Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/inputs/passenger/README.md

@@ -0,0 +1,117 @@
+# Passenger Input Plugin
+
+Gather [Phusion Passenger](https://www.phusionpassenger.com/) metrics using the
+`passenger-status` command line utility.
+
+## Series Cardinality Warning
+
+Depending on your environment, this `passenger_process` measurement of this
+plugin can quickly create a high number of series which, when unchecked, can
+cause high load on your database.  You can use the following techniques to
+manage your series cardinality:
+
+- Use the
+  [measurement filtering](https://docs.influxdata.com/telegraf/latest/administration/configuration/#measurement-filtering)
+  options to exclude unneeded tags.  In some environments, you may wish to use
+  `tagexclude` to remove the `pid` and `process_group_id` tags.
+- Write to a database with an appropriate
+  [retention policy](https://docs.influxdata.com/influxdb/latest/guides/downsampling_and_retention/).
+- Consider using the
+  [Time Series Index](https://docs.influxdata.com/influxdb/latest/concepts/time-series-index/).
+- Monitor your databases
+  [series cardinality](https://docs.influxdata.com/influxdb/latest/query_language/spec/#show-cardinality).
+
+## Global configuration options <!-- @/docs/includes/plugin_config.md -->
+
+In addition to the plugin-specific configuration settings, plugins support
+additional global and plugin configuration settings. These settings are used to
+modify metrics, tags, and field or create aliases and configure ordering, etc.
+See the [CONFIGURATION.md][CONFIGURATION.md] for more details.
+
+[CONFIGURATION.md]: ../../../docs/CONFIGURATION.md#plugins
+
+## Configuration
+
+```toml @sample.conf
+# Read metrics of passenger using passenger-status
+[[inputs.passenger]]
+  ## Path of passenger-status.
+  ##
+  ## Plugin gather metric via parsing XML output of passenger-status
+  ## More information about the tool:
+  ##   https://www.phusionpassenger.com/library/admin/apache/overall_status_report.html
+  ##
+  ## If no path is specified, then the plugin simply execute passenger-status
+  ## hopefully it can be found in your PATH
+  command = "passenger-status -v --show=xml"
+```
+
+### Permissions
+
+Telegraf must have permission to execute the `passenger-status` command.  On
+most systems, Telegraf runs as the `telegraf` user.
+
+## Metrics
+
+- passenger
+  - tags:
+    - passenger_version
+  - fields:
+    - process_count
+    - max
+    - capacity_used
+    - get_wait_list_size
+
+- passenger_supergroup
+  - tags:
+    - name
+  - fields:
+    - get_wait_list_size
+    - capacity_used
+
+- passenger_group
+  - tags:
+    - name
+    - app_root
+    - app_type
+  - fields:
+    - get_wait_list_size
+    - capacity_used
+    - processes_being_spawned
+
+- passenger_process
+  - tags:
+    - group_name
+    - app_root
+    - supergroup_name
+    - pid
+    - code_revision
+    - life_status
+    - process_group_id
+  - fields:
+    - concurrency
+    - sessions
+    - busyness
+    - processed
+    - spawner_creation_time
+    - spawn_start_time
+    - spawn_end_time
+    - last_used
+    - uptime
+    - cpu
+    - rss
+    - pss
+    - private_dirty
+    - swap
+    - real_memory
+    - vmsize
+
+## Example Output
+
+```text
+passenger,passenger_version=5.0.17 capacity_used=23i,get_wait_list_size=0i,max=23i,process_count=23i 1452984112799414257
+passenger_supergroup,name=/var/app/current/public capacity_used=23i,get_wait_list_size=0i 1452984112799496977
+passenger_group,app_root=/var/app/current,app_type=rack,name=/var/app/current/public capacity_used=23i,get_wait_list_size=0i,processes_being_spawned=0i 1452984112799527021
+passenger_process,app_root=/var/app/current,code_revision=899ac7f,group_name=/var/app/current/public,life_status=ALIVE,pid=11553,process_group_id=13608,supergroup_name=/var/app/current/public busyness=0i,concurrency=1i,cpu=58i,last_used=1452747071764940i,private_dirty=314900i,processed=951i,pss=319391i,real_memory=314900i,rss=418548i,sessions=0i,spawn_end_time=1452746845013365i,spawn_start_time=1452746844946982i,spawner_creation_time=1452746835922747i,swap=0i,uptime=226i,vmsize=1563580i 1452984112799571490
+passenger_process,app_root=/var/app/current,code_revision=899ac7f,group_name=/var/app/current/public,life_status=ALIVE,pid=11563,process_group_id=13608,supergroup_name=/var/app/current/public busyness=2147483647i,concurrency=1i,cpu=47i,last_used=1452747071709179i,private_dirty=309240i,processed=756i,pss=314036i,real_memory=309240i,rss=418296i,sessions=1i,spawn_end_time=1452746845172460i,spawn_start_time=1452746845136882i,spawner_creation_time=1452746835922747i,swap=0i,uptime=226i,vmsize=1563608i 1452984112799638581
+```