How to check what the recipe is executing on my Linux VS?

Question

How to check what the recipe is executing on my Linux VS?

Answer

When executing recipes on a Linux based VS, we can check what commands are being executed or where the recipe has stuck by doing the following:

Identify the PID of the father process that started to executed the recipe and watch that PID.

1. Recipes always run under a session run by root and with no tty. In order to identify the PID of the father process for our recipe, find that process under your processes list:

[root@cpinstall ~]# ps aux | grep notty
root       887  0.0  0.1  97944  2992 ?        Ss   12:51   0:00 sshd: root@notty 
root     12964  0.0  0.0 103240   872 pts/0    R+   13:11   0:00 grep notty

 2. Once identified, watch the process using pstree. This will create a dynamic view of the process:

[root@cpinstall] watch -n1 "pstree -H  887"


init─┬─auditd───{auditd}
     ├─crond
     ├─master─┬─pickup
     │        └─qmgr
     ├─6*[mingetty]
     ├─mysqld_safe───mysqld───10*[{mysqld}]
     ├─ntpd
     ├─rsyslogd───3*[{rsyslogd}]
     ├─snmpd
     ├─sshd───bash───pstree
     ├─sshd───bash───bash───onapp-cp-instal─┬─tee
     │                                      └─yum───sh───rake───{rake}
     ├─sshd
     └─udevd

As we can see,your process is executing sh───rake───{rake}, rake it's being executed. If you go back to your recipe, check the full command. Here is the one we were executing:

rake onapp:password[admin,root_password]

The correct command should have been:

rake onapp:password[admin,$root_password]

This is why the process was stuck.