Werk #6048: docker_node_info.containers: Fixed crash when daemon is not running

ComponentChecks & Agents
Titledocker_node_info.containers: Fixed crash when daemon is not running
Date2018-04-29 19:56:35
Check_MK EditionCheck_MK Raw Edition (CRE)
Check_MK Version1.6.0i1,1.5.0b3
LevelTrivial Change
ClassBug Fix
CompatibilityCompatible - no manual interaction needed