I'm trying to get the IP address of one of my remote hosts by querying my
controller machine's /etc/hosts file which happens to contain the IP
addresses of all the servers I build with Ansible. My Ansible playbook
looks like this:
---
hosts: all
gather_facts: yes
become: yes
pre_tasks:
- name: get file server's IP address
command: "grep prod-fs1 /etc/hosts | awk '{ print $0 }'"
register: fs_ip_addr
delegate_to: localhost
- debug: var={{ fs_ip_addr }}
However, I'm getting this error which I don't know how to fix:
TASK [get file server's IP address]
*************************************************************************************************************************************************
fatal: [prod-web1.example.com -> localhost]: FAILED! => {"changed": true,
"cmd": ["grep", "prod-fs1", "/etc/hosts", "|", "awk", "{ print $0 }"],
"delta": "0:00:00.010303", "end": "2020-03-03 12:24:36.207656", "msg":
"non-zero return code", "rc": 2, "start": "2020-03-03 12:24:36.197353",
"stderr": "grep: |: No such file or directory\ngrep: awk: No such file or
directory\ngrep: { print $0 }: No such file or directory", "stderr_lines":
["grep: |: No such file or directory", "grep: awk: No such file or
directory", "grep: { print $0 }: No such file or directory"], "stdout":
"/etc/hosts:45.79.93.135 prod-fs1.example.com prod-fs1",
"stdout_lines": ["/etc/hosts:45.79.93.135 prod-fs1.example.com
prod-fs1"]}
PLAY RECAP
**************************************************************************************************************************************************************************
prod-web1.example.com : ok=7 changed=0 unreachable=0 failed=1
skipped=0 rescued=0 ignored=0;p
It appears that the error is caused by the pipe symbol which is why I
enclosed the entire command in double quotes. But the error occurs even if
I remove them.
I should add that I know I could use this method of getting the IP address
of my file server...
- name: get file server's IP address
set_fact: fs_ip_addr=hostvars[groups['fileservers'][0]]['ansible_eth0
']['ipv4']['address']
However, this option isn't available to me since I have to call the
playbook with the "limit" argument which cause the variable to not be
available.
deploy-webservers.yml -I inventory -l webservers
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