Ansible 1.9.2 / 1.9.4
CentOS 6.7
I'm trying to find the IP address of a given hostname which is stored in the inventory file. If you see the my playbook, I got the IP of the hostname which I'm trying to find (see the first -debug section) but that's when I used "with_items" and passed "{{ groups['zabbix_server'] }}" as an item.
But now I'm trying to find the IP without using the hostname[item].... way i.e. directly using groups['zabbix_server'] way. How can I get the IP address of the host which is listed in hosts inventory file under zabbix_server directly? i.e. without using "with_items" line/feature in Ansible.
What I'm missing here to get these errors. I tried some online similar blogs/posts but those didn't help. Using [].[] or ['something].['somethingelse'] way didn't help either and for that I get:
Failed to template msg="IP is= {{ hostvars[groups['zabbix_server']].[ansible_default_ipv4.address] }}": template error while templating string: expected name or number
or If I use this way:
IP is= {{ hostvars[groups['zabbix_server']]['ansible_default_ipv4']['address'] }}"
I get this error:
... => One or more undefined variables: 'HostVars' object has no element ['zabbix.dev-white.projectname.jenkins]
Inventory file hosts contains:
[zabbix_server]
zabbix.dev-white.projectname.jenkins
My playbook file contains:
- debug: msg="Zabbix server= {{ item }} and its IP is= {{ hostvars[item].ansible_default_ipv4.address }}"
with_items:
- "{{ groups['zabbix_server'] }}"
tags:
- lilupandut
- debug: msg="Zabbix server= {{ item }} and its IP is= {{ hostvars[groups['zabbix_server']][ansible_default_ipv4.address] }}"
with_items:
- "{{ groups['zabbix_server'] }}"
tags:
- lilupandut
#- debug: msg="Zabbix server= {{ item }} and its IP is= {{ groups['zabbix_server'][ansible_default_ipv4.address] }}"
# with_items:
# - "{{ groups['zabbix_server'] }}"
# tags:
# - lilupandut
If I run the above playbook, I get the following output (valid output from the first -debug section) and an error (for the 2nd -debug section where I'm trying to use direct way of getting to the IP address i.e. not using hostvars[item]).
$ ansible-playbook zabbix-setup.yml -i hosts -u koba --private-key ${DEPLOYER_KEY_FILE} -t lilupandut
PLAY [zabbix_server] **********************************************************
GATHERING FACTS ***************************************************************
ok: [zabbix.dev-white.projectname.jenkins]
TASK: [zabbix_install | debug msg="Zabbix server= {{ item }} and its IP is= {{ hostvars[item].ansible_default_ipv4.address }}"] ***
ok: [zabbix.dev-white.projectname.jenkins] => (item=zabbix.dev-white.projectname.jenkins) => {
"item": "zabbix.dev-white.projectname.jenkins",
"msg": "Zabbix server= zabbix.dev-white.projectname.jenkins and its IP is= 10.130.64.18"
}
TASK: [zabbix_install | debug msg="Zabbix server= {{ item }} and its IP is= {{ groups['zabbix_server'][ansible_default_ipv4.address] }}"] ***
fatal: [zabbix.dev-white.projectname.jenkins] => One or more undefined variables: 'HostVars' object has no element [zabbix.dev-white.projectname.jenkins]
FATAL: all hosts have already failed -- aborting
If I comment out the middle -debug section and un-comment the last -debug statement, then I get close to what I'm looking for "IP address" but it still error out.
This time the error / output comes as:
projectname: [zabbix_install | debug msg="Zabbix server= {{ item }} and its IP is= {{ groups['zabbix_server'][ansible_default_ipv4.address] }}"] ***
fatal: [zabbix.dev-white.projectname.jenkins] => One or more undefined variables: 'list' object has no attribute '10.130.64.18'
FATAL: all hosts have already failed -- aborting
PLAY RECAP ********************************************************************
to retry, use: --limit @/home/confman/zabbix-setup.retry
zabbix.dev-white.projectname.jenkins : ok=2 changed=0 unreachable=1 failed=0
It's not clear to my why you do not want to use the item of the list you use. All your examples have the with_items loop, so you also can use item in all examples-
Let's have a look at this task of yours:
- debug: msg="Zabbix server= {{ item }} and its IP is= {{ hostvars[groups['zabbix_server']][ansible_default_ipv4.address] }}"
with_items:
- "{{ groups['zabbix_server'] }}"
tags:
- lilupandut
So you're looping over groups['zabbix_server'] which is a list of hosts. item then would refer to each item of that list. What is the point of not using item in this case then, where you're looping over a list?
In your task then you attempt to use hostvars[groups['zabbix_server']][ansible_default_ipv4.address]. hostvars is a hash, groups['zabbix_server'] is a list. You can not use a list as an hash key and that is why you get an error like this:
I get this error: ... => One or more undefined variables: 'HostVars' object has no element ['zabbix.dev-white.projectname.jenkins]
As the error message attempts to explain, it is trying to look up a hash element with the key ['zabbix.dev-white.projectname.jenkins'].
So as said, it's not really clear to me what you try to archive. Using item would be the way to get to the correct element of the loop.
hostvars[item]
Because item holds the value zabbix.dev-white.projectname.jenkins.
If you'd have no loop involved at all you could use the first host of the zabbix_server group like this:
hostvars[groups['zabbix_server'][0]]
In words again: groups['zabbix_server'] is a list [0] accesses the first item of that list. But if you're in a loop anyway, there is actually no point in doing this.
hostvars[groups['zabbix_server'][0]]['ansible_default_ipv4']['address']
is the same as
hostvars[item]['ansible_default_ipv4']['address']