I want to check a directory with ansible if it's not empty. I want to have the server hostname or IP address if the directory is not empty. Can anyone help me? Thanks!
I tried to make a test.
- hosts: all
tasks:
- find :
paths: /tmp/foo
file_type: all
hidden: true
register: out
- fail :
msg: the /tmp/foo directory is not empty
when: out.matched != 0
Q: "Check a directory and list servers if empty."
A: There are two very useful patterns you should go step by step through and understand the details.
For example, given two remote hosts, the directory is empty on the second one
shell> ssh admin@test_11 find /tmp/test_dir
/tmp/test_dir
/tmp/test_dir/bar
/tmp/test_dir/foo
shell> ssh admin@test_13 find /tmp/test_dir
/tmp/test_dir
Find the files
- find:
paths: /tmp/test_dir
file_type: any
hidden: true
register: out
report: "{{ dict(ansible_play_hosts|
zip(ansible_play_hosts|
map('extract', hostvars, ['out', 'matched']))) }}"
gives
report:
test_11: 2
test_13: 0
empty: "{{ report|dict2items|
rejectattr('value')|
map(attribute='key') }}"
gives what you want
empty:
- test_13
Example of a complete playbook for testing
- hosts: all
vars:
report: "{{ dict(ansible_play_hosts|
zip(ansible_play_hosts|
map('extract', hostvars, ['out', 'matched']))) }}"
empty: "{{ report|dict2items|
rejectattr('value')|
map(attribute='key') }}"
tasks:
- find:
paths: /tmp/test_dir
file_type: any
hidden: true
register: out
- debug:
var: report
run_once: true
- debug:
var: empty
run_once: true
I want to check a directory with Ansible if it's not empty.
Since it is not defined what empty means and if there could be zero byte files, I understand your question that you are interested in the folder size.
According Use folder size in Conditional
The size attribute returned by the stat module for a folder does not tell you the size of the folder's contents! It only reports the size of the directory entry, which may depend on a number of factors such as the number of files contained in the directory.
If you're looking to calculate the amount of data contained in a folder, you may proceed further with the answer there or Ansible: Need generic solution to find size of folder/directory or file.
Since that require to use command or shell which is not generally recommended for all cases, it might be possible to transfer the task into a Custom Module. To do so, creating a Custom Module written in Bash or Shell seems to be the best approach.
The following concept / example module takes a string parameter (path) and test if it is a directory or file. After it is providing the size of the directory with all files and including sub directories or the file size only as results set.
Concept / Example Module size.sh
#!/bin/sh
exec 3>&1 4>&2 > /dev/null 2>&1
# Create functions
function return_json() {
exec 1>&3 2>&4
jq --null-input --monochrome-output \
--arg changed "$changed" \
--arg rc "$rc" \
--arg stdout "$stdout" \
--arg stderr "$stderr" \
--arg directory "$directory" \
--arg file "$file" \
--arg msg "$msg" \
'$ARGS.named'
exec 3>&1 4>&2 > /dev/null 2>&1
}
# Module helper functions
function dirsize() {
du -sh "$path" | sort -h
}
function filesize() {
du -sh "$path"
}
# Module main logic
function module_logic() {
if [ -f "$path" ]; then
filesize $path
file="true"
elif [ -d "$path" ]; then
dirsize $path
directory="true"
else
stderr="Cannot access: No such file or directory or Permission denied."
rc=1
fi
}
# Set default values
changed="false"
rc=0
stdout=""
stderr=""
directory="false"
file="false"
msg=""
source "$1"
# Check prerequisites
if ! which jq &>/dev/null; then
exec 1>&3 2>&4
printf "{ \"changed\": \"$changed\",
\"rc\": \"1\" ,
\"stdout\": \"\",
\"stderr\": \"Command not found: This module require 'jq' installed on the target host. Exiting ...\",
\"directory\": \"false\" ,
\"file\": \"false\",
\"msg\": \"\"}"
exit 127
fi
if ! grep -q "Red Hat Enterprise Linux" /etc/redhat-release; then
stderr="Operation not supported: Red Hat Enterprise Linux not found. Exiting ..."
rc=95
return_json
exit $rc
fi
# Validate parameter key and value
if [ -z "$path" ]; then
stderr="Invalid argument: Parameter path is not provided. Exiting ..."
rc=22
return_json
exit $rc
fi
if [[ $path == *['!:*']* ]]; then
stderr="Invalid argument: Value path contains invalid characters. Exiting ..."
rc=22
return_json
exit $rc
fi
if [ ${#path} -ge 127 ]; then
stderr="Argument too long: Value path has too many characters. Exiting ..."
rc=7
return_json
exit $rc
fi
# Main
module_logic $path
changed="false"
msg=$(module_logic $path | sed 's/\t/ /g')
return_json
exit $rc
Test Playbook size.yml
---
- hosts: test
become: false
gather_facts: false
tasks:
- name: Get size behind path
size:
path: /root/anaconda-ks.cfg
register: result
ignore_errors: true
- name: Get size behind path
size:
path: ''
register: result
ignore_errors: true
- name: Get size behind path
size:
register: result
ignore_errors: true
- name: Get size behind path
size:
path: "/home/{{ ansible_user }}/*"
register: result
ignore_errors: true
- name: Get size behind path
size:
path: "/home/{{ ansible_user }}/1111111111/2222222222/3333333333/4444444444/5555555555/6666666666/7777777777/8888888888/9999999999/0000000000/aaaaaaaaaa/bbbbbbbbbb/cccccccccc/"
register: result
ignore_errors: true
- name: Get size behind path
size:
path: /home/{{ ansible_user }}
register: result
- name: Show result
debug:
var: result
Result ansible-playbook --user ${ANSIBLE_USER} size.yml
TASK [Get size behind path] **********************************************
fatal: [test.example.com]: FAILED! => changed=false
msg: ''
rc: '1'
stderr: 'Cannot access: No such file or directory or Permission denied.'
stderr_lines: <omitted>
stdout: ''
stdout_lines: <omitted>
...ignoring
TASK [Get size behind path] **********************************************
fatal: [test.example.com]: FAILED! => changed=false
msg: ''
rc: '1'
stderr: Parameter path is not provided. Exiting ...
stderr_lines: <omitted>
stdout: ''
stdout_lines: <omitted>
...ignoring
TASK [Get size behind path] **********************************************
fatal: [test.example.com]: FAILED! => changed=false
directory: 'false'
file: 'false'
msg: ''
rc: '22'
stderr: 'Invalid argument: Value path contains invalid characters. Exiting ...'
stderr_lines: <omitted>
stdout: ''
stdout_lines: <omitted>
...ignoring
TASK [Get size behind path] **********************************************
fatal: [test.example.com]: FAILED! => changed=false
msg: ''
rc: '7'
stderr: Argument 'path' too long. Exiting ...
stderr_lines: <omitted>
stdout: ''
stdout_lines: <omitted>
...ignoring
TASK [Get size behind path] **********************************************
changed: [test.example.com]
TASK [Show result] *******************************************************
ok: [test.example.com] =>
result:
changed: 'false'
failed: false
msg: 722M /home/user
rc: '0'
stderr: ''
stderr_lines: []
stdout: ''
stdout_lines: []
Thanks to
For script and module
For general Linux and Shell
