Hi Jay,
We just added health check support for docker tasks that's in master but not
yet released. It will run docker exec with the command you provided as health
checks.
It should be in the next release.
Thanks!
Tim
> On Oct 6, 2015, at 6:49 PM, Jay Taylor <outtat...@gmail.com> wrote:
>
> Does Mesos support health checks for docker image tasks? Mesos seems to be
> ignoring the TaskInfo.HealthCheck field for me.
>
> Example TaskInfo JSON received back from Mesos:
>
>>> {
>>> "name":"hello-app.web.v3",
>>> "task_id":{
>>> "value":"hello-app_web-v3.fc05a1a5-1e06-4e61-9879-be0d97cd3eec"
>>> },
>>> "slave_id":{
>>> "value":"20150924-210922-1608624320-5050-1792-S1"
>>> },
>>> "resources":[
>>> {
>>> "name":"cpus",
>>> "type":0,
>>> "scalar":{
>>> "value":0.1
>>> }
>>> },
>>> {
>>> "name":"mem",
>>> "type":0,
>>> "scalar":{
>>> "value":256
>>> }
>>> },
>>> {
>>> "name":"ports",
>>> "type":1,
>>> "ranges":{
>>> "range":[
>>> {
>>> "begin":31002,
>>> "end":31002
>>> }
>>> ]
>>> }
>>> }
>>> ],
>>> "command":{
>>> "container":{
>>> "image":"docker-services1a:5000/test/app-81-1-hello-app-103"
>>> },
>>> "shell":false
>>> },
>>> "container":{
>>> "type":1,
>>> "docker":{
>>> "image":"docker-services1a:5000/gig1/app-81-1-hello-app-103",
>>> "network":2,
>>> "port_mappings":[
>>> {
>>> "host_port":31002,
>>> "container_port":8000,
>>> "protocol":"tcp"
>>> }
>>> ],
>>> "privileged":false,
>>> "parameters":[],
>>> "force_pull_image":false
>>> }
>>> },
>>> "health_check":{
>>> "delay_seconds":5,
>>> "interval_seconds":10,
>>> "timeout_seconds":10,
>>> "consecutive_failures":3,
>>> "grace_period_seconds":0,
>>> "command":{
>>> "shell":true,
>>> "value":"sleep 5",
>>> "user":"root"
>>> }
>>> }
>>> }
>
> I have searched all machines and containers to see if they ever run the
> command (in this case `sleep 5`), but have not found any indication that it
> is being executed.
>
> In the mesos src code the health-checks are invoked from
> src/launcher/executor.cpp CommandExecutorProcess::launchTask. Does this mean
> that health-checks are only supported for custom executors and not for docker
> tasks?
>
> What I am trying to accomplish is to have the 0/non-zero exit-status of a
> health-check command translate to task health.
>
> Thanks!
> Jay
