Ansible
- list available inventory variables of a host
- Split/Join example
- Read data from csv-file example
- sprintf like output example
- filter examples
list available inventory variables of a host
chris@knechtruprecht [~]: ansible-inventory --host=hostname
Split/Join example
split.yml
---
- name: Split Example
hosts: localhost
gather_facts: false
tags: ['splitexample']
tasks:
- set_fact:
Orginal: "subsub.sub.domain.de"
- set_fact:
Subdomain: "{{ Orginal.split('.')[1:] | join('.') }}"
- set_fact:
Domain: "{{ Orginal.split('.')[2:] | join('.') }}"
- ansible.builtin.debug:
msg:
- "Orginal: '{{ Orginal }}'"
- "Subdomain: '{{ Subdomain }}'"
- "Domain: '{{ Domain }}'"
chris@knechtruprecht [~]: ansible-playbook split.yml
PLAY [Split Example] ***************************************************
TASK [set_fact] ********************************************************
ok: [localhost]
TASK [set_fact] ********************************************************
ok: [localhost]
TASK [set_fact] ********************************************************
ok: [localhost]
TASK [ansible.builtin.debug] *******************************************
ok: [localhost] => {
"msg": [
"Orginal: 'subsub.sub.domain.de'",
"Subdomain: 'sub.domain.de'",
"Domain: 'domain.de'"
]
}
PLAY RECAP *************************************************************
localhost: ok=4 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Read data from csv-file example
community.general.read_csv module
csv.yml
---
- name: read data from csv-file
hosts: localhost
gather_facts: false
tags: ['csv']
tasks:
- name: Read users from CSV file and return a dictionary
community.general.read_csv:
path: users.csv
key: UID
delimiter: ;
register: users
- ansible.builtin.debug:
msg:
- "UID: {{ item.key }}"
- "GID: {{ item.value.GID }}"
- "User: {{ item.value.User }}"
loop: "{{ users.dict|dict2items }}"
- name: read data from csv-file
hosts: localhost
gather_facts: false
tags: ['csv']
tasks:
- name: Read users from CSV file and return a dictionary
community.general.read_csv:
path: users.csv
key: UID
delimiter: ;
register: users
- ansible.builtin.debug:
msg:
- "UID: {{ item.key }}"
- "GID: {{ item.value.GID }}"
- "User: {{ item.value.User }}"
loop: "{{ users.dict|dict2items }}"
users.csv:
UID;GID;User
1005;1007;chris
1006;1007;stefan
1007;1008;heinz
output:
chris@knechtruprecht [~]: ansible-playbook csv.yml
PLAY [read data from csv-file] ***********************************************************************************
TASK [Read users from CSV file and return a dictionary] **********************************************************
ok: [localhost]
TASK [ansible.builtin.debug] *************************************************************************************
ok: [localhost] => (item={u'key': u'1007', u'value': {u'GID': u'1008', u'UID': u'1007', u'User': u'heinz'}}) => {
"msg": [
"UID: 1007",
"GID: 1008",
"User: heinz"
]
}
ok: [localhost] => (item={u'key': u'1006', u'value': {u'GID': u'1007', u'UID': u'1006', u'User': u'stefan'}}) => {
"msg": [
"UID: 1006",
"GID: 1007",
"User: stefan"
]
}
ok: [localhost] => (item={u'key': u'1005', u'value': {u'GID': u'1007', u'UID': u'1005', u'User': u'chris'}}) => {
"msg": [
"UID: 1005",
"GID: 1007",
"User: chris"
]
}
PLAY RECAP *******************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 Top
PLAY [read data from csv-file] ***********************************************************************************
TASK [Read users from CSV file and return a dictionary] **********************************************************
ok: [localhost]
TASK [ansible.builtin.debug] *************************************************************************************
ok: [localhost] => (item={u'key': u'1007', u'value': {u'GID': u'1008', u'UID': u'1007', u'User': u'heinz'}}) => {
"msg": [
"UID: 1007",
"GID: 1008",
"User: heinz"
]
}
ok: [localhost] => (item={u'key': u'1006', u'value': {u'GID': u'1007', u'UID': u'1006', u'User': u'stefan'}}) => {
"msg": [
"UID: 1006",
"GID: 1007",
"User: stefan"
]
}
ok: [localhost] => (item={u'key': u'1005', u'value': {u'GID': u'1007', u'UID': u'1005', u'User': u'chris'}}) => {
"msg": [
"UID: 1005",
"GID: 1007",
"User: chris"
]
}
PLAY RECAP *******************************************************************************************************
localhost : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 Top
sprintf like output example
Output of an integer variable with two digits (with leading zero if less than 10)
- set_fact:
variable: "{{ '%02d'|format(Counter|int) }}"
variable: "{{ '%02d'|format(Counter|int) }}"
filter examples
check if a string, stored in the variable "SearchVariable" is part of the variable "Variable"
I found a lot examples with Variable|search(SearchVariable) - this is not working since ansible 2.9
Also found a lot examples with a static searchstring
- set_fact:
Variable: "This ist just a example"
SearchVariable: "just"
- set_fact:
var1: "{{ SearchVariable }} was found in {{ Variable }}"
when: SearchVariable | string in Variable
Variable: "This ist just a example"
SearchVariable: "just"
- set_fact:
var1: "{{ SearchVariable }} was found in {{ Variable }}"
when: SearchVariable | string in Variable
- set_fact:
Variable: "This ist just a example"
SearchVariable: "nonsense"
- set_fact:
var1: "{{ SearchVariable }} was not found in {{ Variable }}"
when: SearchVariable | string not in Variable
Variable: "This ist just a example"
SearchVariable: "nonsense"
- set_fact:
var1: "{{ SearchVariable }} was not found in {{ Variable }}"
when: SearchVariable | string not in Variable
check if a variable is ""
- set_fact:
Variable: "new content"
when: Variable|length == 0
Variable: "new content"
when: Variable|length == 0