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raspberry / field notes

Metric catalog

Generated from portal catalog v0.1.0, pinned to v0.1.0. Classification describes the data boundary; availability describes source requirements.

report-timestamp-seconds

Section titled “report-timestamp-seconds”

Last report · public

Unix time of the last completed host collection; freshness is calculated from this value.

  • Metric: pi_public_report_timestamp_seconds
  • Unit / type: timestamp / gauge
  • Source: collector clock
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

uptime-seconds

Section titled “uptime-seconds”

Uptime · public

Time since the current boot. A reboot resets this value.

  • Metric: pi_public_uptime_seconds
  • Unit / type: s / gauge
  • Source: /proc/uptime
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

cpu-seconds-total

Section titled “cpu-seconds-total”

CPU time · public

Cumulative per-core CPU time. Guest time is excluded to avoid double counting.

  • Metric: pi_public_cpu_seconds_total
  • Unit / type: s / counter
  • Source: /proc/stat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: core (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63); mode (user, nice, system, idle, iowait, irq, softirq, steal)

load1

Section titled “load1”

Load · 1 min · public

Runnable and uninterruptible task average; compare with CPU core count.

  • Metric: pi_public_load1
  • Unit / type: tasks / gauge
  • Source: /proc/loadavg
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

load5

Section titled “load5”

Load · 5 min · public

Runnable and uninterruptible task average; compare with CPU core count.

  • Metric: pi_public_load5
  • Unit / type: tasks / gauge
  • Source: /proc/loadavg
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

load15

Section titled “load15”

Load · 15 min · public

Runnable and uninterruptible task average; compare with CPU core count.

  • Metric: pi_public_load15
  • Unit / type: tasks / gauge
  • Source: /proc/loadavg
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

cpu-frequency-hertz

Section titled “cpu-frequency-hertz”

CPU frequency · public

Current CPU frequency where the kernel provides it.

  • Metric: pi_public_cpu_frequency_hertz
  • Unit / type: Hz / gauge
  • Source: cpufreq sysfs
  • Interval: 15 seconds
  • Availability: cpufreq sysfs
  • Allowed dimensions: core (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)

context-switches-total

Section titled “context-switches-total”

Context switches · public

Scheduler context switches since boot.

  • Metric: pi_public_context_switches_total
  • Unit / type: switches / counter
  • Source: /proc/stat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

interrupts-total

Section titled “interrupts-total”

Interrupts · public

Aggregate interrupts since boot.

  • Metric: pi_public_interrupts_total
  • Unit / type: interrupts / counter
  • Source: /proc/stat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-total-bytes

Section titled “memory-total-bytes”

Memory · total · public

Kernel-reported total memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_total_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-available-bytes

Section titled “memory-available-bytes”

Memory · available · public

Kernel-reported available memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_available_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-cached-bytes

Section titled “memory-cached-bytes”

Memory · cached · public

Kernel-reported cached memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_cached_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-buffers-bytes

Section titled “memory-buffers-bytes”

Memory · buffers · public

Kernel-reported buffers memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_buffers_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-slab-bytes

Section titled “memory-slab-bytes”

Memory · slab · public

Kernel-reported slab memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_slab_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-dirty-bytes

Section titled “memory-dirty-bytes”

Memory · dirty · public

Kernel-reported dirty memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_dirty_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-swap-total-bytes

Section titled “memory-swap-total-bytes”

Memory · swap total · public

Kernel-reported swap total memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_swap_total_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

memory-swap-free-bytes

Section titled “memory-swap-free-bytes”

Memory · swap free · public

Kernel-reported swap free memory; available memory is an estimate of reclaimable capacity.

  • Metric: pi_public_memory_swap_free_bytes
  • Unit / type: bytes / gauge
  • Source: /proc/meminfo
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

pressure-cpu-percent

Section titled “pressure-cpu-percent”

CPU pressure · public

10-second average of some-task stall time; unavailable when PSI is disabled.

  • Metric: pi_public_pressure_cpu_percent
  • Unit / type: % / gauge
  • Source: /proc/pressure
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

pressure-memory-percent

Section titled “pressure-memory-percent”

MEMORY pressure · public

10-second average of some-task stall time; unavailable when PSI is disabled.

  • Metric: pi_public_pressure_memory_percent
  • Unit / type: % / gauge
  • Source: /proc/pressure
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

pressure-io-percent

Section titled “pressure-io-percent”

IO pressure · public

10-second average of some-task stall time; unavailable when PSI is disabled.

  • Metric: pi_public_pressure_io_percent
  • Unit / type: % / gauge
  • Source: /proc/pressure
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

pgfault-total

Section titled “pgfault-total”

Pgfault · public

Cumulative kernel pgfault count; use a rate or increase across reboots.

  • Metric: pi_public_pgfault_total
  • Unit / type: events / counter
  • Source: /proc/vmstat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

pgmajfault-total

Section titled “pgmajfault-total”

Pgmajfault · public

Cumulative kernel pgmajfault count; use a rate or increase across reboots.

  • Metric: pi_public_pgmajfault_total
  • Unit / type: events / counter
  • Source: /proc/vmstat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

pswpin-total

Section titled “pswpin-total”

Pswpin · public

Cumulative kernel pswpin count; use a rate or increase across reboots.

  • Metric: pi_public_pswpin_total
  • Unit / type: events / counter
  • Source: /proc/vmstat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

pswpout-total

Section titled “pswpout-total”

Pswpout · public

Cumulative kernel pswpout count; use a rate or increase across reboots.

  • Metric: pi_public_pswpout_total
  • Unit / type: events / counter
  • Source: /proc/vmstat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

oom-kill-total

Section titled “oom-kill-total”

Oom kill · public

Cumulative kernel oom_kill count; use a rate or increase across reboots.

  • Metric: pi_public_oom_kill_total
  • Unit / type: events / counter
  • Source: /proc/vmstat
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

filesystem-total-bytes

Section titled “filesystem-total-bytes”

Root space · total · public

Root filesystem capacity using space available to an unprivileged process.

  • Metric: pi_public_filesystem_total_bytes
  • Unit / type: bytes / gauge
  • Source: statvfs
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

filesystem-available-bytes

Section titled “filesystem-available-bytes”

Root space · available · public

Root filesystem capacity using space available to an unprivileged process.

  • Metric: pi_public_filesystem_available_bytes
  • Unit / type: bytes / gauge
  • Source: statvfs
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

filesystem-inodes-total

Section titled “filesystem-inodes-total”

Root inodes · total · public

Root inode count; inode exhaustion can prevent writes even with free bytes.

  • Metric: pi_public_filesystem_inodes_total
  • Unit / type: inodes / gauge
  • Source: statvfs
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

filesystem-inodes-free

Section titled “filesystem-inodes-free”

Root inodes · free · public

Root inode count; inode exhaustion can prevent writes even with free bytes.

  • Metric: pi_public_filesystem_inodes_free
  • Unit / type: inodes / gauge
  • Source: statvfs
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

filesystem-readonly

Section titled “filesystem-readonly”

Root read-only · public

1 means root filesystem is mounted read-only; 0 means writable.

  • Metric: pi_public_filesystem_readonly
  • Unit / type: boolean / gauge
  • Source: statvfs
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-read-bytes-total

Section titled “disk-read-bytes-total”

Disk · read bytes · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_read_bytes_total
  • Unit / type: bytes / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-written-bytes-total

Section titled “disk-written-bytes-total”

Disk · written bytes · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_written_bytes_total
  • Unit / type: bytes / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-reads-total

Section titled “disk-reads-total”

Disk · reads · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_reads_total
  • Unit / type: operations / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-writes-total

Section titled “disk-writes-total”

Disk · writes · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_writes_total
  • Unit / type: operations / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-read-seconds-total

Section titled “disk-read-seconds-total”

Disk · read seconds · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_read_seconds_total
  • Unit / type: s / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-write-seconds-total

Section titled “disk-write-seconds-total”

Disk · write seconds · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_write_seconds_total
  • Unit / type: s / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-busy-seconds-total

Section titled “disk-busy-seconds-total”

Disk · busy seconds · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_busy_seconds_total
  • Unit / type: s / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

disk-weighted-seconds-total

Section titled “disk-weighted-seconds-total”

Disk · weighted seconds · public

Physical block-device aggregate; partitions and virtual devices are excluded. Rates require two samples.

  • Metric: pi_public_disk_weighted_seconds_total
  • Unit / type: s / counter
  • Source: /proc/diskstats
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

network-receive-bytes-total

Section titled “network-receive-bytes-total”

Network · receive bytes · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_receive_bytes_total
  • Unit / type: bytes / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

network-transmit-bytes-total

Section titled “network-transmit-bytes-total”

Network · transmit bytes · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_transmit_bytes_total
  • Unit / type: bytes / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

network-receive-packets-total

Section titled “network-receive-packets-total”

Network · receive packets · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_receive_packets_total
  • Unit / type: events / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

network-transmit-packets-total

Section titled “network-transmit-packets-total”

Network · transmit packets · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_transmit_packets_total
  • Unit / type: events / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

network-receive-errors-total

Section titled “network-receive-errors-total”

Network · receive errors · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_receive_errors_total
  • Unit / type: events / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

network-transmit-errors-total

Section titled “network-transmit-errors-total”

Network · transmit errors · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_transmit_errors_total
  • Unit / type: events / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

network-receive-drops-total

Section titled “network-receive-drops-total”

Network · receive drops · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_receive_drops_total
  • Unit / type: events / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

network-transmit-drops-total

Section titled “network-transmit-drops-total”

Network · transmit drops · public

Counters summed by interface category before labeling, preventing category collisions. Virtual and loopback traffic is excluded.

  • Metric: pi_public_network_transmit_drops_total
  • Unit / type: events / counter
  • Source: /proc/net/dev
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: kind (ethernet, wifi)

tcp-retransmissions-total

Section titled “tcp-retransmissions-total”

Tcp retransmissions · public

Aggregate protocol counter since boot.

  • Metric: pi_public_tcp_retransmissions_total
  • Unit / type: events / counter
  • Source: /proc/net/snmp
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

tcp-in-segments-total

Section titled “tcp-in-segments-total”

Tcp in segments · public

Aggregate protocol counter since boot.

  • Metric: pi_public_tcp_in_segments_total
  • Unit / type: events / counter
  • Source: /proc/net/snmp
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

tcp-out-segments-total

Section titled “tcp-out-segments-total”

Tcp out segments · public

Aggregate protocol counter since boot.

  • Metric: pi_public_tcp_out_segments_total
  • Unit / type: events / counter
  • Source: /proc/net/snmp
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

udp-errors-total

Section titled “udp-errors-total”

Udp errors · public

Aggregate protocol counter since boot.

  • Metric: pi_public_udp_errors_total
  • Unit / type: events / counter
  • Source: /proc/net/snmp
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

tcp-connections

Section titled “tcp-connections”

TCP connections · public

Current established TCP connections, without addresses.

  • Metric: pi_public_tcp_connections
  • Unit / type: connections / gauge
  • Source: /proc/net/snmp
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

wifi-signal-dbm

Section titled “wifi-signal-dbm”

Wi-Fi signal · public

Signal of the primary Wi-Fi interface. No SSID or address is emitted.

  • Metric: pi_public_wifi_signal_dbm
  • Unit / type: dBm / gauge
  • Source: iw link
  • Interval: 60 seconds
  • Availability: iw and associated Wi-Fi
  • Allowed dimensions: none

wifi-bitrate-mbps

Section titled “wifi-bitrate-mbps”

Wi-Fi bitrate · public

Negotiated transmit bitrate; this is not measured throughput.

  • Metric: pi_public_wifi_bitrate_mbps
  • Unit / type: Mbit/s / gauge
  • Source: iw link
  • Interval: 60 seconds
  • Availability: iw and associated Wi-Fi
  • Allowed dimensions: none

temperature-celsius

Section titled “temperature-celsius”

SoC temperature · public

Kernel SoC temperature. Does not imply PMIC or ambient temperature.

  • Metric: pi_public_temperature_celsius
  • Unit / type: °C / gauge
  • Source: thermal_zone0
  • Interval: 15 seconds
  • Availability: thermal sysfs
  • Allowed dimensions: none

core-voltage-volts

Section titled “core-voltage-volts”

Core voltage · public

Firmware-reported core voltage; not input supply voltage or wall power.

  • Metric: pi_public_core_voltage_volts
  • Unit / type: V / gauge
  • Source: vcgencmd measure_volts core
  • Interval: 15 seconds
  • Availability: Raspberry Pi vcgencmd
  • Allowed dimensions: none

power-flag

Section titled “power-flag”

Power / thermal condition · public

Active and since-boot historical undervoltage, frequency capping, throttling and soft temperature-limit flags.

  • Metric: pi_public_power_flag
  • Unit / type: boolean / gauge
  • Source: vcgencmd get_throttled
  • Interval: 15 seconds
  • Availability: Raspberry Pi vcgencmd
  • Allowed dimensions: condition (undervoltage, frequency_capped, throttled, soft_temperature_limit); period (active, historical)

failed-services

Section titled “failed-services”

Failed services · public

Count of failed services, without identities.

  • Metric: pi_public_failed_services
  • Unit / type: services / gauge
  • Source: systemctl
  • Interval: 60 seconds
  • Availability: Linux
  • Allowed dimensions: none

time-synchronized

Section titled “time-synchronized”

Time synchronized · public

1 when systemd reports NTP synchronization; unavailable when that interface cannot answer.

  • Metric: pi_public_time_synchronized
  • Unit / type: boolean / gauge
  • Source: timedatectl
  • Interval: 60 seconds
  • Availability: Linux
  • Allowed dimensions: none

updates-pending

Section titled “updates-pending”

Updates pending · public

Count from cached APT metadata. The collector does not refresh or upgrade packages.

  • Metric: pi_public_updates_pending
  • Unit / type: packages / gauge
  • Source: apt list –upgradable
  • Interval: 3600 seconds
  • Availability: APT cache
  • Allowed dimensions: none

updates-metadata-timestamp-seconds

Section titled “updates-metadata-timestamp-seconds”

Update metadata age · public

Last successful APT metadata refresh stamp, when available.

  • Metric: pi_public_updates_metadata_timestamp_seconds
  • Unit / type: timestamp / gauge
  • Source: APT periodic stamp
  • Interval: 3600 seconds
  • Availability: APT update stamp
  • Allowed dimensions: none

reboot-required

Section titled “reboot-required”

Reboot required · public

Distribution signal. Omitted if this OS has no known producer of the signal.

  • Metric: pi_public_reboot_required
  • Unit / type: boolean / gauge
  • Source: /run/reboot-required
  • Interval: 3600 seconds
  • Availability: update-notifier-common installed
  • Allowed dimensions: none

probe-success

Section titled “probe-success”

Probe success · public

1 for a successful configured router, DNS, Internet or HTTPS probe; no targets are public.

  • Metric: pi_public_probe_success
  • Unit / type: boolean / gauge
  • Source: bounded subprocess
  • Interval: 60 seconds
  • Availability: probe target configured
  • Allowed dimensions: probe (router, dns, internet, portal)

collector-duration-seconds

Section titled “collector-duration-seconds”

Collector duration · public

Time spent in the most recent host collection.

  • Metric: pi_public_collector_duration_seconds
  • Unit / type: s / gauge
  • Source: monotonic clock
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

collector-errors

Section titled “collector-errors”

Collector errors · public

Number of collection sections that failed this run. Missing optional sources are omitted.

  • Metric: pi_public_collector_errors
  • Unit / type: errors / gauge
  • Source: collector
  • Interval: 15 seconds
  • Availability: Linux
  • Allowed dimensions: none

telemetry-storage-bytes

Section titled “telemetry-storage-bytes”

Telemetry storage · public

Alloy state and journal disk usage; constrained to a combined 512 MiB budget.

  • Metric: pi_public_telemetry_storage_bytes
  • Unit / type: bytes / gauge
  • Source: du
  • Interval: 60 seconds
  • Availability: Linux
  • Allowed dimensions: none

systemd-detail

Section titled “systemd-detail”

Service states · private

Automatically enumerated service states and restart counters; identities remain private.

  • Metric: pi_public_systemd_detail
  • Unit / type: varies / gauge
  • Source: Alloy unix/systemd
  • Interval: 60 seconds
  • Availability: Linux
  • Allowed dimensions: none

os-identity

Section titled “os-identity”

OS and boot identity · private

OS/kernel version and boot identity; never exposed through the public API.

  • Metric: pi_public_os_identity
  • Unit / type: varies / gauge
  • Source: Alloy unix
  • Interval: 60 seconds
  • Availability: Linux
  • Allowed dimensions: none

logs

Section titled “logs”

Filtered journal · private

Selected kernel, SSH, systemd, network, updates and Alloy logs with best-effort redaction.

  • Metric: pi_public_logs
  • Unit / type: varies / gauge
  • Source: Alloy journald
  • Interval: 60 seconds
  • Availability: Linux
  • Allowed dimensions: none

container-resources

Section titled “container-resources”

Container resources · private

Automatically discovers containers after a supported runtime and the opt-in exporter are configured. Not installed by default.

  • Metric: pi_public_container_resources
  • Unit / type: varies / gauge
  • Source: Opt-in cAdvisor
  • Interval: 60 seconds
  • Availability: opt-in
  • Allowed dimensions: none

application-red

Section titled “application-red”

Application RED / traces · private

Requires application instrumentation or a compatible exporter; arbitrary ports are never scanned.

  • Metric: pi_public_application_red
  • Unit / type: varies / gauge
  • Source: Opt-in instrumentation
  • Interval: 60 seconds
  • Availability: opt-in
  • Allowed dimensions: none

sd-health

Section titled “sd-health”

SD-card health · unsupported

Unavailable on standard microSD interfaces.

  • Metric: pi_public_sd_health
  • Unit / type: varies / gauge
  • Source: none
  • Interval: 60 seconds
  • Availability: unsupported
  • Allowed dimensions: none

wall-power

Section titled “wall-power”

Wall power · unsupported

Requires an external power meter.

  • Metric: pi_public_wall_power
  • Unit / type: varies / gauge
  • Source: none
  • Interval: 60 seconds
  • Availability: unsupported
  • Allowed dimensions: none

fan-speed

Section titled “fan-speed”

Fan speed · unsupported

Unavailable unless supported tachometer hardware is installed.

  • Metric: pi_public_fan_speed
  • Unit / type: varies / gauge
  • Source: none
  • Interval: 60 seconds
  • Availability: unsupported
  • Allowed dimensions: none

pmic-temperature

Section titled “pmic-temperature”

PMIC temperature · unsupported

Not assumed available on Raspberry Pi 4.

  • Metric: pi_public_pmic_temperature
  • Unit / type: varies / gauge
  • Source: none
  • Interval: 60 seconds
  • Availability: unsupported
  • Allowed dimensions: none

timer-outcomes

Section titled “timer-outcomes”

Timer outcomes · private

Selected timers require an explicit unit allowlist and outcome interpretation.

  • Metric: pi_public_timer_outcomes
  • Unit / type: varies / gauge
  • Source: Opt-in systemd units
  • Interval: 60 seconds
  • Availability: opt-in
  • Allowed dimensions: none

wifi-retries

Section titled “wifi-retries”

Wi-Fi retries / failures · private

Requires compatible iw station statistics; not emitted by the initial collector.

  • Metric: pi_public_wifi_retries
  • Unit / type: varies / gauge
  • Source: Opt-in driver statistics
  • Interval: 60 seconds
  • Availability: opt-in
  • Allowed dimensions: none