Adding upstream version 1.34.4.

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

plugins/inputs/ipvs/README.md

@@ -0,0 +1,115 @@
+# IPVS Input Plugin
+
+This plugin gathers metrics about the [IPVS virtual and real servers][ipvs]
+using the netlink socket interface of the Linux kernel.
+
+> [!IMPORTANT]
+> The plugin requires `CAP_NET_ADMIN` and `CAP_NET_RAW` capabilities.
+> Check the [permissions section](#permissions) for ways to grant them.
+
+⭐ Telegraf v1.9.0
+🏷️ network, system
+💻 linux
+
+[ipvs]: http://www.linuxvirtualserver.org/software/ipvs.html
+
+## 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
+# Collect virtual and real server stats from Linux IPVS
+# This plugin ONLY supports Linux
+[[inputs.ipvs]]
+  # no configuration
+```
+
+### Permissions
+
+Assuming you installed the Telegraf package via one of the published packages,
+the process will be running as the `telegraf` user. However, in order for this
+plugin to communicate over netlink sockets it needs the telegraf process to have
+`CAP_NET_ADMIN` and `CAP_NET_RAW` capabilities.
+
+This is the case when running Telegraf as `root` or some user with
+`CAP_NET_ADMIN` and `CAP_NET_RAW`. Alternatively, you can add the capabilities
+when starting Telegraf via systemd by running `systemctl edit telegraf.service`
+and add the following:
+
+```shell
+[Service]
+CapabilityBoundingSet=CAP_NET_RAW CAP_NET_ADMIN
+AmbientCapabilities=CAP_NET_RAW CAP_NET_ADMIN
+```
+
+## Metrics
+
+Server will contain tags identifying how it was configured, using one of
+`address` + `port` + `protocol` *OR* `fwmark`. This is how one would normally
+configure a virtual server using `ipvsadm`.
+
+- ipvs_virtual_server
+  - tags:
+    - sched (the scheduler in use)
+    - netmask (the mask used for determining affinity)
+    - address_family (inet/inet6)
+    - address
+    - port
+    - protocol
+    - fwmark
+  - fields:
+    - connections
+    - pkts_in
+    - pkts_out
+    - bytes_in
+    - bytes_out
+    - pps_in
+    - pps_out
+    - cps
+
+- ipvs_real_server
+  - tags:
+    - address
+    - port
+    - address_family (inet/inet6)
+    - virtual_address
+    - virtual_port
+    - virtual_protocol
+    - virtual_fwmark
+  - fields:
+    - active_connections
+    - inactive_connections
+    - connections
+    - pkts_in
+    - pkts_out
+    - bytes_in
+    - bytes_out
+    - pps_in
+    - pps_out
+    - cps
+
+## Example Output
+
+Virtual server is configured using `fwmark` and backed by 2 real servers:
+
+```text
+ipvs_virtual_server,address=172.18.64.234,address_family=inet,netmask=32,port=9000,protocol=tcp,sched=rr bytes_in=0i,bytes_out=0i,pps_in=0i,pps_out=0i,cps=0i,connections=0i,pkts_in=0i,pkts_out=0i 1541019340000000000
+ipvs_real_server,address=172.18.64.220,address_family=inet,port=9000,virtual_address=172.18.64.234,virtual_port=9000,virtual_protocol=tcp active_connections=0i,inactive_connections=0i,pkts_in=0i,bytes_out=0i,pps_out=0i,connections=0i,pkts_out=0i,bytes_in=0i,pps_in=0i,cps=0i 1541019340000000000
+ipvs_real_server,address=172.18.64.219,address_family=inet,port=9000,virtual_address=172.18.64.234,virtual_port=9000,virtual_protocol=tcp active_connections=0i,inactive_connections=0i,pps_in=0i,pps_out=0i,connections=0i,pkts_in=0i,pkts_out=0i,bytes_in=0i,bytes_out=0i,cps=0i 1541019340000000000
+```
+
+Virtual server is configured using `proto+addr+port` and backed by 2 real
+servers:
+
+```text
+ipvs_virtual_server,address_family=inet,fwmark=47,netmask=32,sched=rr cps=0i,connections=0i,pkts_in=0i,pkts_out=0i,bytes_in=0i,bytes_out=0i,pps_in=0i,pps_out=0i 1541019340000000000
+ipvs_real_server,address=172.18.64.220,address_family=inet,port=9000,virtual_fwmark=47 inactive_connections=0i,pkts_out=0i,bytes_out=0i,pps_in=0i,cps=0i,active_connections=0i,pkts_in=0i,bytes_in=0i,pps_out=0i,connections=0i 1541019340000000000
+ipvs_real_server,address=172.18.64.219,address_family=inet,port=9000,virtual_fwmark=47 cps=0i,active_connections=0i,inactive_connections=0i,connections=0i,pkts_in=0i,bytes_out=0i,pkts_out=0i,bytes_in=0i,pps_in=0i,pps_out=0i 1541019340000000000
+```