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authorJosep Puigdemont <josep.puigdemont@enea.com>2016-05-06 03:28:26 +0200
committerJosep Puigdemont <josep.puigdemont@gmail.com>2016-06-15 14:42:19 +0000
commit874ca3f24d349ee844bb7339dda34eddb2e91c73 (patch)
tree944a5e9127817bbb9b5d65521311b5297fe611b5 /deploy/templates
parentf9e8c1a361d3673df9fcde83e46d265ed49fa499 (diff)
common.py: allow specifying number of attempts in exec_cmd
Some commands executed by exec_cmd may fail because of a temporary cause, and it may be desirable to retry the same command several times until it succeeds. One example of this are the ipmitool commands, which may fail temorarily on some targets if they get too many requests simultaneously. In this patch three new optional parameters are introduced to the function signature, which do not break backward compatibility: attempts: which indicates how many times the command should be run if it returns a non-zero value*, and defaults to 1 (as today). delay: which indicates the delay in seconds between attempts, and defaults to 5 seconds. verbose: It will print the remaining attempts left for the current command if set to True. * It may be desirable to add yet another parameter to indicate what return value should be considered an error, but non-zero for now seems a reasonable default. Signed-off-by: Josep Puigdemont <josep.puigdemont@enea.com>
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