Makes sense to add the component name.
{conatiner_id: {
*"componentname":"name of the component",*
"hostname":"name of the host",
"agent_log": "folder path to agent log",
"app_log": "folder path to app log" }}
These are local paths on the host and hence are transient. We can also add
the location in HDFS if thats available.
/ws/v1/slider/diagnostics/container_id seems fine as long as
/ws/v1/slider/diagnostics
can list all the containers.
Not sure if we need to make it available at root. Might be too busy.
-Sumit
On Tue, May 13, 2014 at 1:27 PM, Jon Maron <[email protected]> wrote:
>
> On May 13, 2014, at 3:58 PM, Sumit Mohanty <[email protected]>
> wrote:
>
> > For each container being activated, the slider agent knows the log
> > location. If the component instance (within the container) fails to
> > activate properly or goes down then the user may need access to the log
> > locations for debugging. *This assumes that appropriate yarn config is in
> > place to have the log files hang around for a while.*
> >
> > What do you think about the capability to have the agent report back
> these
> > information (log locations etc.) and have them published. There needs to
> be
> > a limit on how long the information should be available as number of
> failed
> > containers may grow over time. An obvious limit could be the yarn
> > configuration of how long the logs are saved on the host.
> >
> > Should we publish them as:
> >
> > {conatiner_id: {
> > "hostname":"name of the host",
> > "agent_log": "folder path to agent log",
> > "app_log": "folder path to app log" }}
>
> - would probably help to add “component:” or “role:” property to ease
> correlation with the given component
> - are the paths in HDFS or do they reference an exposed endpoint that
> allows for the download of the logs (e.g. http://host:port
> /ws/v1/slider/diagnostics/someLogName)?
>
> >
> > We can add more diagnostics information as needed.
> >
> > Any suggestion on a good location to publish this?
>
> Perhaps a root resource that lists the information for the cluster is
> where you’d start: /ws/v1/slider/diagnostics. Individual entries (with
> perhaps more detail) could be retrieved as
> /ws/v1/slider/diagnostics/container_id (these hrefs should probably be
> available as properties in the root resource)
>
> >
> > -Sumit
> >
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