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Add gauges for allocated memory for queued UDP and TCP packages (#1503)

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* Two new states will be added to the tcpstat collector called rx_queued_bytes and tx_queued_bytes.

For UDP datagrams an additional collector 'udp_queues' can be used to expose the total lengths of the tx_queue and rx_queue.
@SuperQ and @discordianfish this changes gives us the option to check for overloaded UDP + TCP processing.
The names of the new TCP states and the UDP metric can be discussed.
The current reasons are just:

I don't want to add another collector for the same exposed file, so I just added the new states to the tcpstat collector.
I chose the name 'udp_queue' instead of 'udpstat' as UDP has no state.


Signed-off-by: Peter Bueschel <peter.bueschel@logmein.com>
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Peter Bueschel 2020-03-31 10:46:32 +02:00 • committed by GitHub
commit da5972b539
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9 changed files with 189 additions and 4 deletions
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@ -60,6 +60,7 @@ textfile | Exposes statistics read from local disk. The `--collector.textfile.di
thermal\_zone | Exposes thermal zone & cooling device statistics from `/sys/class/thermal`. | Linux
time | Exposes the current system time. | _any_
timex | Exposes selected adjtimex(2) system call stats. | Linux
udp_queues | Exposes UDP total lengths of the rx_queue and tx_queue from `/proc/net/udp` and `/proc/net/udp6`. | Linux
uname | Exposes system information as provided by the uname system call. | Darwin, FreeBSD, Linux, OpenBSD
vmstat | Exposes statistics from `/proc/vmstat`. | Linux
xfs | Exposes XFS runtime statistics. | Linux (kernel 4.4+)