Fix debug logs failing with persistent connection (#33049)

* Fix debug logs failing with persistent connection

Fixes #33047

*  As debug logs are written on stdout, it interrupts
   the communication between ansible-connection(background)
   process and main process. To avoid this add a string similar
   to exactly identify the response string.

*  Remove unwanted code in ansible-connection

*  Fix review comments

* Fix spurious log emitted on ansible-connection stdout issue

*  ansible-connection which runs as a background process sends a
   json string (contains response received from remote device)
   to foreground ansible-playbook process over stdout.

*  If in case debug flag is enabled the connection_loader api
   invoked from ansible-connection `ssh = connection_loader.get('ssh', class_only=True)`
   results in emitting debug logs on stdout. This  spurious log
   interfere with the actual response and results in failure while
   reading json string in ansible-playbook process

* To avoid this save stdout of ansible-connection and redirect it string
  buffer to accumulate all the logs emitted by core API's

* Add these logs in `result['messages']` which is send a json string after reinstating saved stdout

*  Remove unwanted code in ansible-connection

* Fix review comment
This commit is contained in:
Ganesh Nalawade 2018-01-25 02:48:45 +05:30 committed by GitHub
commit 90cd87f950
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4 changed files with 13 additions and 53 deletions

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@ -131,6 +131,8 @@ class Display:
# characters that are invalid in the user's locale
msg2 = to_text(msg2, self._output_encoding(stderr=stderr), errors='replace')
# Note: After Display() class is refactored need to update the log capture
# code in 'bin/ansible-connection' (and other relevant places).
if not stderr:
fileobj = sys.stdout
else: