Add/update sudo configuration to all collectors with 'use_sudo'

collectors/gpfsMetric.md

@@ -81,3 +81,16 @@ Metrics:
 * `gpfs_metaops_rate` (if `send_total_values == true` and `send_derived_values == true`)
 
 The collector adds a `filesystem` tag to all metrics
+
+`mmpmon` typically require root to run.
+In order to run `cc-metric-collector` without root priviliges, you can enable `use_sudo`.
+Add a file like this in `/etc/sudoers.d/` to allow `cc-metric-collector` to run the required command:
+
+```
+# Do not log the following sudo commands from monitoring, since this causes a lot of log spam.
+# However keep log_denied enabled, to detect failures
+Defaults: monitoring !log_allowed, !pam_session
+
+# Allow to use mmpmon
+monitoring ALL = (root) NOPASSWD:/absolute/path/to/mmpmon -p -s
+```