add cmdline as an process tag

[yumaojun03]

Feature Request

add cmdline as process tag, when grafana can use it like (tag(cmdline))

Proposal:

the process cmdline information can find in proc's cmdline file, can extract it

Current behavior:

I use pattern to match my java process, here i have 5 java, use process_name can't distinguish them, but the procs has cmdline can. like

[root@event01 ~]# cat /proc/14441/cmdline
/root/software/jdk1.8.0_171/bin/java-jar/opt/jwb/iot-etl/iot-etl.jar

[root@event01 ~]# telegraf --config /etc/telegraf/telegraf.conf --input-filter procstat --test
> procstat,host=event01,pattern=iot,process_name=java ...
> procstat,host=event01,pattern=iot,process_name=java ...
> procstat,host=event01,pattern=iot,process_name=java ...

Desired behavior:

I want to use cmdline as an tag to distinguish them

Use case: [Why is this important (helps with prioritizing requests)]

if process use vm to run like (java, python, nodejs, ...) has this problem

[danielnelson]

Thanks for the feature request, we have an existing issue here: #1873.