This is below question in which i need to reset the value of one of the
variable -
Query: I need to fetch the latest java version from host servers and
display the same on web page, using apache server which is installed on my
local server(local server means server with ansible installed).
I am able to fetch the value, but need to reset the value of one of the
variable to blank , below are the details.
*I need to make it run time activity like ---when i have Both Hosts :
zlp12036 and zlp12037, it must show the java version for both on my local
server which has apache installedwhen i have Only one Host i.e.zlp12036,
it must show the java version for zlp12036 only *
*on my local server which has apache installed.*Host File Details -
[myserver]
zlp12036 ansible_ssh_host=zlp12036.vci.att.com ansible_ssh_user=abc
#zlp12037 ansible_ssh_host=zlp12037.vci.att.com ansible_ssh_user=abc
Playbook:
---
- hosts: myserver
tasks:
- name: Get the Host Name
shell: host $(hostname -i) | awk '{print $NF }'|sed 's/\.$//'
register: hosts
- set_fact: the_hosts=hosts.stdout
- debug: var={{the_hosts}}
- name: Fetch Java Version
shell: java -version 2>&1 | grep version | awk '{print $3}' | sed
's/"//g'
register: result
- set_fact: the_count=result.stdout
- debug: var={{the_count}}
- hosts: localhost
tasks:
- debug: var=hostvars['zlp12036']['
result']['stdout']
- debug: var=hostvars['zlp12037']['result']['stdout']
- debug: var=hostvars['zlp12036']['hosts']['stdout']
- debug: var=hostvars['zlp12037']['hosts']['stdout']
- copy:
content: "<table style='width:50%'align='center';border='1'>
<tr bgcolor='#DEB887'>
<td colspan='2'><center><b> JAVA VERSION FOR HOST
SERVERS</b> <center></td>
</tr>
<tr bgcolor='#00FFFF'>
<th style='width:50%'>Server Name</th>
<th style='width:50%'>Current Java Version</th>
</tr>
<tr bgcolor='#7FFFD4'>
<td style='width:50%'><center>{{
hostvars['zlp12036']['hosts']['stdout'] }}</center></td>
<td style='width:50%'><center>{{
hostvars['zlp12036']['result']['stdout'] }}<center></td>
</tr>
<tr bgcolor='#7FFFD4'>
<td style='width:50%'><center>{{
hostvars['zlp12037']['hosts']['stdout'] }}</center></td>
<td style='width:50%'><center>{{
hostvars['zlp12037']['result']['stdout'] }}<center></td>
</tr>
</table>"
dest: /opt/app/capio/apache/users/htdocs/index.html
This works fine when in host file i have both the entries of zlp12036 and
zlp12037, It fails when i comment one of the host server(zlp12037).
Error -
TASK [debug]
*******************************************************************
ok: [localhost] => {
"hostvars['zlp12037']['hosts']['stdout']": "VARIABLE IS NOT DEFINED!"
----------------------------------------------------------------------------------------------------------------------------------------------------
I can understand the reason, as the zlp12037 is commented , so it wont have
any value. can I make *value of hostvars['zlp12037']['hosts']['stdout'] to
null*, so that we can overcome the exception and it should show the java
version of zlp12036 only.
Or is there any workaround for this.
Any suggestion how can i achieve this.
On Tuesday, 11 April 2017 23:03:31 UTC+5:30, nishant bawane wrote:
>
> Hi,
>
> Can you please once review my question -Ansible -Need to reset the value
> of variable before command.
>
> I need assistance for that question, and i am trying different ways for it.
>
> On Tuesday, 11 April 2017 21:53:10 UTC+5:30, J Hawkesworth wrote:
>>
>> What is it that you are trying to do? It might be possible to do another
>> way.
>>
>> Sometimes I use two set_fact tasks with mutually exclusive when
>> conditions.
>>
>> As long as you remember that you don't need "{{ }}" on your when
>> conditions and the conditions evaluate to a boolean, when conditions can be
>> useful.
>>
>> Jon
>>
>>
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