Cherry-pick to 5.3: Fix docker hanging when container killed #3629
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No timeout was passed to the docker client. It seems in case of a killed container it can happen that the connection is hanging. To interrupt this connection, the timeout from the metricset is passed to the client. That means in case info for a container cannot be fetched, it will timeout. This change requires that the docker module is not run with a timeout of 3s seconds, which indirectly means a period of 3s. The reason is that already the http request waits ~2s for the response. So if 1s is set as timeout, all requests will timeout. Further changes: * Containers without names will be ignored, as these are containers for which the data could not be fetched. * Period was set to 1s by default instead of the period as document. This was changed. * Add documentation node about minimal period. Closes elastic#3610 The issue with this PR was introduce in 5.2.1 by fixing the memory leak. Before go routines just piled up, but now they caused filebeat to hang. This needs also backport to 5.2.2 (cherry picked from commit 99f17d6)
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Cherry-pick of PR #3612 to 5.3 branch. Original message:
No timeout was passed to the docker client. It seems in case of a killed container it can happen that the connection is hanging. To interrupt this connection, the timeout from the metricset is passed to the client. That means in case info for a container cannot be fetched, it will timeout.
This change requires that the docker module is not run with a timeout of 3s seconds, which indirectly means a period of 3s. The reason is that already the http request waits ~2s for the response. So if 1s is set as timeout, all requests will timeout.
Further changes:
Closes #3610
The issue with this PR was introduce in 5.2.1 by fixing the memory leak. Before go routines just piled up, but now they caused filebeat to hang.
This needs also backport to 5.2.2