Justin Pinkul created MESOS-6143:
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Summary: resolv.conf is not copied when using the Mesos
containerizer with a Docker image
Key: MESOS-6143
URL: https://issues.apache.org/jira/browse/MESOS-6143
Project: Mesos
Issue Type: Bug
Components: containerization, isolation
Affects Versions: 1.0.0
Environment: OS: Debian Jessie
Mesos version: 1.0.0
Reporter: Justin Pinkul
When using the Mesos containierizer, host networking and a Docker image
{{resolv.conf}} is not copied from the host. The only piece of Mesos code that
copies these file is currently in the {{network/cni}} isolator so I tried
turning this on, by setting
{{isolation=network/cni,namespaces/pid,docker/runtime,cgroups/devices,gpu/nvidia,cgroups/cpu,disk/du,filesystem/linux}},
but the issue still remained. I suspect this might be related to not setting
{{network_cni_config_dir}} and {{network_cni_plugins_dir}} but it seems
incorrect that these flags would be required to use host networking.
Here is how I am able to reproduce this issue:
{code}
mesos-execute --master=mesosmaster1:5050 \
--name=dns-test \
--docker_image=my-docker-image:1.1.3 \
--command="bash -c 'ping google.com; while ((1)); do date;
sleep 10; done'"
# Find the PID of mesos-executor's child process and enter it
nsenter -m -u -i -n -p -r -w -t $PID
# This file will be empty
cat /etc/resolv.conf
{code}
{code:title=Mesos agent log}
I0908 17:39:24.599149 181564 slave.cpp:1688] Launching task dns-test for
framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006
I0908 17:39:24.599567 181564 paths.cpp:528] Trying to chown
'/mnt/01/mesos_work/slaves/67025326-9dfd-4cbb-a008-454a40bce2f5-S2/frameworks/51831498-0902-4ae9-a1ff-4396f8b8d823-0006/executors/dns-test/runs/52bdce71-04b0-4440-bb71-cb826f0635c6'
to user 'root'
I0908 17:39:24.603970 181564 slave.cpp:5748] Launching executor dns-test of
framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006 with resources cpus(*):0.1;
mem(*):32 in work directory
'/mnt/01/mesos_work/slaves/67025326-9dfd-4cbb-a008-454a40bce2f5-S2/frameworks/51831498-0902-4ae9-a1ff-4396f8b8d823-0006/executors/dns-test/runs/52bdce71-04b0-4440-bb71-cb826f0635c6'
I0908 17:39:24.604178 181564 slave.cpp:1914] Queuing task 'dns-test' for
executor 'dns-test' of framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006
I0908 17:39:24.604284 181571 docker.cpp:1020] Skipping non-docker container
I0908 17:39:24.604532 181578 containerizer.cpp:781] Starting container
'52bdce71-04b0-4440-bb71-cb826f0635c6' for executor 'dns-test' of framework
'51831498-0902-4ae9-a1ff-4396f8b8d823-0006'
I0908 17:39:24.606972 181571 provisioner.cpp:294] Provisioning image rootfs
'/mnt/01/mesos_work/provisioner/containers/52bdce71-04b0-4440-bb71-cb826f0635c6/backends/copy/rootfses/db97ba50-c9f0-45e7-8a39-871e4038abf9'
for container 52bdce71-04b0-4440-bb71-cb826f0635c6
I0908 17:39:30.037472 181564 cpushare.cpp:389] Updated 'cpu.shares' to 102
(cpus 0.1) for container 52bdce71-04b0-4440-bb71-cb826f0635c6
I0908 17:39:30.038415 181560 linux_launcher.cpp:281] Cloning child process with
flags = CLONE_NEWNS | CLONE_NEWPID
I0908 17:39:30.040742 181560 systemd.cpp:96] Assigned child process '190563' to
'mesos_executors.slice'
I0908 17:39:30.161613 181576 slave.cpp:2902] Got registration for executor
'dns-test' of framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006 from
executor(1)@10.191.4.65:43707
I0908 17:39:30.162148 181563 disk.cpp:171] Updating the disk resources for
container 52bdce71-04b0-4440-bb71-cb826f0635c6 to cpus(*):0.1; mem(*):32;
gpus(*):2
I0908 17:39:30.162648 181566 cpushare.cpp:389] Updated 'cpu.shares' to 102
(cpus 0.1) for container 52bdce71-04b0-4440-bb71-cb826f0635c6
I0908 17:39:30.162822 181574 slave.cpp:2079] Sending queued task 'dns-test' to
executor 'dns-test' of framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006 at
executor(1)@10.191.4.65:43707
I0908 17:39:30.168383 181570 slave.cpp:3285] Handling status update
TASK_RUNNING (UUID: 319e0235-01b9-42ce-a2f8-ed9fc33de150) for task dns-test of
framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006 from
executor(1)@10.191.4.65:43707
I0908 17:39:30.169019 181577 status_update_manager.cpp:320] Received status
update TASK_RUNNING (UUID: 319e0235-01b9-42ce-a2f8-ed9fc33de150) for task
dns-test of framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006
I0908 17:39:30.169173 181576 slave.cpp:3678] Forwarding the update TASK_RUNNING
(UUID: 319e0235-01b9-42ce-a2f8-ed9fc33de150) for task dns-test of framework
51831498-0902-4ae9-a1ff-4396f8b8d823-0006 to master@10.191.248.194:5050
I0908 17:39:30.169242 181576 slave.cpp:3588] Sending acknowledgement for status
update TASK_RUNNING (UUID: 319e0235-01b9-42ce-a2f8-ed9fc33de150) for task
dns-test of framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006 to
executor(1)@10.191.4.65:43707
I0908 17:39:30.171314 181565 status_update_manager.cpp:392] Received status
update acknowledgement (UUID: 319e0235-01b9-42ce-a2f8-ed9fc33de150) for task
dns-test of framework 51831498-0902-4ae9-a1ff-4396f8b8d823-0006
{code}
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