in_node_exporter_metrics: Add description for processes metrics (#1184)

* in_node_exporter_metrics: Add description for processes metrics

Signed-off-by: Hiroshi Hatake <hatake@calyptia.com>

* node_exporter_metrics: Update the included version to v2.2.0

Signed-off-by: Hiroshi Hatake <hatake@calyptia.com>

* in_node_exporter_metrics: Add mention for "system level"

Signed-off-by: Hiroshi Hatake <hatake@calyptia.com>

---------

Signed-off-by: Hiroshi Hatake <hatake@calyptia.com>

pipeline/inputs/node-exporter-metrics.md

@@ -36,6 +36,7 @@ The table below indicates which collector is supported on macOS.
 | collector.thermal_zone.scrape\_interval   | The rate in seconds at which thermal_zone metrics are collected from the host operating system. If a value greater than 0 is used then it overrides the global default otherwise the global default is used. | 0 seconds |
 | collector.filefd.scrape\_interval   | The rate in seconds at which filefd metrics are collected from the host operating system. If a value greater than 0 is used then it overrides the global default otherwise the global default is used. | 0 seconds |
 | collector.nvme.scrape\_interval | The rate in seconds at which nvme metrics are collected from the host operating system. If a value greater than 0 is used then it overrides the global default otherwise the global default is used. | 0 seconds |
+| collector.processes.scrape\_interval | The rate in seconds at which system level of process metrics are collected from the host operating system. If a value greater than 0 is used then it overrides the global default otherwise the global default is used. | 0 seconds |
 | metrics | To specify which metrics are collected from the host operating system. These metrics depend on `/proc` or `/sys` fs. The actual values of metrics will be read from `/proc` or `/sys` when needed. cpu, cpufreq, meminfo, diskstats, filesystem, stat, loadavg, vmstat, netdev, and filefd depend on procfs. cpufreq metrics depend on sysfs. | `"cpu,cpufreq,meminfo,diskstats,filesystem,uname,stat,time,loadavg,vmstat,netdev,filefd"` |
 | filesystem.ignore\_mount\_point\_regex  | Specify the regex for the mount points to prevent collection of/ignore. | `^/(dev|proc|run/credentials/.+|sys|var/lib/docker/.+|var/lib/containers/storage/.+)($|/)`    |
 | filesystem.ignore\_filesystem\_type\_regex  | Specify the regex for the filesystem types to prevent collection of/ignore. | `^(autofs|binfmt_misc|bpf|cgroup2?|configfs|debugfs|devpts|devtmpfs|fusectl|hugetlbfs|iso9660|mqueue|nsfs|overlay|proc|procfs|pstore|rpc_pipefs|securityfs|selinuxfs|squashfs|sysfs|tracefs)$`    |
@@ -78,6 +79,7 @@ The following table describes the available collectors as part of this plugin. A
 | systemd collector | Exposes statistics from systemd.                                                                 | Linux       | v2.1.3  |
 | thermal_zone      | Expose thermal statistics from `/sys/class/thermal/thermal_zone/*`                               | Linux       | v2.2.1  |
 | nvme              | Exposes nvme statistics from `/proc`.                                                            | Linux       | v2.2.0  |
+| processes         | Exposes processes statistics from `/proc`.                                                       | Linux       | v2.2.0  |
 
 ## Getting Started