Ansible2.6— replace module example

00_README.md

Command example ( for localhost )

ansible-playbook 01_replace_playbook.yml

Comand example ( for docker )

docker run -d -p 2222:22 yumainaura/python-ssh
ansible-playbook 01_replace_playbook.yml -i docker_inventory.example.txt | tee ansible_playbook_result.txt

Versions

• ansible 2.6.1

Links

• replace - Replace all instances of a particular string in a file using a back-referenced regular expression. — Ansible Documentation

01_replace_playbook.yml

- hosts:
    - localhost

  tasks:
    - name: copy
      copy:
        src: people_source.txt
        dest: people_replaced.txt

    - name: Replace "Alice" by "Alice is a lady" in each lines
      replace:
        path: people_replaced.txt
        regexp: '^Alice$'
        replace: Alice is a lady
        before: 'REPLACE ALICE BEFORE THIS LINE'

    - name: Replace "Bob (lastname)" by "Bob (lastname) is a gentleman" in each lines
      replace:
        path: people_replaced.txt
        # () is capture of regular expression
        regexp: '^Bob ([a-zA-Z]+)$'
        # \1 is replaced by first captured strings
        replace: 'Bob \1 is a gentleman'

    - name: Replace "Carol" 
      replace:
        path: people_replaced.txt
        regexp: '^Carol$'
        replace: 'Carol is a loving child'
        after: 'REPLACE CAROL AFTER THIS LINE'
        #before: REPLACE CAROL BEFORE THIS LINE # Umm can not be used in combination with "after" ... why?

    - name: check replaced file
      slurp:
        src: people_replaced.txt
      register: replaced_file

    - name: check replaced file body
      debug:
        msg: "{{ replaced_file.content | b64decode }}"

ansible_playbook_result.txt

PLAY [localhost] **************************************************************************************************************************

TASK [Gathering Facts] ********************************************************************************************************************
ok: [localhost]

TASK [copy] *******************************************************************************************************************************
changed: [localhost]

TASK [Replace "Alice" by "Alice is a lady" in each lines] *********************************************************************************
changed: [localhost]

TASK [Replace "Bob (lastname)" by "Bob (lastname) is a gentleman" in each lines] **********************************************************
changed: [localhost]

TASK [Replace "Carol"] ********************************************************************************************************************
changed: [localhost]

TASK [check replaced file] ****************************************************************************************************************
ok: [localhost]

TASK [check replaced file body] ***********************************************************************************************************
ok: [localhost] => {
    "msg": "Alice is a lady\nBob Marley is a gentleman\nCarol\nAlice is a lady\nREPLACE ALICE BEFORE THIS LINE\nBob Wills is a gentleman\nREPLACE CAROL AFTER THIS LINE\nCarol is a loving child\nAlice\nBob Horper is a gentleman\nCarol is a loving child\n"
}

PLAY RECAP ********************************************************************************************************************************
localhost                  : ok=7    changed=4    unreachable=0    failed=0   

docker_inventory.example.txt

[example]
localhost

[example:vars]
ansible_user=root
ansible_port=2222
ansible_ssh_pass=screencast

gist.url

https://gist.github.com/YumaInaura/592121dd8dc2a71b796591ccc4564f31

medium.url

https://medium.com/supersonic-generation/ansible2-6-replace-module-example-a3e3c6a0b992

people_replaced.txt

Alice is a lady
Bob Marley is a gentleman
Carol
Alice is a lady
REPLACE ALICE BEFORE THIS LINE
Bob Wills is a gentleman
REPLACE CAROL AFTER THIS LINE
Carol is a loving child
Alice
Bob Horper is a gentleman
Carol is a loving child

people_source.txt

Alice
Bob Marley
Carol
Alice
REPLACE ALICE BEFORE THIS LINE
Bob Wills
REPLACE CAROL AFTER THIS LINE
Carol
Alice
Bob Horper
Carol

qiita.url

https://qiita.com/YumaInaura/items/0cf2976b09d0658fc38e