[GitHub] prasanthj commented on a change in pull request #491: HDDS-1116. Add java profiler servlet to the Ozone web servers

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prasanthj commented on a change in pull request #491: HDDS-1116. Add java profiler servlet to the Ozone web servers
URL: https://github.com/apache/hadoop/pull/491#discussion_r257394453
 
 

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 File path: hadoop-ozone/dist/src/main/compose/ozone/docker-compose.yaml
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 @@ -18,6 +18,7 @@ version: "3"
 services:
    datanode:
       image: apache/hadoop-runner
+      privileged: true #required by the profiler
 
 Review comment:
   This can be avoided with initContainer running in privileged mode that updates the following
   ```
               sudo bash -c 'echo 1 > /proc/sys/kernel/perf_event_paranoid'
               sudo bash -c 'echo 0 > /proc/sys/kernel/kptr_restrict'
   ```
   with this initContainer will apply the required changes and will complete. main container can still run in non-previleged mode. 

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