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kata-containers / tests

Kata Containers tests, CI, and metrics
https://katacontainers.io/
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iperf3 issue with ftruncate #570

Closed chandrabvv closed 5 years ago

chandrabvv commented 6 years ago

Clear container had issue with ftruncate and is not able to run iperf3. https://github.com/intel/cc-oci-runtime/issues/152 Is this issue resolved in Kata containers? I am still not able to tun iperf3 using docker image http://networkstatic.net/measuring-network-bandwidth-using-iperf-and-docker/

devimc commented 6 years ago

a workaround would be to use devicemapper as storage driver https://docs.docker.com/storage/storagedriver/device-mapper-driver/

grahamwhaley commented 6 years ago

Hi @chandrabvv The issue still exists afaik - it is to do with referencing unlinked files, and handling by 9pfs. As @devimc says, if you use devicemapper and kata's block device mount mode for the workload, then the issue does not manifest as that will not use 9p. Alternatively, we have a workaround in our iperf3 tests that moves the TMPDIR to a RAM based filesystem. You can see the current fix at: https://github.com/kata-containers/tests/blob/master/metrics/network/network-metrics-iperf3.sh#L41

chandrabvv commented 6 years ago

@grahamwhaley @devimc Thanks for clarification.

GabyCT commented 5 years ago

Closing this issue as a solution was provided of how to run iperf3