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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/65713/
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(Updated March 2, 2018, 3:15 p.m.)
Review request for mesos, Alexander Rukletsov, Gilbert Song, Greg Mann, and
Vinod Kone.
Bugs: MESOS-8574
https://issues.apache.org/jira/browse/MESOS-8574
Repository: mesos
Description
-------
Previosly, if `docker inspect` command hanged, the docker container
ended up in an unkillable state. This patch adds a timeout for inspect
command after receiving `killTask` analogically to `reaped` handler.
In addition we've added a timeout for `docker stop` command. If docker
`stop` or `inspect` command times out, we discard the related future,
thus the docker library kills previously spawned docker cli subprocess.
As a result, a scheduler can retry `killTask` operation to handle
nasty docker bugs that lead to hanging docker cli.
Diffs (updated)
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src/docker/executor.cpp 93c3e1d1e86814e34cbe5b045f6e61911266c535
Diff: https://reviews.apache.org/r/65713/diff/6/
Changes: https://reviews.apache.org/r/65713/diff/5-6/
Testing
-------
internal CI
Manual testing:
1. Build docker from sources:
http://oyvindsk.com/writing/docker-build-from-source
2. Modify `ContainerInspect` function from `docker/inspect.go`:
```
func (daemon *Daemon) ContainerInspect(name string, size bool, version string)
(interface{}, error) {
+ time.Sleep(10 * time.Second)
```
3. Modify `ContainerStop` function from `docker/stop.go`:
```
func (daemon *Daemon) ContainerStop(name string, seconds *int) error {
+ rand.Seed(time.Now().UTC().UnixNano())
+ if rand.Intn(2) == 0 {
+ time.Sleep(20 * time.Second)
+ }
```
4. Rebuild docker: `sudo make build && sudo make binary`
5. Stop system docker daemon: `sudo service docker stop`
6. Start modified docker daemon: `sudo ./bundles/binary-daemon/dockerd-dev`
7. Modify `src/cli/execute.cpp`:
a) Add `delay(Seconds(15), self(), &Self::retryKill, task->task_id(),
offer.agent_id());` after
https://github.com/apache/mesos/blob/072ea2787ffca6f2a6dcb2d636f68c51823d6665/src/cli/execute.cpp#L606
b) Add a new method `retryKill` to `CommandScheduler`:
```
void retryKill(const TaskID& taskId, const AgentID& agentId)
{
killTask(taskId, agentId);
delay(Seconds(6), self(), &Self::retryKill, taskId, agentId);
}
```
8. Rebuild mesos
9. Run mesos master: `./bin/mesos-master.sh --work_dir='var/master-1'`
10. Run mesos agent: `GLOG_v=1 ./bin/mesos-agent.sh
--resources="cpus:10000;mem:1000000"
--work_dir='/home/abudnik/mesos/build/var/agent-1'
--containerizers="docker,mesos" --master="127.0.1.1:5050"`
11. Submit a task for the docker executor: `./src/mesos-execute
--master="127.0.1.1:5050" --name="a" --containerizer=docker
--docker_image="ubuntu:xenial" --command="sleep 9999"`
Thanks,
Andrei Budnik
