Qian Zhang created MESOS-8877:
---------------------------------
Summary: Docker container's resources will be wrongly enlarged in
cgroups after agent recovery
Key: MESOS-8877
URL: https://issues.apache.org/jira/browse/MESOS-8877
Project: Mesos
Issue Type: Bug
Components: docker
Reporter: Qian Zhang
Reproduce steps:
1. Run `mesos-execute --master=10.0.49.2:5050
--task=[file:///home/qzhang/workspace/config/task_docker.json]
--checkpoint=true` to launch a Docker container.
{code:java}
# cat task_docker.json
{
"name": "test",
"task_id": {"value" : "test"},
"agent_id": {"value" : ""},
"resources": [
{"name": "cpus", "type": "SCALAR", "scalar": {"value": 0.1}},
{"name": "mem", "type": "SCALAR", "scalar": {"value": 32}}
],
"command": {
"value": "sleep 55555"
},
"container": {
"type": "DOCKER",
"docker": {
"image": "alpine"
}
}
}
{code}
2. When the Docker container is running, we can see its resources in cgroups
are correctly set, so far so good.
{code:java}
# cat
/sys/fs/cgroup/cpu,cpuacct/docker/a711b3c7b0d91cd6d1c7d8daf45a90ff78d2fd66973e615faca55a717ec6b106/cpu.cfs_quota_us
10000
# cat
/sys/fs/cgroup/memory/docker/a711b3c7b0d91cd6d1c7d8daf45a90ff78d2fd66973e615faca55a717ec6b106/memory.limit_in_bytes
33554432
{code}
3. Restart Mesos agent, and then we will see the resources of the Docker
container will be wrongly enlarged.
{code}
I0503 02:06:17.268340 29512 docker.cpp:1855] Updated 'cpu.shares' to 204 at
/sys/fs/cgroup/cpu,cpuacct/docker/a711b3c7b0d91cd6d1c7d8daf45a90ff78d2fd66973e615faca55a717ec6b106
for container 1b21295b-2f49-4d08-84c7-43b9ae15ad88
I0503 02:06:17.271390 29512 docker.cpp:1882] Updated 'cpu.cfs_period_us' to
100ms and 'cpu.cfs_quota_us' to 20ms (cpus 0.2) for container
1b21295b-2f49-4d08-84c7-43b9ae15ad88
I0503 02:06:17.273082 29512 docker.cpp:1924] Updated
'memory.soft_limit_in_bytes' to 64MB for container
1b21295b-2f49-4d08-84c7-43b9ae15ad88
I0503 02:06:17.275908 29512 docker.cpp:1950] Updated 'memory.limit_in_bytes' to
64MB at
/sys/fs/cgroup/memory/docker/a711b3c7b0d91cd6d1c7d8daf45a90ff78d2fd66973e615faca55a717ec6b106
for container 1b21295b-2f49-4d08-84c7-43b9ae15ad88
# cat
/sys/fs/cgroup/cpu,cpuacct/docker/a711b3c7b0d91cd6d1c7d8daf45a90ff78d2fd66973e615faca55a717ec6b106/cpu.cfs_quota_us
20000
# cat
/sys/fs/cgroup/memory/docker/a711b3c7b0d91cd6d1c7d8daf45a90ff78d2fd66973e615faca55a717ec6b106/memory.limit_in_bytes
67108864
{code}
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