
# delegate_to: localhost
###Output###
$ ansible-playbook -i inventory/test.ini delegate_facts.yml
PLAY [Main playbook that runs against multiple remote servers and builds a list.] ***********************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************
ok: [svr3]
ok: [svr1]
ok: [svr2]
TASK [initialize] ***************************************************************************************************************************************************************************
ok: [svr1]
ok: [svr2]
ok: [svr3]
TASK [Build a list of servers] **************************************************************************************************************************************************************
ok: [svr1]
ok: [svr2]
ok: [svr3]
TASK [Print list - 1] ***********************************************************************************************************************************************************************
ok: [svr1] =>
msg:
- |-
- pqr
ok: [svr2] =>
msg:
- |-
- pqr
ok: [svr3] =>
msg:
- |-
- pqr
TASK [Print list - 2] ***********************************************************************************************************************************************************************
ok: [svr1] =>
msg:
- - NA
ok: [svr2] =>
msg:
- - NA
ok: [svr3] =>
msg:
- - NA
PLAY [Print my_server_list] *****************************************************************************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************
ok: [localhost]
TASK [Print my_server_list without hostvars] ************************************************************************************************************************************************
ok: [localhost] =>
msg:
- |-
[
"pqr"
]
TASK [Print my_server_list using hostvars] **************************************************************************************************************************************************
ok: [localhost] =>
msg:
- |-
- pqr
PLAY RECAP **********************************************************************************************************************************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
svr1 : ok=5 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
svr2 : ok=5 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
svr3 : ok=5 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Playbook run took 0 days, 0 hours, 0 minutes, 13 seconds
###Expected Output###
I was expecting the last two debug statements in Play2 to contain the values of var1 for all the servers something like this:
TASK [Print my_server_list using hostvars] **************************************************************************************************************************************************
ok: [localhost] =>
msg:
- |-
- abc
- xyz
- pqr
Use Special Variables, e.g.
- hosts: all
gather_facts: false
tasks:
- set_fact:
my_server_list: "{{ ansible_play_hosts_all }}"
run_once: true
delegate_to: localhost
delegate_facts: true
- hosts: localhost
gather_facts: false
tasks:
- debug:
var: my_server_list
gives
ok: [localhost] =>
my_server_list:
- svr1
- svr2
- svr3
There are many other ways how to create the list, e.g.
- hosts: all
gather_facts: false
tasks:
- debug:
msg: "{{ groups.my_servers }}"
run_once: true
- hosts: all
gather_facts: false
tasks:
- debug:
msg: "{{ hostvars|json_query('*.inventory_hostname') }}"
run_once: true
Q: "Fill the list with outputs gathered by running complex commands."
A: Last example above shows how to create a list from hostvars. Register the result from the complex command, e.g.
shell> ssh admin#srv1 cat /root/complex_script.sh
#!/bin/sh
ifconfig wlan0 | grep inet | cut -w -f3
The playbook
- hosts: all
gather_facts: false
tasks:
- command: /root/complex_script.sh
register: result
- set_fact:
my_server_list: "{{ hostvars|json_query('*.result.stdout') }}"
run_once: true
delegate_to: localhost
delegate_facts: true
- hosts: localhost
gather_facts: false
tasks:
- debug:
var: my_server_list
gives
my_server_list:
- 10.1.0.61
- 10.1.0.62
- 10.1.0.63
Q: "Why the logic of delegating facts to localhost and keep appending them to that list does not work?"
A: The code below (simplified) can't work because the right-hand-side msl value still comes from the hostvars of the inventory_host despite the fact delegate_facts: true. This merely puts the created variable msl into the localhost's hostvars
- hosts: my_servers
tasks:
- set_fact:
msl: "{{ msl|default([]) + [inventory_hostname] }}"
delegate_to: localhost
delegate_facts: true
Quoting from Delegating facts
To assign gathered facts to the delegated host instead of the current host, set delegate_facts to true
As a result of such code, the variable msl will keep the last assigned value only.
I have this URL string server https://test.example.com:6443. I need to extract only hostname test from it using Ansible task.
came up with this playbook, Is there a better way of doing this with-out using sed?
- hosts: localhost
connection: local
gather_facts: no
tasks:
- name: get the URL
shell: echo 'server https://test.example.com:6443' |sed -e 's/^.*https...//' -e 's/\..*$//'
register: result
- name: Print the var
debug:
msg: "{{ result.stdout }}"
Output
PLAY [localhost] *********************************************************************************************************************
TASK [get the URL] *******************************************************************************************************************
changed: [localhost]
TASK [Print the var] *****************************************************************************************************************
ok: [localhost] => {
"msg": "test"
}
PLAY RECAP ***************************************************************************************************************************
localhost : ok=2 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
You can use split on the URL name and get the desired value, Ideally hostname should be test.example.com in your case. However, you can customize the split function based on your need also as below.
- hosts: localhost
connection: local
gather_facts: no
vars:
url: "https://test.example.com:6443"
tasks:
- name: Print the hostname var
debug:
msg: "{{ url.split(':')[1].split('//')[1] }}"
- name: Print the subdomain prefix
debug:
msg: "{{ url.split(':')[1].split('//')[1].split('.')[0] }}"
I want to create a list from comma separated string to pass to loop in ansible, sometime variable can have only one value also
var1=test1,test2 and it can be var1=test1 also
here is my code
- name: Separate facts
set_fact: groups="{{ var1.split(',') }}"
- name: delete
gcp_compute_instance_group:
name: "{{ item }}"
zone: xxx
project: xxx
auth_kind: serviceaccount
service_account_file: xxx
state: absent
loop: "{{ groups }}"
this doesn't work, how can i achieve my requirement
your filter is correct, you do get a list variable. please see below PB and output:
---
- hosts: localhost
gather_facts: false
vars:
var1: test1,test2
var2: test3
tasks:
- name: Create the list
set_fact:
list_var1: "{{ var1.split(',') }}"
list_var2: "{{ var2.split(',') }}"
- debug:
var: list_var1
- debug:
var: list_var2
result:
[is#orangehat-29 temp]$ ansible-playbook test.yml
[WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'
PLAY [localhost] ***********************************************************************************************************************************************************************************************************************
TASK [Create the list] *****************************************************************************************************************************************************************************************************************
ok: [localhost]
TASK [debug] ***************************************************************************************************************************************************************************************************************************
ok: [localhost] => {
"list_var1": [
"test1",
"test2"
]
}
TASK [debug] ***************************************************************************************************************************************************************************************************************************
ok: [localhost] => {
"list_var2": [
"test3"
]
}
PLAY RECAP *****************************************************************************************************************************************************************************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
[is#orangehat-29 temp]$
I've got a simple ansible playbook that works fine on most ios devices. It fails on some of my 3850 switches with what looks like a timeout when doing a "show conf". How do I specify a longer, non-default timeout for command completion with the ios_command module (and presumably also ios_config)?
Useful details:
Playbook:
---
- hosts: ios_devices
gather_facts: no
connection: local
tasks:
- name: OBTAIN LOGIN CREDENTIALS
include_vars: secrets.yaml
- name: DEFINE PROVIDER
set_fact:
provider:
host: "{{ inventory_hostname }}"
username: "{{ creds['username'] }}"
password: "{{ creds['password'] }}"
- name: LIST NAME SERVERS
ios_command:
provider: "{{ provider }}"
commands: "show run | inc name-server"
register: dns_servers
- debug: var=dns_servers.stdout_lines
successful run:
$ ansible-playbook listnameserver.yaml -i inventory/onehost
PLAY [ios_devices] *****************************************************************************************************************
TASK [OBTAIN LOGIN CREDENTIALS] ****************************************************************************************************
ok: [iosdevice1.example.com]
TASK [DEFINE PROVIDER] *************************************************************************************************************
ok: [iosdevice1.example.com]
TASK [LIST NAME SERVERS] ***********************************************************************************************************
ok: [iosdevice1.example.com]
TASK [debug] ***********************************************************************************************************************
ok: [iosdevice1.example.com] => {
"dns_servers.stdout_lines": [
[
"ip name-server 10.1.1.166",
"ip name-server 10.1.1.168"
]
]
}
PLAY RECAP *************************************************************************************************************************
iosdevice1.example.com : ok=4 changed=0 unreachable=0 failed=0
unsuccessful run:
$ ansible-playbook listnameserver.yaml -i inventory/onehost
PLAY [ios_devices] *****************************************************************************************************************
TASK [OBTAIN LOGIN CREDENTIALS] ****************************************************************************************************
ok: [iosdevice2.example.com]
TASK [DEFINE PROVIDER] *************************************************************************************************************
ok: [iosdevice2.example.com]
TASK [LIST NAME SERVERS] ***********************************************************************************************************
fatal: [iosdevice2.example.com]: FAILED! => {"changed": false, "msg": "timeout trying to send command: show run | inc name-server", "rc": 1}
to retry, use: --limit #/home/sample/ansible-playbooks/listnameserver.retry
PLAY RECAP *************************************************************************************************************************
iosdevice2.example.com : ok=2 changed=0 unreachable=0 failed=1
The default timeout is 10 seconds if the request takes longer than this ios_command will fail.
You can add the timeout as a key in the provider variable, like this:
- name: DEFINE PROVIDER
set_fact:
provider:
host: "{{ inventory_hostname }}"
username: "{{ creds['username'] }}"
password: "{{ creds['password'] }}"
timeout: 30
If you've already got a timeout value in provider here's a handy way to update only that key in the variable.
- name: Update existing provider timeout key
set_fact:
provider: "{{ provider | combine( {'timeout': '180'} ) }}"