On 12/1/20 10:54 AM, magnifito wrote: > Hello, > I am an Ansible beginner. I am trying to start Python script in pm2 process > manager on my computers. > I think I have narrowed the problem to Ansible not knowing proper home > directory. > Become, become_user, changing environment path in config or playbook does not > solve the problem. > > whoami returns my remote user, with become it returns root, while "echo > $HOME" gives me /home/my_pc_user instead > /home/remote_user >
1. Lookups always take place on the Ansible controller
2. Use command module instead of shell unless you have a very good reason to
not use command
3. FileNotFoundError: [Errno 2] No such file or directory: 'iwconfig':
'iwconfig'
iwconfig is in /usr/sbin, so that is probably missing in the $PATH Ansible
uses (different from a regular ssh shell)
Regards
Racke
> *Here is my playbook:*
> ---
> - hosts: tv
> become_user: tester
> become: yes
> environment:
> HOME: /home/tester
> tasks:
> - name: Home debug
> debug:
> msg: "'{{ lookup('env', 'HOME') }}' is the HOME enviroment variable."
> - name: User debug
> debug:
> msg: "'{{ lookup('env', 'USR') | default('nobody', True) }}' is the
> USER."
> - name: Start wlan monitor in pm2
> shell: /home/tester/.npm-global/bin/pm2 start
> /home/tester/ops-tests/bin/wireless_monitor.py --name wireless_monitor
> --interpreter=python3 -- -i 3 -p /home/tester/wireless.log
>
> *Which returns:*
> data@pc:~/tester$ ansible-playbook pm2_wlan_monitor_start.yml -K
> BECOME password:
>
> PLAY [tv]
> **********************************************************************
>
> TASK [Gathering Facts]
> *********************************************************
> ok: [10.10.20.254]
>
> TASK [Home debug]
> **************************************************************
> ok: [10.10.20.254] => {
> "msg": "'/home/data' is the HOME enviroment variable."
> }
>
> TASK [User debug]
> **************************************************************
> ok: [10.10.20.254] => {
> "msg": "'nobody' is the USER."
> }
>
> TASK [Start wlan monitor in pm2]
> ***********************************************
> changed: [10.10.20.254]
>
> PLAY RECAP
> *********************************************************************
> 10.10.20.254 : ok=4 changed=1 unreachable=0 failed=0
> skipped=0 rescued=0 ignored=0
>
> *Pm2 monitor will start process only to stop it with errors. Here is the Pm2
> log:*
> M2 | 2020-11-30T12:21:52: PM2 log: App [wireless_monitor:0] starting
> in -fork mode-
> PM2 | 2020-11-30T12:21:52: PM2 log: App [wireless_monitor:0] online
> PM2 | 2020-11-30T12:21:52: PM2 log: App [wireless_monitor:0] exited
> with code [1] via signal [SIGINT]
> PM2 | 2020-11-30T12:21:52: PM2 log: Script
> /home/tester/ops-tests/bin/wireless_monitor.py had too many unstable
> restarts (16). Stopped. "errored"
>
> /home/tester/.pm2/logs/wireless-monitor-out.log last 15 lines:
> /home/tester/.pm2/logs/wireless-monitor-error.log last 15 lines:
> 0|wireless | File "/home/tester/ops-tests/bin/common.py", line 83, in check
> 0|wireless | return self.make_result(self.get_value())
> 0|wireless | File "/home/tester/ops-tests/bin/wireless_monitor.py", line
> 47, in get_signal_level
> 0|wireless | w_info = get_wireles_info(_customer="get_signal_level")
> 0|wireless | File "/home/tester/ops-tests/bin/common.py", line 61, in
> wrapper
> 0|wireless | return_value = func(*args, **kwargs)
> 0|wireless | File "/home/tester/ops-tests/bin/wireless_monitor.py", line
> 21, in get_wireles_info
> 0|wireless | output = sp.run(["iwconfig"], stdout=sp.PIPE,
> stderr=sp.PIPE, universal_newlines=True)
> 0|wireless | File "/usr/lib/python3.7/subprocess.py", line 472, in run
> 0|wireless | with Popen(*popenargs, **kwargs) as process:
> 0|wireless | File "/usr/lib/python3.7/subprocess.py", line 775, in __init__
> 0|wireless | restore_signals, start_new_session)
> 0|wireless | File "/usr/lib/python3.7/subprocess.py", line 1522, in
> _execute_child
> 0|wireless | raise child_exception_type(errno_num, err_msg, err_filename)
> 0|wireless | FileNotFoundError: [Errno 2] No such file or directory:
> 'iwconfig': 'iwconfig'
>
> When I SSH into my remote PC and use the same shell command the script starts
> in pm2 with no problems. I do not have to
> use full path to start pm2 which turned out is required to start it via
> Ansible playbook or ad-hoc command. Currently
> the process exits without making "wireless.log" file.
>
> Any help or information would be appreciated as I could not find the solution.
>
> Best regards,
> Greg
>
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