raspberrypi prometheus exporter

hardware/raspberrypi/prometheus-exporter/files/raspberrypi_exporter.sh

@@ -0,0 +1,85 @@
+#!/bin/bash
+
+set -eu
+
+VCGEN="$(command -v vcgencmd)"
+METRICS_DIR="/tmp/textfile-collector"
+METRICS_FILE="${METRICS_DIR}/raspberrypi-metrics.prom"
+TMP_FILE="${METRICS_FILE}.tmp"
+PREFIX="rpi_"
+
+[[ ! -d ${METRICS_DIR} ]] && mkdir -p ${METRICS_DIR}
+
+# remove existing files
+rm -f "${TMP_FILE}"
+
+# get temperatures
+{
+  echo "# HELP ${PREFIX}temperature Temperatures of the components in degree celsius.";
+  echo "# TYPE ${PREFIX}temperature gauge";
+} >> "${TMP_FILE}"
+for SENSOR in $(ls /sys/class/thermal/); do
+  unset CPU_TEMP_CELSIUS
+  unset CPU_TYPE
+
+  CPU_TEMP_CELSIUS="$(awk '{printf "%.3f", $1/1000}' /sys/class/thermal/${SENSOR}/temp)" || true
+  CPU_TEMP_CELSIUS="${CPU_TEMP_CELSIUS:=0}"
+  CPU_TYPE="$(cat /sys/class/thermal/${SENSOR}/type)"
+  CPU_TYPE="${CPU_TYPE:=N/A}"
+
+  echo "${PREFIX}temperature{sensor=\"${SENSOR}\",type=\"${CPU_TYPE}\"} ${CPU_TEMP_CELSIUS}" >> "${TMP_FILE}"
+done
+GPU_TEMP_CELSIUS="$( $VCGEN measure_temp | cut -d'=' -f2 | cut -d"'" -f1 )" || true
+GPU_TEMP_CELSIUS="${GPU_TEMP_CELSIUS:=0}"
+echo "${PREFIX}temperature{sensor=\"bcm2835\",type=\"gpu\"} ${GPU_TEMP_CELSIUS}" >> "${TMP_FILE}"
+
+# get component frequencies
+{
+  echo "# HELP ${PREFIX}frequency Clock frequencies of the components in hertz.";
+  echo "# TYPE ${PREFIX}frequency gauge";
+} >> "${TMP_FILE}"
+declare -a FREQ_COMPONENTS=("arm" "core" "h264" "isp" "v3d" "uart" "pwm" "emmc" "pixel" "hdmi")
+for FREQ_COMPONENT in "${FREQ_COMPONENTS[@]}"; do
+  unset FREQUENCE
+
+  FREQUENCE="$($VCGEN measure_clock "${FREQ_COMPONENT}" | cut -d '=' -f 2)" || true
+  FREQUENCE="${FREQUENCE:=0}"
+
+  echo "${PREFIX}frequency{component=\"${FREQ_COMPONENT}\"} ${FREQUENCE}" >> "${TMP_FILE}"
+done
+
+# get component voltages
+{
+  echo "# HELP ${PREFIX}voltage Voltages of the components in volts.";
+  echo "# TYPE ${PREFIX}voltage gauge";
+} >> "${TMP_FILE}"
+declare -a VOLT_COMPONENTS=("core" "sdram_c" "sdram_i" "sdram_p")
+for VOLT_COMPONENT in "${VOLT_COMPONENTS[@]}"; do
+  unset VOLTS
+
+  VOLTS="$($VCGEN measure_volts "${VOLT_COMPONENT}" | cut -d '=' -f 2 | sed 's/V$//')" || true
+  VOLTS="${VOLTS:=0}"
+
+  echo "${PREFIX}voltage{component=\"${VOLT_COMPONENT}\"} ${VOLTS}" >> "${TMP_FILE}"
+done
+
+# get memory split of CPU vs GPU
+{
+  echo "# HELP ${PREFIX}memory Memory split of CPU and GPU in bytes.";
+  echo "# TYPE ${PREFIX}memory gauge";
+} >> "${TMP_FILE}"
+declare -a MEM_COMPONENTS=("arm" "gpu")
+for MEM_COMPONENT in "${MEM_COMPONENTS[@]}"; do
+  unset MEM
+
+  MEM="$($VCGEN get_mem "${MEM_COMPONENT}" | cut -d '=' -f 2 | sed 's/M$//')" || true
+  MEM="${MEM:=0}"
+  MEM="$(( MEM * 1024 * 1024 ))"
+
+  echo "${PREFIX}memory{component=\"${MEM_COMPONENT}\"} ${MEM}" >> "${TMP_FILE}"
+done
+
+# write metrics file
+mv "${TMP_FILE}" "${METRICS_FILE}"
+
+exit 0

hardware/raspberrypi/prometheus-exporter/ini.sls

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+
+include:
+  - systemd.units
+
+file-prometheus-exporter:
+  file:
+    - managed
+    - name: /usr/local/sbin/raspberrypi_exporter
+    - source: salt://hardware/raspberrypi/prometheus-exporter/files/raspberrypi_exporter.sh
+    - user: pi
+    - group: gpio
+    - mode: 0755
+
+raspberrypi_exporter:
+  service.enabled:
+    - enable: True
+    - watch:
+      - file: /usr/local/sbin/raspberrypi_exporter
+