Unable to execute shell script

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1

Hi All,

I am simply unable to execute a shell script on the remote host - this is my code (all other tasks run correctly except the execute task)

  • name: Power consumption test
    hosts: all
    tasks:

  • name: Transfer the script
    ansible.builtin.copy:
    src: power_consumption.sh
    dest: /usr/src/power_consumption.sh
    mode: ‘0777’

  • name: Execute the script

command: ./usr/src/power_consumption.sh

command: “{{ item }}”
args:
chdir: “/usr/src/”
with_items:

  • “./power_consumption.sh”
    ignore_errors: true

  • name: Remove shell script from remote server
    file:
    path: /usr/src/power_consumption.sh
    state: absent

  • name: Copy shell script output from remote server
    fetch:
    src: /usr/src/{{ ansible_fqdn }}.txt
    dest: /usr/src
    mode: ‘0777’
    with_fileglob:
    _ “*.txt”

I have also tried with the shell: , script: sh ways of executing the script and none of them work, can someone tell me what I am doing wrong? TIA.

2

Without any real data it’s impossible to tell.
Can you at a minimum post the error message?

3

Create a var for script i.e.: script_path=“/some/path/script” and use that instead of hard coding path

4

Thanks for the responses guys, but these are the errors I see -

The full traceback is:
File “/tmp/ansible_ansible.legacy.command_payload_uk3ys11b/ansible_ansible.legacy.command_payload.zip/ansible/module_utils/basic.py”, line 2050, in run_command
cmd = subprocess.Popen(args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3.11/subprocess.py”, line 1024, in init
self._execute_child(args, executable, preexec_fn, close_fds,
File “/usr/lib/python3.11/subprocess.py”, line 1901, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
failed: [100.91.187.42] (item=./power_consumption.sh) => {
“ansible_loop_var”: “item”,
“changed”: false,
“cmd”: “./power_consumption.sh”,
“invocation”: {
“module_args”: {
“_raw_params”: “./power_consumption.sh”,
“_uses_shell”: false,
“argv”: null,
“chdir”: “/usr/src/”,
“creates”: null,
“executable”: null,
“removes”: null,
“stdin”: null,
“stdin_add_newline”: true,
“strip_empty_ends”: true
}
},
“item”: “./power_consumption.sh”,
“msg”: “[Errno 8] Exec format error: b’./power_consumption.sh’”,
“rc”: 8,
“stderr”: “”,
“stderr_lines”: ,
“stdout”: “”,
“stdout_lines”:
}

I also create a simple foo.sh and tried to execute it like this, but here also I get errors -
foo.sh contents -
#!/bin/sh
echo “Hello world”

My TestShell script yml looks like this -

  • name: Shell script test
    hosts: all
    tasks:

  • name: Run a shell command and register its output as a variable
    ansible.builtin.shell: /usr/src/foo.sh
    register: foo_result
    ignore_errors: true

  • name: Run a shell command using output of the previous task
    ansible.builtin.shell: /usr/src/bar.sh
    when: foo_result.rc == 5

Output of the above yml gives this error -

fatal: [132.56.197.46]: FAILED! => {
“changed”: true,
“cmd”: “/usr/src/foo.sh”,
“delta”: “0:00:00.002043”,
“end”: “2024-08-21 08:32:06.317505”,
“invocation”: {
“module_args”: {
“_raw_params”: “/usr/src/foo.sh”,
“_uses_shell”: true,
“argv”: null,
“chdir”: null,
“creates”: null,
“executable”: null,
“removes”: null,
“stdin”: null,
“stdin_add_newline”: true,
“strip_empty_ends”: true
}
},
“msg”: “non-zero return code”,
“rc”: 127,
“start”: “2024-08-21 08:32:06.315462”,
“stderr”: “/bin/sh: 1: /usr/src/foo.sh: not found”,
“stderr_lines”: [
“/bin/sh: 1: /usr/src/foo.sh: not found”
],
“stdout”: “”,
“stdout_lines”:
}

5

Hi,

This if often because your ’shell’ script has the incorrect shebang at the top. If its a bash script then add executable: /bin/bash and try again, or check your script.

Cheers.

6

The bash was just a trial, the is the script that I really care about running which runs perfectly from the command line -
myScript.yml

  • name: Shell script test
    hosts: all
    tasks:

  • name: Run a shell command
    ansible.builtin.shell: power_consumption.sh
    register: foo_result
    args:
    chdir: /usr/src
    ignore_errors: true

  • name: Run a script
    ansible.builtin.script:
    cmd: /usr/src/power_consumption.sh
    ignore_errors: true

  • name: Run a script in another way
    ansible.builtin.script: /usr/src/power_consumption.sh
    ignore_errors: true

  • name: Run a script via command line
    ansible.builtin.command: ./power_consumption.sh
    args:
    chdir: /usr/src
    ignore_errors: true

- name: Run a script second way

ansible.builtin.script:

cmd: /usr/src/power_consumption.sh

  • name: Run a shell command using output of the previous task
    ansible.builtin.shell: /usr/src/bar.sh
    when: foo_result.rc == 5

The contents of the power_consumption.sh script are -

hostfqdn=$(hostname --fqdn)
time=1
declare T0=($(cat /sys/class/powercap/intel-rapl//energy_uj)); sleep $time; declare T1=($(cat /sys/class/powercap/intel-rapl//energy_uj))
for i in “${!T0[@]}”; do echo - | awk “{printf "%.1f W", $((${T1[i]}-${T0[i]})) / $time / 1e6 }” >> $hostfqdn.txt ; done

I have no idea what I am doing wrong, I have tried to put the script in /usr/bin as well but same result for all tasks -

TASK [Run a script via command line] *

The full traceback is:
File “/tmp/ansible_ansible.legacy.command_payload_p_z2bc7h/ansible_ansible.legacy.command_payload.zip/ansible/module_utils/basic.py”, line 2050, in run_command
cmd = subprocess.Popen(args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3.11/subprocess.py”, line 1024, in init
self._execute_child(args, executable, preexec_fn, close_fds,
File “/usr/lib/python3.11/subprocess.py”, line 1901, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
fatal: [100.91.187.42]: FAILED! => {
“changed”: false,
“cmd”: “./power_consumption.sh”,
“invocation”: {
“module_args”: {
“_raw_params”: “./power_consumption.sh”,
“_uses_shell”: false,
“argv”: null,
“chdir”: “/usr/src”,
“creates”: null,
“executable”: null,
“removes”: null,
“stdin”: null,
“stdin_add_newline”: true,
“strip_empty_ends”: true
}
},
“msg”: “[Errno 2] No such file or directory: b’./power_consumption.sh’”,
“rc”: 2,
“stderr”: “”,
“stderr_lines”: ,
“stdout”: “”,
“stdout_lines”:
}

TASK [Run a script in another way] and TASK [Run a script]

The full traceback is:
NoneType: None
fatal: [100.91.187.42]: FAILED! => {
“changed”: true,
“msg”: “non-zero return code”,
“rc”: 2,
“stderr”: “Shared connection to 100.91.187.42 closed.\r\n”,
“stderr_lines”: [
“Shared connection to 100.91.187.42 closed.”
],
“stdout”: “/root/.ansible/tmp/ansible-tmp-1724235551.658032-3341659-128056030829200/power_consumption.sh: 3: Syntax error: "(" unexpected\r\n”,
“stdout_lines”: [
“/root/.ansible/tmp/ansible-tmp-1724235551.658032-3341659-128056030829200/power_consumption.sh: 3: Syntax error: "(" unexpected”
]
}

TASK [Run a shell command

fatal: [100.91.187.42]: FAILED! => {
“changed”: true,
“cmd”: “power_consumption.sh”,
“delta”: “0:00:00.001867”,
“end”: “2024-08-21 10:19:11.554061”,
“invocation”: {
“module_args”: {
“_raw_params”: “power_consumption.sh”,
“_uses_shell”: true,
“argv”: null,
“chdir”: “/usr/src”,
“creates”: null,
“executable”: null,
“removes”: null,
“stdin”: null,
“stdin_add_newline”: true,
“strip_empty_ends”: true
}
},
“msg”: “non-zero return code”,
“rc”: 127,
“start”: “2024-08-21 10:19:11.552194”,
“stderr”: “/bin/sh: 1: power_consumption.sh: not found”,
“stderr_lines”: [
“/bin/sh: 1: power_consumption.sh: not found”
],
“stdout”: “”,
“stdout_lines”:
}

7

Hi,

Your bash script must in include ‘#!/bin/bash’ to allow for its execution using bash hence the suggestion to add the executable verb to prove this was the case.

Regards

8

Yes yes I understand what you mean, and it does work if I add #!/bin/bash’ at the beginning of my foo.sh

contents of foo.sh -
#!/bin/bash
echo “Hello world”

However my power consumption script fails. Any idea what I am doing wrong there?

Many thanks for your help!

-Yogita.

9

Yes, but your power consumption script ALSO needs to have the correct shebang.

10

I see, ok let me try that! , it runs via cli without it so that is why I hadn’t added it. I will try that, thanks guys!

11

Yogita,

Do us a favor please and change this:

ansible.builtin.command: ./power_consumption.sh

to this:

ansible.builtin.command: stat ./power_consumption.sh

and let us see the results. Thanks.

12

Ok thanks Todd.

Also now I am getting a different error, after I cleaned up the yml to keep only 1 task -

FAILED! => {
“ansible_facts”: {
“discovered_interpreter_python”: “/usr/bin/python3”
},
“changed”: true,
“cmd”: [
“stat”,
“./usr/src/power_consumption.sh”
],
“delta”: “0:00:00.002128”,
“end”: “2024-08-21 16:53:50.376199”,
“invocation”: {
“module_args”: {
“_raw_params”: “stat ./usr/src/power_consumption.sh”,
“_uses_shell”: false,
“argv”: null,
“chdir”: null,
“creates”: null,
“executable”: null,
“removes”: null,
“stdin”: null,
“stdin_add_newline”: true,
“strip_empty_ends”: true
}
},
“msg”: “non-zero return code”,
“rc”: 1,
“start”: “2024-08-21 16:53:50.374071”,
“stderr”: “stat: cannot statx ‘./usr/src/power_consumption.sh’: No such file or directory”,
“stderr_lines”: [
“stat: cannot statx ‘./usr/src/power_consumption.sh’: No such file or directory”
],
“stdout”: “”,
“stdout_lines”:
}

Content of my yml are -

  • name: Shell script test
    hosts: all
    gather_facts: false
    tasks:

  • name: Run a script in another way
    ansible.builtin.command: stat ./usr/src/power_consumption.sh
    ignore_errors: true

File does exist in the folder /usr/src on the controller node and the ansible host on which I am trying to execute the script both -

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Contents of yml are -

13

This worked for me …hooray!!! Many thanks everyone for all your inputs and support!!!

  • name: Shell script test
    hosts: all
    gather_facts: false
    tasks:

  • name: Start application
    shell: “/usr/src/power_consumption.sh”
    args:
    chdir: “/usr/src”
    executable: “/bin/bash”

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14

The “stat” failed because you have a “.” in front of “/usr/src/power_consumption.sh”.

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15

Ah ok thanks for letting me know, will fix that.

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