ziyou434 opened a new issue #3002:
URL: https://github.com/apache/apisix/issues/3002
### Issue description
I want to use flamegraph analysis my plugin.
I use perf do it, and i get the root of container.
```
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 16:07 ? 00:00:00 sh -c /usr/bin/apisix init
&& /usr/bin/apisix init_etcd && /usr/l
root 36 1 0 16:07 ? 00:00:00 nginx: master process
/usr/local/openresty/bin/openresty -p /usr/
nobody 37 36 0 16:07 ? 00:00:00 nginx: worker process
nobody 38 36 0 16:07 ? 00:00:00 nginx: worker process
nobody 39 36 0 16:07 ? 00:00:00 nginx: cache manager process
root 41 36 0 16:07 ? 00:00:00 nginx: privileged agent
process
root 42 0 0 16:08 pts/0 00:00:00 /bin/sh -c
TERM=xterm-256color; export TERM; [ -x /bin/bash ] &&
root 48 42 0 16:08 pts/0 00:00:00 /bin/sh -c
TERM=xterm-256color; export TERM; [ -x /bin/bash ] &&
root 49 48 0 16:08 pts/0 00:00:00 /usr/bin/script -q -c
/bin/bash /dev/null
root 51 49 0 16:08 pts/0 00:00:00 /usr/bin/script -q -c
/bin/bash /dev/null
root 52 51 0 16:08 pts/1 00:00:00 /bin/bash
root 122 52 0 16:16 pts/1 00:00:00 ps -ef
```
```
[root@apisix2-6ffbbd4bff-5b2fq apisix]# perf record -F 99 -p 36 -g -- sleep 5
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.009 MB perf.data ]
[root@apisix2-6ffbbd4bff-5b2fq apisix]# perf record -F 99 -p 37 -g -- sleep 5
Error:
You may not have permission to collect stats.
Consider tweaking /proc/sys/kernel/perf_event_paranoid,
which controls use of the performance events system by
unprivileged users (without CAP_SYS_ADMIN).
The current value is 2:
-1: Allow use of (almost) all events by all users
Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK
>= 0: Disallow ftrace function tracepoint by users without CAP_SYS_ADMIN
Disallow raw tracepoint access by users without CAP_SYS_ADMIN
>= 1: Disallow CPU event access by users without CAP_SYS_ADMIN
>= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN
To make this setting permanent, edit /etc/sysctl.conf too, e.g.:
kernel.perf_event_paranoid = -1
```
```
[root@apisix2-6ffbbd4bff-5b2fq apisix]# sysctl -w
kernel.perf_event_paranoid=-1
sysctl: setting key "kernel.perf_event_paranoid": Read-only file system
```
I have got the root authority, why I can't perf the process whose uid is
nobody.
can you give me some help?
### Environment
* apisix version (cmd: `apisix version`): 2.0
* OS: centos
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