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Add collector for PCIe devices with link information (prometheus#3339)
* Add collector for PCIe devices with link information The link status of PCIe devices sometimes changes, like link or speed downgrades, and devices disappear. This patch collects PCIe devices' link infromation to detect such failures. As a first step, this collector exports PCIe devices' - Device information (vendor_id, device_id, etc.) - Parent PCIe device (e.g. PCIe bridge, PCIe switch) - Link status (max_link_{transfers_per_second|width}, current_link_{transfers_per_second|width}) --------- Signed-off-by: Naoki MATSUMOTO <[email protected]>
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‎README.md‎

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@@ -201,6 +201,7 @@ logind | Exposes session counts from [logind](http://www.freedesktop.org/wiki/So
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meminfo\_numa | Exposes memory statistics from `/sys/devices/system/node/node[0-9]*/meminfo`, `/sys/devices/system/node/node[0-9]*/numastat`. | Linux
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mountstats | Exposes filesystem statistics from `/proc/self/mountstats`. Exposes detailed NFS client statistics. | Linux
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network_route | Exposes the routing table as metrics | Linux
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pcidevice | Exposes pci devices' information including their link status and parent devices. | Linux
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perf | Exposes perf based metrics (Warning: Metrics are dependent on kernel configuration and settings). | Linux
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processes | Exposes aggregate process statistics from `/proc`. | Linux
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qdisc | Exposes [queuing discipline](https://en.wikipedia.org/wiki/Network_scheduler#Linux_kernel) statistics | Linux

‎collector/fixtures/e2e-64k-page-output.txt‎

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@@ -2832,6 +2832,26 @@ node_os_info{build_id="",id="ubuntu",id_like="debian",image_id="",image_version=
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# HELP node_os_version Metric containing the major.minor part of the OS version.
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# TYPE node_os_version gauge
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node_os_version{id="ubuntu",id_like="debian",name="Ubuntu"} 20.04
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# HELP node_pcidevice_current_link_transfers_per_second Value of current link's transfers per second (T/s)
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# TYPE node_pcidevice_current_link_transfers_per_second gauge
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node_pcidevice_current_link_transfers_per_second{bus="00",device="02",function="1",segment="0000"} 8e+09
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node_pcidevice_current_link_transfers_per_second{bus="01",device="00",function="0",segment="0000"} 8e+09
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# HELP node_pcidevice_current_link_width Value of current link's width (number of lanes)
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# TYPE node_pcidevice_current_link_width gauge
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node_pcidevice_current_link_width{bus="00",device="02",function="1",segment="0000"} 4
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node_pcidevice_current_link_width{bus="01",device="00",function="0",segment="0000"} 4
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# HELP node_pcidevice_info Non-numeric data from /sys/bus/pci/devices/<location>, value is always 1.
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# TYPE node_pcidevice_info gauge
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node_pcidevice_info{bus="00",class_id="0x060400",device="02",function="1",parent_bus="*",parent_device="*",parent_function="*",parent_segment="*",revision="0x00",segment="0000",subsystem_device_id="0x5095",subsystem_vendor_id="0x17aa",vendor_id="0x1634"} 1
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node_pcidevice_info{bus="01",class_id="0x010802",device="00",function="0",parent_bus="00",parent_device="02",parent_function="1",parent_segment="0000",revision="0x01",segment="0000",subsystem_device_id="0x5021",subsystem_vendor_id="0xc0a9",vendor_id="0x540a"} 1
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# HELP node_pcidevice_max_link_transfers_per_second Value of maximum link's transfers per second (T/s)
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# TYPE node_pcidevice_max_link_transfers_per_second gauge
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node_pcidevice_max_link_transfers_per_second{bus="00",device="02",function="1",segment="0000"} 8e+09
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node_pcidevice_max_link_transfers_per_second{bus="01",device="00",function="0",segment="0000"} 1.6e+10
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# HELP node_pcidevice_max_link_width Value of maximum link's width (number of lanes)
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# TYPE node_pcidevice_max_link_width gauge
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node_pcidevice_max_link_width{bus="00",device="02",function="1",segment="0000"} 8
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node_pcidevice_max_link_width{bus="01",device="00",function="0",segment="0000"} 4
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# HELP node_power_supply_capacity capacity value of /sys/class/power_supply/<power_supply>.
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# TYPE node_power_supply_capacity gauge
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node_power_supply_capacity{power_supply="BAT0"} 81
@@ -2991,6 +3011,7 @@ node_scrape_collector_success{collector="nfs"} 1
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node_scrape_collector_success{collector="nfsd"} 1
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node_scrape_collector_success{collector="nvme"} 1
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node_scrape_collector_success{collector="os"} 1
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node_scrape_collector_success{collector="pcidevice"} 1
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node_scrape_collector_success{collector="powersupplyclass"} 1
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node_scrape_collector_success{collector="pressure"} 1
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node_scrape_collector_success{collector="processes"} 1

‎collector/fixtures/e2e-output.txt‎

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@@ -2854,6 +2854,26 @@ node_os_info{build_id="",id="ubuntu",id_like="debian",image_id="",image_version=
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# HELP node_os_version Metric containing the major.minor part of the OS version.
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# TYPE node_os_version gauge
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node_os_version{id="ubuntu",id_like="debian",name="Ubuntu"} 20.04
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# HELP node_pcidevice_current_link_transfers_per_second Value of current link's transfers per second (T/s)
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# TYPE node_pcidevice_current_link_transfers_per_second gauge
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node_pcidevice_current_link_transfers_per_second{bus="00",device="02",function="1",segment="0000"} 8e+09
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node_pcidevice_current_link_transfers_per_second{bus="01",device="00",function="0",segment="0000"} 8e+09
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# HELP node_pcidevice_current_link_width Value of current link's width (number of lanes)
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# TYPE node_pcidevice_current_link_width gauge
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node_pcidevice_current_link_width{bus="00",device="02",function="1",segment="0000"} 4
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node_pcidevice_current_link_width{bus="01",device="00",function="0",segment="0000"} 4
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# HELP node_pcidevice_info Non-numeric data from /sys/bus/pci/devices/<location>, value is always 1.
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# TYPE node_pcidevice_info gauge
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node_pcidevice_info{bus="00",class_id="0x060400",device="02",function="1",parent_bus="*",parent_device="*",parent_function="*",parent_segment="*",revision="0x00",segment="0000",subsystem_device_id="0x5095",subsystem_vendor_id="0x17aa",vendor_id="0x1634"} 1
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node_pcidevice_info{bus="01",class_id="0x010802",device="00",function="0",parent_bus="00",parent_device="02",parent_function="1",parent_segment="0000",revision="0x01",segment="0000",subsystem_device_id="0x5021",subsystem_vendor_id="0xc0a9",vendor_id="0x540a"} 1
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# HELP node_pcidevice_max_link_transfers_per_second Value of maximum link's transfers per second (T/s)
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# TYPE node_pcidevice_max_link_transfers_per_second gauge
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node_pcidevice_max_link_transfers_per_second{bus="00",device="02",function="1",segment="0000"} 8e+09
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node_pcidevice_max_link_transfers_per_second{bus="01",device="00",function="0",segment="0000"} 1.6e+10
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# HELP node_pcidevice_max_link_width Value of maximum link's width (number of lanes)
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# TYPE node_pcidevice_max_link_width gauge
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node_pcidevice_max_link_width{bus="00",device="02",function="1",segment="0000"} 8
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node_pcidevice_max_link_width{bus="01",device="00",function="0",segment="0000"} 4
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# HELP node_power_supply_capacity capacity value of /sys/class/power_supply/<power_supply>.
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# TYPE node_power_supply_capacity gauge
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node_power_supply_capacity{power_supply="BAT0"} 81
@@ -3013,6 +3033,7 @@ node_scrape_collector_success{collector="nfs"} 1
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node_scrape_collector_success{collector="nfsd"} 1
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node_scrape_collector_success{collector="nvme"} 1
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node_scrape_collector_success{collector="os"} 1
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node_scrape_collector_success{collector="pcidevice"} 1
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node_scrape_collector_success{collector="powersupplyclass"} 1
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node_scrape_collector_success{collector="pressure"} 1
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node_scrape_collector_success{collector="processes"} 1

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