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
##########
File path: hadoop-ozone/dist/src/main/compose/ozone/docker-compose.yaml
##########
@@ -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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