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I have this code in my playbook:

- hosts: standby
  remote_user: root
  tasks:
  - name: replace hostname in config
    replace:
      path: /opt/agentd.conf
      regexp: #\s+Hostname\=
      replace: Hostname={{hname}}
      backup: yes
  - name: add database array in files
    lineinfile:
      path: /opt/zabbix_agent/share/scripts/{{ item }}
      line: 'DBNAME_ARRAY=( {{dbname}} )'
      insertafter: DB2PATH=/home/db2inst1/sqllib/bin/db2
      backup: yes
  with_items:
   - Connections
   - HadrAndLog
   - Memory
   - Regular
 - name: restart service
   shell: /etc/init.d/agent restart
   register: command_output
   become: yes
   become_user: root
   tags: restart
 - debug: msg="{{command_output.stdout_lines}}"
 tags: set_config_st

it will replace # Hostname= in a config file with Hostname= givenhostname and add an array in 4 scripts. array is the name of given database. then it will restart the agent to apply the changes.
when i run this command:

ansible-playbook -i /Ansible/inventory/hostfile /Ansible/provision/nconf.yml --tags set_config_st --extra-vars "hname=fazi dbname=fazidb"

i get this error:

first argument must be string or compiled pattern
this is the complete messege

i searched a bit but couldn't find the reason. what should i do?

1

The task which fails is this one:

 - name: replace hostname in config
   replace:
     path: /opt/agentd.conf
     regexp: #\s+Hostname\=
     replace: Hostname={{hname}}
     backup: yes

Try like this:

 - name: replace hostname in config
   replace:
     path: /opt/agentd.conf
     regexp: '#\s+Hostname\=.*$'
     replace: Hostname={{hname}}
     backup: yes

Note that if you don't add .*$, the task will only replace # Hostname= and you will end up with a Hostname=oldhostnamenewhostname.

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