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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>
This commit is contained in:
Peter Bueschel 2020-03-31 10:46:32 +02:00 • committed by GitHub
commit da5972b539
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 189 additions and 4 deletions
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5
collector/fixtures/e2e-output.txt
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@ -2644,6 +2644,7 @@ node_scrape_collector_success{collector="softnet"} 1
node_scrape_collector_success{collector="stat"} 1
node_scrape_collector_success{collector="textfile"} 1
node_scrape_collector_success{collector="thermal_zone"} 1
node_scrape_collector_success{collector="udp_queues"} 1
node_scrape_collector_success{collector="vmstat"} 1
node_scrape_collector_success{collector="wifi"} 1
node_scrape_collector_success{collector="xfs"} 1
@ -2734,6 +2735,10 @@ node_textfile_scrape_error 0
# HELP node_thermal_zone_temp Zone temperature in Celsius
# TYPE node_thermal_zone_temp gauge
node_thermal_zone_temp{type="cpu-thermal",zone="0"} 12.376
# HELP node_udp_queues Number of allocated memory in the kernel for UDP datagrams in bytes.
# TYPE node_udp_queues gauge
node_udp_queues{ip="v4",queue="rx"} 0
node_udp_queues{ip="v4",queue="tx"} 21
# HELP node_vmstat_oom_kill /proc/vmstat information field oom_kill.
# TYPE node_vmstat_oom_kill untyped
node_vmstat_oom_kill 0

4
collector/fixtures/proc/net/tcpstat
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@ -1,3 +1,3 @@
sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
0: 00000000:0016 00000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 2740 1 ffff88003d3af3c0 100 0 0 10 0
1: 0F02000A:0016 0202000A:8B6B 01 00000000:00000000 02:000AC99B 00000000 0 0 3652 4 ffff88003d3ae040 21 4 31 47 46
0: 00000000:0016 00000000:0000 0A 00000015:00000000 00:00000000 00000000 0 0 2740 1 ffff88003d3af3c0 100 0 0 10 0
1: 0F02000A:0016 0202000A:8B6B 01 00000015:00000001 02:000AC99B 00000000 0 0 3652 4 ffff88003d3ae040 21 4 31 47 46

2
collector/fixtures/proc/net/udp Normal file
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@ -0,0 +1,2 @@
sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
0: 00000000:0016 00000000:0000 0A 00000015:00000000 00:00000000 00000000 0 0 2740 1 ffff88003d3af3c0 100 0 0 10 0